Chip Group OnCheckedChangeListener() not triggered
I'm trying to make a recyclerview filter based ChipGroup & Chip
I'm use fragment on my app, so, the fragment who contain the RecyclerView contain a frameLayout who inflate the ChipGroup filter fragment
I'm trying to trigger a listener when the user unselect all chip inside ChipGroup (I've already put listener on chip for trigger when chip are checked by user)
I've already put some listener on chipgroup but no one are trigered
FilterFragment.java
public class FilterFragment extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
public ChipGroup chipGroup;
// TODO: Rename and change types of parameters
public View.OnClickListener chipClickListener;
private OnFragmentInteractionListener mListener;
public FilterFragment() {
// Required empty public constructor
}
public static FilterFragment newInstance(View.OnClickListener
param1) {
CoachFilterFragment fragment = new CoachFilterFragment();
Bundle args = new Bundle();
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup
container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_filter,
container, false);
this.chipGroup = view.findViewById(R.id.chipGroup);
for(Skill skill : ((MainActivity)getContext()).api.skills){
Chip chip = new Chip(getContext());
chip.setId(skill.getId());
chip.setText(skill.getName());
chip.setOnClickListener(chipClickListener);
chip.setCheckable(true);
chipGroup.addView(chip);
}
chipGroup.setOnCheckedChangeListener((chipGroup, id) -> {
Log.d("test","ok");
});
return view;
}
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}
FilterFragment.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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="wrap_content"
tools:context=".Fragment.FilterFragment">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.chip.ChipGroup
android:id="@+id/chipGroup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
</com.google.android.material.chip.ChipGroup>
</androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>
Someone have any idea why any listener are not triggered by my ChipGroup?Maybe I'm missing some parameter or something?
Answer
Your code is fine the only issue is that setOnCheckedChangeListener() only work when your ChipGroup is for singleSelection
Read this documentation of ChipGroup
- Register a callback to be invoked when the checked chip changes in this group.
- This callback is only invoked in single selection mode.
ALSO READ
Call setOnCheckedChangeListener(OnCheckedChangeListener) to register a callback to be invoked when the checked chip changes in this group. This callback is only invoked in single selection mode.
if you want use setOnCheckedChangeListener() of ChipGroup than you need to make app:singleSelection="true"
UPDATE
based on your below comment i have added sample code to manage to handle when ChipGroup selection
SAMPLE CODE for maintain selection in ChipGroup
Layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.chip.ChipGroup
android:id="@+id/chipGroup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
>
</com.google.android.material.chip.ChipGroup>
</androidx.constraintlayout.widget.ConstraintLayout>
<Button
android:layout_width="match_parent"
android:text="Get Result"
android:id="@+id/btnShowResult"
android:layout_gravity="bottom"
android:layout_height="wrap_content" />
</LinearLayout>
Activity code
public class Main3Activity extends AppCompatActivity {
public ChipGroup chipGroup;
public Button btnShowResult;
public ArrayList<Boolean> booleanArrayList = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main3);
chipGroup = findViewById(R.id.chipGroup);
btnShowResult = findViewById(R.id.btnShowResult);
btnShowResult.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
for (int i = 0; i < booleanArrayList.size(); i++) {
Log.e("RESULT", i + " :" + booleanArrayList.get(i));
}
}
});
for (int i = 0; i < 5; i++) {
Chip chip = new Chip(this);
chip.setId(i);
chip.setTag(i);
booleanArrayList.add(false);
chip.setText("Chip No : " + i);
chip.setCheckable(true);
chip.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
int tag = (int) compoundButton.getTag();
booleanArrayList.set(tag, b);
}
});
chipGroup.addView(chip);
}
chipGroup.invalidate();
chipGroup.setOnCheckedChangeListener(new ChipGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(ChipGroup chipGroup, int i) {
Chip chip = chipGroup.findViewById(i);
if (chip != null)
Toast.makeText(getApplicationContext(), "Chip is " + chip.getText().toString(), Toast.LENGTH_SHORT).show();
Log.e("OnCheckedChangeListener", "Called");
}
});
}
ChipGroup.OnCheckedChangeListener onCheckedChangeListener = new ChipGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(ChipGroup chipGroup, int i) {
}
};
}
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