有关Android应用桌面角标(BadgeNumber)实现的探讨

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

public static void setBadgeNumber(Context context, int number) {
    try {
        if (number < 0) number = 0;
        Bundle bundle = new Bundle();
        bundle.putString("package", context.getPackageName());
        String launchClassName = context.getPackageManager().getLaunchIntentForPackage(context.getPackageName()).getComponent().getClassName();
        bundle.putString("class", launchClassName);
        bundle.putInt("badgenumber", number);
        context.getContentResolver().call(Uri.parse("content://com.huawei.android.launcher.settings/badge/"), "change_badge", null, bundle);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public static void setBadgeNumber(Context context, int number) {
    try {
        if (number == 0) {
            number = -1;
        }
        Intent intent = new Intent("com.oppo.unsettledevent");
        intent.putExtra("pakeageName", context.getPackageName());
        intent.putExtra("number", number);
        intent.putExtra("upgradeNumber", number);
        if (canResolveBroadcast(context, intent)) {
            context.sendBroadcast(intent);
        } else {
            try {
                Bundle extras = new Bundle();
                extras.putInt("app_badge_count", number);
                context.getContentResolver().call(Uri.parse("content://com.android.badge/badge"), "setAppBadgeCount", null, extras);
            } catch (Throwable t) {
                t.printStackTrace();
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}
public static boolean canResolveBroadcast(Context context, Intent intent) {
    PackageManager packageManager = context.getPackageManager();
    List<ResolveInfo> receivers = packageManager.queryBroadcastReceivers(intent, 0);
    return receivers != null && receivers.size() > 0;
}

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

//在调用NotificationManager.notify(notifyID, notification)这个方法之前先设置角标显示的数目
public static void setBadgeNumber(Notification notification, int number) {
    try {
        Field field = notification.getClass().getDeclaredField("extraNotification");
        Object extraNotification = field.get(notification);
        Method method = extraNotification.getClass().getDeclaredMethod("setMessageCount", int.class);
        method.invoke(extraNotification, number);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public class BadgeNumberManager {
    private Context mContext;
    private BadgeNumberManager(Context context) {
        mContext = context;
    }
    public static BadgeNumberManager from(Context context) {
        return new BadgeNumberManager(context);
    }
    private static final BadgeNumberManager.Impl IMPL;
    /**
     * 设置应用在桌面上显示的角标数字
     * @param number 显示的数字
     */
    public void setBadgeNumber(int number) {
        IMPL.setBadgeNumber(mContext, number);
    }
    interface Impl {
        void setBadgeNumber(Context context, int number);
    }
    static class ImplHuaWei implements Impl {
        @Override
        public void setBadgeNumber(Context context, int number) {
            BadgeNumberManagerHuaWei.setBadgeNumber(context, number);
        }
    }
    static class ImplVIVO implements Impl {
        @Override
        public void setBadgeNumber(Context context, int number) {
            BadgeNumberManagerVIVO.setBadgeNumber(context, number);
        }
    }
    static class ImplBase implements Impl {
        @Override
        public void setBadgeNumber(Context context, int number) {
            //do nothing
        }
    }
    static {
        String manufacturer = Build.MANUFACTURER;
        if (manufacturer.equalsIgnoreCase("Huawei")) {
            IMPL = new ImplHuaWei();
        } else if (manufacturer.equalsIgnoreCase("vivo")) {
            IMPL = new ImplVIVO();
        } else if (manufacturer.equalsIgnoreCase("XXX")) {
            //其他品牌机型的实现类
            IMPL = new ImplXXX();
            ......
        } else {
            IMPL = new ImplBase();
        }
    }
}