performance - Android Live Wallpaper with canvas.drawBitmap is way to slow -

i started android programming week , curently working on live wallpaper.

i have 2 images, background image (720x1280 png) , slidebar (2276x290 png) slides right left in endles loop. problem slide 3-4fps 1 px per frame (on actual phone, on avd 1/3fps ), wich way choppy live wallpaper. code working fine far way slow.

it nice if know way "a lot" faster.

my code:

private class wengine extends engine {     private final handler handler = new handler();     private final runnable drawrunner = new runnable() {         @override         public void run() {             draw();         }      };     private paint paint = new paint();     private int width;     int height;     private boolean visible = true;     int x = -1;     int x2 = 0;     int y = -1;      public wengine() {         sharedpreferences prefs = preferencemanager                 .getdefaultsharedpreferences(wservice.this);         handler.post(drawrunner);      }      @override     public void onvisibilitychanged(boolean visible) {         this.visible = visible;         if (visible) {             handler.post(drawrunner);         } else {             handler.removecallbacks(drawrunner);         }     }      @override     public void onsurfacedestroyed(surfaceholder holder) {         super.onsurfacedestroyed(holder);         this.visible = false;         handler.removecallbacks(drawrunner);     }      @override     public void onsurfacechanged(surfaceholder holder, int format,             int width, int height) {         this.width = width;         this.height = height;         super.onsurfacechanged(holder, format, width, height);     }      private void draw() {         surfaceholder holder = getsurfaceholder();         canvas canvas = null;         resources res = getresources();         bitmap backgroundimg = bitmapfactory.decoderesource(res, r.drawable.background);         bitmap slidebarimg = bitmapfactory.decoderesource(res, r.drawable.slidebar);          try {             canvas = holder.lockcanvas();             canvas.drawbitmap(backgroundimg, 0, 0, paint);             if (canvas != null) {                 if (x<0 && y<0) {                      x = 0;                      y = math.round(height / 2);                  } else {                      x -= 1;                  }                  if (x - width < -height * 1.778125) {                     x2 -= 1;                  }                  if (x < -height * 1.778125) {                     x = x2;                     x2 = 0;                 }                  canvas.drawbitmap(slidebarimg, x, y, paint);                  if (x2 < 0) {                     canvas.drawbitmap(slidebarimg, x2, y, paint);                 }             }         } {             if (canvas != null)                 holder.unlockcanvasandpost(canvas);          }          handler.removecallbacks(drawrunner);         handler.postdelayed(drawrunner, 30);     } } 

edit:

after changing images jpg files 6 fps, thats still way slow.

edit 2:

i figured out hardwareaccceleration not possible while using .lockcanvas() there way draw image on livewallpaper (surfaceview) provides hardwareaccceleration?

private void draw() {     ...     bitmap backgroundimg = bitmapfactory.decoderesource(res, r.drawable.background);     bitmap slidebarimg = bitmapfactory.decoderesource(res, r.drawable.slidebar);     ... 

don't this. if you're decoding bitmaps in every frame, it's going slow. slow. doesn't matter if you're hardware accelerated or not. decode them once, , draw them on each frame.