How to use delay functions in Android Studio?

Question

I want to send a character with Bluetooth. The code works perfectly when there is only a single character.But I want to use a delay function between the two codes. I want to enter any number with EditText and the app will take that number and do EditText/44. That is what I want to wait between 2 codes

Finally work.. Thanks guys. :)

I moved a,b,c inside setOnClick.. ;

kileri = (Button) findViewById(R.id.kileri);
final EditText value1 = (EditText) findViewById(R.id.textkont);
assert value1 != null;
value1.setText("0");


btAdapter = BluetoothAdapter.getDefaultAdapter();
checkBTState();

kileri.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            int a = Integer.parseInt(value1.getText().toString());
            int b = a / 44;
            int c = b * 1000;

            sendData("F");

            try {
                Thread.sleep(c);

            } catch (Exception e) {
                e.printStackTrace();
            }

"I try lots of things but i failure." Please show what you have tried, and describe the way in which they didn't work. — Andy Turner, May 19 '16 at 12:23
Are you entering a value greater than or equal to 44 into `value1`? — Andy Turner, May 19 '16 at 12:24
@AndyTurner yes I enter 100 or 200. I have a problem with Edittext. App cant take number from that. When I write a number instead of 'c' most of delay function is work — R.Sahin Altunbas, May 19 '16 at 13:03

score 14 · Answer 1 · edited Mar 06 '19 at 10:54

14

You can use handler

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

            @Override
            public void run() {
                //do something
            }
        }, 2000 );//time in milisecond

edited Mar 06 '19 at 10:54

Sanjeev S

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answered May 19 '16 at 12:32

Krishna

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this is preferred way for doing `Handler` is designed for that – N J May 19 '16 at 12:34
it send character without wait too. – R.Sahin Altunbas May 19 '16 at 12:43
increase time delay say 15 seconds or 20 sec – Krishna May 19 '16 at 12:46
If i write a number like 3000 it work , but when i write 'c' didn't work. I want to wait Edittext/44 . I think I have a problem with Edittext. – R.Sahin Altunbas May 19 '16 at 13:00
Don't write 'c' let me know how many seconds you want to wait? – Krishna May 19 '16 at 13:06
Not a constant. I want a different number with Edittext. – R.Sahin Altunbas May 19 '16 at 14:25

Vanraj Ghed · Accepted Answer · 2016-05-19T12:32:52.770

5

 try {
       //set time in mili
        Thread.sleep(3000);

    }catch (Exception e){
        e.printStackTrace();
    }

edited as your code

 kileri.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            sendData("F");
            try {
                //set time in mili
                Thread.sleep(3000);

            }catch (Exception e){
                e.printStackTrace();
            }
            sendData("S");
        }
    });

edited May 19 '16 at 12:32

answered May 19 '16 at 12:25

Vanraj Ghed

1,261
11
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Where I write sendData("S"); ? – R.Sahin Altunbas May 19 '16 at 12:30
after try catch u can write sendData("S"); – Vanraj Ghed May 19 '16 at 12:31
Thanks i will try that. – R.Sahin Altunbas May 19 '16 at 12:32
@R.SahinAltunbas 3000 is equal to 3 Second u can set your time like 100/200/300 mili second as per your requirment – Vanraj Ghed May 19 '16 at 12:34
If i write a number like 3000 it work , but when i write 'c' didn't work. I want to wait Edittext/44 . – R.Sahin Altunbas May 19 '16 at 12:41
@R.SahinAltunbas first of all check the value of c maybe it c value is Zero(0) – Vanraj Ghed May 19 '16 at 12:43
I enter a integer on Edittext. I write 500 but it didn't work. Can you check my code ? – R.Sahin Altunbas May 19 '16 at 12:54
I think I have a problem with Edittext. When I write a number instead of 'c' most of delay function is work. – R.Sahin Altunbas May 19 '16 at 13:01
You shouldn't ever sleep on the UI or main thread as you would cause an AAR. – sixones Mar 25 '19 at 14:28

score 2 · Answer 3 · answered May 19 '16 at 12:42

2

Use handler like this:

new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            // do something after 2s = 2000 miliseconds
        }
    }, 2000); //Time in milisecond

answered May 19 '16 at 12:42

Jay

21
7

It work too but when i write 'c' instead of 2000 dont work. – R.Sahin Altunbas May 19 '16 at 13:05

score 0 · Answer 4 · answered May 19 '16 at 12:27

You can do like this

kileri = (Button) findViewById(R.id.kileri);
final EditText value1 = (EditText) findViewById(R.id.textkont);
assert value1 != null;
value1.setText("0");
final int a = Integer.parseInt(value1.getText().toString());
final int b = a/22;
final int c = b/2; // It will take a int from Edittext and do this operation on that.


btAdapter = BluetoothAdapter.getDefaultAdapter();
checkBTState();

kileri.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {
        sendData("F");
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                sendData("S");    
            }
        }, c);    
    }
});

I try this, But it send character without wait. – R.Sahin Altunbas May 19 '16 at 12:30 — R.Sahin Altunbas, May 19 '16 at 12:30

Iamat8 · Answer 5 · 2016-05-19T13:24:22.457

0

just use runOnUiThread on button click and post Handler after time delay..

  Button button = new Button(this);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            sendData("F");                   // send
            delay(2000);
        }
    });

UPDATE

delay()..

 public void delay(final int c){
    runOnUiThread(new Runnable() {
        @Override
        public void run() {
            try {
                Thread.sleep(c);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    });
    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            sendData("S");           //send
        }
    }, c);

}

edited May 19 '16 at 13:24

answered May 19 '16 at 12:41

Iamat8

3,888
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I want to wait c seconds. It work when i write number but when i write 'c' instead of 2000 dont work. – R.Sahin Altunbas May 19 '16 at 13:06
it say " Variable 'delay' is never assigned" , "Variable 'c' is already defined in the scope" and "Method call expected" for delay(2000); – R.Sahin Altunbas May 19 '16 at 13:39
Finally worked. I move int a,b,c to inside setOnClick.. then i work. Thanks. – R.Sahin Altunbas May 19 '16 at 14:46
your welcome i am glad it worked...you can upvote if my answer helped you in any manner...so it can help other having same problem... – Iamat8 May 19 '16 at 16:32

score 0 · Answer 6 · answered Oct 08 '20 at 10:43

It's not recommended to use Thread.Sleep because it stops execution of main thread if it is called in main thread execution.So,if we want to set delay we can use CountDownTimer.

In below snippet,we gave 2 seconds delay.So,after 2s onFinish() callback comes and we can have our operation there.

new CountDownTimer(2000, 1000) {
     public void onFinish() {
         
     }

 public void onTick(long millisUntilFinished) {
          
 }.start();
}

How to use delay functions in Android Studio?

6 Answers6

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