Displaying the Gallery images in Android

Res folder layout--> activity_image_switcher.xml


<LinearLayout 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"
    android:orientation="vertical" >
<TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Images of Gallery" />
   
    <Gallery
        android:id="@+id/gallery1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp" />

    <ImageSwitcher
android:id="@+id/switcher1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true" />
      
</LinearLayout>

And the java for the MainActivity is as follows:

package com.example.imageswitcher;

import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.os.Handler;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;
public class ImageSwitcherActivity extends Activity implements ViewFactory
{
//---the images to display---
Integer[] imageIDs = {
R.drawable.pic1,
R.drawable.pic2,
R.drawable.pic3,
R.drawable.pic4,
R.drawable.pic5,
R.drawable.pic6,
R.drawable.pic7,
R.drawable.pic8,
R.drawable.pic9
};
private ImageSwitcher imageSwitcher;

// The Handler used for manage the Runnable that switch the images
    Handler m_Handler = new Handler();

    // The index of the current image
    int m_imageIndex = 0;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_switcher);

imageSwitcher = (ImageSwitcher) findViewById(R.id.switcher1);
imageSwitcher.setFactory(this);
// Create the Fade in animation
        Animation fadeIn = AnimationUtils.loadAnimation(this, android.R.anim.fade_in);
        fadeIn.setDuration(3000);
        // Create the Fade out animation
        Animation fadeOut = AnimationUtils.loadAnimation(this, android.R.anim.fade_out);
        fadeOut.setDuration(3000);
        // Assign the two animations to the ImageSwitcher
        imageSwitcher.setInAnimation(fadeIn);
        imageSwitcher.setOutAnimation(fadeOut);
     // Start the Runnable
        m_Handler.post(m_UpdateTimeTask);
       
Gallery gallery = (Gallery) findViewById(R.id.gallery1);
gallery.setAdapter(new ImageAdapter(this));
gallery.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent,
View v, int position, long id)
{
imageSwitcher.setImageResource(imageIDs[position]);
}
});
}
public View makeView()
{
ImageView imageView = new ImageView(this);
imageView.setBackgroundColor(0xFF000000);
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setLayoutParams(new
ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
return imageView;
}
Runnable m_UpdateTimeTask = new Runnable() {
        public void run() {
                // Set the Image to show
                imageSwitcher.setImageResource(imageIDs[m_imageIndex]);
                // Increment the index
                m_imageIndex++;
                // if necessary restart from the first image
                if(m_imageIndex > (imageIDs.length-1)){
                        m_imageIndex = 0;
                }
                // Set the execution after 5 seconds
                m_Handler.postDelayed(this, (5 * 1000));
        }
};
public class ImageAdapter extends BaseAdapter
{
private Context context;
private int itemBackground;
public ImageAdapter(Context c)
{
context = c;
//---setting the style---
TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
itemBackground = a.getResourceId(
R.styleable.Gallery1_android_galleryItemBackground, 0);
a.recycle();
}
//---returns the number of images---
public int getCount()
{
return imageIDs.length;
}
//---returns the item---
public Object getItem(int position)
{
return position;
}
//---returns the ID of an item---
public long getItemId(int position)
{
return position;
}
//---returns an ImageView view---
public View getView(int position, View convertView, ViewGroup parent)
{
ImageView imageView = new ImageView(context);
imageView.setImageResource(imageIDs[position]);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setLayoutParams(new Gallery.LayoutParams(150, 120));
imageView.setBackgroundResource(itemBackground);
return imageView;
}
}
}

And create a file in res/values naming attrs.xml:

<?xml version="1.0" encoding="utf-8"?>

<resources>

<declare-styleable name="Gallery1">

<attr name="android:galleryItemBackground" />

</declare-styleable>

</resources>

And add the images in the res/drawable .