I've a activity which has onRequestPermissionsResult which is called whenever I request for permission at runtime but when I replace fragment from another fragment it is not called.
The process is: I have 3 Fragment Fragment A,B and C. Fragment A is the default fragment attached to MainActivity and on click of button I replace Fragment A to Fragment B and when I request permission for Fragment B it is running properly but after replacing Fragment B to Fragment C requesting a permission throws exception fragment not attached to activity
MainActivity Code:
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
List<Fragment> fragments = getSupportFragmentManager().getFragments();
if (fragments != null) {
for (Fragment fragment : fragments) {
fragment.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}
Fragment B Code
Fragment fragment = new ShedDetailFragment();
Bundle args=new Bundle();
args.putString("flockno",flockno);
args.putString("shedno",shedno.get(position));
fragment.setArguments(args);
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.add(fragment,"ShedDetailsFrament")
.replace(R.id.frame_container, fragment)
.commit();
Fragment C Code
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case 12:{
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
takePhotoFromCamera();
//Toast.makeText(getActivity(),"Permission Granted for Camera.Please Select Farm Photo",Toast.LENGTH_SHORT).show();
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
case 11:{
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
saveImage(bitmap);
//Toast.makeText(getActivity(),"Permission Granted for Storage.Please Select Farm Photo",Toast.LENGTH_SHORT).show();
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
Error Log When I Allow Any Permission
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.artevet.artevet, PID: 32741
java.lang.RuntimeException: Failure delivering result ResultInfo{who=@android:requestPermissions:, request=12, result=-1, data=Intent { act=android.content.pm.action.REQUEST_PERMISSIONS (has extras) }} to activity {com.artevet.artevet/com.artevet.artevet.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.app.Fragment.onRequestPermissionsResult(int, java.lang.String[], int[])' on a null object reference
at android.app.ActivityThread.deliverResults(ActivityThread.java:4998)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:5041)
at android.app.ActivityThread.access$1600(ActivityThread.java:229)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1875)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7325)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.app.Fragment.onRequestPermissionsResult(int, java.lang.String[], int[])' on a null object reference
at com.artevet.artevet.MainActivity.onRequestPermissionsResult(MainActivity.java:383)
at android.app.Activity.dispatchRequestPermissionsResult(Activity.java:7291)
at android.app.Activity.dispatchActivityResult(Activity.java:7169)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4994)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:5041)
at android.app.ActivityThread.access$1600(ActivityThread.java:229)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1875)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7325)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
