Hello To Live Wallpaper: Playing With Background Color Circles

Step 1: Download the source code of  print hello - Download

Step 2: Now open directory HelloToLivewallpaper>app>src>main>java>com>example>hellotolivewallpaper>

package com.example.hellotolivewallpaper;

import android.util.DisplayMetrics;
import android.util.Log;
import android.view.WindowManager;

import org.andengine.engine.camera.Camera;
import org.andengine.engine.options.EngineOptions;
import org.andengine.engine.options.ScreenOrientation;
import org.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy;
import org.andengine.entity.scene.IOnSceneTouchListener;
import org.andengine.entity.scene.Scene;
import org.andengine.entity.scene.background.Background;
import org.andengine.entity.sprite.AnimatedSprite;
import org.andengine.extension.ui.livewallpaper.BaseLiveWallpaperService;
import org.andengine.input.touch.TouchEvent;
import org.andengine.opengl.texture.TextureOptions;
import org.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas;
import org.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlasTextureRegionFactory;
import org.andengine.opengl.texture.region.ITiledTextureRegion;
import org.andengine.util.adt.color.Color;

import java.io.IOException;

public class HelloToLiveWallpaperService extends BaseLiveWallpaperService implements IOnSceneTouchListener
{
    private static final String TAG = "HelloTo";

    private static float CAMERA_WIDTH = 480;
    private static float CAMERA_HEIGHT = 800;

    private Scene mScene;
    private ITiledTextureRegion mCircleTR;

    @Override
    public EngineOptions onCreateEngineOptions()
    {
        try
        {
            final DisplayMetrics displayMetrics = new DisplayMetrics();
            WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
            wm.getDefaultDisplay().getMetrics(displayMetrics);
            wm.getDefaultDisplay().getRotation();
            CAMERA_WIDTH = displayMetrics.widthPixels;
            CAMERA_HEIGHT = displayMetrics.heightPixels;
        } catch (Exception e)
        {
            Log.e(TAG, "onCreateEngineOptions " + e.toString());
        }

        //create a camera
        Camera mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);

        //engine options
        return new EngineOptions(true, ScreenOrientation.PORTRAIT_FIXED, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), mCamera);
    }

    @Override
    public void onCreateResources(OnCreateResourcesCallback pOnCreateResourcesCallback) throws IOException
    {
        //create texture
        BitmapTextureAtlas textureAtlas = new BitmapTextureAtlas(getTextureManager(), 216, 72, TextureOptions.BILINEAR);
        this.mCircleTR = BitmapTextureAtlasTextureRegionFactory.createTiledFromAsset(textureAtlas, getAssets(), "gfx/circle_rgb.png", 0, 0, 3, 1);
        this.getEngine().getTextureManager().loadTexture(textureAtlas);

        pOnCreateResourcesCallback.onCreateResourcesFinished();
    }

    @Override
    public void onCreateScene(OnCreateSceneCallback pOnCreateSceneCallback) throws IOException
    {
        //create a scene
        mScene = new Scene();

        //create a white background
        mScene.setBackground(new Background(Color.WHITE));

        //create red sprites
        AnimatedSprite mRedSprite = new AnimatedSprite(CAMERA_WIDTH / 3, CAMERA_HEIGHT / 2, mCircleTR, this.getVertexBufferObjectManager())
        {
            @Override
            public boolean onAreaTouched(TouchEvent pSceneTouchEvent, float pTouchAreaLocalX, float pTouchAreaLocalY)
            {
                mScene.setBackground(new Background(Color.RED));
                return true;
            }
        };

        //create green sprite
        AnimatedSprite mGreenSprite = new AnimatedSprite(CAMERA_WIDTH / 2, CAMERA_HEIGHT / 2, mCircleTR, this.getVertexBufferObjectManager())
        {
            @Override
            public boolean onAreaTouched(TouchEvent pSceneTouchEvent, float pTouchAreaLocalX, float pTouchAreaLocalY)
            {
                mScene.setBackground(new Background(Color.GREEN));
                return true;
            }
        };

        //create blue sprite
        AnimatedSprite mBlueSprite = new AnimatedSprite(2 * CAMERA_WIDTH / 3, CAMERA_HEIGHT / 2, mCircleTR, this.getVertexBufferObjectManager())
        {
            @Override
            public boolean onAreaTouched(TouchEvent pSceneTouchEvent, float pTouchAreaLocalX, float pTouchAreaLocalY)
            {
                mScene.setBackground(new Background(Color.BLUE));
                return true;
            }
        };

        //set particular texture tiles
        mRedSprite.setCurrentTileIndex(0);
        mGreenSprite.setCurrentTileIndex(1);
        mBlueSprite.setCurrentTileIndex(2);

        //attach our sprites to the scene
        mScene.attachChild(mRedSprite);
        mScene.attachChild(mGreenSprite);
        mScene.attachChild(mBlueSprite);

        //register sprites touch areas
        mScene.registerTouchArea(mRedSprite);
        mScene.registerTouchArea(mGreenSprite);
        mScene.registerTouchArea(mBlueSprite);

        //register scene touch listener
        mScene.setOnSceneTouchListener(this);

        pOnCreateSceneCallback.onCreateSceneFinished(mScene);
    }

    @Override
    public void onPopulateScene(Scene pScene, OnPopulateSceneCallback pOnPopulateSceneCallback) throws IOException
    {
        pOnPopulateSceneCallback.onPopulateSceneFinished();
    }

    @Override
    public boolean onSceneTouchEvent(Scene pScene, TouchEvent pSceneTouchEvent)
    {
        //handling scene touch event
        if (pScene == mScene)
        {
            mScene.setBackground(new Background(Color.WHITE));
        }

        return false;
    }
}

Step 3: Now replace the code of HelloToLiveWallpaperService.java with this code.

circle_rgb.png

Step 4: Add graphical resources in  HelloToLivewallpaper>app>src>main>assets>gfx>

Run the app...

Output:

HAPPY CODING...