Android studio pause and resume countdown timer for progress bar - android-studio

Question

I am using a countdown timer which updates my progress bar which decreases from 100 (full) to 0(empty) but when the app is paused would like to pause the timer and then restart it upon resuming the app. I implement the count down timer like so:
public class MyCountDownTimer extends CountDownTimer {
public MyCountDownTimer(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}
#Override
public void onTick(long millisUntilFinished) {
int progress = (int) (millisUntilFinished / 100);
progressBar.setProgress(progress);
}
#Override
public void onFinish() {
progressBar.setProgress(0);
Intent intent = new Intent(getApplicationContext(), GameOver.class);
startActivity(intent);
finish();
}
}
And in my on create:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_play_screen);
progressBar = (ProgressBar)findViewById(R.id.timerBar);
progressBar.setProgress(100);
myCountDownTimer = new MyCountDownTimer(10000, 10);
myCountDownTimer.start();
}

Answer 1

You can add a boolean in your MyCountDownTimer class that will change in the onPause and onResume methods of your Activity. Check the // ADDED comments to see the changes you have to make to make this work.
public class MyActivity extends Activity {
MyCountDownTimer myCountDownTimer;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_play_screen);
progressBar = (ProgressBar)findViewById(R.id.timerBar);
progressBar.setProgress(100);
myCountDownTimer = new MyCountDownTimer(10000, 10);
myCountDownTimer.start();
}
// ADDED
#Override
public void onPause() {
super.onPause(); // Always call the superclass method first
myCountDownTimer.pause();
}
// ADDED
#Override
public void onResume() {
super.onResume(); // Always call the superclass method first
myCountDownTimer.resume();
}
}
public class MyCountDownTimer extends CountDownTimer {
// ADDED
private boolean pause;
public MyCountDownTimer(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}
// ADDED
public void pause() {
pause = true;
}
// ADDED
public void resume() {
pause = false;
}
#Override
public void onTick(long millisUntilFinished) {
int progress = (int) (millisUntilFinished / 100);
// ADDED
if (!pause) {
progressBar.setProgress(progress);
}
}
#Override
public void onFinish() {
// ADDED
isRunning = false;
progressBar.setProgress(0);
Intent intent = new Intent(getApplicationContext(), GameOver.class);
startActivity(intent);
finish();
}
}