How to detect user inactivity in Android

User start my app and logs in.
Selects Session Timeout to be 5 mins.
Does some operations on the app. (all in foreground)
Now User bring Myapp to background and starts some other app.
----> Count down timer starts and logs out user after 5 mins
OR user turns the screen OFF.
----> Count down timer starts and logs out user after 5 mins

I want the same behavior even when the app is in the foreground but user doesn't interact with the app for a long-time say 6-7 mins. Assume the screen is ON all the time. I want to detect kind of user inactivity (No interaction with app even though the app is in the foreground) and kick start my count down timer.

public class MyApplication extends Application {
      private int lastInteractionTime;
      private Boolean isScreenOff = false; 
      public void onCreate() {
        super.onCreate();
        // ......   
        startUserInactivityDetectThread(); // start the thread to detect inactivity
        new ScreenReceiver();  // creating receive SCREEN_OFF and SCREEN_ON broadcast msgs from the device.
      }

      public void startUserInactivityDetectThread() {
        new Thread(new Runnable() {
          @Override
          public void run() {
            while(true) {
              Thread.sleep(15000); // checks every 15sec for inactivity
              if(isScreenOff || getLastInteractionTime()> 120000 ||  !isInForeGrnd)
                {
                  //...... means USER has been INACTIVE over a period of
                  // and you do your stuff like log the user out 
                }
              }
          }
        }).start();
      }

      public long getLastInteractionTime() {
        return lastInteractionTime;
      }

      public void setLastInteractionTime(int lastInteractionTime) {
        this.lastInteractionTime = lastInteractionTime;
      }

      private class ScreenReceiver extends BroadcastReceiver {

        protected ScreenReceiver() {
           // register receiver that handles screen on and screen off logic
           IntentFilter filter = new IntentFilter();
           filter.addAction(Intent.ACTION_SCREEN_ON);
           filter.addAction(Intent.ACTION_SCREEN_OFF);
           registerReceiver(this, filter);
        }

        @Override
        public void onReceive(Context context, Intent intent) {
          if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            isScreenOff = true;
          } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            isScreenOff = false;
          }
        }
      }
    }

isInForeGrnd ===> logic is not shown here as it is out of scope of the question

You can wake the lock to the cpu by using the device code below-

  if(isScreenOff || getLastInteractionTime()> 120000 ||  !isInForeGrnd)
    {
      //...... means USER has been INACTIVE over a period of
      // and you do your stuff like log the user out 

      PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);

      boolean isScreenOn = pm.isScreenOn();
      Log.e("screen on.................................", "" + isScreenOn);

      if (isScreenOn == false) {

        PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, "MyLock");

        wl.acquire(10000);
        PowerManager.WakeLock wl_cpu = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyCpuLock");

        wl_cpu.acquire(10000);
      }
    }