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<![CDATA[Android parmak hareketlerini algılama]]> https://vnextr.com/konu-android-parmak-hareketlerini-algilama--26201.html Mon, 25 Jan 2021 16:42:39 +0000 MerT Yılmaz]]> https://vnextr.com/konu-android-parmak-hareketlerini-algilama--26201.html Merhaba arkadaşlar,

Android ile geliştirdiğiniz uygulamalarda ekranda sağa, sola, yukarı ve aşağı parmak hareketlerini algılamak için aşağıdaki sınıftan faydalanabilirsiniz.

OnSwipeTouchListener.java :

Kod:
import android.view.GestureDetector;

import android.view.GestureDetector.SimpleOnGestureListener;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnTouchListener;

public class OnSwipeTouchListener implements OnTouchListener {

   private final GestureDetector gestureDetector;

   public OnSwipeTouchListener (Context ctx){

       gestureDetector = new GestureDetector(ctx, new GestureListener());

   }

   @Override

   public boolean onTouch(View v, MotionEvent event) {

       return gestureDetector.onTouchEvent(event);

   }

   private final class GestureListener extends SimpleOnGestureListener {

       private static final int SWIPE_THRESHOLD = 100;

       private static final int SWIPE_VELOCITY_THRESHOLD = 100;

       @Override

       public boolean onDown(MotionEvent e) {

           return true;

       }

       @Override

       public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {

           boolean result = false;

           try {

               float diffY = e2.getY() - e1.getY();

               float diffX = e2.getX() - e1.getX();

               if (Math.abs(diffX) > Math.abs(diffY)) {

                   if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {

                       if (diffX > 0) {

                           onSwipeRight();

                       } else {

                           onSwipeLeft();

                       }

                   }

                   result = true;

               }

               else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {

                       if (diffY > 0) {

                           onSwipeBottom();

                       } else {

                           onSwipeTop();

                       }

                   }

                   result = true;

           } catch (Exception exception) {

               exception.printStackTrace();

           }

           return result;

       }

   }

   public void onSwipeRight() {

   }

   public void onSwipeLeft() {

   }

   public void onSwipeTop() {

   }

   public void onSwipeBottom() {

   }

}

Kullanımı :

Kod:
imageView.setOnTouchListener(new OnSwipeTouchListener(MyActivity.this) {

   public void onSwipeTop() {

       Toast.makeText(MyActivity.this, "top", Toast.LENGTH_SHORT).show();

   }

   public void onSwipeRight() {

       Toast.makeText(MyActivity.this, "right", Toast.LENGTH_SHORT).show();

   }

   public void onSwipeLeft() {

       Toast.makeText(MyActivity.this, "left", Toast.LENGTH_SHORT).show();

   }

   public void onSwipeBottom() {

       Toast.makeText(MyActivity.this, "bottom", Toast.LENGTH_SHORT).show();

   }

});

]]> Merhaba arkadaşlar,

Android ile geliştirdiğiniz uygulamalarda ekranda sağa, sola, yukarı ve aşağı parmak hareketlerini algılamak için aşağıdaki sınıftan faydalanabilirsiniz.

OnSwipeTouchListener.java :

Kod:
import android.view.GestureDetector;

import android.view.GestureDetector.SimpleOnGestureListener;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnTouchListener;

public class OnSwipeTouchListener implements OnTouchListener {

   private final GestureDetector gestureDetector;

   public OnSwipeTouchListener (Context ctx){

       gestureDetector = new GestureDetector(ctx, new GestureListener());

   }

   @Override

   public boolean onTouch(View v, MotionEvent event) {

       return gestureDetector.onTouchEvent(event);

   }

   private final class GestureListener extends SimpleOnGestureListener {

       private static final int SWIPE_THRESHOLD = 100;

       private static final int SWIPE_VELOCITY_THRESHOLD = 100;

       @Override

       public boolean onDown(MotionEvent e) {

           return true;

       }

       @Override

       public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {

           boolean result = false;

           try {

               float diffY = e2.getY() - e1.getY();

               float diffX = e2.getX() - e1.getX();

               if (Math.abs(diffX) > Math.abs(diffY)) {

                   if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {

                       if (diffX > 0) {

                           onSwipeRight();

                       } else {

                           onSwipeLeft();

                       }

                   }

                   result = true;

               }

               else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {

                       if (diffY > 0) {

                           onSwipeBottom();

                       } else {

                           onSwipeTop();

                       }

                   }

                   result = true;

           } catch (Exception exception) {

               exception.printStackTrace();

           }

           return result;

       }

   }

   public void onSwipeRight() {

   }

   public void onSwipeLeft() {

   }

   public void onSwipeTop() {

   }

   public void onSwipeBottom() {

   }

}

Kullanımı :

Kod:
imageView.setOnTouchListener(new OnSwipeTouchListener(MyActivity.this) {

   public void onSwipeTop() {

       Toast.makeText(MyActivity.this, "top", Toast.LENGTH_SHORT).show();

   }

   public void onSwipeRight() {

       Toast.makeText(MyActivity.this, "right", Toast.LENGTH_SHORT).show();

   }

   public void onSwipeLeft() {

       Toast.makeText(MyActivity.this, "left", Toast.LENGTH_SHORT).show();

   }

   public void onSwipeBottom() {

       Toast.makeText(MyActivity.this, "bottom", Toast.LENGTH_SHORT).show();

   }

});

]]>