Android Four Components acitivity (2) Save Activity Status (Field protection)

Activity Site Protection

    @Override    protectedvoid  onsaveinstancestate (Bundle outstate) {         // Save Data        Super . Onsaveinstancestate (outstate);    }    @Override    protectedvoid  onrestoreinstancestate (Bundle savedinstancestate) {         // Recovering data        Super . Onrestoreinstancestate (savedinstancestate);    }

Note: because Onsaveinstancestate () is not guaranteed to be called every time, you should only use it to record some temporary state information for the activity (the state of the UI)

--Never use it to save data that needs to be stored for a long time. The alternative is that you should be on the move when the user leaves the activity

Use OnPause () to store persistent data (for example, data that needs to be stored in a database).

　　　　

Android Four Components acitivity (2) Save Activity Status (Field protection)