savedInstanceState is always null

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星月不相逢
星月不相逢 2020-11-29 00:53

This is my savedInstaceState code:

@Override
public void onSaveInstanceState(Bundle savedInstanceState) 
{
    savedInstanceState.putStringArrayList(\"todo_a         


        
13条回答
  •  不知归路
    2020-11-29 01:35

    To debug, consider implementing onRestoreInstanceState and placing a call to Log.d in this method. Then, in the emulator, hit ctrl-F11 or whatever to rotate the phone. Your call to Log.d should be hit.

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