上溢菜单和子菜单中的着色菜单图标

很遗憾,无法使用主题或样式设置菜单项图标颜色的色调。你需要一种方法来检查 MenuItem 在 ActionBar 或者在溢出菜单中。本地人和支持者 MenuItemImpl 类对此有一个方法,但它们要么被限制在库中,要么被隐藏。这需要反思。可以使用以下方法检查菜单项是否可见,然后设置颜色过滤器:

public static boolean isActionButton(@NonNull MenuItem item) {
  if (item instanceof MenuItemImpl) {
    return ((MenuItemImpl) item).isActionButton();
  } else {
    // Not using the support library. This is a native MenuItem. Reflection is needed.
    try {
      Method m = item.getClass().getDeclaredMethod("isActionButton");
      if (!m.isAccessible()) m.setAccessible(true);
      return (boolean) m.invoke(item);
    } catch (Exception e) {
      return false;
    }
  }
}

您还需要等到菜单充气后再给项目上色。要做到这一点,你可以得到一个参考 动作栏 染红 菜单项 后 动作栏 已经画好了。

例子:

@Override public boolean onCreateOptionsMenu(Menu menu) {
  getMenuInflater().inflate(R.menu.menu_main, menu);

  int id = getResources().getIdentifier("action_bar", "id", "android");
  ViewGroup actionBar;
  if (id != 0) {
    actionBar = (ViewGroup) findViewById(id);
  } else {
    // You must be using a custom Toolbar. Use the toolbar view instead.
    // actionBar = yourToolbar
  }

  actionBar.post(new Runnable() {
    @Override public void run() {
      // Add code to tint menu items here 
    }
  });

  return super.onCreateOptionsMenu(menu);
}

下面是我为帮助给菜单项图标着色而编写的类: https://gist.github.com/jaredrummler/7816b13fcd5fe1ac61cb0173a1878d4f

感谢@jaredrummler,我找到了一种方法来确定图标是否在溢出菜单中。我在这里发布了完整的代码,收集了他的答案。我还添加了一个助手方法来获得正确的图标颜色。以下是我目前使用的:

主题词

public final class ThemeUtils {

    /**
     * Obtain colors of a context's theme from attributes
     * @param context    themed context
     * @param colorAttrs varargs of color attributes
     * @return array of colors in the same order as the array of attributes
     */
    public static int[] getColors(Context context, int... colorAttrs) {
        TypedArray ta = context.getTheme().obtainStyledAttributes(colorAttrs);

        int[] colors = new int[colorAttrs.length];
        for (int i = 0; i < colorAttrs.length; i++) {
            colors[i] = ta.getColor(i, 0);
        }

        ta.recycle();

        return colors;
    }

    /**
     * Get the two colors needed for tinting toolbar icons
     * The colors are obtained from the toolbar's theme and popup theme
     * These themes are obtained from {@link R.attr#toolbarTheme} and {@link R.attr#toolbarPopupTheme}
     * The two color attributes used are:
     * - {@link android.R.attr#textColorPrimary} for the normal color
     * - {@link android.R.attr#textColorSecondary} for the color in a menu
     * @param context activity context
     * @return int[2]{normal color, color in menu}
     */
    public static int[] getToolbarColors(Context context) {
        // Get the theme and popup theme of a toolbar
        TypedArray ta = context.getTheme().obtainStyledAttributes(
                new int[]{R.attr.toolbarTheme, R.attr.toolbarPopupTheme});
        Context overlayTheme = new ContextThemeWrapper(context, ta.getResourceId(0, 0));
        Context popupTheme = new ContextThemeWrapper(context, ta.getResourceId(1, 0));
        ta.recycle();

        // Get toolbar colors from these themes
        int colorNormal = ThemeUtils.getColors(overlayTheme, android.R.attr.textColorPrimary)[0];
        int colorInMenu = ThemeUtils.getColors(popupTheme, android.R.attr.textColorSecondary)[0];

        return new int[]{colorNormal, colorInMenu};
    }

    /**
     * Change the color of the icons of a menu
     * Disabled items are set to 50% alpha
     * @param menu        targeted menu
     * @param colorNormal normal icon color
     * @param colorInMenu icon color for popup menu
     * @param isInSubMenu whether menu is a sub menu
     */
    private static void changeIconsColor(View toolbar, Menu menu, int colorNormal, int colorInMenu, boolean isInSubMenu) {
        toolbar.post(() -> {
            // Change icons color
            for (int i = 0; i < menu.size(); i++) {
                MenuItem item = menu.getItem(i);
                changeMenuIconColor(item, colorNormal, colorInMenu, isInSubMenu);

                if (item.hasSubMenu()) {
                    changeIconsColor(toolbar, item.getSubMenu(), colorNormal, colorInMenu, true);
                }
            }
        });
    }

    public static void changeIconsColor(View toolbar, Menu menu, int colorNormal, int colorInMenu) {
        changeIconsColor(toolbar, menu, colorNormal, colorInMenu, false);
    }

    /**
     * Change the color of a single menu item icon
     * @param item        targeted menu item
     * @param colorNormal normal icon color
     * @param colorInMenu icon color for popup menu
     * @param isInSubMenu whether item is in a sub menu
     */
    @SuppressLint("RestrictedApi")
    public static void changeMenuIconColor(MenuItem item, int colorNormal, int colorInMenu, boolean isInSubMenu) {
        if (item.getIcon() != null) {
            Drawable icon = item.getIcon().mutate();
            int color = (((MenuItemImpl) item).isActionButton() && !isInSubMenu ? colorNormal : colorInMenu);
            icon.setColorFilter(color, PorterDuff.Mode.SRC_IN);
            icon.setAlpha(item.isEnabled() ? 255 : 128);
            item.setIcon(icon);
        }
    }

}

活性物质

public final class ActivityUtils {

    /**
     * Force show the icons in the overflow menu and submenus
     * @param menu target menu
     */
    public static void forceShowMenuIcons(Menu menu) {
        if (menu instanceof MenuBuilder) {
            MenuBuilder m = (MenuBuilder) menu;
            m.setOptionalIconsVisible(true);
        }
    }

    /**
     * Get the action bar or toolbar view in activity
     * @param activity activity to get from
     * @return the toolbar view
     */
    public static ViewGroup findActionBar(Activity activity) {
        int id = activity.getResources().getIdentifier("action_bar", "id", "android");
        ViewGroup actionBar = null;
        if (id != 0) {
            actionBar = activity.findViewById(id);
        }
        if (actionBar == null) {
            return findToolbar((ViewGroup) activity.findViewById(android.R.id.content).getRootView());
        }
        return actionBar;
    }

    private static ViewGroup findToolbar(ViewGroup viewGroup) {
        ViewGroup toolbar = null;
        for (int i = 0; i < viewGroup.getChildCount(); i++) {
            View view = viewGroup.getChildAt(i);
            if (view.getClass() == android.support.v7.widget.Toolbar.class ||
                    view.getClass() == android.widget.Toolbar.class) {
                toolbar = (ViewGroup) view;
            } else if (view instanceof ViewGroup) {
                toolbar = findToolbar((ViewGroup) view);
            }
            if (toolbar != null) {
                break;
            }
        }
        return toolbar;
    }

}

我还定义了两个属性 attrs.xml : toolbarTheme 和 toolbarPopupTheme 我在工具栏上设置的XML布局。它们的值在中的“我的应用”主题中定义 themes.xml . 这些属性由 ThemeUtils.getToolbarColors(Context) 获取用于给图标着色的颜色,因为工具栏通常使用主题覆盖。通过这样做,我可以通过改变这2个属性的值来改变每个工具栏的主题。

剩下的就是在活动的 onCreateOptionsMenu(Menu menu) :

ActivityUtils.forceShowMenuIcons(menu);  // Optional, show icons in overflow and submenus

View toolbar = ActivityUtils.findActionBar(this);  // Get the action bar view
int[] toolbarColors = ThemeUtils.getToolbarColors(this);  // Get the icons colors
ThemeUtils.changeIconsColor(toolbar, menu, toolbarColors[0], toolbarColors[1]);

在一个片段中可以通过替换来完成同样的操作。 this 具有 getActivity() .

更新MeNuItI图图标时,可以调用另一种方法, ThemeUtils.changeMenuIconColor() . 在这种情况下,工具栏颜色可以在 onCreate 并全局存储以重用它们。