以编程方式更改 Android 溢出菜单图标 [英] Changing the Android Overflow menu icon programmatically

问题描述

我一直在寻找一种方法来以编程方式更改 android 中溢出菜单图标的颜色.

I've been looking for a method to programmatically change the color of the overflow menu icon in android.

我发现的唯一选择是通过添加自定义样式来永久更改图标.问题是在不久的将来，我们将需要在使用我们的应用程序期间更改此设置.

The only option I have found is to change the icon permanently by adding a custom style. The problem is that in the nearby future we will need to change this during the use of our app.

我们的应用是一系列在线平台的扩展，因此用户可以输入他们平台的网址.这些有自己的样式，将通过对应用程序的 API 调用获取.

Our app is an extension to a series of online-platforms and therefore a user can enter their platform's web-url. These have their own styles and will be fetched by an API call towards the app.

这些可能会让我改变图标的​​颜色...

These might adress me to change the color of the icon...

目前我更改了操作栏中的其他图标，如下所示:

Currently I change other icons in the Actionbar like this:

if (ib != null){
            Drawable resIcon = getResources().getDrawable(R.drawable.navigation_refresh);
            resIcon.mutate().setColorFilter(StyleClass.getColor("color_navigation_icon_overlay"), PorterDuff.Mode.SRC_ATOP);
            ib.setIcon(resIcon);
}

现在我必须使用样式.

推荐答案

实际上，您可以使用一个小技巧以编程方式更改溢出图标.举个例子:

You actually can programmatically change the overflow icon using a little trick. Here's an example:

为溢​​出菜单创建样式并传入内容描述

<style name="Widget.ActionButton.Overflow" parent="@android:style/Widget.Holo.ActionButton.Overflow">
    <item name="android:contentDescription">@string/accessibility_overflow</item>
</style>

<style name="Your.Theme" parent="@android:style/Theme.Holo.Light.DarkActionBar">
    <item name="android:actionOverflowButtonStyle">@style/Widget.ActionButton.Overflow</item>
</style>

现在调用 ViewGroup.findViewsWithText 并传入您的内容描述.所以，就像:

Now call ViewGroup.findViewsWithText and pass in your content description. So, something like:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // The content description used to locate the overflow button
    final String overflowDesc = getString(R.string.accessibility_overflow);
    // The top-level window
    final ViewGroup decor = (ViewGroup) getWindow().getDecorView();
    // Wait a moment to ensure the overflow button can be located
    decor.postDelayed(new Runnable() {

        @Override
        public void run() {
            // The List that contains the matching views
            final ArrayList<View> outViews = new ArrayList<>();
            // Traverse the view-hierarchy and locate the overflow button
            decor.findViewsWithText(outViews, overflowDesc,
                    View.FIND_VIEWS_WITH_CONTENT_DESCRIPTION);
            // Guard against any errors
            if (outViews.isEmpty()) {
                return;
            }
            // Do something with the view
            final ImageButton overflow = (ImageButton) outViews.get(0);
            overflow.setImageResource(R.drawable.ic_action_overflow_round_red);

        }

    }, 1000);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Add a dummy item to the overflow menu
    menu.add("Overflow");
    return super.onCreateOptionsMenu(menu);
}

View.findViewsWithText 是在 API 级别 14 中添加的，因此您必须使用自己的兼容性方法:

View.findViewsWithText was added in API level 14, so you'll have to use your own compatibility method:

static void findViewsWithText(List<View> outViews, ViewGroup parent, String targetDescription) {
    if (parent == null || TextUtils.isEmpty(targetDescription)) {
        return;
    }
    final int count = parent.getChildCount();
    for (int i = 0; i < count; i++) {
        final View child = parent.getChildAt(i);
        final CharSequence desc = child.getContentDescription();
        if (!TextUtils.isEmpty(desc) && targetDescription.equals(desc.toString())) {
            outViews.add(child);
        } else if (child instanceof ViewGroup && child.getVisibility() == View.VISIBLE) {
            findViewsWithText(outViews, (ViewGroup) child, targetDescription);
        }
    }
}

结果

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