android onSaveInstanceState 保存当前界面数据

android onSaveInstanceState 保存当前界面数据

1.通过方法onSaveInstanceState(Bundle outState)保存当前的数据信息

 @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        String tempString = "something just like this";
        outState.putString("data_key",tempString);
    }

实际上，是将当前活动的数据以bundle对象存储
2.使用getString()提取bundle数据对象

   if (savedInstanceState != null){
       String tempString = savedInstanceState.getString("data_key");
       Log.d("my",tempString);
   }