I am using viewPager and fragments to develop an application . In one screen I use DialogFragmentto display an alert message .
My DialogFragment code is below,
public class ErrorFragment extends DialogFragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.error_fragment, container, false);
getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);
getDialog().getWindow().setLayout(350,300);
Button button=(Button)rootView.findViewById(R.id.yesButton);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d("Print -"," Ok");
if(getActivity()!=null){
Log.d("Print -"," Ok2");
((LoginActivity)getActivity()).setCurrentItem(4);
Log.d("Print -", " Ok4");
}
Log.d("Print -"," Ok3");
dismiss();
}
});
return rootView;
}
#Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if(isVisibleToUser) {
Activity a = getActivity();
if(a != null) a.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
}
}
In my button action , I have program to open another fragment however nothing is happening except DialogFragment getting closed.
Below is my layout,
<?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="#drawable/button_border">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/errorContent"
android:id="#+id/errorTextView1"
android:textSize="20dp"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:paddingTop="10dp"
android:paddingBottom="30dp"
android:textAlignment="center"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Space
android:layout_width="match_parent"
android:layout_height="36px"
android:layout_below="#id/errorTextView1"
android:id="#+id/space4"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/button_border_2"
android:id="#+id/yesButton"
android:text=" Yes "
android:layout_below="#+id/space4"
android:textColor="#android:color/white"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:textSize="20dp"
android:layout_marginLeft="46dp"
android:layout_marginStart="46dp"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/button_border_2"
android:id="#+id/noButton"
android:text=" No "
android:layout_below="#+id/space4"
android:textColor="#android:color/white"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:textSize="20dp"
android:layout_marginRight="46dp"
android:layout_marginEnd="46dp"
android:layout_alignTop="#+id/yesButton"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<Space
android:layout_width="match_parent"
android:layout_height="36px"
android:layout_below="#id/noButton"/>
</RelativeLayout>
How can I open other fragment by clicking particular button in DialogFragment ?
Even though fragment shifting is not happening the console print inside the button action is getting printed.
Related
I have a nav fragment section called GroupbookFragment which uses a TabLayout with 3 Tabs.
(GroupbookKrippeFragment, GroupbookHafenFragment & GroupbookKindergartenFragment)
Each Tab has a CardView with a RecyclerView in it. The goal is to have a global "Add Child" Button on the GroupbookFragment level, which forward you to another activity with a form where you can create a new child. After filling data & clicking a save button, you'll come back to the GroupbookFragmentview and the new created data from the form will show up in the correct CardView within one of the three corresponding fragments.
So far I successfully implemented all functionalities when the methods and "Add child" button are already IN the corresponding tab child fragment (e.g. GroupbookKrippeFragment). The problem here is, whenever I change the tab from the tabLayout, the "Add Child" button is moving away aswell. So after moving all methods & the button into the parent fragment GroupbookFragment I can navigate through all pages and fill the form & save, but the recyclerView won't update and show the new created data in the child's recyclerView anymore?!
Thanks in advance for any help! Here is the code view:
GroupbookFragment.java
public class GroupbookFragment extends Fragment {
// initializing elements
RecyclerView recyclerView;
ChildListAdapter childListAdapter;
List<Child> children = new ArrayList<>();
RoomDb database;
FloatingActionButton addChildBtn;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_groupbook, container, false);
// inflate the layout for GB Krippe fragment
View viewKrippe = inflater.inflate(R.layout.fragment_groupbook_krippe, container, false);
// link recycler view to correct element
recyclerView = viewKrippe.findViewById(R.id.recycler_view_krippe);
// Tab layout initialization
TabLayout tabLayout = view.findViewById(R.id.tabLayout);
ViewPager2 viewPager = view.findViewById(R.id.viewPager_groupBook);
GroupbookAdapter adapterGroupBook = new GroupbookAdapter(getChildFragmentManager(), getLifecycle());
viewPager.setAdapter(adapterGroupBook);
// set 3 Tab titles
tabLayout.addTab(tabLayout.newTab().setText("Krippe"));
tabLayout.addTab(tabLayout.newTab().setText("Hafen"));
tabLayout.addTab(tabLayout.newTab().setText("Kindergarten"));
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
viewPager.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
#Override
public void onPageSelected(int position) {
tabLayout.selectTab(tabLayout.getTabAt(position));
}
});
return view;
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
// add Child code
database = RoomDb.getInstance(getContext());
children = database.mainDAO().getAll();
updateRecycler(children);
// link var to app element & set on click route
addChildBtn = view.findViewById(R.id.child_add_btn);
addChildBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(GroupbookFragment.this.getContext(), AddChildActivity.class);
startActivityForResult(intent, 101);
}
});
}
#Override
public void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 101) {
if (resultCode == Activity.RESULT_OK) {
Child new_child = (Child) data.getSerializableExtra("child");
database.mainDAO().insert(new_child);
children.clear();
children.addAll(database.mainDAO().getAll());
childListAdapter.notifyDataSetChanged();
}
}
}
void updateRecycler(List<Child> children) {
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(GroupbookFragment.this.getContext()));
childListAdapter = new ChildListAdapter(GroupbookFragment.this.getContext(), children, childClickListener);
recyclerView.setAdapter(childListAdapter);
}
private final ChildClickListener childClickListener = new ChildClickListener() {
#Override
public void onClick(Child child) {
}
#Override
public void onLongClick(Child child, CardView cardView) {
}
};
}
GroupbookFragment.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".Fragments.HomeFragment">
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:tabIndicatorAnimationMode="elastic" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="#id/tabLayout">
<androidx.viewpager2.widget.ViewPager2
android:id="#+id/viewPager_groupBook"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
<!-- Add floating button to add child-->
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/child_add_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_margin="#dimen/margin_cardView"
android:backgroundTint="#color/green"
android:src="#drawable/ic_add_child"
app:tint="#color/white" />
</RelativeLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
GroupbookKrippeFragment.xml
<?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=".Fragments.Groupbook.GroupbookKrippeFragment">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.cardview.widget.CardView
android:id="#+id/groupBook_krippe_1"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_margin="#dimen/margin_cardView"
app:cardCornerRadius="#dimen/cornerRadius_Card"
app:cardElevation="#dimen/elevation_default"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toTopOf="#id/groupBook_krippe_2"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/creme_500"
android:layout_weight="6"
android:padding="#dimen/padding_default">
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline_group_1_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.1" />
<ImageView
android:id="#+id/ic_groupBook_krippe_1"
android:layout_width="#dimen/iconSize_groupBook_header"
android:layout_height="match_parent"
android:scaleType="fitCenter"
android:src="#drawable/ic_groupbook_krippe_1_logo"
app:tint="#color/white"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#id/guideline_group_1_start"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
/>
<TextView
android:id="#+id/title_groupBook_krippe_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/margin_default"
android:text="Gruppe 1"
android:textAllCaps="true"
android:textSize="#dimen/textSize_groupBook_title"
android:textColor="#color/white"
android:fontFamily="#font/candy_beans"
app:layout_constrainedWidth="true"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="#id/guideline_group_1_start"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="#id/desc_groupBook_krippe_1"/>
<TextView
android:id="#+id/desc_groupBook_krippe_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/margin_default"
android:text="Gesamt: 12 | Anwesend: 10"
android:textSize="#dimen/textSize_groupBook_subTitle"
android:textColor="#color/white"
android:fontFamily="#font/candy_beans"
app:layout_constrainedWidth="true"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="#id/guideline_group_1_start"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#id/title_groupBook_krippe_1"
app:layout_constraintBottom_toBottomOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:padding="#dimen/padding_default"
android:orientation="vertical">
<TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TableRow>
<TextView
android:text="ID"
android:textStyle="bold"
android:gravity="center"
android:layout_weight="0.5"/>
<TextView
android:text="Vorname"
android:textStyle="bold"
android:gravity="center"
android:layout_weight="0.5"/>
<TextView
android:text="Nachname"
android:textStyle="bold"
android:gravity="center"
android:layout_weight="0.5"/>
<TextView
android:text="Geburtstag"
android:textStyle="bold"
android:gravity="center"
android:layout_weight="0.5"/>
<TextView
android:text="Geburtsort"
android:textStyle="bold"
android:gravity="center"
android:layout_weight="0.5"/>
<TextView
android:text="Konfession"
android:textStyle="bold"
android:gravity="center"
android:layout_weight="0.5"/>
<TextView
android:text="Nationalität"
android:textStyle="bold"
android:gravity="center"
android:layout_weight="0.5"/>
</TableRow>
</TableLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_view_krippe"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</androidx.recyclerview.widget.RecyclerView>
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>
</RelativeLayout>
I want to test if the button works on my application.
They are placed inside my first fragment. When I click "All" Button it does not respond at all. My main goal is to load fragment,but in this case I put System.out.println just to test if my button is going to work,but it obviously is not working.
I have tried to make new project and it works,but only inside Main Activity,I want this inside me Exercises_Tab fragment.
I do not see any error logs at all..
public class Exercises_Tab extends Fragment {
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View Exercises = inflater.inflate(R.layout.fragment_1,container,false);
Button allbtn = (Button) Exercises.findViewById(R.id.all_button);
allbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
System.out.println("Test");
}
});
return Exercises;
}
}
And my XML:
<LinearLayout
android:id="#+id/Linear_Layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text= " Muscles "
android:background="#000000"
android:textColor="#ffffff"
android:textSize="25dp"
android:layout_marginTop="3dp"/>
<HorizontalScrollView
android:id="#+id/scrollViewhorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingVertical="-20dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:layout_width="80dp"
android:layout_height="40dp"
android:layout_margin="-20dp"
android:layout_marginRight="2dp"
android:background="#fafafa"
android:text="All"
android:textColor="#696969"
android:id="#+id/all_button"/>
<Button
android:layout_width="80dp"
android:layout_height="40dp"
android:text="Button 1"
android:id="#+id/second_button"
android:background="#fafafa"
android:textColor="#696969"
android:layout_margin="-20dp"
android:layout_marginRight="2dp"/>
<Button
android:layout_width="80dp"
android:layout_height="40dp"
android:layout_margin="-20dp"
android:layout_marginRight="2dp"
android:background="#fafafa"
android:text="Button 1"
android:textColor="#696969" />
<Button
android:layout_width="80dp"
android:layout_height="40dp"
android:text="Button 1"
android:background="#fafafa"
android:textColor="#696969"
android:layout_margin="-20dp"
android:layout_marginRight="2dp"/>
<Button
android:layout_width="80dp"
android:layout_height="40dp"
android:text="Button 1"
android:background="#fafafa"
android:textColor="#696969"
android:layout_margin="-20dp"
android:layout_marginRight="2dp"/>
<Button
android:layout_width="80dp"
android:layout_height="40dp"
android:text="Button 1"
android:background="#fafafa"
android:textColor="#696969"
android:layout_margin="-20dp"
android:layout_marginRight="2dp"/>
<Button
android:layout_width="80dp"
android:layout_height="40dp"
android:text="Button 1"
android:background="#fafafa"
android:textColor="#696969"
android:layout_margin="-20dp"
android:layout_marginRight="2dp"/>
<Button
android:layout_width="80dp"
android:layout_height="40dp"
android:text="Button 1"
android:background="#fafafa"
android:textColor="#696969"
android:layout_margin="-20dp"
android:layout_marginRight="2dp"/>
<Button
android:layout_width="80dp"
android:layout_height="40dp"
android:text="Button 1"
android:background="#fafafa"
android:textColor="#696969"
android:layout_margin="-20dp"
android:layout_marginRight="2dp"/>
<Button
android:layout_width="80dp"
android:layout_height="40dp"
android:text="Button 1"
android:background="#fafafa"
android:textColor="#696969"
android:layout_margin="-20dp"
android:layout_marginRight="2dp"/>
</LinearLayout>
</HorizontalScrollView>
</LinearLayout>
<FrameLayout
android:id="#+id/Frame_Layout"
android:layout_width="250dp"
android:layout_height="250dp"
android:layout_gravity="center"
android:layout_centerHorizontal="true"
android:background="#color/colorPrimary"
android:layout_below="#+id/Linear_Layout"
>
</FrameLayout>
Perform your entire code inside this function for fragment as it already has a reference to your xml view.
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Button allbtn = (Button) view.findViewById(R.id.all_button);
allbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
System.out.println("Test");
}
});
}
Simply you can implement the click listener like
public class Exercises_Tab extends Fragment implements OnClickListener {
Button allbtn ;
#Override
public View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedinstanceState) {
View Exercises = inflater.inflate(R.layout.fragment_1,container,false);
allbtn = (Button) Exercises.findViewById(R.id.all_button);
allbtn .setOnClickListener(this);
return Exercises ;
}
#Override
public void onClick(View v) {
// implements your things
}
}
I prefer this because it makes your code more readable.
I created a custom dialog fragment to be used as a YesNo Dialog Box for my project as shown below
I want to use it dynamically in where I can use it not only for one xml file.
Does anybody know how can I set the button click listener in the appcompact class from the dialogfragment on call?
I just want to set the buttonclick event of the dialogfragment in another xml file.
I tried using interface but it gives me a null pointer exception so I tried the code below.
the YesNoDialogFragment Class
public class DialogYesNo extends DialogFragment {
LayoutInflater inflater;
View v;
#NonNull
#Override
public Dialog onCreateDialog(#Nullable Bundle savedInstanceState) {
inflater = getActivity().getLayoutInflater();
v = inflater.inflate(R.layout.dialog_yesno,null);
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setView(v);
return builder.create();
}
}
the XML file of the DialogFragment
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:background="#drawable/dialog_background"
android:layout_gravity="center">
<TextView
android:id="#+id/yesno_title"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="TITLE"
android:textAlignment="center"
android:textAllCaps="true"
android:textSize="10pt"
android:background="#1b1b01"
android:textColor="#fff"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="7dp"
android:paddingLeft="10dp"
android:textStyle="bold"/>
<View
android:id="#+id/divider"
android:layout_width="match_parent"
android:layout_height="5dp"
android:background="?android:attr/listDivider" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#520456">
<TextView
android:id="#+id/yesno_message"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="Message"
android:textAllCaps="true"
android:textSize="12dp"
android:textColor="#fff"
android:paddingLeft="10dp"
android:textStyle="bold"/>
</ScrollView>
<View
android:id="#+id/divider1"
android:layout_width="match_parent"
android:layout_height="10dp"
android:background="?android:attr/listDivider" />
<LinearLayout
android:orientation="horizontal"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:gravity="center">
<Button
android:id="#+id/dialog_No"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="NO"
android:background="#drawable/dialog_background"
android:textColor="#000"
android:textStyle="bold"
android:textSize="10pt"/>
<Button
android:id="#+id/dialog_Yes"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="YES"
android:layout_marginLeft="8dp"
android:background="#drawable/dialog_background"
android:textColor="#000"
android:textStyle="bold"
android:textSize="10pt"/>
</LinearLayout>
this is the code in the MainActivity
btnYes = dialogYesNo.getActivity().findViewById(R.id.dialog_Yes);
btnNo = dialogYesNo.getActivity().findViewById(R.id.dialog_No);
btnYes.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,TutwithNavigation.class);
startActivity(intent);
}
});
btnNo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// code here
}
});
try findViewById in your DialogYesNo, and add setListener for it
like this:
private OnClickListener onYesClick;
private OnClickListener onNoClick;
public Dialog onCreateDialog(#Nullable Bundle savedInstanceState) {
inflater = getActivity().getLayoutInflater();
v = inflater.inflate(R.layout.dialog_yesno,null);
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setView(v);
View btnYes = v.findViewById(R.id.dialog_Yes);
View btnNo = v.findViewById(R.id.dialog_No);
btnYes.setOnClickListener(onYesClick);
btnNo.setOnClickListener(onNoClick);
return builder.create();
}
}
public void setOnYesClick(OnClickListener listener){
onYesClick = listener
}
public void setOnNoClick(OnClickListener listener){
onNoClick = listener
}
use setOnYesClick and setOnNoClick instead
I'm pretty new to Android Studio and I'm having difficulty starting a new activity. I've triple checked my code and I can't figure out what my problem is. I've also google searched for a couple of hours but nobody seems to have had the same problem as me. Logcat isn't reporting a problem, but when I run the app, and click the button, the app goes to a blank screen. Please help!
public class OriginalFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_original, container, false);
return rootView;
}
}
public class MainFragment extends Fragment {
private AlertDialog mDialog;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
//Sets up the about button
View aboutButton = rootView.findViewById(R.id.about_button);
aboutButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle(R.string.about_title);
builder.setMessage(R.string.about_text);
builder.setCancelable(false);
builder.setPositiveButton(R.string.ok_label,
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
mDialog=builder.show();
}
});
View originalButton = rootView.findViewById(R.id.original_button);
originalButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(getActivity(), OriginalActivity.class);
getActivity().startActivity(intent);
}
});
View pictureButton = rootView.findViewById(R.id.picture_button);
originalButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View view){
Intent intent = new Intent(getActivity(), PictureActivity.class);
getActivity().startActivity(intent);
}
});
return rootView;
}
#Override
public void onPause(){
super.onPause();
if (mDialog != null)
mDialog.dismiss();
}
}
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
<FrameLayout
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:clipChildren= "false"
tools:context= "org.example.abstract_art.MainActivity">
<fragment android:id= "#+id/main_fragment"
class= "org.example.abstract_art.MainFragment"
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:layout_gravity= "center"
tools:layout= "#layout/fragment_main" />
</FrameLayout>
<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:background="#drawable/select_shapes_background"
tools:context="org.example.abstract_art.OriginalActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Select Shapes"
android:id="#+id/textView"
android:textSize="#dimen/menu_text_size"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<fragment
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:name="org.example.abstract_art.OriginalFragment"
android:id="#+id/fragment"
android:layout_below="#+id/textView"
android:layout_centerHorizontal="true"
tools:layout="#layout/fragment_original" />
</RelativeLayout>
<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:background="#drawable/menu_background"
android:elevation="#dimen/elevation_high"
android:orientation="vertical"
android:padding="#dimen/menu_padding"
tools:context=".org.example.abstract_art.MainFragment">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/menu_space"
android:text="#string/long_app_name"
android:textAppearance="?android:textAppearanceLarge"
android:textSize="#dimen/menu_text_size"/>
<Button
android:id="#+id/original_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/menu_button_margin"
android:padding="#dimen/menu_button_padding"
android:text="#string/original_label"/>
<Button
android:id="#+id/picture_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="#dimen/menu_button_margin"
android:padding="#dimen/menu_button_padding"
android:text="#string/picture_label"/>
<Button
android:id="#+id/about_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="#dimen/menu_button_margin"
android:padding="#dimen/menu_button_padding"
android:text="#string/about_label"/>
</LinearLayout>
<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:background="#drawable/menu_background"
android:orientation="vertical"
android:padding="#dimen/menu_padding"
tools:context="org.example.abstract_art.OriginalFragment">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Circles"
android:id="#+id/circlesText"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textSize="#dimen/menu_text_size"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Rectangles"
android:id="#+id/rectanglesText"
android:layout_below="#+id/circlesText"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textSize="#dimen/menu_text_size"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Squares"
android:id="#+id/squaresText"
android:layout_below="#+id/rectanglesText"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textSize="#dimen/menu_text_size"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Triangles"
android:id="#+id/trianglesText"
android:layout_below="#+id/squaresText"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textSize="#dimen/menu_text_size"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="4 Point Stars"
android:id="#+id/fourStarText"
android:layout_below="#+id/trianglesText"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textSize="#dimen/menu_text_size"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="6 Point Stars"
android:id="#+id/sixStarText"
android:layout_below="#+id/fourStarText"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textSize="#dimen/menu_text_size"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Create Art!"
android:id="#+id/createOriginalButton"
android:layout_below="#+id/sixStarText"
android:layout_centerHorizontal="true" />
</RelativeLayout>
Please Make sure Below Things
You have Define Main Activity, OriginalActivity,PictureActivity in your Manifest file
Please Make sure You also set Layout in all Activity or Fragment and Bind Components Of All Layout in that class
try below code
Button originalBtn; //Define class Level
originalBtn=(Button)rootView.findViewById(R.id.original_button);
Now you can set click Listener and code in it
Second main things that you define two times originalButton Click Listener so i think thats why you get problem
I think second Listener should be pictureButton Click Listener
I am trying to make a popup window in an activity. The popup window shows up when we click a button in the activity. The layout for popup window is to show a radio group containing 4 radio buttons, a button and a seek bar and has to return a value to the main activity based on the selected radio button when the button in the pop up window is pressed.
When i run the app and open the pop up window it is giving we this error:
"java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RadioGroup.setOnCheckedChangeListener(android.widget.RadioGroup$OnCheckedChangeListener)' on a null object reference "
The code for my main activity is:
public class CustomMenuActivity extends Activity
{
String ingredientName;
String ingredientQuantity;
private PopupWindow pw;
Button setQuantity;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_custom_menu);
setQuantity = (Button) findViewById(R.id.btnSetQty);
setQuantity.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v)
{
initiatePopupWindow();
}
});
}
private void initiatePopupWindow()
{
try {
//We need to get the instance of the LayoutInflater, use the context of this activity
LayoutInflater inflater = (LayoutInflater) CustomMenuActivity.this
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
//Inflate the view from a predefined XML layout
View layout = inflater.inflate(R.layout.set_quantity_popup,
(ViewGroup) findViewById(R.id.popupElementid));
// create a 600px width and 570px height PopupWindow
pw = new PopupWindow(layout, 600, 570, true);
// display the popup in the center
pw.showAtLocation(layout, Gravity.CENTER, 0, 0);
RadioGroup radioGroup;
radioGroup = (RadioGroup) findViewById(R.id.radioGroupid);
final String[] tempQtyVar = new String[1];
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId){
case R.id.rbqty30id:
tempQtyVar[0] = "30";
break;
case R.id.rbqty60id:
tempQtyVar[0] = "60";
break;
case R.id.rbqty90id:
tempQtyVar[0] = "90";
break;
case R.id.rbqtycutomid:
tempQtyVar[0] = "120";
break;
}
}
});
Button setQtyBtn = (Button) layout.findViewById(R.id.buttonOkSetQtyid);
setQtyBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ingredientQuantity = tempQtyVar[0];
Toast.makeText(getApplicationContext(),ingredientQuantity,Toast.LENGTH_LONG).show();
pw.dismiss();
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
The layout.xml for my pop up window is:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:background="#fd050505"
android:padding="30dp"
android:id="#+id/popupElementid">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:id="#+id/relativeLayout">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SET QUANTITY"
android:textColor="#84e9e6"
android:textSize="20sp"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:textStyle="bold"
android:id="#+id/popupTitleid"/>
<LinearLayout
android:layout_width="600dp"
android:layout_height="wrap_content"
android:layout_below="#+id/popupTitleid"
android:orientation="horizontal"
android:background="#drawable/btn_rounded_boarder"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp">
<RadioGroup
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/radioGroupid"
android:layout_marginTop="20dp"
android:layout_marginBottom="20dp"
android:orientation="horizontal"
>
<RadioButton
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text=" 30ml "
android:textColor="#84e9e6"
android:id="#+id/rbqty30id"
android:checked="true" />
<RadioButton
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="#84e9e6"
android:text=" 60ml "
android:id="#+id/rbqty60id" />
<RadioButton
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="#84e9e6"
android:text=" 90ml "
android:id="#+id/rbqty90id" />
<RadioButton
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="#84e9e6"
android:text=" Custom Value "
android:id="#+id/rbqtycutomid"
/>
</RadioGroup>
</LinearLayout>
<LinearLayout
android:layout_width="600dp"
android:layout_height="wrap_content"
android:layout_marginTop="50dp"
android:layout_centerHorizontal="true">
<SeekBar
android:id="#+id/customqtySBid"
android:layout_height="fill_parent"
android:layout_width="600dp"
android:textColor="#84e9e6"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"
android:layout_marginTop="150dp"
android:paddingBottom="10dp"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layout_centerHorizontal="true">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/buttonOkSetQtyid"
android:textColor="#84e9e6"
android:text="OK"
android:background="#drawable/btn_rounded_boarder"
android:layout_marginTop="275dp"/>
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
I tried looking for answer online but didn't really find solution specific to my problem. Please suggest any solutions.
Thanks in advance.
You seem to be inflating the wrong layout. Change the correct layout.xml in
setContentView(R.layout.activity_custom_menu);