how to implement double click in android

Question

I am doing a project in which i want to display a particular message on single touch and another message on double touch using android.How can i implement it.

My sa

Answer 1

I have Implemented the code on which the Background color and text color changes on clicking the screen twice(Double Tap) here is the code...

        int i = 0;
        reader.setOnClickListener(new View.OnClickListener() {
            int i = 0;
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                i++;
                Handler handler = new Handler();
                Runnable r = new Runnable() {

                    @Override
                    public void run() {
                        i = 0;
                    }
                };

                if (i == 1) {
                    //Single click
                    handler.postDelayed(r, 250);
                } else if (i == 2) {

                    if(color==1) {

                        reader.setTextColor(0xFF000000);
                        reader.setBackgroundColor(0xFFFFFFFF);
                        color = 2;
                    }else if(color==2)
                    {
                        reader.setTextColor(0xFFFFFFFF);
                        reader.setBackgroundColor(0xFF000000);
                        color=1;
                    }
                    i = 0;

                }


            }
        });

Answer 2

Subclass View.OnClickListener

I have created a DoubleClickListener using an interface and a Thread. It can be used with any View just like classic ClickListener. This is how you can add my listener for double click events.

Example,

button.setOnClickListener(new DoubleTapListener(this));

And in any Activity, Override this method to perform task

@Override
public void onDoubleClick(View v) {
    // Do what you like
}

Implementation:

Let's see the implementation. I have created a simple DoubleTapListener but using this approach you can create complex touch listeners(Tripletouch Listener, single, double, triple listener all in one).

1) DoubleTapListener

public class DoubleTapListener  implements View.OnClickListener{

      private boolean isRunning= false;
      private int resetInTime =500;
      private int counter=0;

      private DoubleTapCallback listener;

      public DoubleTapListener(Context context)
      {
          listener = (DoubleTapCallback)context;             
      }

      @Override
      public void onClick(View v) {

         if(isRunning)
         {
            if(counter==1) //<-- makes sure that the callback is triggered on double click
            listener.onDoubleClick(v);
         }

         counter++;

         if(!isRunning)
         {
            isRunning=true;
            new Thread(new Runnable() {
                @Override
                public void run() {
                   try {
                      Thread.sleep(resetInTime);
                      isRunning = false;
                      counter=0;
                   } catch (InterruptedException e) {
                    e.printStackTrace();
                   }
                }
            }).start();
         }

      }

}

2) DoubleTapCallback

public interface DoubleTapCallback {

     public void onDoubleClick(View v);
}

3) Implement callback in your activity and override the method

public class MainActivity extends AppCompatActivity implements DoubleTapCallback{

      private Button button;       

      @Override
      protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);

            button   = (Button)findViewById(R.id.button);    
            button.setOnClickListener(new DoubleTapListener(this));  //<-- Set listener

      }

      @Override
      public void onDoubleClick(View v) {
            // Toast to show double click        
      }
 }

Relevant link:

You can see the full code implementation HERE

Answer 3

Why dont you use Long Press event insted while its Recommanded UI. Read Answer Here , I strongly recommand to use this.

Or if its anyhow you want to implement you have two options , one is this using boolean and second is using Gesture Listener.

Answer 4

You may employ RxAndroid in that case in Kotlin it shall be like this:

yourView.clicks().buffer(500, TimeUnit.MILLISECONDS, 2).filter {
    it.size >= 2
}.subscribe {
    // Handle double click
}

1. We apply clicks() extension function on a given view which creates an RX observable sequence.
2. We tell RX to emit an event after either 500 ms or 2 consecutive clicks take place within 500 ms.
3. We tell RX to take only the events only with 2 consecutive click
4. Last but not least we subscribe to the event sequence which is our DoubleClick handler

Answer 5

Try the below modified code::

//Check that thisTime is greater than prevTime
//just incase system clock reset to zero
static prevTime = 0;
thisTime = Calendar.getInstance().getTimeInMillis();
if(prevTime < thisTime) {
    //Check if times are within our max delay
    if((thisTime - prevTime) <= 1000) {  //1 SEC
        //We have detected a double tap!
        Toast.makeText(AddLocation.this, "DOUBLE TAP DETECTED!!!", Toast.LENGTH_LONG).show();
        prevTime = thisTime;
        //PUT YOUR LOGIC HERE!!!!
    } else {
        //Otherwise Reset firstTap
        firstTap = true;
    }
} else {
    firstTap = true;
}

Answer 6

It is hold, but,for new readers, I made a small library to simplify this kind of stuff, check this article: Double click listener on android.

The library is very small, and here is the GitHub Repository Link.

And you will just use it like this:

Button btn = new Button(this);

btn.setOnClickListener( new DoubleClick(new DoubleClickListener() {
        @Override
        public void onSingleClick(View view) {

            // Single tap here.
        }

        @Override
        public void onDoubleClick(View view) {

            // Double tap here.
        }
    });