[Android新手学习笔记08]-如何让活动Activity保存临时数据用于恢复

1.重写onSaveInstanceState()方法

@Override

protected void onSaveInstanceState(Bundle outState) {

   super.onSaveInstanceState(outState);

   String tempData = "Something you just typed";

   outState.putString("data_key", tempData);

}

2.在onCreate()方法中处理

@Override

protected void onCreate(Bundle savedInstanceState) {

   super.onCreate(savedInstanceState);

   setContentView(R.layout.activity_first);

   if (savedInstanceState != null) {

       String tempData = savedInstanceState.getString("data_key");

       Log.d("tag", tempData);

   }

}