Swipe screen left , right , top , bottom

Swipe screen left , right , top , bottom

In This example creating a Swipe screen example .Swipe screen left / right / top / bottom , an alert will show.

 

File : AndroidMainifest.xml

 

<?xml version="1.0" encoding="utf-8"?>
    package="com.android.swipe"
    android:versionCode="1"
    android:versionName="1.0" >
    <uses-sdk android:minSdkVersion="8" />
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name="com.androidexample.swipescreen.SwipeScreenExample" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

 

File : src/SwipeScreenExample.java

 

Create touch event with the use of SimpleGestureFilter class object

 

import com.android.swipe.R;
import com.androidexample.swipescreen.SimpleGestureFilter.SimpleGestureListener;
import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.widget.Toast;
public class SwipeScreenExample extends Activity implements SimpleGestureListener{
            private SimpleGestureFilter detector;
         
        @Override
            public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.swipe_screen);
         
                // Detect touched area
                detector = new SimpleGestureFilter(this,this);
        }
         
    @Override
    public boolean dispatchTouchEvent(MotionEvent me){
        // Call onTouchEvent of SimpleGestureFilter class
         this.detector.onTouchEvent(me);
       return super.dispatchTouchEvent(me);
    }
    @Override
     public void onSwipe(int direction) {
      String str = "";
     
      switch (direction) {
     
      case SimpleGestureFilter.SWIPE_RIGHT : str = "Swipe Right";
                                               break;
      case SimpleGestureFilter.SWIPE_LEFT :  str = "Swipe Left";
                                                     break;
      case SimpleGestureFilter.SWIPE_DOWN :  str = "Swipe Down";
                                                     break;
      case SimpleGestureFilter.SWIPE_UP :    str = "Swipe Up";
                                                     break;
     
      }
       Toast.makeText(this, str, Toast.LENGTH_SHORT).show();
     }
     
     @Override
     public void onDoubleTap() {
        Toast.makeText(this, "Double Tap", Toast.LENGTH_SHORT).show();
     }
         
  }

 

File : src/SimpleGestureFilter.java

 

import android.app.Activity;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
public class SimpleGestureFilter extends SimpleOnGestureListener{
     
         public final static int SWIPE_UP    = 1;
         public final static int SWIPE_DOWN  = 2;
         public final static int SWIPE_LEFT  = 3;
         public final static int SWIPE_RIGHT = 4;
         
         public final static int MODE_TRANSPARENT = 0;
         public final static int MODE_SOLID       = 1;
         public final static int MODE_DYNAMIC     = 2;
         
         private final static int ACTION_FAKE = -13; //just an unlikely number
         private int swipe_Min_Distance = 100;
         private int swipe_Max_Distance = 350;
         private int swipe_Min_Velocity = 100;
     
     private int mode             = MODE_DYNAMIC;
     private boolean running      = true;
     private boolean tapIndicator = false;
     
     private Activity context;
     private GestureDetector detector;
     private SimpleGestureListener listener;
     
     public SimpleGestureFilter(Activity context,SimpleGestureListener sgl) {
     
      this.context = context;
      this.detector = new GestureDetector(context, this);
      this.listener = sgl;
     }
     
     public void onTouchEvent(MotionEvent event){
     
       if(!this.running)
      return;
     
       boolean result = this.detector.onTouchEvent(event);
     
       if(this.mode == MODE_SOLID)
        event.setAction(MotionEvent.ACTION_CANCEL);
       else if (this.mode == MODE_DYNAMIC) {
     
         if(event.getAction() == ACTION_FAKE)
           event.setAction(MotionEvent.ACTION_UP);
         else if (result)
           event.setAction(MotionEvent.ACTION_CANCEL);
         else if(this.tapIndicator){
          event.setAction(MotionEvent.ACTION_DOWN);
          this.tapIndicator = false;
         }
     
       }
       //else just do nothing, it's Transparent
     }
     
     public void setMode(int m){
      this.mode = m;
     }
     
     public int getMode(){
      return this.mode;
     }
     
     public void setEnabled(boolean status){
      this.running = status;
     }
     
     public void setSwipeMaxDistance(int distance){
      this.swipe_Max_Distance = distance;
     }
     
     public void setSwipeMinDistance(int distance){
      this.swipe_Min_Distance = distance;
     }
     
     public void setSwipeMinVelocity(int distance){
      this.swipe_Min_Velocity = distance;
     }
     
     public int getSwipeMaxDistance(){
      return this.swipe_Max_Distance;
     }
     
     public int getSwipeMinDistance(){
      return this.swipe_Min_Distance;
     }
     
     public int getSwipeMinVelocity(){
      return this.swipe_Min_Velocity;
     }
     
     @Override
         public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
           float velocityY) {
         
          final float xDistance = Math.abs(e1.getX() - e2.getX());
          final float yDistance = Math.abs(e1.getY() - e2.getY());
         
          if(xDistance > this.swipe_Max_Distance || yDistance > this.swipe_Max_Distance)
           return false;
         
          velocityX = Math.abs(velocityX);
          velocityY = Math.abs(velocityY);
                boolean result = false;
         
          if(velocityX > this.swipe_Min_Velocity && xDistance > this.swipe_Min_Distance){
           if(e1.getX() > e2.getX()) // right to left
            this.listener.onSwipe(SWIPE_LEFT);
           else
            this.listener.onSwipe(SWIPE_RIGHT);
         
           result = true;
          }
          else if(velocityY > this.swipe_Min_Velocity && yDistance > this.swipe_Min_Distance){
           if(e1.getY() > e2.getY()) // bottom to up
            this.listener.onSwipe(SWIPE_UP);
           else
            this.listener.onSwipe(SWIPE_DOWN);
         
           result = true;
          }
         
           return result;
         }
     
     @Override
     public boolean onSingleTapUp(MotionEvent e) {
      this.tapIndicator = true;
      return false;
     }
     
     @Override
     public boolean onDoubleTap(MotionEvent arg) {
      this.listener.onDoubleTap();;
      return true;
     }
     
     @Override
     public boolean onDoubleTapEvent(MotionEvent arg) {
      return true;
     }
     
     @Override
     public boolean onSingleTapConfirmed(MotionEvent arg) {
     
      if(this.mode == MODE_DYNAMIC){        // we owe an ACTION_UP, so we fake an
         arg.setAction(ACTION_FAKE);      //action which will be converted to an ACTION_UP later.
         this.context.dispatchTouchEvent(arg);
      
     
      return false;
     }
     
        static interface SimpleGestureListener{
         void onSwipe(int direction);
         void onDoubleTap();
     }
     
    }
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