Unique Timer for saving(SharedPreferences) elapsed time in activity

Question

as always Thanks for reading and thinking on this question.

I want to save elapsed time in some activities and using them later, i thought SharedPreferences would be a good choice for saving, but i found Using Chronometer not efficient. I'll appreciate any help. thanks.

score 0 · Accepted Answer · edited May 23 '17 at 10:28

Declare your variable:

long lastTimeRecorded;

Then in onCreate get a start time:

lastTimeRecorded = System.currentTimeMillis();

Then when you update the time call this function from the activity:

public void updateTimer(){

long elapsedTime = System.currentTimeMillis() - lastRecordedTime;
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    prefs.edit().putLong("elapsedTime", elapsedTime);
}

If you want it to repeat at certain intervals:

private final int interval = 1000; // in millis
private Handler handler = new Handler();
private Runnable runnable = new Runnable(){
    public void run() {
        updateTimer();
    }
};
...
handler.postAtTime(runnable, System.currentTimeMillis()+interval);
handler.postDelayed(runnable, interval);

From samuel, here How to set a timer in android

Thank you so much. That was just right for what i needed. :) — mazhar, Mar 19 '16 at 07:15
Happy to help. I had to build a timer not that long ago, so it was good to review. — Russell Elfenbein, Mar 19 '16 at 08:03

Unique Timer for saving(SharedPreferences) elapsed time in activity

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