CODEWITHSUNDEEP
androidvideohandlerandroid-camera2
mafioso
mafioso

Reputation: 1632

Handler postDelayed - print every second something

I want to print the current second using a handler. I record a video for exactly 10 seconds and want to set the text of a TextView every second.

Recording 10 seconds works like that:

Handler handler = new Handler();
handler.postDelayed(new Runnable() {
    @Override
    public void run() {
           stopRecordingVideo();
    }
}, 11000);  // don't know why 11000 but it only works this way

After the 10 seconds the method stopRecordingVideo() gets executed. So how can I change the text every second of the TextView?

Upvotes: 5

Views: 8042

Answers (3)

mafioso
mafioso

Reputation: 1632

Working answer:

int t = 0;
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        t++;
        textView.setText(getString(R.string.formatted_time, t));
        if(t<10) {
            handler.postDelayed(this, 1000);
        }
    }
}, 1000);

Where formatted_time is something like that:

<string android:name="formatted_time">%d seconds</string>

Upvotes: 7

Fevly Pallar
Fevly Pallar

Reputation: 3109

Try this, basically do the increment in a worker thread, but updating the text view is done by main's thread handler.

 Thread worker= new Thread(new Runnable() {
         @Override
         public void run() {
            for (int i = 0; i < 10; i++) {
               try {
                  TimeUnit.SECONDS.sleep(1);
               } catch (InterruptedException e) {
                  e.printStackTrace();
               }
             // stop recording after 10 seconds
               if (i == 9) {

                  handler.post(new Runnable() {
                     @Override
                     public void run() {
                        stopRecordingVideo();
                     }
                  });
               }

              else{
                   // set text for each second
                  handler.post(new Runnable() {
                     @Override
                     public void run() {
                        textView.setText(String.valueOf(i+1));
                     }
                  });

               }
            }//ends for()

     worker.start()

Upvotes: 1

Dhaval Patel
Dhaval Patel

Reputation: 10299

To print text every second, you can use CountDownTimer. But if you want to achieve this with try below code: 

void startTime(){
    //Post handler after 1 second.
    handler.postDelayed(runnable, 1000);
}

int totalDelay=0;
Handler handler = new Handler();
Runnable runnable = new Runnable() {
    @Override
    public void run() {
        totalDelay++;   
        if(totalDelay<=10){
            //If total time is less then 10 second execute handler again after 1 second
            handler.postDelayed(runnable, 1000);
        }
        textView.setText(totalDelay+" Second");
    }
};

Upvotes: 2

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