ToolbarProcessor.java 文件源码

@SuppressWarnings("unchecked")
public static void tintMenu(@NonNull Toolbar toolbar, @Nullable Menu menu, final @ColorInt int color) {
    try {
        final Field field = Toolbar.class.getDeclaredField("mCollapseIcon");
        field.setAccessible(true);
        Drawable collapseIcon = (Drawable) field.get(toolbar);
        if (collapseIcon != null) {
            field.set(toolbar, TintHelper.createTintedDrawable(collapseIcon, color));
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    // credits: https://snow.dog/blog/how-to-dynamicaly-change-android-toolbar-icons-color/
    final PorterDuffColorFilter colorFilter = new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_IN);
    for (int i = 0; i < toolbar.getChildCount(); i++) {
        final View v = toolbar.getChildAt(i);
        // We can't iterate through the toolbar.getMenu() here, because we need the ActionMenuItemView. ATEActionMenuItemView is overriding the item icon tint color.
        if (v instanceof ActionMenuView) {
            for (int j = 0; j < ((ActionMenuView) v).getChildCount(); j++) {
                final View innerView = ((ActionMenuView) v).getChildAt(j);
                if (innerView instanceof ActionMenuItemView) {
                    int drawablesCount = ((ActionMenuItemView) innerView).getCompoundDrawables().length;
                    for (int k = 0; k < drawablesCount; k++) {
                        if (((ActionMenuItemView) innerView).getCompoundDrawables()[k] != null) {
                            ((ActionMenuItemView) innerView).getCompoundDrawables()[k].setColorFilter(colorFilter);
                        }
                    }
                }
            }
        }
    }

    if (menu == null)
        menu = toolbar.getMenu();
    if (menu != null && menu.size() > 0) {
        for (int i = 0; i < menu.size(); i++) {
            final MenuItem item = menu.getItem(i);
            // We must iterate through the toolbar.getMenu() too, to keep the tint when resuming the paused activity.
            if (item.getIcon() != null) {
                item.setIcon(TintHelper.createTintedDrawable(item.getIcon(), color));
            }
            // Search view theming
            if (item.getActionView() != null && (item.getActionView() instanceof android.widget.SearchView || item.getActionView() instanceof android.support.v7.widget.SearchView)) {
                SearchViewTintUtil.setSearchViewContentColor(item.getActionView(), color);
            }
        }
    }
}