Question

I am facing 2 problems.

Questions are listed in picture above.

And main code snippets like this:
My device has a 1024×600 resolution.

Engine:

    this.mCamera = new Camera(0, 0,*device'width*,*device'height*);     
final EngineOptions engineOptions = new EngineOptions(true,     ScreenOrientation.LANDSCAPE_FIXED, new FillResolutionPolicy(), this.mCamera);
    engineOptions.getTouchOptions().setNeedsMultiTouch(true);

Background:

BitmapTextureAtlas bta = new BitmapTextureAtlas(mGame.getTextureManager(),WIDTH_SCENE_PNG,HEIGHT_SCENE_PNG, TextureOptions.BILINEAR);
ITextureRegion it = BitmapTextureAtlasTextureRegionFactory.createFromResource(bta, mGame, R.drawable.bg_main, 0, 0);
bta.load();
final Sprite sprite = new Sprite(0, 0,*device'width*,*device'height*,it, mGame.getVertexBufferObjectManager());
SpriteBackground bg = new SpriteBackground(sprite);
bg.setColor(Color.PINK);
setBackground(bg);

Sprites:

    BitmapTextureAtlas btaTools = new BitmapTextureAtlas(mGame.getTextureManager(), 30, 40);
ITextureRegion itDelete = BitmapTextureAtlasTextureRegionFactory.createFromResource(btaTools, c, R.drawable.sprite_delete,0,0);
    btaTools.load();

Answer 1

I fixed my problem.

The point is that I moved my resources(png images) from project’s drawable-hdpi folder to drawable foler, sprites look nice then.

raw or asset folders are also OK.
Your answer is also helpful for me.Thank you! @Christoph