MaterialUtils.java 文件源码

private Drawable buildRatingBarDrawables(Bitmap[] images) {
    final int[] requiredIds = { android.R.id.background, android.R.id.secondaryProgress, android.R.id.progress };
    final float[] roundedCorners = new float[] { 5, 5, 5, 5, 5, 5, 5, 5 };
    Drawable[] pieces = new Drawable[3];
    for (int i = 0; i < 3; i++) {

        ShapeDrawable sd = new ShapeDrawable(new RoundRectShape(roundedCorners, null, null));

        BitmapShader bitmapShader = new BitmapShader(images[i], Shader.TileMode.REPEAT, Shader.TileMode.CLAMP);
        sd.getPaint().setShader(bitmapShader);

        ClipDrawable cd = new ClipDrawable(sd, Gravity.LEFT, ClipDrawable.HORIZONTAL);
        if (i == 0) {
            pieces[i] = sd;
        } else {
            pieces[i] = cd;
        }
    }
    LayerDrawable ld = new LayerDrawable(pieces);
    for (int i = 0; i < 3; i++) {
        ld.setId(i, requiredIds[i]);
    }
    return ld;
}