I'm new to android and i'm trying to call a method that moves a circle drawn by a custom view using canvas up by 10 pixels. When i try to call said method, i get a null pointer exception and i can't figure out why. Here is what i have.
Main Activity
public class CustomView extends Activity {
XView xv;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_customview);
}
public void moveUp(View view){
xv.setY(view);
}
}
The Custom View
public class XView extends View implements View.OnClickListener{
private Paint mPaint = new Paint();
int oX = 200;
int oY = 200;
public XView(Context context, AttributeSet attrs){
super(context, attrs);
//setOnClickListener(this);
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
mPaint.setStyle(Paint.Style.FILL);
mPaint.setColor(Color.MAGENTA);
canvas.drawColor(Color.WHITE);
canvas.drawCircle(oX, oY, 50, mPaint);
}
public void onClick(View view){
oX=oX+10;
view.postInvalidate();
}
public void setY(View view)
{
oY=oY+10;
view.postInvalidate();
}
}
The XML for the main activity
<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:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".customview"
android:orientation="vertical">
<com.mycompany.customview.XView
android:layout_width="wrap_content"
android:layout_height="200dp" />
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_alignParentTop="true"
android:layout_alignLeft="#+id/button2"
android:layout_alignStart="#+id/button2"
android:onClick="moveUp"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_alignTop="#+id/button2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/button"
android:layout_centerHorizontal="true"
android:id="#+id/button2" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:id="#+id/button" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:id="#+id/button5"
android:layout_alignParentBottom="true"
android:layout_alignLeft="#+id/button2"
android:layout_alignStart="#+id/button2" />
</RelativeLayout>
Thanks
you need to add an id to your custom view in your xml:
<com.mycompany.customview.XView
android:id="#+id/xvview_id"
android:layout_width="wrap_content"
android:layout_height="200dp" />
and use findViewById to initialize your member
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_customview);
xv = (XView) findViewById(R.id.xvview_id);
}
When you call setContentView, Android "adds", the widgets that you declared in your layout as part of the Activity's view hierarchy, making them available for you in the context of the current activity. What you have to do is just call findViewById to grab a reference to the widget you want to work with
Related
I'm trying to create a form to capture data, I need to access the camera to take pictures. My problem is when I try to call the camera with imagenButton, it's not working but the code doesn't show any error.
Here's my fragment to declare form:
public class EspecimenesInsertarFragment extends Fragment implements
Response.Listener<JSONObject>, Response.ErrorListener {
private EspecimenesViewModel especimenesViewModel;
RequestQueue rq;
JsonRequest jrq;
final int COD_SELECCIONA=10;
final int COD_FOTO=20;
private static final int REQUEST_IMAGE_CAMERA=101;
private static final int REQUEST_PERMISSION_CAMERA=101;
Button btnGuardar, btnCancelar;
ImageButton btnCamara, btnGaleria;
ImageView imageView;
public static final int MY_DEFAULT_TIMEOUT = 50000;
public EspecimenesInsertarFragment() {
// Required empty public constructor
}
public static EspecimenesInsertarFragment newInstance() { return new EspecimenesInsertarFragment();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view;
view = inflater.inflate(R.layout.fragment_colecciones_insertar, container, false);
imageView = (ImageView)view.findViewById(R.id.imageView);
btnCamara=(ImageButton) view.findViewById(R.id.tomarFoto);
btnGuardar = (Button) view.findViewById(R.id.buttonIngresarEspecimenes);
rq = Volley.newRequestQueue(getContext());
/* if(validaPermisos()){
btnCamara.setEnabled(true);
}else{
btnCamara.setEnabled(false);
} */
if (ContextCompat.checkSelfPermission(getContext(), WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(getActivity(), new String[]{WRITE_EXTERNAL_STORAGE,
Manifest.permission.CAMERA}, 1000);
}
btnGuardar.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
registrar_especimen("http://localhost/BIO-UES-APP/EspecimenesController.php");
}
});
static final int REQUEST_TAKE_PHOTO=1;
public void tomarFoto(View view){
Intent takePictureInent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
Log.d("entra","");
if(takePictureInent.resolveActivity(getActivity().getPackageManager())!= null){
File photoFile=null;
try {
photoFile=createImageFile();
}catch (IOException ex){
}
if(photoFile!=null){
Uri photoUri=FileProvider.getUriForFile(getActivity(),"com.example.luvin.drawercero",photoFile);
takePictureInent.putExtra(MediaStore.EXTRA_OUTPUT,photoUri);
getActivity().startActivityForResult(takePictureInent,REQUEST_TAKE_PHOTO);
}
}
}
And this is my XML layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context=".Especimenes.EspecimenesConsultarFragment">
<!-- TODO: Update blank fragment layout -->
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_centerVertical="true"
android:layout_marginStart="5dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="0dp"
android:layout_marginEnd="-7dp"
android:layout_marginRight="-7dp"
android:layout_marginBottom="9dp"
tools:layout_editor_absoluteX="393dp"
tools:layout_editor_absoluteY="79dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<ImageButton
android:id="#+id/tomarFoto"
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginStart="100dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="24dp"
android:layout_marginRight="24dp"
android:clickable="true"
android:src="#android:drawable/ic_menu_camera" />
<ImageButton
android:id="#+id/seleccionarDesdeGaleria"
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginStart="200dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="24dp"
android:layout_marginRight="24dp"
android:src="#android:drawable/ic_menu_gallery" />
</FrameLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="88dp"
android:orientation="vertical">
<Button
android:id="#+id/buttonCancelarEspecimenes"
android:layout_width="129dp"
android:layout_height="41dp"
android:layout_toRightOf="#+id/buttonIngresar"
android:backgroundTint="#96A6A8"
android:gravity="center|left"
android:text="CANCELAR"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.783"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.659" />
<Button
android:id="#+id/buttonIngresarEspecimenes"
android:layout_width="129dp"
android:layout_height="41dp"
android:layout_marginStart="68dp"
android:text="INGRESAR"
app:backgroundTint="#00BCD4"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/buttonCancelar"
app:layout_constraintHorizontal_bias="0.85"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.659" />
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
</ScrollView>
Logcat message when button is pressed:
com.example.luvin.drawercero D/ViewRootImpl#6731d38[MainActivity]: ViewPostIme pointer 1
To complete my question, I have the permissions in the manifest. I already tried to call the camera in another way, tried creating the method in the MainActivity to create the OnClick event in the XML Layout, but nothing works.
If anyone knows how to solve this issue please help.
Thanks.
You forgot to add the on click listener to your photo button. This should solve your problem:
btnCamara = view.findViewById(R.id.tomarFoto);
btnCamera.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
tomarFoto(v);
}
});
The textinputlayout I created is for a login screen, but whenever the activity is launched, everything else shows except for that. Clicking on the space where it should be also does nothing (the keyboard does not come up) so it seems like its visibility has been set to "gone" even though it has not.
Layout file:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:id="#+id/rootView"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="org.thelatinschool.canvasgrades.SplashScreenActivity">
<ImageView
android:id="#+id/logo"
android:layout_width="75dp"
android:layout_height="75dp"
android:layout_centerInParent="true"
android:contentDescription="#null"
android:src="#mipmap/ic_launcher_round"
android:visibility="visible" />
<ProgressBar
android:id="#+id/loadingProgressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="12dp"
android:layout_alignParentBottom="true"
android:layout_marginBottom="-4dp"
android:foregroundGravity="bottom"
android:indeterminate="true"
android:padding="0dp"
android:theme="#style/ProgressBarStyle"
android:visibility="visible" />
<RelativeLayout
android:id="#+id/afterAnimationView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginStart="20dp"
android:layout_marginTop="130dp"
android:layout_marginEnd="20dp"
android:orientation="vertical"
android:visibility="visible">
<TextView
android:id="#+id/WelcomeTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Highlands Latin School"
android:textColor="#color/colorPrimary"
android:textSize="25sp"
android:textStyle="bold" />
<TextView
android:id="#+id/readItTogetherTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/WelcomeTextView"
android:layout_marginTop="10dp"
android:text="Canvas Grades"
android:textColor="#color/colorAccent"
android:textSize="15sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/loginButton"
android:layout_below="#+id/readItTogetherTextView"
android:gravity="center"
android:orientation="vertical">
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/emailEditText"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="Email"
android:textColor="#color/colorPrimary"
android:textColorHint="#color/colorAccent"
android:textSize="15sp"
app:boxBackgroundMode="outline" />
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/passwordEditText"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_marginTop="25dp"
android:hint="Password"
android:textColor="#color/colorPrimary"
android:textColorHint="#color/colorAccent"
android:textSize="15sp"
app:boxStrokeColor="#000000" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:padding="5dp">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|center_vertical"
android:background="#FFFFFF"
android:text="Forgot Password?"
android:textColor="#color/colorAccent"
android:textSize="14sp"
android:textStyle="bold" />
</FrameLayout>
</LinearLayout>
<Button
android:id="#+id/loginButton"
android:layout_width="match_parent"
android:layout_height="55dp"
android:layout_above="#+id/skipTextView"
android:layout_marginBottom="5dp"
android:background="#drawable/button_drawable"
android:text="Login"
android:textAllCaps="false"
android:textColor="#FFFFFF"
android:textSize="16sp" />
<TextView
android:id="#+id/skipTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="10dp"
android:background="?android:attr/selectableItemBackground"
android:clickable="true"
android:focusable="true"
android:gravity="center"
android:padding="12dp"
android:text="Incorrect username or password!"
android:textColor="#B53737"
android:textSize="15sp"
android:visibility="invisible" />
</RelativeLayout>
</RelativeLayout>
And the corresponding java:
public class SplashScreenActivity extends AppCompatActivity {
public String theme1;
private ProgressDialog progressDialog;
private boolean animationStarted = false;
private ImageView bookIconImageView;
private TextView bookITextView;
private ProgressBar loadingProgressBar;
int progress;
private RelativeLayout rootView, afterAnimationView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash_activity);
bookIconImageView = findViewById(R.id.logo);
loadingProgressBar = (ProgressBar)findViewById(R.id.loadingProgressBar);
rootView = findViewById(R.id.rootView);
afterAnimationView = findViewById(R.id.afterAnimationView);
Thread thred = new Thread(new Runnable() {
#Override
public void run() {
doWork();
startApp();
}
public void doWork() {
for (progress=10;progress<100;progress=progress+10){
try {
Thread.sleep(350);
loadingProgressBar.setProgress(progress);
} catch (InterruptedException e) {
e.printStackTrace();
}} }
public void startApp(){
runOnUiThread(new Runnable() {
#Override
public void run() {
loadingProgressBar.setVisibility(GONE);
rootView.setBackgroundColor(ContextCompat.getColor(SplashScreenActivity.this, R.color.splashscreen));
bookIconImageView.setImageResource(R.mipmap.ic_launcher_round);
}
});
startAnimation();
};
});
thred.start();
}
private void startAnimation() {
ViewPropertyAnimator viewPropertyAnimator = bookIconImageView.animate();
viewPropertyAnimator.x(50f);
viewPropertyAnimator.y(100f);
viewPropertyAnimator.setDuration(1000);
viewPropertyAnimator.setListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animation) {
}
#Override
public void onAnimationEnd(Animator animation) {
afterAnimationView.setVisibility(VISIBLE);
}
#Override
public void onAnimationCancel(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
});
}
// Intent myIntent = new Intent(SplashScreenActivity.this, MainActivity.class);
// SplashScreenActivity.this.startActivity(myIntent);
}
I have an animation for the splash screen that displays right before the login screen, I haven't touched anything to do with the text input box in java but maybe I made a mistake somewhere there.
Most probably you miss adding app level material design dependency
// material Design support library - androidx
implementation 'com.google.android.material:material:1.0.0'
// material Design support library - support library
implementation 'com.android.support:design:28.0.0'
UPDATE
You're missing adding TextInputEditText within TextInputLayout, so you won't expect to see something, also move android:hint, android:textSize, android:textColorHint & android:textColor attributes into TextInputEditText instead of TextInputLayout
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/emailEditText"
android:layout_width="match_parent"
android:layout_height="50dp"
app:boxBackgroundMode="outline">
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/et_email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Email"
android:inputType="textEmailAddress"
android:textColor="#color/colorPrimary"
android:textColorHint="#color/colorAccent"
android:textSize="15sp" />
</com.google.android.material.textfield.TextInputLayout>
I want load some Custom Views within my RelativeLayout but don't know how. The code I've tried doesn't work hence does anyone know how to do this correctly?
XML
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin">
<TextView
android:id="#+id/textView0"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_marginBottom="20dp"
style="#android:style/TextAppearance.Medium" />
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_marginBottom="2dp"
style="#android:style/TextAppearance.Medium"
android:layout_below="#id/textView0" />
<View
android:id="#+id/drawing0"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_below="#id/textView1" />
<View
android:id="#+id/drawing1"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginTop="2dp"
android:layout_below="#id/drawing0" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#android:style/TextAppearance.Large"
android:layout_below="#id/drawing1" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#android:style/TextAppearance.Large"
android:layout_marginStart="10dp"
android:layout_below="#id/drawing1"
android:layout_toEndOf="#id/textView2" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#android:style/TextAppearance.Medium"
android:layout_below="#id/textView3" />
<TextView
android:id="#+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#android:style/TextAppearance.Medium"
android:layout_marginBottom="30dp"
android:layout_below="#id/textView4" />
</RelativeLayout>
</ScrollView>
Shapes.java
public class Shapes extends android.support.v4.app.Fragment {
public Shapes() {
}
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.shapes, container, false);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
View v = getView();
assert v != null;
//blue shape drawing
View cv0 = (View)v.findViewById(R.id.drawing0);
v.addView(new BlueShape(getActivity()));
//green shape drawing
View cv1 = (View)v.findViewById(R.id.drawing1);
v.addView(new GreenShape(getActivity()));
super.onActivityCreated(savedInstanceState);
}
}
BlueShape.java
public class BlueShape extends View {
private final Paint mBlue = new Paint();
...
}
GreenShape.java
public class GreenShape extends View {
private final Paint mGreen = new Paint();
...
}
refer to https://developer.android.com/guide/topics/ui/custom-components.html
specifically under
Modifying an Existing View Type
Use the Custom Component
you can change the xml in your RelativeLayout
<View...
to
<your.package.GreenShape...
if you do not know beforehand what the View is going to be, then change it to
<FrameLayout... instead of <View...
and then add the child (GreenShape or BlueShape) programmatically to that Frame layout
cv0, cv1 are not ViewGroup.
Try to change cv0, cv1 to ViewGroup and move onActivityCreated's code to onViewCreated callback method.
here is reference site.
android/view/ViewGroup
I think that the problem is that you are using v.addView() instead of
cv0.addView()
But I would suggest to use the following instead of your View:
<LinearLayout
android:id="#+id/drawing1"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginTop="2dp"
android:layout_below="#id/drawing0" />
then, inside the Java code:
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
LinearLayout cv0 = (LinearLayout)getView().findViewById(R.id.drawing0);
cv0.addView(new BlueShape(getActivity()), 0, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
I am learning Java and Android SDK. I want to create a simple application that is swapping 2 buttons so the left one is moving to the place of right one and v.v. with simple animation. I have tried the ObjectAnimator because I have read that it is moving the views objects permanently. But it's not :-( The objects stays there I mean the left one on the right and v.v. but their getLeft(), getTop() values are the same, and after next animations starts the objects are returning to the start position immediately. I have read that the ObjectAnimator needs some additional function to work properly but in the documentation there is no example :-( I have tried to add the setTranslationX function but it hasn't worked. Could somebody provide me with some simple example of how to do this?
http://developer.android.com/guide/topics/graphics/prop-animation.html#object-animator
"The object property that you are animating must have a setter function (in camel case) in the form of set(). Because the ObjectAnimator automatically updates the property during animation, it must be able to access the property with this setter method. For example, if the property name is foo, you need to have a setFoo() method. If this setter method does not exist, you have three options:
Add the setter method to the class if you have the rights to do so.
Use a wrapper class that you have rights to change and have that wrapper receive the value with a valid setter method and forward it to the original object.
Use ValueAnimator instead."
Thanks in advance.
try this code:
public class ActivityStartup extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle("hello");
setContentView(R.layout.main);
SlidingMenu menu = new SlidingMenu(this);
menu.setMode(SlidingMenu.SLIDING_WINDOW);
menu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
menu.setBehindOffset(100);
menu.setFadeDegree(0.35f);
menu.attachToActivity(this, SlidingMenu.SLIDING_CONTENT);
View view = G.layoutInflater.inflate(R.layout.menu, null);
view.findViewById(R.id.layout_crop).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(G.context, "Crop Clicked", Toast.LENGTH_SHORT).show();
}
});
view.findViewById(R.id.img_logo).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent browserIntent = new Intent("android.intent.action.VIEW", Uri.parse("http://example.com"));
startActivity(browserIntent);
}
});
menu.setMenu(view);
}
}
public class G extends Application {
public static LayoutInflater layoutInflater;
public static Context context;
#Override
public void onCreate() {
super.onCreate();
layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
context = getApplicationContext();
}
}
main.xml is:
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello" />
menu.xml is:
<ImageView
android:id="#+id/img_logo"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="8dip"
android:scaleType="centerInside"
android:src="#drawable/hlogo" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="fill_parent"
android:layout_height="2dip"
android:background="#00ff00"
android:src="#drawable/ic_launcher" />
<LinearLayout
android:id="#+id/layout_crop"
android:layout_width="match_parent"
android:layout_height="48dip"
android:gravity="center_vertical" >
<ImageView
android:id="#+id/ImageView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dip"
android:scaleType="centerInside"
android:src="#android:drawable/ic_menu_crop" />
<TextView
android:id="#+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Crop"
android:textColor="#000000" />
</LinearLayout>
<LinearLayout
android:id="#+id/layout_day"
android:layout_width="match_parent"
android:layout_height="48dip"
android:gravity="center_vertical" >
<ImageView
android:id="#+id/ImageView02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dip"
android:scaleType="centerInside"
android:src="#android:drawable/ic_menu_day" />
<TextView
android:id="#+id/TextView02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Day"
android:textColor="#000000" />
</LinearLayout>
<LinearLayout
android:id="#+id/layout_delete"
android:layout_width="match_parent"
android:layout_height="48dip"
android:gravity="center_vertical" >
<ImageView
android:id="#+id/ImageView03"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dip"
android:scaleType="centerInside"
android:src="#android:drawable/ic_menu_delete" />
<TextView
android:id="#+id/TextView03"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Delete"
android:textColor="#000000" />
</LinearLayout>
Here is the XML for the layout in which I want my custom view to appear.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:rs="http://schemas.android.com/apk/res/com.bookcessed.booksearch"
android:id="#+id/widget273"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView
android:id="#+id/csp_tv_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Choose Your Source"
android:textSize="40sp"
android:textColor="#ffc83200"
android:gravity="center"
android:paddingTop="15dip"
android:paddingBottom="75dip"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<com.bookcessed.booksearch.SearchProviderButton
android:id="#+id/csp_spb_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_below="#+id/csp_tv_title"
rs:providerName="BOOKP" />
</RelativeLayout>
Here is the custom view's XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:rs="http://schemas.android.com/apk/res/com.bookcessed.booksearch"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<RelativeLayout
android:id="#+id/pv_rl_strings"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_alignParentTop="true" >
<TextView
android:id="#+id/pv_tv_search"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Search"
android:layout_toRightOf="#+id/pv_tv_and"
android:textSize="18sp"
android:textColor="#ff11ab37"
android:layout_alignParentTop="true" />
<TextView
android:id="#+id/pv_tv_and"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" and "
android:textSize="18sp"
android:paddingLeft="6dip"
android:paddingRight="6dip"
android:textColor="#ff000000"
android:layout_centerHorizontal="true" />
<TextView
android:id="#+id/pv_tv_browse"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Browse"
android:textSize="18sp"
android:textColor="#ff0077bb"
android:layout_alignParentTop="true"
android:layout_toLeftOf="#+id/pv_tv_and" />
<ImageView
android:id="#+id/pv_logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/pv_tv_search"
android:layout_centerInParent="true"
android:layout_alignTop="#+id/pv_tv_and"
android:src="#drawable/bookp_logo" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/pv_rl_genres"
android:layout_width="wrap_content"
android:layout_below="#+id/pv_rl_strings"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true" >
<ImageView
android:id="#+id/pv_genre1"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true" />
<ImageView
android:id="#+id/pv_genre2"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/pv_genre1" />
<ImageView
android:id="#+id/pv_genre3"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/pv_genre2" />
<ImageView
android:id="#+id/pv_genre4"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/pv_genre3" />
<ImageView
android:id="#+id/pv_genre5"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/pv_genre4" />
<ImageView
android:id="#+id/pv_genre6"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/pv_genre5" />
<ImageView
android:id="#+id/pv_genre7"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/pv_genre6" />
<ImageView
android:id="#+id/pv_genre8"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/pv_genre7" />
<ImageView
android:id="#+id/pv_genre9"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/pv_genre8" />
</RelativeLayout>
</RelativeLayout>
Here is the class SearchProviderButton:
public class SearchProviderButton extends LinearLayout {
private Connector connector;
private Context context;
private View inflatedView;
public SearchProviderButton(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = getContext().obtainStyledAttributes(attrs,R.styleable.SearchProviderButton);
connector = SearchProvider.valueOf(a.getString(R.styleable.SearchProviderButton_providerName)).getConnector();
this.context = context;
setFocusable(true);
setBackgroundColor(Color.WHITE);
setVisibility(VISIBLE);
//setOnClickListener(listenerAdapter);
setClickable(true);
}
#Override
protected void onFinishInflate() {
super.onFinishInflate();
LayoutInflater li = LayoutInflater.from(context);
inflatedView = li.inflate(R.layout.provider_view, null);
ImageView logo = (ImageView)inflatedView.findViewById(R.id.pv_logo);
logo.setImageResource(connector.getLogoDrawableID());
TextView searchTV = (TextView)inflatedView.findViewById(R.id.pv_tv_search);
TextView andTV = (TextView)inflatedView.findViewById(R.id.pv_tv_and);
if(!connector.isSearchSupported()){
andTV.setText("");
searchTV.setVisibility(GONE);
}
setgenreIcons();
}
public Connector getConnector(){
return connector;
}
public void setConnector(Connector connector){
this.connector = connector;
}
private void setgenreIcons(){
int[] genreIconDrawables = {R.id.pv_genre1,R.id.pv_genre2, R.id.pv_genre3,
R.id.pv_genre4, R.id.pv_genre5, R.id.pv_genre6, R.id.pv_genre7,
R.id.pv_genre8, R.id.pv_genre9};
ArrayList<Genre> availgenre = connector.getAvailablegenres();
availgenre.remove(Genre.ALL);
int counter = 0;
for(int genreIVid : genreIconDrawables){
ImageView curgenreImageView = (ImageView)inflatedView.findViewById(genreIVid);
if(counter < availgenre.size() - 1){
curgenreImageView.setImageResource(availgenre.get(counter).getDrawable());
} else {
curgenreImageView.setVisibility(GONE);
}
counter++;
}
}
protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
if (gainFocus == true){
this.setBackgroundColor(Color.rgb(255, 165, 0));
} else {
this.setBackgroundColor(Color.WHITE);
}
}
}
Here is the code for the class loading the xml that contains my custom component:
bookPServiceProviderButton = (SearchProviderButton)findViewById(R.id.csp_spb_1);
bookPServiceProviderButton.setOnClickListener(SPBOnClickListener);
bookPServiceProviderButton.setConnector(new bookPConnector());
bookPServiceProviderButton.setVisibility(View.VISIBLE);
EDIT: After the first comment, I added this code:
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int widthSpec = MeasureSpec.getMode(widthMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int heightSpec = MeasureSpec.getMode(heightMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
setMeasuredDimension(width, height);
}
Now it has a width and a height, but nothing is showing up inside of it!
Your custom layout view is not appearing because you're not putting anything into it. In your onFinishInflate you have the line inflatedView = li.inflate(R.layout.provider_view, null); But you don't add that to your view. You have two options to add the views to your custom layout view.
Change your custom view to extend RelativeLayout, change the enclosing RelativeLayout to <merge> in your provider_view.xml, and fix your findViewId lines in to this.findViewId(...) since the views will be inflated into your layout.
In your layout xml do:
<com.bookcessed.booksearch.SearchProviderButton
android:id="#+id/csp_spb_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_below="#+id/csp_tv_title"
rs:providerName="BOOKP">
<!-- include this so it's added to your custom layout view -->
<include layout="#layout/provider_view" />
</com.bookcessed.booksearch.SearchProviderButton>
provider_view becomes:
<?xml version="1.0" encoding="utf-8"?>
<merge
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:rs="http://schemas.android.com/apk/res/com.bookcessed.booksearch"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<RelativeLayout
android:id="#+id/pv_rl_strings"
.
.
.
</merge>
SearchProviderButton:
public class SearchProviderButton extends RelativeLayout{
.
.
.
#Override
protected void onFinishInflate() {
super.onFinishInflate();
//the <include> in the layout file has added these views to this
//so search this for the views
ImageView logo = this.findViewById(R.id.pv_logo);
logo.setImageResource(connector.getLogoDrawableID());
TextView searchTV = (TextView)this.findViewById(R.id.pv_tv_search);
TextView andTV = (TextView)this.findViewById(R.id.pv_tv_and);
if(!connector.isSearchSupported()){
andTV.setText("");
searchTV.setVisibility(GONE);
}
setgenreIcons();
}
.
.
.
Or you could properly inflate the view in onCreate by layoutInflater.inflate(R.layout.provider_view, this, true). That call will inflate the referenced layout into the passed ViewGroup, in this case your custom view, and add the inflated Views to it. Then you can fix up the findViewId calls in your onFinishInflate.
TC... Sometimes it wont show in the preview unless you run it.
For wrap_content to work, you need to properly implement the measure and layout functions for your custom View. See How Android Draws Views for details on what these methods mean.
My guess would be that getMeasureWidth() and getMeasureHeight() functions for your view are always returning 0.