更改方向时的松散日期

Question

  

可能重复：
  when i change the orientation from portrait to landscape my calculated result is disappearing. how to resolve it?
  EditText is losing users' input when rotating android phone

在我的应用程序中，我有一个EditText。在纵向模式下，我输入字母，当我旋转设备时，我看到空的Edittext。有没有办法做到这一点？有什么帮助吗？

Answer 1

将数据保存在

中

public void onSaveInstanceState(Bundle savedInstanceState) {
    savedInstanceState.putString("MyText", edtMyText.getText().toString());
}

并在OnCreate

中恢复您的数据

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.my_activity);

        if (savedInstanceState != null) {
            String myString = savedInstanceState.getString("MyText");
            edtMyText.setText(myString);
        }
    }

为清楚起见，您可能需要定义

private static final String MYTEXT_SAVED_ITEM = "MyText";