AbstractDrawableUtils.java 文件源码

/**
 * Sets a tint on top of the desired drawable
 *
 * @param drawable     source drawable to apply the tint
 * @param tintColorInt color int of the desired tint
 */
public static void setDrawableTint(@NonNull final Drawable drawable,
                                   @ColorInt final int tintColorInt) {
    /*
     * === FIXED ===
     * In the latest support library, DrawableCompat.wrap() is no longer needed
     *
     * There is an invalidation issue when setting drawable state on pre-lollipop devices,
     * even if using the DrawableCompat.setTint() method.  It appears to be google support
     * library issue.  The get around is to use DrawableCompat.wrap() to wrap the drawable
     * before setting tint color
     *
     * http://stackoverflow.com/questions/30872101
     * https://code.google.com/p/android/issues/detail?id=172067#c13
     * =============
     */
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
        /*
         * Tint ONLY the targeted drawable without affecting other drawables in the app.
         *
         * http://stackoverflow.com/questions/26788251
         */
        Drawable mutateDrawable = drawable.mutate();

        // Work for API 17 and below as well
        mutateDrawable.setColorFilter(tintColorInt, PorterDuff.Mode.SRC_IN);
    } else {
        DrawableCompat.setTint(drawable, tintColorInt);
    }
}