Discussion :

[azaghal]

Bonjour,

je développe un fond d'écran animé composé d'une animation de trames.
Le fond d'écran se compose donc d'une animation de 20 fichiers png.

J'ai réussi à développer ce que je voulais mais j'ai un problème de performances... Comment pourrais-je améliorer tout cela ?

Je vous envoie le code du fichier principal ainsi que le projet eclipse

Code :

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package ca.jvsh.livewallpaper;
 
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.os.Handler;
import android.service.wallpaper.WallpaperService;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
 
public class LiveWallpaper extends WallpaperService
{
 
	public static final String	SHARED_PREFS_NAME	= "livewallpapersettings";
	private final Handler mHandler = new Handler();
	public Bitmap myBg;
	public int idx = 0;
	public static final int NUM_RES = 20;
 
 
	@Override
	public void onCreate() {
		super.onCreate();
	}
 
	@Override
	public void onDestroy() {
		super.onDestroy();
	}
 
	@Override
	public Engine onCreateEngine() {
		return new CubeEngine();
	}
 
	class CubeEngine extends Engine {
 
		private final Paint mPaint = new Paint();
		private boolean mAnime = true;
		private Matrix mMatrix = new Matrix();
 
		private final Runnable mDrawAnim = new Runnable() {
			@Override
			public void run() {
				drawFrame();
			}
		};
		private boolean mVisible;
 
 
		CubeEngine() {
			myBg = BitmapFactory.decodeResource(getResources(),R.drawable.n01);
		}
 
		@Override
		public void onCreate(SurfaceHolder surfaceHolder) {
			super.onCreate(surfaceHolder);
 
			setTouchEventsEnabled(false);
		}
 
		@Override
		public void onDestroy() {
			super.onDestroy();
			mHandler.removeCallbacks(mDrawAnim);
		}
 
		@Override
		public void onVisibilityChanged(boolean visible) {
			mVisible = visible;
			if (visible) {
				drawFrame();
			} else {
				mHandler.removeCallbacks(mDrawAnim);
			}
		}
 
		@Override
		public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) {
			super.onSurfaceChanged(holder, format, width, height);
 
			float w = myBg.getWidth();
			float s = width / w;
			mMatrix.reset();
			mMatrix.setScale(s, s);
			drawFrame();
		}
 
		@Override
		public void onSurfaceCreated(SurfaceHolder holder) {
			super.onSurfaceCreated(holder);
		}
 
		@Override
		public void onSurfaceDestroyed(SurfaceHolder holder) {
			super.onSurfaceDestroyed(holder);
			mVisible = false;
			mHandler.removeCallbacks(mDrawAnim);
		}
 
		@Override
		public void onOffsetsChanged(float xOffset, float yOffset,
				float xStep, float yStep, int xPixels, int yPixels) {
			drawFrame();
		}
 
 
		@Override
		public void onTouchEvent(MotionEvent event) {
			if (event.getAction() == MotionEvent.ACTION_MOVE) {
				mAnime = !mAnime;
			}
			super.onTouchEvent(event);
		}
 
 
		void drawFrame() {
			final SurfaceHolder holder = getSurfaceHolder();
 
			Canvas c = null;
			try {
				c = holder.lockCanvas();
				if (c != null) {
					// draw something
					drawAnim(c);
					//drawTouchPoint(c);
				}
			} finally {
				if (c != null) holder.unlockCanvasAndPost(c);
			}
 
			// Reschedule the next redraw
			mHandler.removeCallbacks(mDrawAnim);
			if (mVisible && mAnime) {
				mHandler.postDelayed(mDrawAnim, 50 );
			}
		}
 
 
		void drawAnim(Canvas c) {
 
			if (idx == NUM_RES) {idx = 0;}
			idx += 1;
			switch (idx) {
			    case 0: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n01), mMatrix, mPaint); break;
			    case 1: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n02), mMatrix, mPaint); break;
			    case 2: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n03), mMatrix, mPaint); break;
			    case 3: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n04), mMatrix, mPaint); break;
			    case 4: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n05), mMatrix, mPaint); break;
			    case 5: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n06), mMatrix, mPaint); break;
			    case 6: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n07), mMatrix, mPaint); break;
			    case 7: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n08), mMatrix, mPaint); break;
			    case 8: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n09), mMatrix, mPaint); break;
			    case 9: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n10), mMatrix, mPaint); break;
			    case 10: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n11), mMatrix, mPaint); break;
			    case 11: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n12), mMatrix, mPaint); break;
			    case 12: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n13), mMatrix, mPaint); break;
			    case 13: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n14), mMatrix, mPaint); break;
			    case 14: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n15), mMatrix, mPaint); break;
			    case 15: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n16), mMatrix, mPaint); break;
			    case 16: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n17), mMatrix, mPaint); break;
			    case 17: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n18), mMatrix, mPaint); break;
			    case 18: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n19), mMatrix, mPaint); break;
			    case 19: c.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.n20), mMatrix, mPaint); break;
 
 
 
			}
 
		}
 
 
 
	}
}