Develop Reference

FATAL EXCEPTION : main (Android std) - java

While I run this on my device it will crash and my logcat is as below:
2020-12-19 17:03:28.204 24798-24798/com.example.emergencynotificationhealthcare E/AndroidRuntime:
FATAL EXCEPTION: main
Process: com.example.emergencynotificationhealthcare, PID: 24798
java.lang.RuntimeException: Unable to start activity
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2799)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2870)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1573)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6605)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:999)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:889)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void
android.view.View.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
at com.example.emergencynotificationhealthcare.Login.onCreate(Login.java:42)
at android.app.Activity.performCreate(Activity.java:6964)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2752)
Here is my activity_register.xml:
<ImageView
android:layout_width="101dp"
android:layout_height="69dp"
android:transitionName="logo_logo"
android:src="#drawable/logo_new"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="-10dp"
android:fontFamily="#font/bungee"
android:text="Welcome"
android:transitionName="logo_text"
android:textColor="#ff8e88"
android:textSize="30sp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Register to start"
android:textSize="16sp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginTop="10dp">
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Username"
app:counterEnabled="true"
app:counterMaxLength="15"
style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text"
android:transitionName="user_tran"/>
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Email"
style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"/>
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/phoneNo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Phone Number"
style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="number"/>
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Password"
app:passwordToggleEnabled="true"
style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:transitionName="password_tran"/>
</com.google.android.material.textfield.TextInputLayout>
</LinearLayout>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="User Type"
android:layout_marginLeft="5dp"
android:textSize="17dp"/>
<CheckBox
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="User" />
<CheckBox
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Guardian"/>
<Button
android:id="#+id/login_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="50dp"
android:background="#ff8e88"
android:text="Register"
android:textColor="#fff"
android:transitionName="button_tran"/>
<Button
android:id="#+id/register_screen"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Already have an account? LOGIN"
android:background="#00000000"
android:transitionName="login_register_tran"/>
Here is my Login.java:
Button callRegister, login_btn;
ImageView image;
TextView logoText, sloganText;
TextInputLayout username,password;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_login);
callRegister = findViewById(R.id.register_screen);
image = findViewById(R.id.imageView);
logoText = findViewById(R.id.logo_name);
sloganText = findViewById(R.id.slogan_name);
username = findViewById(R.id.username);
password = findViewById(R.id.password);
login_btn = findViewById(R.id.login_btn);
callRegister.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Login.this,Register.class);
Pair[] pairs = new Pair[7];
pairs[0] = new Pair<View,String>(image,"logo_logo");
pairs[1] = new Pair<View,String>(logoText,"logo_text");
pairs[2] = new Pair<View,String>(sloganText,"logo_desc");
pairs[3] = new Pair<View,String>(username,"user_tran");
pairs[4] = new Pair<View,String>(password,"password_tran");
pairs[5] = new Pair<View,String>(login_btn,"button_tran");
pairs[6] = new Pair<View,String>(callRegister,"login_register_tran");
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(Login.this,pairs);
startActivity(intent, options.toBundle());
}
}
});
}
Here is my activity_login.xml
<ImageView
android:layout_width="101dp"
android:layout_height="69dp"
android:src="#drawable/logo_new"
android:transitionName="logo_logo"/>
<TextView
android:id="#+id/logo_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/bungee"
android:text="Hi, Welcome Back!"
android:transitionName="logo_text"
android:textColor="#ff8e88"
android:textSize="40sp"/>
<TextView
android:id="#+id/slogan_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Sign in to continue"
android:transitionName="logo_desc"
android:textSize="18sp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:layout_marginTop="10dp"
android:layout_marginBottom="20dp"
android:orientation="vertical">
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/username"
style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Username">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/password"
style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Password"
app:passwordToggleEnabled="true">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword" />
</com.google.android.material.textfield.TextInputLayout>
<CheckBox
style="#style/Widget.AppCompat.CompoundButton.CheckBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Remember Me" />
<Button
android:layout_width="160dp"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_margin="3dp"
android:background="#00000000"
android:elevation="0dp"
android:text="Forget Password" />
<Button
android:id="#+id/btnLogin"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
android:background="#ff8e88"
android:text="Log In"
android:textColor="#fff" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_margin="5dp"
android:background="#00000000"
android:elevation="0dp"
android:fontFamily="#font/antic"
android:text="New Member? REGISTER"
android:textColor="#000" />
</LinearLayout>
</LinearLayout>

Did you inflate the correct layout file? activity_register is the name of the file you said, but your code uses
setContentView(R.layout.activity_login);.
Try replacing that with setContentView(R.layout.activity_register); if that's not the case.

Related

I've got a NestedScrollView inside of a ScrollView because I have an Activity with three hidden fragments that contain text, and when you click one of the fragments it opens to reveal the text. But the thing is that there is quite a bit of text so I'm using NestedScrollView so the reader can read all of it, and the first time it works fine (text doesn't overlap), and then second time when I close the fragment and re-open it the text starts overlapping...
So as mentioned, first time it doesn't happen, and then I close the fragment and reopen it and this happens:
So why is this happening and how can I fix it?
Fragment inside Activity
<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:scrollbars="none"
tools:context=".Fragment.PrivacyFragment">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginTop="5dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="22sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/Grey"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/Grey"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/Grey"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="22dp"
android:layout_marginEnd="20dp"
android:padding="8dp"
android:textColor="#color/colorBlack"
android:textSize="16sp" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
Activity
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/button_gradient_two">
<RelativeLayout
android:id="#+id/relative_layout_one"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="25dp"
android:layout_marginEnd="10dp">
</RelativeLayout>
<ScrollView
android:id="#+id/scroll_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="none">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/arrow_back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="25dp"
android:padding="8dp"
android:src="#drawable/icon_search_100" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="25dp"
android:padding="8dp"
android:text="Settings"
android:textColor="#color/White"
android:textSize="22sp"
android:textStyle="bold" />
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/image_profile"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="100dp"
android:elevation="16dp"
android:src="#drawable/profile_placeholder" />
<com.google.android.material.card.MaterialCardView
style="#style/CustomCardViewStyle"
android:layout_width="match_parent"
android:layout_height="1000dp"
android:layout_marginTop="150dp"
app:cardElevation="12dp">
<RelativeLayout
android:id="#+id/relative_layout_two"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dp"
android:gravity="center_horizontal"
android:text="Jack Sparrow"
android:textColor="#color/Black"
android:textSize="32sp"
android:textStyle="bold" />
<TextView
android:id="#+id/username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/name"
android:layout_centerHorizontal="true"
android:gravity="center_horizontal"
android:text="jacksparrow"
android:textColor="#color/Grey"
android:textSize="22sp"
android:textStyle="" />
<TextView
android:id="#+id/bio"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/username"
android:layout_centerHorizontal="true"
android:layout_marginTop="4dp"
android:gravity="center_horizontal"
android:text="This is my bio!"
android:textColor="#color/Grey"
android:textStyle="" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/bio"
android:orientation="vertical">
<TextView
android:id="#+id/privacy"
style="#style/SelectableItemBackground"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="12dp"
android:text="#string/privacy"
android:textColor="#color/colorBlack"
android:textSize="18sp" />
<FrameLayout
android:id="#+id/container_privacy"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
<TextView
android:id="#+id/security"
style="#style/SelectableItemBackground"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="12dp"
android:text="#string/security"
android:textColor="#color/colorBlack"
android:textSize="18sp" />
<FrameLayout
android:id="#+id/container_security"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
<TextView
android:id="#+id/help"
style="#style/SelectableItemBackground"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="12dp"
android:text="#string/help"
android:textColor="#color/colorBlack"
android:textSize="18sp" />
<FrameLayout
android:id="#+id/container_help"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
<TextView
android:id="#+id/about"
style="#style/SelectableItemBackground"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="12dp"
android:text="#string/about"
android:textColor="#color/colorBlack"
android:textSize="18sp" />
<FrameLayout
android:id="#+id/container_about"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
</LinearLayout>
</RelativeLayout>
</com.google.android.material.card.MaterialCardView>
</RelativeLayout>
</ScrollView>
</RelativeLayout>
SettingsActivity
public class SettingsActivity extends AppCompatActivity {
private ImageView mImageProfile, mBackArrow;
private TextView mName, mUsername, mBio, mPrivacy, mSecurity, mHelp, mAbout;
private FirebaseUser mFirebaseUser;
private FrameLayout mPrivacyContainer, mSecurityContainer, mHelpContainer, mAboutContainer;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings_tester);
mFirebaseUser = FirebaseAuth.getInstance().getCurrentUser();
mImageProfile = findViewById(R.id.image_profile);
mName = findViewById(R.id.name);
mUsername = findViewById(R.id.username);
mBio = findViewById(R.id.bio);
mPrivacy = findViewById(R.id.privacy);
mSecurity = findViewById(R.id.security);
mHelp = findViewById(R.id.help);
mAbout = findViewById(R.id.about);
mImageProfile.setAnimation(AnimationUtils.loadAnimation(getApplicationContext(), R.anim.profile_animation_profile_picture));
mName.setAnimation(AnimationUtils.loadAnimation(getApplicationContext(), R.anim.profile_animation_name));
mUsername.setAnimation(AnimationUtils.loadAnimation(getApplicationContext(), R.anim.profile_animation_username));
mBio.setAnimation(AnimationUtils.loadAnimation(getApplicationContext(), R.anim.profile_animation_bio));
mPrivacyContainer = findViewById(R.id.container_privacy);
mSecurityContainer = findViewById(R.id.container_security);
mHelpContainer = findViewById(R.id.container_help);
mAboutContainer = findViewById(R.id.container_about);
mPrivacy.setOnClickListener(v -> {
getSupportFragmentManager().beginTransaction().add(R.id.container_privacy, new PrivacyFragment(), null).addToBackStack(null).commit();
if (mPrivacyContainer.getVisibility() == View.GONE) {
mPrivacyContainer.setVisibility(View.VISIBLE);
} else {
mPrivacyContainer.setVisibility(View.GONE);
}
});
mSecurity.setOnClickListener(v -> {
getSupportFragmentManager().beginTransaction().add(R.id.container_security, new SecurityFragment(), null).addToBackStack(null).commit();
if (mSecurityContainer.getVisibility() == View.GONE) {
mSecurityContainer.setVisibility(View.VISIBLE);
} else {
mSecurityContainer.setVisibility(View.GONE);
}
});
mHelp.setOnClickListener(v -> {
getSupportFragmentManager().beginTransaction().add(R.id.container_help, new HelpFragment(), null).addToBackStack(null).commit();
if (mHelpContainer.getVisibility() == View.GONE) {
mHelpContainer.setVisibility(View.VISIBLE);
} else {
mHelpContainer.setVisibility(View.GONE);
}
});
mAbout.setOnClickListener(v -> {
getSupportFragmentManager().beginTransaction().add(R.id.container_about, new AboutFragment(), null).addToBackStack(null).commit();
if (mAboutContainer.getVisibility() == View.GONE) {
mAboutContainer.setVisibility(View.VISIBLE);
} else {
mAboutContainer.setVisibility(View.GONE);
}
});
getUserInfo();
setBackArrow();
}
private void getUserInfo() {
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Users").child(mFirebaseUser.getUid());
reference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
User user = dataSnapshot.getValue(User.class);
if (user != null) {
mName.setText(user.getFullname());
mUsername.setText(user.getUsername());
mBio.setText(user.getBio());
if (user.getImageurl() == null) {
mImageProfile.setImageResource(R.drawable.profile_placeholder);
} else {
Glide.with(getApplicationContext()).load(user.getImageurl()).into(mImageProfile);
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
private void setBackArrow() {
mBackArrow = findViewById(R.id.arrow_back);
mBackArrow.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
}
});
}
}

You are getting the fragment overlapped because there is a new fragment added each time.
You simply need to do a check if the fragment exits already then there is no need to add a new fragment. You can assign a 'tag' when adding fragment. Code as follows-
if (fragmentManager.findFragmentByTag("First Fragment") == null)
fragmentManager.beginTransaction().add(R.id.fragment, new FirstFragment(), "First Fragment").commit();
OR
Rather then using .add() method use .replace() to make sure fragment got replaced each time.
According to your Activity code, you need to choose the correct way, but make sure there is no fragment getting re-created without destroying previous one.
Happy Coding !!

You are adding two fragments on top of each other.
Instead of add use replace when executing the fragment transaction:
From:
getSupportFragmentManager().beginTransaction().add(R.id.container_privacy, new PrivacyFragment(), null).addToBackStack(null).commit();
if (mPrivacyContainer.getVisibility() == View.GONE) {
mPrivacyContainer.setVisibility(View.VISIBLE);
} else {
mPrivacyContainer.setVisibility(View.GONE);
}
To:
getSupportFragmentManager().beginTransaction().replace(R.id.container_privacy, new PrivacyFragment(), null).addToBackStack(null).commit();
if (mPrivacyContainer.getVisibility() == View.GONE) {
mPrivacyContainer.setVisibility(View.VISIBLE);
} else {
mPrivacyContainer.setVisibility(View.GONE);
}

This question already has answers here:
What is a stack trace, and how can I use it to debug my application errors?
(7 answers)
Closed 4 years ago.
This is the code MainActivity.java file. I think there should be no mistake in this code. But it shows the message
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference.
I don't know why it is showing up there? Please help me to figure out.
package com.example.android.practiceset2;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.*;
import android.view.*;`
public class MainActivity extends AppCompatActivity {
int score=0,wickets=0;
String value=null,number=null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
Button b1=(Button)findViewById(R.id.b_i1);//b_i1 stands for increase in 1 run taken by team B and similarly other names are to the ids of different button.
Button b2=(Button)findViewById(R.id.b_i2);
Button b3=(Button)findViewById(R.id.b_i3);
Button b4=(Button)findViewById(R.id.b_i4);
Button b6=(Button)findViewById(R.id.b_i6);
Button bw=(Button)findViewById(R.id.b_w);
Button bwide=(Button)findViewById(R.id.b_wide);
Button a1=(Button)findViewById(R.id.a_i1);
Button a2=(Button)findViewById(R.id.a_i2);
Button a3=(Button)findViewById(R.id.a_i3);
Button a4=(Button)findViewById(R.id.a_i4);
Button a6=(Button)findViewById(R.id.a_i6);
Button aw=(Button)findViewById(R.id.a_w);
Button awide=(Button)findViewById(R.id.a_wide);
TextView ta= (TextView)findViewById(R.id.a);
TextView tb= (TextView)findViewById(R.id.b);
public void aorb(View view{
if(getResources().getResourceEntryName((view.getId())).startsWith("a"))
{ value="a";}
else{value="b";}
number=getResources().getResourceEntryName((view.getId())).substring(2);
score();}
public void a_enabled(Boolean b)
{
a1.setEnabled(b);
a2.setEnabled(b);
a3.setEnabled(b);
a4.setEnabled(b);
a6.setEnabled(b);
aw.setEnabled(b);
awide.setEnabled(b);
}
public void b_enabled(Boolean b)
{
b1.setEnabled(b);
b2.setEnabled(b);
b3.setEnabled(b);
b4.setEnabled(b);
b6.setEnabled(b);
bw.setEnabled(b);
bwide.setEnabled(b);
}
public void display(String s){
if(value.equals("a"))
{
ta.setText(s);
b_enabled(false);
a_enabled(true);
}
else {
tb.setText(s);
a_enabled(false);
b_enabled(true);
}
}
public void score(){
int i=0;
if(number.equals("i1"))
i=1;
if(number.equals("i2"))
i=2;
if(number.equals("i3"))
i=3;
if(number.equals("i4"))
i=4;
if(number.equals("i6"))
i=6;
if(number.equals("wide"))
i=1;
score+=i;
if(number.equals("w"))
wickets+=1;
if(wickets==10)//if a team loses all its 10 wickets , the score is finalised and next team is invited for play
{
display(score+"/"+wickets);
if(value.equals("a"))
{
value="b";
}
else{value="a";}
score=0;
wickets=0;
display(score+"/"+wickets);
}
display(score+"/"+wickets);
}
public void reset(View view){
ta.setText("0/0");
tb.setText("0/0");
a_enabled(true);
b_enabled(true);
}}
This is the code for my content_main.xml file.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:background="#FFFFFF">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Team A"
android:textAlignment="center"
android:fontFamily="sans-serif-medium"
android:textSize="20sp"
android:textColor="#616161"
android:layout_margin="16dp"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
android:text="0/0"
android:textAlignment="center"
android:fontFamily="sans-serif-light"
android:textSize="56dp"
android:textColor="#000000"
android:id="#+id/a"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1"
android:onClick="aorb"
android:id="#+id/a_i1"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="3"
android:onClick="aorb"
android:id="#+id/a_i3"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="6"
android:onClick="aorb"
android:id="#+id/a_i6"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="2"
android:onClick="aorb"
android:id="#+id/a_i2"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="4"
android:onClick="aorb"
android:id="#+id/a_i4"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Out"
android:onClick="aorb"
android:id="#+id/a_w"
/>
</LinearLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAlignment="center"
android:layout_centerHorizontal="true"
android:text="Wide"
android:onClick="aorb"
android:id="#+id/a_wide"/>
</RelativeLayout>
</LinearLayout>
<View
android:layout_width="2dp"
android:layout_height="match_parent"
android:background="#android:color/darker_gray"></View>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Team B"
android:textAlignment="center"
android:fontFamily="sans-serif-medium"
android:textSize="20sp"
android:textColor="#616161"
android:layout_margin="16dp"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
android:text="0/0"
android:textAlignment="center"
android:fontFamily="sans-serif-light"
android:textSize="56dp"
android:textColor="#000000"
android:id="#+id/b"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1"
android:onClick="aorb"
android:id="#+id/b_i1"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="3"
android:onClick="aorb"
android:id="#+id/b_i3"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="6"
android:onClick="aorb"
android:id="#+id/b_i6"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="2"
android:onClick="aorb"
android:id="#+id/b_i2"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="4"
android:onClick="aorb"
android:id="#+id/b_i4"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Out"
android:onClick="aorb"
android:id="#+id/b_w"
/>
</LinearLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAlignment="center"
android:layout_centerHorizontal="true"
android:text="Wide"
android:onClick="aorb"
android:id="#+id/b_wide"
/>
</RelativeLayout>
</LinearLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Reset"
android:textAlignment="center"
android:layout_centerHorizontal="true"
android:onClick="reset"
android:layout_marginBottom="32dp"
/>
</RelativeLayout>
Here is the image of it should look like it is the screenshot the preview

All these findViewById must be included in your onCreate() method. You can keep the declarations out of onCreate(). Your views do not exist before setContentView(R.layout.activity_main);
I mean before onCreate() you can have Button b1;
and after setContentView(R.layout.activity_main); in onCreate() you must have b1=(Button)findViewById(R.id.b_i1);
for every view.

I have made the corrections in your and now the app is not crashing. Try using the below code snippet
MainActivity
public class MainActivity extends AppCompatActivity {
int score = 0, wickets = 0;
String value = null, number = null;
Button b1;
Button b2;
Button b3;
Button b4;
Button b6;
Button bw;
Button bwide;
Button a1;
Button a2;
Button a3;
Button a4;
Button a6;
Button aw;
Button awide;
TextView ta;
TextView tb;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.content_main);
b1 = (Button) findViewById(R.id.b_i1);//b_i1 stands for increase in 1 run taken by team B and similarly other names are to the ids of different button.
b2 = (Button) findViewById(R.id.b_i2);
b3 = (Button) findViewById(R.id.b_i3);
b4 = (Button) findViewById(R.id.b_i4);
b6 = (Button) findViewById(R.id.b_i6);
bw = (Button) findViewById(R.id.b_w);
bwide = (Button) findViewById(R.id.b_wide);
a1 = (Button) findViewById(R.id.a_i1);
a2 = (Button) findViewById(R.id.a_i2);
a3 = (Button) findViewById(R.id.a_i3);
a4 = (Button) findViewById(R.id.a_i4);
a6 = (Button) findViewById(R.id.a_i6);
aw = (Button) findViewById(R.id.a_w);
awide = (Button) findViewById(R.id.a_wide);
ta = (TextView) findViewById(R.id.a);
tb = (TextView) findViewById(R.id.b);
}
public void aorb(View view) {
if (getResources().getResourceEntryName((view.getId())).startsWith("a")) {
value = "a";
} else {
value = "b";
}
number = getResources().getResourceEntryName((view.getId())).substring(2);
score();
}
public void a_enabled(Boolean b) {
a1.setEnabled(b);
a2.setEnabled(b);
a3.setEnabled(b);
a4.setEnabled(b);
a6.setEnabled(b);
aw.setEnabled(b);
awide.setEnabled(b);
}
public void b_enabled(Boolean b) {
b1.setEnabled(b);
b2.setEnabled(b);
b3.setEnabled(b);
b4.setEnabled(b);
b6.setEnabled(b);
bw.setEnabled(b);
bwide.setEnabled(b);
}
public void display(String s) {
if (value.equals("a")) {
ta.setText(s);
b_enabled(false);
a_enabled(true);
} else {
tb.setText(s);
a_enabled(false);
b_enabled(true);
}
}
public void score() {
int i = 0;
if (number.equals("i1"))
i = 1;
if (number.equals("i2"))
i = 2;
if (number.equals("i3"))
i = 3;
if (number.equals("i4"))
i = 4;
if (number.equals("i6"))
i = 6;
if (number.equals("wide"))
i = 1;
score += i;
if (number.equals("w"))
wickets += 1;
if (wickets == 10)//if a team loses all its 10 wickets , the score is finalised and next team is invited for play
{
display(score + "/" + wickets);
if (value.equals("a")) {
value = "b";
} else {
value = "a";
}
score = 0;
wickets = 0;
display(score + "/" + wickets);
}
display(score + "/" + wickets);
}
public void reset(View view) {
ta.setText("0/0");
tb.setText("0/0");
a_enabled(true);
b_enabled(true);
}
}
content_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:fontFamily="sans-serif-medium"
android:text="Team A"
android:textAlignment="center"
android:textColor="#616161"
android:textSize="20sp" />
<TextView
android:id="#+id/a"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
android:fontFamily="sans-serif-light"
android:text="0/0"
android:textAlignment="center"
android:textColor="#000000"
android:textSize="56dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="8dp"
android:layout_weight="1"
android:orientation="vertical">
<Button
android:id="#+id/a_i1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="1" />
<Button
android:id="#+id/a_i3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="3" />
<Button
android:id="#+id/a_i6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="6" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="8dp"
android:layout_weight="1"
android:orientation="vertical">
<Button
android:id="#+id/a_i2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="2" />
<Button
android:id="#+id/a_i4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="4" />
<Button
android:id="#+id/a_w"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="Out" />
</LinearLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="#+id/a_wide"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:onClick="aorb"
android:text="Wide"
android:textAlignment="center" />
</RelativeLayout>
</LinearLayout>
<View
android:layout_width="2dp"
android:layout_height="match_parent"
android:background="#android:color/darker_gray"></View>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:fontFamily="sans-serif-medium"
android:text="Team B"
android:textAlignment="center"
android:textColor="#616161"
android:textSize="20sp" />
<TextView
android:id="#+id/b"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
android:fontFamily="sans-serif-light"
android:text="0/0"
android:textAlignment="center"
android:textColor="#000000"
android:textSize="56dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="8dp"
android:layout_weight="1"
android:orientation="vertical">
<Button
android:id="#+id/b_i1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="1" />
<Button
android:id="#+id/b_i3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="3" />
<Button
android:id="#+id/b_i6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="6" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="8dp"
android:layout_weight="1"
android:orientation="vertical">
<Button
android:id="#+id/b_i2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="2" />
<Button
android:id="#+id/b_i4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="4" />
<Button
android:id="#+id/b_w"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="aorb"
android:text="Out" />
</LinearLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="#+id/b_wide"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:onClick="aorb"
android:text="Wide"
android:textAlignment="center" />
</RelativeLayout>
</LinearLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginBottom="32dp"
android:onClick="reset"
android:text="Reset"
android:textAlignment="center" />
</RelativeLayout>
</RelativeLayout>
Hope this helps.

This question already has answers here:
Null pointer Exception - findViewById()
(12 answers)
What is a NullPointerException, and how do I fix it?
(12 answers)
Closed 7 years ago.
The error is
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RelativeLayout.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
my java is
package com.doctorfinderapp.doctorfinder;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.RelativeLayout;
public class DoctorProfileActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scrolling);
//get data from previous activity
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Invia una mail a Dottore", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
//vado sul feed
RelativeLayout feedback = (RelativeLayout) findViewById(R.id.feedback);
feedback.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(DoctorProfileActivity.this, FeedbackItemActivity.class);
startActivity(intent);
}
});
}
}
xml code where is declared the function "feedbackfunction"
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="#dimen/activity_horizontal_margin"
android:padding="#dimen/activity_horizontal_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.letsnurture.ln_202.coordinatorlayoutpart1.ScrollingActivity"
tools:showIn="#layout/activity_scrolling">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:weightSum="1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="74dp"
android:background="?attr/selectableItemBackground"
android:clickable="true"
android:padding="#dimen/activity_horizontal_margin"
android:layout_weight="0.61">
<ImageView
android:id="#+id/ivContactItem1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginEnd="#dimen/activity_horizontal_margin"
android:layout_marginRight="#dimen/activity_horizontal_margin"
android:src="#drawable/ic_account_circle_black_24dp" />
<TextView
android:id="#+id/tvNumber1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_toEndOf="#id/ivContactItem1"
android:layout_toRightOf="#id/ivContactItem1"
android:text="Lorenzo Gitto"
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#212121" />
<ToggleButton
android:id="#+id/chkState1"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:background="#drawable/ic_account_circle_white_24dp"
android:checked="true"
android:padding="6dp"
android:textOff=""
android:textOn="" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/selectableItemBackground"
android:clickable="true"
android:padding="#dimen/activity_horizontal_margin">
<ImageView
android:id="#+id/ivContactItem2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginEnd="#dimen/activity_horizontal_margin"
android:layout_marginRight="#dimen/activity_horizontal_margin"
android:src="#drawable/ic_info_black_24dp"
android:visibility="visible" />
<TextView
android:id="#+id/tvNumber2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_toEndOf="#id/ivContactItem2"
android:layout_toRightOf="#id/ivContactItem2"
android:text="Chirurgia Toracica"
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#212121" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/tvNumber2"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_marginTop="8dp"
android:layout_toEndOf="#id/ivContactItem2"
android:layout_toRightOf="#id/ivContactItem2"
android:text="Chirurgia Vascolare"
android:textAppearance="#style/TextAppearance.AppCompat.Small"
android:textColor="#727272" />
<ToggleButton
android:id="#+id/chkState2"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:background="#drawable/ic_info_white_24dp"
android:checked="false"
android:padding="6dp"
android:textOff=""
android:textOn="" />
</RelativeLayout>
<include layout="#layout/item_divider" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/selectableItemBackground"
android:clickable="true"
android:padding="#dimen/activity_horizontal_margin">
<ImageView
android:id="#+id/ivContactItem3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginEnd="#dimen/activity_horizontal_margin"
android:layout_marginRight="#dimen/activity_horizontal_margin"
android:src="#drawable/ic_book_black_24dp" />
<TextView
android:id="#+id/tvNumber3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_toEndOf="#id/ivContactItem3"
android:layout_toLeftOf="#+id/chkState3"
android:layout_toRightOf="#id/ivContactItem3"
android:layout_toStartOf="#+id/chkState3"
android:ellipsize="end"
android:maxLines="1"
android:text="Anni di esperienza: "
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#212121" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/tvNumber3"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_marginTop="8dp"
android:layout_toEndOf="#id/ivContactItem3"
android:layout_toRightOf="#id/ivContactItem3"
android:text="11"
android:textAppearance="#style/TextAppearance.AppCompat.Small"
android:textColor="#727272" />
<ToggleButton
android:id="#+id/chkState3"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:background="#drawable/ic_info_white_24dp"
android:checked="true"
android:padding="6dp"
android:textOff=""
android:textOn="" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/selectableItemBackground"
android:clickable="true"
android:padding="#dimen/activity_horizontal_margin">
<ImageView
android:id="#+id/ivContactItem4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginEnd="#dimen/activity_horizontal_margin"
android:layout_marginRight="#dimen/activity_horizontal_margin"
android:src="#drawable/ic_explore_black_24dp"
android:visibility="visible" />
<TextView
android:id="#+id/tvNumber4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_toEndOf="#id/ivContactItem4"
android:layout_toLeftOf="#+id/chkState4"
android:layout_toRightOf="#id/ivContactItem4"
android:layout_toStartOf="#+id/chkState4"
android:ellipsize="end"
android:maxLines="1"
android:text="Luogo di lavoro"
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#212121" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/tvNumber4"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_marginTop="8dp"
android:layout_toEndOf="#id/ivContactItem4"
android:layout_toRightOf="#id/ivContactItem4"
android:text="Via del Porto, 21"
android:textAppearance="#style/TextAppearance.AppCompat.Small"
android:textColor="#727272" />
<ToggleButton
android:id="#+id/chkState4"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:background="#drawable/ic_info_white_24dp"
android:padding="6dp"
android:textOff=""
android:textOn="" />
</RelativeLayout>
<include layout="#layout/item_divider" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/selectableItemBackground"
android:clickable="true"
android:onClick="feedbackfunction"
android:padding="#dimen/activity_horizontal_margin">
<ImageView
android:id="#+id/ivContactItem5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginEnd="#dimen/activity_horizontal_margin"
android:layout_marginRight="#dimen/activity_horizontal_margin"
android:src="#drawable/ic_exit_to_app_white_24dp" />
<TextView
android:id="#+id/tvNumber5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_toEndOf="#id/ivContactItem5"
android:layout_toLeftOf="#+id/chkState5"
android:layout_toRightOf="#id/ivContactItem5"
android:layout_toStartOf="#+id/chkState5"
android:ellipsize="end"
android:maxLines="1"
android:text="Punteggio Feedback"
android:clickable="true"
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#212121"
/>
<ToggleButton
android:id="#+id/chkState5"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:background="#drawable/ic_book_white_24dp"
android:checked="true"
android:padding="6dp"
android:textOff=""
android:textOn="" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/selectableItemBackground"
android:clickable="true"
android:padding="#dimen/activity_horizontal_margin">
<ImageView
android:id="#+id/ivContactItem6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginEnd="#dimen/activity_horizontal_margin"
android:layout_marginRight="#dimen/activity_horizontal_margin"
android:src="#drawable/ic_book_black_24dp"
android:visibility="visible" />
<TextView
android:id="#+id/tvNumber6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_toEndOf="#id/ivContactItem6"
android:layout_toLeftOf="#+id/chkState6"
android:layout_toRightOf="#id/ivContactItem6"
android:layout_toStartOf="#+id/chkState6"
android:ellipsize="end"
android:maxLines="1"
android:text="Ulteriori info"
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#212121" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/tvNumber6"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_marginTop="8dp"
android:layout_toEndOf="#id/ivContactItem6"
android:layout_toRightOf="#id/ivContactItem6"
android:maxLines="10"
android:text="Vai Su linkedin per vedere le mie info e competenze...http://www.linkedin.com/NomeDottore "
android:textAppearance="#style/TextAppearance.AppCompat.Small"
android:textColor="#727272" />
<ToggleButton
android:id="#+id/chkState6"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:background="#drawable/ic_exit_to_app_white_24dp"
android:padding="6dp"
android:textOff=""
android:textOn="" />
</RelativeLayout>
<include layout="#layout/item_divider" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="#dimen/activity_horizontal_margin">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Prenota appuntamento"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_horizontal_margin"
android:layout_marginTop="#dimen/activity_horizontal_margin"
android:text="Videochiama"
/>
</LinearLayout>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
Can someone help me?? Thanks to all

You don't have any RelativeLayout with id equals feedback.
RelativeLayout feedback = (RelativeLayout) findViewById(R.id.feedback);
So you feedback object is null and you can't execute onClick event on a null object
Solution
Set the RelativeLayout id = feedback

Looks like you're not setting the #id for that RelativeLayout:
android:id="#+id/feedback"

this is my code where there is an error.
i think that every its ok but i dont know where is the error
this is my code:
public class MainActivity extends Activity implements OnItemSelectedListener{
private EditText promAcum;
private EditText credCur;
private EditText sem;
private EditText num_examenes;
private EditText editText13;
private EditText editText14;
private EditText editText15;
private EditText editText16;
private EditText editText17;
private EditText editText18;
private EditText editText19;
private EditText editText20;
private EditText editText21;
private Spinner spinner1;
public String valorPromAcum;
public String valorCredCur;
public String valorSem;
public String[] numeroExamenes={"3","4","5","6"};
private final static String TAG_FRAGMENT = "TAG_FRAGMENT";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fm = getFragmentManager();
Fragment fragment = fm.findFragmentById(R.id.fragment_content);
if (fragment == null) {
FragmentTransaction ft = fm.beginTransaction();
ft.add(R.id.fragment_content, new MainFragment());
ft.commit();
}
promAcum = (EditText) findViewById(R.id.promAcum);
credCur = (EditText) findViewById(R.id.credCur);
sem = (EditText) findViewById(R.id.sem);
editText13 = (EditText)findViewById(R.id.editText13);
editText14 = (EditText)findViewById(R.id.editText14);
editText15 = (EditText)findViewById(R.id.editText15);
editText16 = (EditText)findViewById(R.id.editText16);
editText17 = (EditText)findViewById(R.id.editText17);
editText18 = (EditText)findViewById(R.id.editText18);
editText19 = (EditText)findViewById(R.id.editText19);
editText20 = (EditText)findViewById(R.id.editText20);
editText21 = (EditText)findViewById(R.id.editText21);
spinner1 = (Spinner) findViewById(R.id.spinner1);
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String> (this,android.R.layout.simple_spinner_item,numeroExamenes);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(dataAdapter);
addListenerOnSpinnerItemSelection();
}
public void addListenerOnSpinnerItemSelection(){
spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(MainActivity.this,
"On Button Click : " +
"\n" + String.valueOf(spinner1.getSelectedItem()) ,
Toast.LENGTH_LONG).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
});}
this is my xml code
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="3" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="#string/materias"
android:textSize="20sp" />
<EditText
android:id="#+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2"
android:ems="10"
android:inputType="text" >
</EditText>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="3" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="3" >
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/creditos"
android:textSize="20sp" />
<EditText
android:id="#+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="number" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="3"
android:layout_marginBottom="30sp">
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Cantidad de Examenes"
android:textSize="20sp" />
<Spinner
android:id="#+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TableRow
android:id="#+id/tableRow1"
android:layout_width="fill_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:textSize="20sp"
android:text="Examen" />
<TextView
android:id="#+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:textSize="20sp"
android:text="Nota" />
<TextView
android:id="#+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:gravity="center"
android:layout_weight="2"
android:text="%" />
</TableRow>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TableRow
android:id="#+id/tableRow2"
android:layout_width="fill_parent"
android:layout_height="match_parent">
<EditText
android:id="#+id/editText4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="text"/>
<EditText
android:id="#+id/editText5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="numberDecimal"/>
<EditText
android:id="#+id/editText6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="number"/>
</TableRow>
<TableRow
android:id="#+id/tableRow3"
android:layout_width="fill_parent"
android:layout_height="match_parent">
<EditText
android:id="#+id/editText7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="text"/>
<EditText
android:id="#+id/editText8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="numberDecimal"/>
<EditText
android:id="#+id/editText9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="number"/>
</TableRow>
<TableRow
android:id="#+id/tableRow4"
android:layout_width="fill_parent"
android:layout_height="match_parent">
<EditText
android:id="#+id/editText10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="text"/>
<EditText
android:id="#+id/editText11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="numberDecimal"/>
<EditText
android:id="#+id/editText12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="number"/>
</TableRow>
<TableRow
android:id="#+id/tableRow5"
android:layout_width="fill_parent"
android:layout_height="match_parent">
<EditText
android:id="#+id/editText13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="text"/>
<EditText
android:id="#+id/editText14"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="numberDecimal"/>
<EditText
android:id="#+id/editText15"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="number"/>
</TableRow>
<TableRow
android:id="#+id/tableRow6"
android:layout_width="fill_parent"
android:layout_height="match_parent">
<EditText
android:id="#+id/editText16"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="text"/>
<EditText
android:id="#+id/editText17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="numberDecimal"/>
<EditText
android:id="#+id/editText18"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="number"/>
</TableRow>
<TableRow
android:id="#+id/tableRow7"
android:layout_width="fill_parent"
android:layout_height="match_parent">
<EditText
android:id="#+id/editText19"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="text"/>
<EditText
android:id="#+id/editText20"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="numberDecimal"/>
<EditText
android:id="#+id/editText21"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="number" />
</TableRow>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="3" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/guardar" />
<Button
android:id="#+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2"
android:onClick="agregarNotas"
android:text="#string/materias" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="3"
android:text="#string/nueva" />
</LinearLayout>
logcat error line 78 : spinner1.setadapter(adapter);
enter code here09-03 11:25:46.344: E/AndroidRuntime(7841): Caused by: java.lang.NullPointerException
09-03 11:25:46.344: E/AndroidRuntime(7841): at com.jonathanar.promapp.MainActivity.onCreate(MainActivity.java:78)
any suggestions are appreciated

You are trying to retrieve Views from Activity, but they are in Fragment.
getActivity().findViewById(R.id.yourId); is what you should do whenever you are using findViewById() method.

The NullPointerException is not a problem with instantiating your adapter, but rather with the way you are getting the Spinner.
If the spinner exists in the fragment you need to specify its context as so.
just putting findViewById() is really this.findViewById(), where this is your activity. In other words your telling the method to find views in the content view of the activity.
If the spinner is in the content view of the fragment, you need to instead use
fragment.getActivity().findViewById(R.id.???);
this way findViewById() knows to find your spinner in the context of the fragment.
Hope this helps!

Strangely, my listView's onClick no longer works after I added two Buttons: Submit and Show Result.
Here is the list view xml.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context=".CulturalActivity"
android:background="#EFEFEF"
android:id="#+id/AdLayout"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="2dp"
android:layout_marginBottom="3dp"
>
<ListView
android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:clickable="true"
android:divider="#android:color/transparent"
android:descendantFocusability="blocksDescendants"
android:scrollbars="none"
android:dividerHeight="10dp"
android:listSelector="#drawable/list_selector" />
</RelativeLayout>
Here is the layout of each list row:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="315dp"
android:clickable="true"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="7dp"
android:background="#drawable/bg_card"
android:orientation="horizontal"
android:padding="5dip" >
<RelativeLayout
android:id="#+id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_marginLeft="-60dp"
android:background="#2093CD"
android:gravity="center_horizontal" >
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="52dp"
android:text="Audit"
android:textColor="#android:color/white"
android:textSize="20sp"
android:textStyle="bold" />
</RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/relativeLayout2" />
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Farm/Grp"
android:textColor="#000000"
android:typeface="sans"
android:textSize="17sp"
android:textStyle="bold"
android:layout_alignTop="#+id/tile"
android:layout_toRightOf="#+id/textView4" />
<!--thumbnail-->
<LinearLayout
android:layout_width="80dp"
android:layout_height="80dp"
android:background="#drawable/thumbnail_image"
android:layout_marginTop="35dp"
android:gravity="center"
android:id="#+id/tile">
<ImageView
android:id="#+id/thumbImage"
android:layout_width="50dp"
android:clickable="false"
android:layout_height="50dp"
android:src="#drawable/opened" />
</LinearLayout>
<TextView
android:id="#+id/crophead"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Crop"
android:textColor="#000000"
android:typeface="sans"
android:textSize="17sp"
android:textStyle="bold"
android:layout_alignBottom="#+id/tile"
android:layout_alignLeft="#+id/title" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Certification"
android:textColor="#000000"
android:typeface="sans"
android:textSize="17sp"
android:textStyle="bold"
android:layout_marginTop="10dp"
android:layout_below="#+id/textView4"
android:layout_alignParentLeft="true" />
<TextView
android:id="#+id/certification"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/textView2"
android:layout_marginLeft="22dp"
android:layout_toRightOf="#+id/title"
android:text="Test"
android:textColor="#343434"
android:textSize="17sp" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Audit Type"
android:textColor="#000000"
android:typeface="sans"
android:textSize="17sp"
android:textStyle="bold"
android:layout_below="#+id/tile"
android:layout_alignLeft="#+id/textView2"
android:layout_marginTop="20dp" />
<TextView
android:id="#+id/audittype"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/textView2"
android:layout_alignLeft="#+id/certification"
android:maxLines="2"
android:text="ES"
android:textColor="#343434"
android:textSize="17sp" />
<View
android:layout_width="fill_parent"
android:layout_height="3px"
android:layout_marginTop="200dp"
android:background="#21265b"
android:id="#+id/view" />
<TextView
android:id="#+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Start Date"
android:textColor="#000000"
android:typeface="sans"
android:textSize="17sp"
android:textStyle="bold"
android:layout_below="#+id/view"
android:layout_alignLeft="#+id/view"
android:layout_marginLeft="5dp"
android:layout_marginTop="5dp"
android:layout_alignParentBottom="false" />
<TextView
android:id="#+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="End Date"
android:textColor="#000000"
android:typeface="sans"
android:textSize="17sp"
android:textStyle="bold"
android:layout_marginRight="15dp"
android:layout_alignTop="#+id/textView6"
android:layout_alignRight="#+id/startdate" />
<TextView
android:id="#+id/startdate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#8B1A1A"
android:text="30/05/1992"
android:textSize="17sp"
android:layout_alignTop="#+id/enddate"
android:layout_toRightOf="#+id/relativeLayout2"
android:layout_marginLeft="6dp"
android:layout_alignParentBottom="false" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#8B1A1A"
android:text="2/13/14"
android:textSize="17sp"
android:id="#+id/enddate"
android:layout_below="#+id/textView7"
android:layout_alignRight="#+id/textView7" />
<TextView
android:id="#+id/farm"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/audittype"
android:maxLines="3"
android:layout_alignTop="#+id/title"
android:text="Tea Estate Nagarcoil Tamil Nadu, India "
android:textColor="#343434"
android:textSize="17sp" />
<TextView
android:id="#+id/crop"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/farm"
android:layout_alignTop="#+id/crophead"
android:maxLines="2"
android:text="Wheat without its chaff and barn but not brown"
android:textColor="#343434"
android:textSize="17sp" />
<Button
android:id="#+id/upsync"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:background="#drawable/blue_thumb"
android:layout_below="#+id/enddate"
android:focusable="false"
android:focusableInTouchMode="false"
android:text="Show Results"
android:textColor="#android:color/white" />
<Button
android:id="#+id/submit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:layout_alignParentBottom="true"
android:layout_toLeftOf="#+id/upsync"
android:focusable="false"
android:focusableInTouchMode="false"
android:layout_below="#+id/enddate"
android:background="#drawable/blue_thumb"
android:text="Submit"
android:textColor="#android:color/white" />
</RelativeLayout>
Here is the click snippet of the list view:
listview.setOnItemClickListener( new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View view,
int position, long id) {
long audit_id;
try{
audit_id = (new CustomListAdapter(HomeList.this, c).getAuditID(position));
changeTileStatus(audit_id,"opened");
System.out.println("listClicked");
sendAuditAndIntent(audit_id);
}catch(Exception e)
{
System.out.println("ERROR # HOMELIST list onClick: "+e);
}
}
private void sendAuditAndIntent(long audit_id) { //sends audit id and api key
Intent intent = new Intent(HomeList.this,ChapterActivity.class );
Bundle extras= new Bundle();
extras.putString("audit_id",String.valueOf(audit_id));
extras.putString("api_key", api_key);
intent.putExtras(extras);
startActivity(intent);
}
private void changeTileStatus(long audit_id, String value) {
AuditTableManager tile= new AuditTableManager(HomeList.this);
tile.open();
tile.updateEntry(audit_id, value);
tile.close();
}
});

OnItemClickListener is not called if cells contain clickable Views. It is an Android feature. You can handle clicks by OnClickListener then - set it to your two buttons (not the listView itself).
In your adapter:
public View onCreateView(..., final int position){
...
convertView.findViewById(R.id.button1).setOnClickListener(new OnClickListener(){
public void onClick(View view){
itemClickedAction1(position);
}
});
convertView.findViewById(R.id.button2).setOnClickListener(new OnClickListener(){
public void onClick(View view){
itemClickedAction2(position);
}
});
...
}

Try android:Focusable="false" and also android:clickable="false" in the custom row TextView