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Detect when application is idle in Android

Posted by: admin May 14, 2020 Leave a comment

Questions:

I am developing an application that will be running in Kiosk Mode. In this application, if the user didn’t do anything in the application within 5 minutes, the application will show a screen saver that is the logo of the application.

My question is, how can I code on detecting IDLE within 5 minutes?

How to&Answers:

I think you could use http://developer.android.com/reference/android/app/Activity.html#dispatchTouchEvent(android.view.MotionEvent) and http://developer.android.com/reference/android/app/Activity.html#dispatchKeyEvent(android.view.KeyEvent) in your App to set a timestamp everytime a userinteraction takes place (simply override the methods and return false at the end so that the events will be propagated to underlying views) – then you can use some kind of timer which checks for the last timestamp of interaction recurringly and trigger your screen saver if your 5 minutes IDLE time are reached.

So in an Activity you simply override the before mentioned Methods like this:

@Override
public boolean dispatchTouchEvent (MotionEvent ev) {
   timestamp = System.getCurrentTimeMilis();
   return false; // return false to indicate that the event hasn't been handled yet
}

The dispatchKeyEvent and the other methods which you can override to determine user-activity should work fairly similar.

If you’re using more than one Activity you may want to create a base class which extends Activity and Override all the dispatchXXXEvent you want to handle and which you than use as base class of all your Activities. But I guess the details of your implementation may be a little bit out of scope for the actual question 🙂

For the different possibilities of timers you may find useful info here: Scheduling recurring task in Android

Answer:

A BETTER SOLUTION HERE…… VERY SIMPLE

I used countdown timer as bellow:

private long startTime = 15 * 60 * 1000; // 15 MINS IDLE TIME
private final long interval = 1 * 1000;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    countDownTimer = new MyCountDownTimer(startTime, interval);
}

@Override
public void onUserInteraction(){
    super.onUserInteraction();

    //Reset the timer on user interaction...
    countDownTimer.cancel();            
    countDownTimer.start();
}

public class MyCountDownTimer extends CountDownTimer {
    public MyCountDownTimer(long startTime, long interval) {
        super(startTime, interval);
    }

    @Override
    public void onFinish() {
        //DO WHATEVER YOU WANT HERE
    }

    @Override
    public void onTick(long millisUntilFinished) {
    }
}

CHEERS……….:)

Answer:

You should try this, It will Notify with a toast on detecting IDLE 5 minutes.

Handler handler;
Runnable r;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    handler = new Handler();
    r = new Runnable() {

        @Override
        public void run() {
            // TODO Auto-generated method stub
            Toast.makeText(MainActivity.this, "user Is Idle from last 5 minutes",
                Toast.LENGTH_SHORT).show();
        }
    };
    startHandler();
}
@Override
public void onUserInteraction() {
     // TODO Auto-generated method stub
     super.onUserInteraction();
     stopHandler();//stop first and then start
     startHandler();
}
public void stopHandler() {
    handler.removeCallbacks(r);
}
public void startHandler() {
    handler.postDelayed(r, 5*60*1000);
}

Answer:

try with:

private void startCount(int time) {

    new Handler().postDelayed(new Runnable() {

        @Override
        public void run() {

            // Add here the code for showing the fullscreenlogo

        }
    }, time);
}

then, whenever you want to start the count you should add:

startCount(time); // Replace time with 60*5*1000 for 5 mins

if you want to start the count when the app got minimized, then use this:

@Override
public void onPause() {
    super.onPause();
    startCount(time);
}