ProgressDrawableBase.java 文件源码

public ProgressDrawableBase(Context context) {
    int colorControlActivated = DialogUtils.resolveColor(context, R.attr.colorControlActivated);
    // setTint() has been overridden for compatibility; DrawableCompat won't work because
    // wrapped Drawable won't be Animatable.
    setTint(colorControlActivated);
}