Develop Reference

Custom Count Up Timer

I need a count up timer in my application. I browsed many forums about this subject, but I could not find anything. Actually I understood we can do this with chronometer, but I have 2 problem with chronometer:
I cannot using chronometer in Service because chronometer needs a layout.
I cannot initialize chronometer to count more than 1 hour.
My code is here:
stopWatch = new Chronometer (MainActivity.this);
startTime = SystemClock.elapsedRealtime();
stopWatch.start();
stopWatch.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {
#Override
public void onChronometerTick(Chronometer arg0) {
countUp = (SystemClock.elapsedRealtime() - arg0.getBase()) / 1000;
String asText = (countUp / 60) + ":" + (countUp % 60);
Log.i("t", asText);
}
});

You can use a countDownTimer in reverse and get the time elapsed.
long totalSeconds = 30;
long intervalSeconds = 1;
CountDownTimer timer = new CountDownTimer(totalSeconds * 1000, intervalSeconds * 1000) {
public void onTick(long millisUntilFinished) {
Log.d("seconds elapsed: " , (totalSeconds * 1000 - millisUntilFinished) / 1000);
}
public void onFinish() {
Log.d( "done!", "Time's up!");
}
};
To start the timer.
timer.start();
To stop the timer.
timer.cancel();

The sec,min and hr increments everytime the values hit 59,59,23 respectively. Each values are displayed in different views creating a digital stopwatch.
checkin.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(final View view) {
checkin.setEnabled(false);
new CountDownTimer(300000000, 1000){
public void onTick(long millisUntilFinished){
sec++;
if(sec==59) {
min++;
sec=0;
}
if(min==59){
min=0;
hr++;
}
if(hr==23){
hr=00;
}
secView.setText(String.valueOf(sec));
minView.setText(String.valueOf(min));
hrView.setText(String.valueOf(hr));
}
public void onFinish(){
Snackbar.make(view, "Finish", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
}.start();
}
});

Using RxJava, you can write
Disposable var = Observable
.interval(1, TimeUnit.SECONDS)
.subscribe(
time -> {
long minutes = time / 60;
long second = time % 60;
timer.setText("" + minutes + ":" + second);
});
you can stop the timer by using
var.dispose()

You can use this code to do so:
https://gist.github.com/MiguelLavigne/8809180c5b8fe2fc7403
/**
* Simple timer class which count up until stopped.
* Inspired by {#link android.os.CountDownTimer}
*/
public abstract class CountUpTimer {
private final long interval;
private long base;
public CountUpTimer(long interval) {
this.interval = interval;
}
public void start() {
base = SystemClock.elapsedRealtime();
handler.sendMessage(handler.obtainMessage(MSG));
}
public void stop() {
handler.removeMessages(MSG);
}
public void reset() {
synchronized (this) {
base = SystemClock.elapsedRealtime();
}
}
abstract public void onTick(long elapsedTime);
private static final int MSG = 1;
private Handler handler = new Handler() {
#Override
public void handleMessage(Message msg) {
synchronized (CountUpTimer.this) {
long elapsedTime = SystemClock.elapsedRealtime() - base;
onTick(elapsedTime);
sendMessageDelayed(obtainMessage(MSG), interval);
}
}
};
}

how to get value from countdowntimer and display into toast

i have countdown timer from 1 to 9999 if i click start button the count will start, but if click stop button i need to get current value from countdown and display that value in toast but the countdown could not stop if i click stop button please help me
private CountDownTimer countDownTimer;
private boolean timerHasStarted = false;
private Button startB;
public TextView ;
private final long startTime = 9999 * 1;
private final long interval = 1 *1 ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startB = (Button) this.findViewById(R.id.button);
startB.setOnClickListener(this);
text = (TextView) this.findViewById(R.id.timer);
countDownTimer = new MyCountDownTimer(startTime, interval);
text.setText(text.getText() + String.valueOf(startTime / 1));
}
public void onClick(View v) {
if (!timerHasStarted) {
countDownTimer.start();
timerHasStarted = true;
startB.setText("STOP");
} else {
/*countDownTimer.cancel();
timerHasStarted = false;
startB.setText("RESTART");*/
}
}
public class MyCountDownTimer extends CountDownTimer {
public MyCountDownTimer(long startTime, long interval) {
super(startTime, interval);
}
#Override
public void onFinish() {
//text.setText("Time's up!");
countDownTimer.start();
}
#Override
public void onTick(long millisUntilFinished) {
text.setText("" + millisUntilFinished / 1);
}
}
thank you

Here is my countdown timer:
QuestionCountdownTimer
public class QuestionCountdownTimer extends CountDownTimer {
private TextView remainingTimeDisplay;
private Context context;
public QuestionCountdownTimer(Context context,long millisInFuture, long countDownInterval,TextView remainingTimeDisplay) {
super(millisInFuture, countDownInterval);
this.context = context;
this.remainingTimeDisplay = remainingTimeDisplay;
}
#Override
public void onTick(long millisUntilFinished) {
long millis = millisUntilFinished;
String hms = String.format("%02d:%02d",
TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));
remainingTimeDisplay.setText(hms);
}
#Override
public void onFinish() {
Toast.makeText(context,"COUNTDOWN FINISH :)",Toast.LENGTH_SHORT).show();
}
}
Note:
TextView remainingTimeDisplay
remainingTimeDisplay.setText(hms);
I use it to display the remaining time using a TextView
Here I call the timer:
//Start Quiz timer
QuestionCountdownTimer timer = new QuestionCountdownTimer(this,10000, 1000, remainingTimeDisplay);
timer.start();
-first parameter: this - I use it for context to show Toast message
-second parameter: 10000 - total time (10 sec)
-third parameter: 1000 - countdown interval (1 sec)
-last parameter: dispaly remaining time in real time
Tested and working

Create your CountDownTimer like this:
public class MyCountDownTimer extends CountDownTimer
{
private long timePassed = 0;
public MyCountDownTimer(long startTime, long interval)
{
super(startTime, interval);
}
#Override
public void onFinish()
{
//text.setText("Time's up!");
countDownTimer.start();
}
#Override
public void onTick(long millisUntilFinished)
{
timePassed++;
text.setText("" + millisUntilFinished / 1);
}
public long getTimePassed()
{
return timePassed;
}
}
And on your onClick just do:
((MyCoundDownTimer) countDownTimer).getTimePassed();
to retrieve the time and set your textview text to it.

You should use handler
private Handler tickResponseHandler = new Handler() {
public void handleMessage(Message msg) {
int time = msg.what;
//make toast or do what you want
}
}
and pass it to MyCountDownTimer constructor
private Handler handler;
public MyCountDownTimer(long startTime, long interval, Handler handler) {
super(startTime, interval);
this.handler = handler;
}
And send message
#Override
public void onTick(long millisUntilFinished) {
text.setText("" + millisUntilFinished / 1);
Message msg = new Message();
msg.what = millisUntilFinished/1;
handler.sendMessage(msg);
}
That's all you need to do :)

Android edit system files

I've recently started working on my first application for android, and I'm a bit stuck. My application uses the CountDownTimer class, which, it seems, malfuncions - CountDownTimer.cancel() doesn't work. I do know how to fix this by modifying the CountDownTimer.java file, but I don't have the permission to do so. I'm working in Android Studio. I couldn't find an explanation online, even though it seems quite a fundamental question, isn't it? Perhaps I'm not using the right terms?
Thank you very much for your help, and I apologize if my question's a bit ignorant haha.

Try this way :
public class Main extends Activity implements OnClickListener
{
private static final String tag = "Main";
private MalibuCountDownTimer countDownTimer;
private long timeElapsed;
private boolean timerHasStarted = false;
private Button startB;
private TextView text;
private TextView timeElapsedView;
private final long startTime = 50000;
private final long interval = 1000;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
startB = (Button) this.findViewById(R.id.button);
startB.setOnClickListener(this);
text = (TextView) this.findViewById(R.id.timer);
timeElapsedView = (TextView) this.findViewById(R.id.timeElapsed);
countDownTimer = new MalibuCountDownTimer(startTime, interval);
text.setText(text.getText() + String.valueOf(startTime));
}
#Override
public void onClick(View v)
{
if (!timerHasStarted)
{
countDownTimer.start();
timerHasStarted = true;
startB.setText("Start");
}
else
{
countDownTimer.cancel();
timerHasStarted = false;
startB.setText("RESET");
}
}
// CountDownTimer class
public class MalibuCountDownTimer extends CountDownTimer
{
public MalibuCountDownTimer(long startTime, long interval)
{
super(startTime, interval);
}
#Override
public void onFinish()
{
text.setText("Time's up!");
timeElapsedView.setText("Time Elapsed: " + String.valueOf(startTime));
}
#Override
public void onTick(long millisUntilFinished)
{
text.setText("Time remain:" + millisUntilFinished);
timeElapsed = startTime - millisUntilFinished;
timeElapsedView.setText("Time Elapsed: " + String.valueOf(timeElapsed));
}
}
}

Countdown timer with pause and resume

I want to do countdown timer with pause and restart.Now i am displaying countdown timer By implenting ontick() and onfinish().please help me out.HEre is th code for countdown timer
final CountDownTimer Counter1 = new CountDownTimer(timervalue1 , 1000)
{
public void onTick(long millisUntilFinished)
{
System.out.println("onTick method!"(String.valueOf(millisUntilFinished/1000)));long s1=millisUntilFinished;
}
public void onFinish()
{
System.out.println("Finished!");
}
}

in onTick method..save the milliseconds left
long s1=millisUntilFinished;
when you want to pause the timer use..
Counter.cancel();
when you want to resume create a new countdowntimer with left milliseconds..
timervalue=s1
counter= new Counter1();
counter.start();
See this link

I would add something to the onTick handler to save the progress of the timer in your class (number of milliseconds left).
In the onPause() method for the activity call cancel() on the timer.
In the onResume() method for the activity create a new timer with the saved number of milliseconds left.
Refer the below links
LINK
LINK

My first answer on stackOverFlow, hope it should help :) ...
This is how I solved the problem, control timer from Fragment, Bottomsheet, Service, Dialog as per your requirement, keep a static boolean variable to control.
declare in your Activity:
long presetTime, runningTime;
Handler mHandler =new Handler();
Runnable countDownRunnable;
Toast toastObj;
public static boolean shouldTimerRun = true;
TextView counterTv;
In onCreate:
presetTime =60000L;
runningTime= presetTime;
//setting up Timer
countDownRunnable=new Runnable() {
#Override
public void run() {
if (shouldTimerRun) //if false, it runs but skips counting
{
counterTv.setText(simplifyTimeInMillis(runningTime));
if (runningTime==0) {
deployToast("Task Completed"); //show toast on task completion
}
runningTime -= 1000;
presetTime = runningTime; //to resume the timer from last position
}
mHandler.postDelayed(countDownRunnable,1000); //simulating on-tick
}
};
mHandler.post(countDownRunnable); // Start our CountdownTimer
Now, whenever you want to pause the timer change the value of shouldTimerRun false and to resume make it true.
#Override
public void onResume() {
super.onResume();
shouldTimerRun=true;
}
#Override
public void onPause() {
super.onPause();
shouldTimerRun=false;
deployToast("Timer is paused !!");
}
Helping methods: (can be skipped)
public static String simplifyTimeInMillis(long time) {
String result="";
long difference = time;
long secondsInMilli = 1000;
long minutesInMilli = secondsInMilli * 60;
long hoursInMilli = minutesInMilli * 60;
if (difference<1000){
return "0";
}
if (difference>=3600000) {
result = result + String.valueOf(difference / hoursInMilli) + "hr ";
difference = difference % hoursInMilli;
}
if (difference>=60000) {
result = result + String.valueOf(difference / minutesInMilli) + "m ";
difference = difference % minutesInMilli;
}
if (difference>=1000){
result = result + String.valueOf(difference / secondsInMilli) + "s";
}
return result;
}
public void deployToast(String msg){
if (toastObj!=null)
toastObj.cancel();
toastObj = Toast.makeText(mContext,msg,Toast.LENGTH_SHORT);
toastObj.show();
}

I'm using two private vars in this case:
private long startPauseTime;
private long pauseTime = 0L;
public void pause() {
startPauseTime = System.currentTimeMillis();
}
public void resumen(){
pauseTime += System.currentTimeMillis() - startPauseTime;
}

I am afraid that it is not possible to pause or stop CountDownTimer and pausing or stopping in onTick has no effect whatsoever user TimerTask instead.
Set up the TimerTask
class UpdateTimeTask extends TimerTask {
public void run() {
long millis = System.currentTimeMillis() - startTime;
int seconds = (int) (millis / 1000);
int minutes = seconds / 60;
seconds = seconds % 60;
timeLabel.setText(String.format("%d:%02d", minutes, seconds));
}
}
if(startTime == 0L) {
startTime = evt.getWhen();
timer = new Timer();
timer.schedule(new UpdateTimeTask(), 100, 200);
}
You can add event listener's like this..
private Handler mHandler = new Handler();
...
OnClickListener mStartListener = new OnClickListener() {
public void onClick(View v) {
if (mStartTime == 0L) {
mStartTime = System.currentTimeMillis();
mHandler.removeCallbacks(mUpdateTimeTask);
mHandler.postDelayed(mUpdateTimeTask, 100);
}
}
};
OnClickListener mStopListener = new OnClickListener() {
public void onClick(View v) {
mHandler.removeCallbacks(mUpdateTimeTask);
}
};
For more refer to Android Documentation.

//This timer will show min:sec format and can be paused and resumed
public class YourClass extends Activity{
TextView timer;
CountDownTimer ct;
long c = 150000; // 2min:30sec Timer
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.YourXmlLayout);
timer = (TextView)findViewById(R.id.Yourtimer)
startTimer(); // it will start the timer
}
public void startTimer(){
ct = new CountDownTimer(c,1000) {
#Override
public void onTick(long millisUntilFinished) {
// Code to show the timer in min:sec form
// Here timer is a TextView so
timer.setText(""+String.format("%02d:%02d",millisUntilFinished/60000,(millisUntilFinished/1000)%60));
c = millisUntilFinished; // it will store millisLeft
}
#Override
public void onFinish() {
//your code here
}
};
ct.start();
}
/*===========================================================
*after creating this you can pause this by typing ct.cancel()
*and resume by typing startTimer()*/

public class MainActivity extends AppCompatActivity {
TextView textView;
CountDownTimer ctimer;
boolean runCountDown;
private long leftTime;
private static final long MILL_IN_FUTURE = 6000;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = findViewById(R.id.text_view);
textView.setText("Click to start");
textView.setOnClickListener(this::clickStartAndPauseAndResume);
leftTime = MILL_IN_FUTURE;
}
public void clickStartAndPauseAndResume(View view) {
if (!runCountDown) {
long time = (leftTime == 0 || leftTime == MILL_IN_FUTURE) ? MILL_IN_FUTURE : leftTime;
ctimer = new CountDownTimer(time, 1) {
#Override
public void onTick(long l) {
leftTime = l;
textView.setText(l + "ms");
}
#Override
public void onFinish() {
textView.setText("Done");
leftTime = 0;
runCountDown = false;
textView.postDelayed(new Runnable() {
#Override
public void run() {
textView.setText("Click to start");
}
}, 1000);
}
}.start();
runCountDown = true;
} else {
ctimer.cancel();
textView.setText(textView.getText() + "\n Click to resume");
runCountDown = false;
}
}
}

A nice and simple way to create a Pause/Resume for your CountDownTimer is to create a separate method for your timer start, pause and resume as follows:
public void timerStart(long timeLengthMilli) {
timer = new CountDownTimer(timeLengthMilli, 1000) {
#Override
public void onTick(long milliTillFinish) {
milliLeft=milliTillFinish;
min = (milliTillFinish/(1000*60));
sec = ((milliTillFinish/1000)-min*60);
clock.setText(Long.toString(min)+":"+Long.toString(sec));
Log.i("Tick", "Tock");
}
The timerStart has a long parameter as it will be reused by the resume() method below. Remember to store your milliTillFinished (above as milliLeft) so that you may send it through in your resume() method. Pause and resume methods below respectively:
public void timerPause() {
timer.cancel();
}
private void timerResume() {
Log.i("min", Long.toString(min));
Log.i("Sec", Long.toString(sec));
timerStart(milliLeft);
}
Here is the code for the button FYI:
startPause.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(startPause.getText().equals("Start")){
Log.i("Started", startPause.getText().toString());
startPause.setText("Pause");
timerStart(15*1000);
} else if (startPause.getText().equals("Pause")){
Log.i("Paused", startPause.getText().toString());
startPause.setText("Resume");
timerPause();
} else if (startPause.getText().equals("Resume")){
startPause.setText("Pause");
timerResume();
}

How can I pause the timer in android?

I have gone through the link http://dewful.com/?tag=basic-android-timer regarding the timer application in android. It is working fine. I need to add the pause button to stop the timer and a play button to start the timer again from where I stopped. Can I achieve that task?
My Code:
long timervalue = 50000;
CountDownTimer Counter1 = new CountDownTimer(timervalue, 1000)
{
public void onTick(final long millisUntilFinished)
{
time.setText(formatTime(millisUntilFinished));
pause.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Counter1.cancel();
}
}
);
resume.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Counter1.start();
timervalue = Long.parseLong(output);
System.out.println("paused timer value resumed"+timervalue);
Counter1.onTick(timervalue);
}
}
);
}
public void onFinish()
{
Counter1.cancel();
}
};
public String formatTime(long millis)
{
output = "00";
seconds = millis / 1000;
seconds = seconds % 60;
System.out.println("seconds here"+seconds);
String secondsD = String.valueOf(seconds);
System.out.println("secondsD here"+secondsD);
if (seconds <
10) secondsD = "0" + seconds;
System.out.println("secondsD here in if"+secondsD);
output = secondsD;
return output;
}
In the above code when resume button is clicked the timer is again starting from 50sec and I don't want like that. It should start from the time where I paused. Please help me regarding this...I am struggling for this since one week......
Will be really thankful for the help..........

public class TimerActivity extends Activity
{
EditText e1;
MyCount counter;
Long s1;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
e1=(EditText)findViewById(R.id.editText1);
counter= new MyCount(5000,1000);
counter.start();
}
public void asdf(View v)
{
switch(v.getId())
{
case R.id.button1: counter.cancel();
break;
case R.id.button2: counter= new MyCount(s1,1000);
counter.start();
}
}
public class MyCount extends CountDownTimer
{
public MyCount(long millisInFuture, long countDownInterval)
{
super(millisInFuture, countDownInterval);
}
#Override public void onFinish()
{
e1.setText("DONE");
}
#Override public void onTick(long millisUntilFinished)
{
s1=millisUntilFinished;
e1.setText("left:"+millisUntilFinished/1000);
}
}
}

public void time(long m){
timer=new CountDownTimer(m, 1000) {
public void onTick(long millisUntilFinished) {
tv_timer.setText(formatTime(millisUntilFinished));
}
public void onFinish() {
tv_timer.setText("done!");
}
}.start();
}
i have used this for timer and i have put button for pause and use this
case R.id.bT_PAUSE:
String s_time = null;
try{
if(Bt_pause.getText().equals("PAUSE")){
s_time=tv_timer.getText().toString();
timer.cancel();
String[] Pause_time=s_time.split(":");
m=Long.parseLong(Pause_time[0].trim());
n=Long.parseLong(Pause_time[1].trim());
m=(m*60)+n;
m=m*1000;
Bt_pause.setText("RESUME");
}else if(Bt_pause.getText().equals("RESUME")){
//min_longmillis=Long.parseLong(sss);
//min_longmillis=min_longmillis*1000*60;
//min_longmillis=m;
//timer.start();
Toast.makeText(this,String.valueOf(m),Toast.LENGTH_SHORT).show();
time(m);
Bt_pause.setText("PAUSE");
}
}catch(Exception e){
Toast.makeText(this,e.toString(),Toast.LENGTH_SHORT).show();
}
break;
and this for format time
public String formatTime(long millis) {
String output = "00:00";
long seconds = millis / 1000;
long minutes = seconds / 60;
seconds = seconds % 60;
minutes = minutes % 60;
String sec = String.valueOf(seconds);
String min = String.valueOf(minutes);
if (seconds < 10)
sec = "0" + seconds;
if (minutes < 10)
min= "0" + minutes;
output = min + " : " + sec;
return output;
}//formatTime