Fetching Savedinstancestate Values, Nullpointerexception

@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main2); savedInstanceState.putString('foo', 'bar

Solution 1:

Override onSaveInstanceState for saving values in savedInstanceState Bundle as:

public String strfoo="";
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main2);
            //comment this line you only fatch values from savedInstanceState
            String myString = savedInstanceState.getString("foo");
            Log.i("debug", "saved data: " + myString);
            // savedInstanceState.putString("foo", "bar");
            strfoo="bar"; set value here
        }

        @Override
        public void onRestoreInstanceState(Bundle savedInstanceState) {
          super.onRestoreInstanceState(savedInstanceState);
          String myString = savedInstanceState.getString("foo");
          Log.i("debug", "saved data: " + myString);
        }

      @Override

      public void onSaveInstanceState(Bundle savedInstanceState) {
         savedInstanceState.putString("foo", strfoo);
         super.onSaveInstanceState(savedInstanceState);

       }