WoWoStateListColorAnimation.java 文件源码

private void setColors(View view, int[] colors) {
    Drawable drawable = view.getBackground();
    if (drawable instanceof StateListDrawable) {
        StateListDrawable stateListDrawable = (StateListDrawable) drawable;
        DrawableContainerState drawableContainerState = (DrawableContainerState) stateListDrawable.getConstantState();
        if (drawableContainerState != null) {
            Drawable[] drawables = drawableContainerState.getChildren();
            for (int i = 0; i < colors.length; i++) if (drawables[i] instanceof GradientDrawable) ((GradientDrawable) drawables[i]).setColor(colors[i]);
        }
    } else Log.w(TAG, "Drawable of view must be StateListDrawable in WoWoStateListColorAnimation");
}