Calling A Method In A Fragment From A Separate Class
What's the best way to call a method inside a fragment from a different class? I passed the context via getActivity() into the class. Something along the lines of ((Fragment) ((Act
Solution 1:
I think you can do something like this:
Create interface OnMyDialogClickListener
and class MyDialogFragment
, which will call methods of created interface
publicclassMyDialogFragmentextendsDialogFragment {
private OnMyDialogClickListener listener;
publicstatic DialogFragment newInstance(OnMyDialogClickListener listener) {
DialogFragmentfragment=newMyDialogFragment(listener);
return fragment;
}
privateMyDialogFragment(OnMyDialogClickListener listener) {
this.listener = listener;
}
@Overridepublic Dialog onCreateDialog(Bundle savedInstanceState) {
....
dialog.findViewById(R.id.button).setOnClickListener(newDialogButtonsClickListener);
return dialog
}
privatefinalclassDialogButtonsClickListenerimplementsView.OnClickListener {
@OverridepublicvoidonClick(View view) {
listener.Method();
}
}
publicstaticinterfaceOnMyDialogClickListener {
voidMethod();
}
Copy
}
Implement interface in your target fragment:
publicclassAlbumsFragmentextendsBaseFragmentimplementsOnMyDialogClickListener {
.....
@OverridepublicvoidonViewCreated(View view, Bundle savedInstanceState) {
//show dialogDialogFragmentmyDialogFragment= MyDialogFragment.newInstance(this);
myDialogFragment.show(getFragmentManager(), ALBUM_ACTION_TAG);
}
@OverridepublicvoidMethod() {
//some code
}
}
Solution 2:
It depends what are you doing.
If the operation was issued from a Fragment, you should pass a Fragment instance to a class or method that does it.
If that's an event like "user logged out" or "sdcard removed" you should send a local broadcast and register a BroadcastReceiver in the Fragment.
Solution 3:
Two methods I use frequently:
//#1 interface method in turn calls fragment;
((SomeInteraceOrSuperClass) getActivity).intefaceMethod();
//#2 hashmap = fragment directory;
TitleFrag titlefrag = (TitleFrag) getActivity().m_mapFrags.get(KEY_TITLEFRAG);
titleFrag.method();
Solution 4:
This way -> https://developer.android.com/training/basics/fragments/communicating.html (interfaces and magic)
Please, check android developers often. It contains many awnsers on good pratices.
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