title: image switching on button click
body: <p>I have tries to switch the images on button click..but i failed and got the errors
  Here is my code....please somebody help me!!
  please add XML code if required also please post the same also</p>
  
  <pre><code>package com.conn;
  
  import android.app.Activity;
  import android.os.Bundle;
  import android.util.Log;
  import android.view.View;
  import android.view.ViewGroup.LayoutParams;
  import android.view.animation.Animation;
  import android.view.animation.AnimationUtils;
  import android.widget.Button;
  import android.widget.ImageSwitcher;
  import android.widget.ImageView;
  import android.widget.LinearLayout;
  import android.widget.ViewSwitcher.ViewFactory;
  
  public class image_slider extends Activity
  {
  
          Integer[] imageIDs = { R.drawable.haha,  R.drawable.dte,R.drawable.new_login };
          private ImageSwitcher imageSwitcher;
          private Button nextButton;
          private Button previousButton; 
  
          @Override
          public void onCreate(Bundle savedInstanceState)
          {
              super.onCreate(savedInstanceState);
              setContentView(R.layout.imgslide);
              imageSwitcher.setImageResource(imageIDs[0]);
              nextButton = (Button) findViewById(R.id.next);
              nextButton.setOnClickListener(new View.OnClickListener()
              {
                  public void onClick(View v)
                  {
                      final Animation out= AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right);       
                      final Animation in= AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left);     
                      imageSwitcher = (ImageSwitcher) findViewById(R.id.switcher1);      
                      imageSwitcher.setFactory(this);   
                      imageSwitcher.setInAnimation(in);      
                      imageSwitcher.setOutAnimation(out);             
                      imageSwitcher.setImageResource(imageIDs[1]);
  //                  imageSwitcher.setImageResource(imageIDs[1]);
  
                  }
  
              }); 
  
              previousButton = (Button) findViewById(R.id.previous);
              previousButton.setOnClickListener(new View.OnClickListener()
              {
                  public void onClick(View v)
                  {
                      final Animation out= AnimationUtils.loadAnimation(this, android.R.anim.slide_out_left);
                      final Animation in= AnimationUtils.loadAnimation(this, android.R.anim.slide_in_right);
                      imageSwitcher.setFactory(this);
                      imageSwitcher.setInAnimation(in);
                      imageSwitcher.setOutAnimation(out);
                      imageSwitcher.setImageResource(imageIDs[0]);
  
                  }
  
              });
          }
  public View makeView()
      {
          ImageView imageView = new ImageView(this);
          imageView.setBackgroundColor(0xFF000000);
                  imageView.setScaleType(ImageView.ScaleType.CENTER);
          imageView.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
          return imageView;
      }       
  
  }
  </code></pre>