Question

The problem: poor texture quality in android app written with Andengine(wraps opengl), especially on gradients which appear as steps in few colours. Problem occurs on real and virtual device

Settings: default texture, fullscreen, native resolution, android 2.2.
I have tried to enforce PixelFromat with:

public void onAttachedToWindow() {
    super.onAttachedToWindow();
    Window window = getWindow();
    window.setFormat(PixelFormat.RGBA_8888);
}

Haven’t made any difference.

Commenting line:
GLHelper.disableDither(pGL); helped a little with textures, but made particles look bad, so a guess it is not the source of problem.

Example loading code:

public static void loadResources(StreamgameActivity game) {
    magnetTexture = new BitmapTextureAtlas(512, 512, TextureOptions.BILINEAR);
    magnetTextureRegion = BitmapTextureAtlasTextureRegionFactory
       .createFromAsset(magnetTexture, game,"bateria128CMatte_none.png", 0, 0);
    game.getEngine().getTextureManager().loadTexture(magnetTexture);
}

Answer 1

Andengine seems to use be default 16bit rendering mode. To change that I have done:

this.mRenderSurfaceView = new RenderSurfaceView(this);
mRenderSurfaceView.setEGLConfigChooser(8,8,8,8,0,0);//!!
mRenderSurfaceView.setRenderer(mEngine);
mRenderSurfaceView.getHolder().setFormat(PixelFormat.RGBA_8888);//!!

in onSetContentView method.