ViewAnimator - Android Widgets Example

package com.myapp;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ViewAnimator;

public class MainActivity extends Activity {

	Button next;
    Button previous;
    ViewAnimator va;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        va = (ViewAnimator) findViewById(R.id.viewAnimator1);

        final Animation in = AnimationUtils.loadAnimation(this,
                android.R.anim.slide_in_left);
        final Animation out = AnimationUtils.loadAnimation(this,
                android.R.anim.slide_out_right);
   
        va.setInAnimation(in);
        va.setOutAnimation(out);
        
        va.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	va.showNext();
	        }
	    });
        
        Button btn1 = (Button) findViewById(R.id.button1);
        btn1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	va.showPrevious();
            }
        });
        
        Button btn2 = (Button) findViewById(R.id.button2);
        btn2.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	va.showNext();
            }
        });        
      
    }

	@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
	
}

        arrList.add("String 1 String 1 String 1 String 1");
        arrList.add("String 2 String 2 String 2 String 2");
        arrList.add("String 3 String 3 String 3 String 3");
        arrList.add("String 4 String 4 String 4 String 4");
        arrList.add("String 5 String 5 String 5 String 5");

package com.myapp;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.MotionEvent;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.widget.TextView;
import android.widget.ViewAnimator;

public class MainActivity extends Activity implements OnGestureListener {
	ViewAnimator va;
	GestureDetector gd;
	TextView tv1;
	
	ArrayList<String> arrList = new ArrayList<String>();
	
	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;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
        arrList.add("String 1 String 1 String 1 String 1");
        arrList.add("String 2 String 2 String 2 String 2");
        arrList.add("String 3 String 3 String 3 String 3");
        arrList.add("String 4 String 4 String 4 String 4");
        arrList.add("String 5 String 5 String 5 String 5");
        
		va = new ViewAnimator(this);
		
    	Animation inAnim = new AlphaAnimation(0, 1);
    	inAnim.setDuration(1000);
    	Animation outAnim = new AlphaAnimation(1, 0);
    	outAnim.setDuration(1000);
		va.setInAnimation(inAnim);
		va.setOutAnimation(outAnim);
		
		for(i=0;i<arrList.size();i++)
		{
			tv1 = new TextView(this);
			tv1.setText(String.valueOf(arrList.get(i)));
			va.addView(tv1, 0);
		}

		gd = new GestureDetector(this, this);
		setContentView(va);
		
		va.setDisplayedChild(arrList.size()-1);
		position = arrList.size()-1;
	}

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

	public boolean onDown(MotionEvent arg0) {
		// TODO Auto-generated method stub
		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) {
	            	position--;
	            	if(position < 0)
	            	{
	            		position = arrList.size() - 1;
	            	} 	
	            	va.setDisplayedChild(position);

	            } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
	                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
	                //left to right flip
	            	position++;
	            	if(position > arrList.size() -1)
	            	{
	            		position = 0;
	            	}
	            	va.setDisplayedChild(position);

	           }
	        } catch (Exception e) {
	            // nothing
	        	return true;
	        }
	        
		return true;
	}

	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;
	}

}