鬆日時的變化方向

Question

可能重複：
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

在我的應用程序有例如，一個EditText上。在縱向模式下，我輸入字母，當我旋轉我的設備時，我看到空的Edittext。有沒有辦法做到這一點？請幫忙嗎？

Answer 1

保存你的數據在

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

和恢復數據，如果任何在OnCreate

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

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

爲清楚起見，你可能希望定義

private static final String MYTEXT_SAVED_ITEM = "MyText";