Android 实现应用桌面角标

1、小米手机

官方文档：文档中心

 /**
     * 小米手机创建通知信息并创建角标
     *
     * @param context
     * @param num
     */
    public static void setXiaoMiBadgeNum(Context context, int num) {
        (TAG, "--------setXiaoMiBadgeNum----------");
        NotificationManager notificationManager = (NotificationManager) (Context.NOTIFICATION_SERVICE);
        String title = "消息提示";
        String desc = "您有" + num + "条未读消息";
        if (.SDK_INT >= Build.VERSION_CODES.O) {
            String channelId = "default";
            String channelName = "默认通知";
            NotificationChannel channel = new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_HIGH);
            (true);
            (channel);
        }

        Notification notification = new (context, "default")
                .setContentTitle(title)
                .setContentText(desc)
                .setWhen(())
                .setSmallIcon(.ic_launcher)
                .setAutoCancel(true)
                .setChannelId("default")
                .setNumber(num)//桌面角标数量
                .setBadgeIconType(NotificationCompat.BADGE_ICON_SMALL)
                .build();
        //取消掉上一条通知消息
        (notificationId);
        try {
            Field field = ().getDeclaredField("extraNotification");
            Object extraNotification = (notification);
            Method method = ().getDeclaredMethod("setMessageCount", );
            (extraNotification, num);
        } catch (Exception e) {
            ();
        }
        (notificationId, notification);
    }

需要注意以下几点：

1）发送通知必须当app处于后台才会生成桌面角标，否则只会生成一次。

2）该方法目前支持到miui12.

2、三星手机

已在三星s7dege+上，Android8.0上通过

  public static void setSamSungBadgeNum(Context context,int num){

         mBuilder = new (context)
                .setSmallIcon(.ic_launcher)
                .setWhen(())
                .setAutoCancel(true);

        ("test");
        ("test");
        ("test");

        //点击set 后，app退到桌面等待3s看效果（有的launcher当app在前台设置未读数量无效）
        final Notification notification = ();
        sendBadgeNotification(notification, notificationId, context, num, num);
    }
    /**
     * 重置、清除Badge未读显示数<br/>
     *
     * @param context
     */
    public static void resetBadgeCount(Context context) {
        sendBadgeNotification(null, 0, context, 0, 0);
    }

    public static void sendBadgeNotification(Notification notification, int notifyID, Context context, int thisNotifyCount, int count) {
        if (count <= 0) {
            count = 0;
        } else {
            count = (0, (count, 99));
        }

        executeBadge(context, notification, notifyID, thisNotifyCount, count);
    }

    public static void executeBadge(Context context, Notification notification, int notificationId, int thisNotificationCount, int count) {
        setNotification(notification, notificationId, context);
        String launcherClassName = getLauncherClassName(context);
        if (launcherClassName == null) {
            return;
        }
        Intent intent = new Intent(".BADGE_COUNT_UPDATE");
        ("badge_count", count);
        ("badge_count_package_name", ());
        ("badge_count_class_name", launcherClassName);
        (intent);
    }

    protected static void setNotification(Notification notification, int notificationId, Context context) {
        if (notification != null) {
            NotificationManager notificationManager = (NotificationManager) (Context.NOTIFICATION_SERVICE);
            (notificationId, notification);
        }
    }

    protected static String getLauncherClassName(Context context) {
        PackageManager packageManager = ();

        Intent intent = new Intent(Intent.ACTION_MAIN);
        // To limit the components this Intent will resolve to, by setting an
        // explicit package name.
        (());
        (Intent.CATEGORY_LAUNCHER);

        // All Application must have 1 Activity at least.
        // Launcher activity must be found!
        ResolveInfo info = packageManager
                .resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);

        // get a ResolveInfo containing ACTION_MAIN, CATEGORY_LAUNCHER
        // if there is no Activity which has filtered by CATEGORY_DEFAULT
        if (info == null) {
            info = (intent, 0);
        }

        return ;
    }

3、华为

 <!--华为手机更新应用桌面角标需要的权限-->
    <uses-permission android:name=".CHANGE_BADGE"/>

 private void setHUAWEIIconBadgeNum(Context context,int count)  {

         mBuilder = new (context)
                .setSmallIcon(.ic_launcher)
                .setWhen(())
                .setAutoCancel(true);

        ("test");
        ("test");
        ("test");

        //点击set 后，app退到桌面等待3s看效果（有的launcher当app在前台设置未读数量无效）
        final Notification notification = ();
        
        
        setNotification(notification, notificationId, context);
        Bundle bunlde = new Bundle();
        ("package", ());
        ("class", getLauncherClassName(context));
        ("badgenumber", count);
        ().call(("content:///badge/"), "change_badge", null, bunlde);
    }

4、OPPO

首先，官方客服和我说他们可以支持，但需要申请。

而抱歉的是截止目前我还没有得到具体的方法，因为我们还在它的申请流程中。。

具体申请流程请去OPPO开放平台找他们的人工客服获取申请方法。

    public static void setBadgeNumber(Context context, int number) {
        try {
            if (number == 0) {
                number = -1;
            }
            Intent intent = new Intent("");
            ("pakeageName", ());
            ("number", number);
            ("upgradeNumber", number);
            if (canResolveBroadcast(context, intent)) {
                (intent);
            } else {
                try {
                    Bundle extras = new Bundle();
                    ("app_badge_count", number);
                    ().call(("content:///badge"), "setAppBadgeCount", null, extras);
                } catch (Throwable t) {
                    ();
                }
            }
 
        } catch (Exception e) {
            ();
        }
    }
 
    public static boolean canResolveBroadcast(Context context, Intent intent) {
        PackageManager packageManager = ();
        List<ResolveInfo> receivers = (intent, 0);
        return receivers != null && () > 0;
    }

5、VIVO

官方文档：vivo开放平台

public static void setBadgeNumber(Context context, int number) {
        try {
            Intent intent = new Intent(".CHANGE_APPLICATION_NOTIFICATION_NUM");
            ("packageName", ());
            String launchClassName = ().getLaunchIntentForPackage(()).getComponent().getClassName();
            ("className", launchClassName);
            ("notificationNum", number);
            (intent);
        } catch (Exception e) {
            ();
        }
    }

参考文章：
ShortcutBadger
BadgeUtil
android 为桌面图标添加数字角标
最新安卓提醒及角标功能实现概总