android activity狀態儲存

標籤：

一、被其他任務打斷（來電話），再次開啟希望保留資料

    private String SAVE_INSTANCE_TAG = "ATWAL";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_cal);        if (savedInstanceState != null) {            String s = savedInstanceState.getString(SAVE_INSTANCE_TAG);        }    }    //系統在回收當前Activity之前會調用，Back & Home 不會調用此方法    @Override    public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {        if (outState != null) {            outState.putString(SAVE_INSTANCE_TAG, "hello atwal");        }        super.onSaveInstanceState(outState, outPersistentState);    }

 

二、希望橫豎屏切換、按了 Home or Back 鍵後再回來保留資料

    @Override    protected void onResume() {        super.onResume();        String s = this.getPreferences(MODE_PRIVATE).getString(SAVE_INSTANCE_TAG, "");    }    @Override    protected void onPause() {        super.onPause();        this.getPreferences(MODE_PRIVATE).edit().putString(SAVE_INSTANCE_TAG, "after pause");    }

 

android activity狀態儲存