如何设置叠加层的不透明度？ Android LayerDrawable

Question

        layers[0] = view.getDrawable();
        layers[1] = r.getDrawable(R.drawable.dr);

        LayerDrawable layerDrawable = new LayerDrawable(layers);
        int width = layerDrawable.getIntrinsicWidth();
        int height = layerDrawable.getIntrinsicHeight();
        Bitmap bitmap = Bitmap.createBitmap(width, height,  Bitmap.Config.RGB_565);
        Canvas canvas = new Canvas(bitmap);
        layerDrawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        layerDrawable.draw(canvas);

        view.setImageBitmap(bitmap);

还有其他方法吗？也许 PorterDuff.Mode？

Answer 1

可以看到this.

LayerDrawable 有设置alpha 的方法。这对你有帮助吗？