first take a look on a part of my fragment xml file `
<LinearLayout
android:layout_weight="1"
android:background="#aae4e4e4"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RadioGroup
android:id="@+id/group_no_1"
android:layout_width="480dp"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="rbclick"
android:text="0" />
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:onClick="rbclick"
android:text="1" />
<RadioButton
android:id="@+id/radio2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:onClick="rbclick"
android:text="2" />
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:onClick="rbclick"
android:text="3" />
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:onClick="rbclick"
android:text="4" />
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:onClick="rbclick"
android:text="5" />
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:onClick="rbclick"
android:text="6" />
</RadioGroup>
</LinearLayout>
now take look on my fragment java class
public class MealEntry extends Fragment {
private MealEntryViewModel mViewModel;
private DatePickerDialog.OnDateSetListener mDateSetListener;
private static final String TAG = "MealEntry";
public RadioGroup rg;
RadioButton rb;
public static MealEntry newInstance() {
return new MealEntry();
}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
View view= inflater.inflate(R.layout.meal_entry_fragment, container, false);
rg = view.findViewById(R.id.group_no_1);
return view;
}
public void rbclick (View v){
int radiobtnid=rg.getCheckedRadioButtonId();
rb=(RadioButton)findViewById(radiobtnid);
}
previously by this procedure i mean the (rbclick function ) can handle the radio group and radio button in Activity(i repeat Activity). but in Fragment the onClick method is not working. how can i resolve this? I've tried this way for fragment.
public void rbclick (View v){
int radiobtnid=rg.getCheckedRadioButtonId();
rb =(RadioButton)getActivity().findViewById(radiobtnid);
}
I think this handler is not working. cause it's got crash when i click the radio button.
here's is Log cat.
12-18 22:29:07.715 3720-3720/com.example.closeup W/PathParser: Points are too far apart 4.000000596046461
12-18 22:29:11.963 3720-3720/com.example.closeup W/ResourceType: No package identifier when getting name for resource number 0x00000016
12-18 22:29:11.964 3720-3720/com.example.closeup D/AndroidRuntime: Shutting down VM
12-18 22:29:11.972 3720-3720/com.example.closeup E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.closeup, PID: 3720
android.content.res.Resources$NotFoundException: Unable to find resource ID #0x16
at android.content.res.Resources.getResourceEntryName(Resources.java:2127)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:433)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:393)
at android.view.View.performClick(View.java:4780)
at android.widget.CompoundButton.performClick(CompoundButton.java:120)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5293)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
12-18 22:34:12.034 3720-3720/com.example.closeup I/Process: Sending signal. PID: 3720 SIG: 9
Here is solution to handle radio group in fragment.
1.Remove all line android:onClick="rbclick" from each RadioButton in meal_entry_fragment.xml file, and create an id for each RadioButton.
<?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:layout_weight="1"
android:background="#aae4e4e4"
android:orientation="horizontal">
<RadioGroup
android:id="@+id/group_no_1"
android:layout_width="480dp"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioButton
android:id="@+id/radio0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0" />
<RadioButton
android:id="@+id/radio1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="1" />
<RadioButton
android:id="@+id/radio2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="2" />
<RadioButton
android:id="@+id/radio3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="3" />
<RadioButton
android:id="@+id/radio4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="4" />
<RadioButton
android:id="@+id/radio5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="5" />
<RadioButton
android:id="@+id/radio6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:text="6" />
</RadioGroup>
</LinearLayout>
2.Create an instance of OnCheckedChangeListener in MealFragment class.
private RadioGroup.OnCheckedChangeListener onCheckedChangeListener = new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId) {
case R.id.radio0:
// Write your code here
break;
case R.id.radio1:
// Write your code here
break;
case R.id.radio2:
// Write your code here
break;
case R.id.radio3:
// Write your code here
break;
case R.id.radio4:
// Write your code here
break;
case R.id.radio5:
// Write your code here
break;
case R.id.radio6:
// Write your code here
break;
default:
break;
}
}
};
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.meal_entry_fragment, container, false);
rg = view.findViewById(R.id.group_no_1);
rg.setOnCheckedChangeListener(onCheckedChangeListener);
return view;
}