Android. Save and reestablish value of chronometer (reversing screen)

Question

My question is rather simple, but i can't handle with him. I have chronometer field in my design.

I want to save them for avoid lost value of time by revert the screen (recreate new activity)

I use for save

    public Object onRetainConfigurationInstance(){
    return timeSeconds;
}

And for reestablish timeSeconds = (Chronometer) getLastNonConfigurationInstance();

But it doesn't work. Could somebody help me? What parameter i must save for reestablish chronometer time?

`But it doesn't work.` This tells us nothing. *Exactly* what happens? How do you know that timeSeconds is not the correct value? — Simon, Mar 31 '13 at 19:39

score 2 · Accepted Answer · answered Apr 01 '13 at 20:42

protected void onSaveInstanceState(Bundle outState) {
    outState.putLong(TIME_KEY, timeSeconds.getBase());
    super.onSaveInstanceState(outState);
}

protected void onRestoreInstanceState(Bundle savedInstanceState){
    if((savedInstanceState !=null)
            && savedInstanceState.containsKey(TIME_KEY)){
        timeSeconds.setBase(savedInstanceState.getLong(TIME_KEY));
    }
    super.onRestoreInstanceState(savedInstanceState);
}

score 1 · Answer 2 · edited Apr 17 '13 at 16:55

You should probably use onSaveInstanceState() to save data between orientation changes, your code can look like this:

@Override
protected void onSaveInstanceState(Bundle outState) {
    outState.putLong("time_seconds", timeSeconds);
    super.onSaveInstanceState(outState);
}

Then you can get stored value inside the onCreate(), which is called as the Activity gets recreated when orientation changes:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    long timeSeconds = savedInstanceState.getLong("time_seconds");
    // other code from onCreate()
}

Egor, thanks for help. It works with some modifications. Maybe it'll be useful for some beginners. — user2105282, Apr 01 '13 at 20:41

Android. Save and reestablish value of chronometer (reversing screen)

2 Answers2