Issue
I have some fragments in my activity
[1], [2], [3], [4], [5], [6]
And on Back Button Press I must to return from [2] to [1] if current active fragment is [2], or do nothing otherwise.
What is the best practise to do that?
EDIT: Application must not return to [2] from [3]...[6]
Solution
When you are transitioning between Fragments, call addToBackStack()
as part of your FragmentTransaction
:
FragmentTransaction tx = fragmentManager.beginTransation();
tx.replace( R.id.fragment, new MyFragment() ).addToBackStack( "tag" ).commit();
If you require more detailed control (i.e. when some Fragments are visible, you want to suppress the back key) you can set an OnKeyListener
on the parent view of your fragment:
//You need to add the following line for this solution to work; thanks skayred
fragment.getView().setFocusableInTouchMode(true);
fragment.getView().requestFocus();
fragment.getView().setOnKeyListener( new OnKeyListener()
{
@Override
public boolean onKey( View v, int keyCode, KeyEvent event )
{
if( keyCode == KeyEvent.KEYCODE_BACK )
{
return true;
}
return false;
}
} );
Answered By - Mark Allison
Answer Checked By - Mildred Charles (JavaFixing Admin)