Lets develop a Christmas Card Gallery application. We will need to follow these steps :
Step 1: Create a new android project using motodev studios.
Step 2: Choose the name and SDK version for the app. Your AndroidManifest.xml will look
like this :

Step 3: Put your app launcher icon image into res/drawable folder.
Step 4: Open your res/layout/main.xml and put following code there :

Step 5 : Write your app name into res/value/String.xml

			
			
			Hello World
			Christmas Card gallery
			
		   

Step 6 : write following code in your MainActivity.java file

		package com.cardGallery;

		import android.app.Activity;
		import android.content.Context;
		import android.os.Bundle;
		import android.view.View;
		import android.view.ViewGroup;
		import android.widget.AdapterView;
		import android.widget.BaseAdapter;
		import android.widget.GridView;
		import android.widget.ImageView;
		import android.widget.Toast;
		import android.widget.AdapterView.OnItemClickListener;

		public class MainActivity extends Activity
		{
		//---the images to display---
		Integer[] imageIDs = {
		R.drawable.card1,
		R.drawable.card2,
		R.drawable.card3,
		R.drawable.card4,
		R.drawable.card5,
		R.drawable.card6,
		R.drawable.card7,
		R.drawable.card8,
		R.drawable.card9,
		R.drawable.card10,
		R.drawable.card11,
		R.drawable.card12,
		R.drawable.card13,
		R.drawable.card14,
		R.drawable.card15

		};

		@Override
		public void onCreate(Bundle savedInstanceState)
		{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		GridView gridView = (GridView) findViewById(R.id.cardview);
		gridView.setAdapter(new ImageAdapter(this));

		gridView.setOnItemClickListener(new OnItemClickListener()
		{
		public void onItemClick(AdapterView parent,
		View v, int position, long id)
		{
		Toast.makeText(getBaseContext(),
		"Card" + (position + 1) + " selected",
		Toast.LENGTH_SHORT).show();
		}
		});
		}

		public class ImageAdapter extends BaseAdapter
		{
		private Context context;

		public ImageAdapter(Context c)
		{
		context = c;
		}

		//---returns the number of images---
		public int getCount() {
		return imageIDs.length;
		}

		//---returns the ID of an item---
		public Object getItem(int position) {
		return position;
		}

		public long getItemId(int position) {
		return position;
		}

		//---returns an ImageView view---
		public View getView(int position, View convertView, ViewGroup parent)
		{
		ImageView imageView;
		if (convertView == null) {
		imageView = new ImageView(context);
		imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
		imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
		imageView.setPadding(5, 5, 5, 5);
		} else {
		imageView = (ImageView) convertView;
		}
		imageView.setImageResource(imageIDs[position]);
		return imageView;
		}
		}
		}
		

Step 7 : Run your application it will look like this.

Step 8 : In main menu your app icon will be shown like this :

Tags: alpha effect, An Android application, Android components, Android Game, animation in Android, Apple, Blinking effect, Christmas Card, Game Programming, Key Event, Key Event handler, Movement, Timer, Touch, TouchEvent