ImageSwitcher - Android Widgets Example

package com.myapp;

import android.app.ActionBar.LayoutParams;
import android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ViewSwitcher.ViewFactory;
import android.widget.Toast;

public class MainActivity extends Activity implements ViewFactory, OnGestureListener {

	GestureDetector gd;
	TextView tv1;
	
    private Integer[] mImageIds = {
            R.drawable.pic_a,
            R.drawable.pic_b,
            R.drawable.pic_c,
            R.drawable.pic_d,
            R.drawable.pic_e,
            R.drawable.pic_f,
            R.drawable.pic_g,
            R.drawable.pic_h,
            R.drawable.pic_i
    };
	
	private static final int SWIPE_MIN_DISTANCE = 120;
	private static final int SWIPE_MAX_OFF_PATH = 250;
	private static final int SWIPE_THRESHOLD_VELOCITY = 100;
	int position = 0;
	int i = 0;
	ImageSwitcher iSwitcher;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		
		
    	Animation inAnim = new AlphaAnimation(0, 1);
    	inAnim.setDuration(1000);
    	Animation outAnim = new AlphaAnimation(1, 0);
    	outAnim.setDuration(1000);
		
       // imageSwitcher1
		iSwitcher = (ImageSwitcher) findViewById(R.id.imageSwitcher1);
		iSwitcher.setFactory(this);
		iSwitcher.setInAnimation(inAnim);
		iSwitcher.setOutAnimation(outAnim);    
			
			iSwitcher.setImageResource(mImageIds[0]);
	
		
		gd = new GestureDetector(this, this);
	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {
		if (gd.onTouchEvent(event))
			return true;
		else
			return false;
	}

	public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
		
	       try {
	            if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
	                return false;
	            // right to left swipe
	            if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
	                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
	    			   setPositionNext();
	    			   iSwitcher.setImageResource(mImageIds[position]); 
	    			   Toast.makeText(MainActivity.this, getResources().getResourceName(mImageIds[position]), Toast.LENGTH_SHORT).show();

	            } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
	                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
	                //left to right flip
	            	setPositionPrev();
	            	iSwitcher.setImageResource(mImageIds[position]);
	            	Toast.makeText(MainActivity.this, getResources().getResourceName(mImageIds[position]), Toast.LENGTH_SHORT).show();
	           }
	        } catch (Exception e) {
	            // nothing
	        	return true;
	        }
	        
		return true;
	}

    public void setPositionNext()
    {
    	position++;
    	if(position > mImageIds.length -1)
    	{
    		position = 0;
    	}
    }
    
    public void setPositionPrev()
    {
    	position--;
    	if(position < 0)
    	{
    		position = mImageIds.length - 1;
    	} 	
    }
    
	public View makeView() {
		// TODO Auto-generated method stub
		ImageView iView = new ImageView(this);
		iView.setScaleType(ImageView.ScaleType.FIT_CENTER);
		iView.setLayoutParams(new 
				ImageSwitcher.LayoutParams(
						LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
		iView.setBackgroundColor(0xFF000000);
		return iView;
	}
	
	public boolean onDown(MotionEvent arg0) {
		// TODO Auto-generated method stub
		return false;
	}
	
	public void onLongPress(MotionEvent arg0) {
		// TODO Auto-generated method stub

	}

	public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,
			float arg3) {
		// TODO Auto-generated method stub
		return false;
	}

	public void onShowPress(MotionEvent arg0) {
		// TODO Auto-generated method stub

	}

	public boolean onSingleTapUp(MotionEvent arg0) {
		// TODO Auto-generated method stub
		return false;
	}

}

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
	
    <Gallery
        android:id="@+id/gallery1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    
        <ImageSwitcher
        android:id="@+id/imageSwitcher1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="100dp" >
    </ImageSwitcher>

</TableLayout>