桌面图标未读消息(小米，sony，三星手机)

新消息来了，在桌面的Laucher图标上显示新消息数

/**
 * 应用桌面图标未读消息显示工具类
 * 只支持 小米，三星和索尼
 */
public class BadgeUtil {

    final static String LAUNCHER_ACTIVITY_NAME = "com.wenki.example.activity.SplashActivity";

    public static void setBadgeCount(Context context, int count) {
        if (count <= 0) {
            count = 0;
        } else {
            count = Math.max(0, Math.min(count, 99));
        }

        if (Build.MANUFACTURER.equalsIgnoreCase("sony")) {
            sendToSony(context, count);
        } else if (Build.MANUFACTURER.toLowerCase().contains("samsung")) {
            sendToSamsumg(context, count);
        } else if (isMIUI()) {
            sendToXiaoMi(context, count);
        } else {
            LogUtils.d("BadgeUtil : Badge not support");
        }

    }

    public static void clearBadgeCount(Context context) {
        setBadgeCount(context, 0);
    }

    private static void sendToXiaoMi(Context context, int count) {
        NotificationManager mNotificationManager = (NotificationManager) context
                .getSystemService(Context.NOTIFICATION_SERVICE);
        Notification.Builder builder = new Notification.Builder(context)
                .setContentTitle("Title").setContentText("Content Text").setSmallIcon(R.drawable.app_icon);
        try {
            Notification notification = builder.getNotification();
            Field field = notification.getClass().getDeclaredField("extraNotification");
            Object extraNotification = field.get(notification);
            Method method = extraNotification.getClass().getDeclaredMethod("setMessageCount", int.class);
            method.invoke(extraNotification, count);
            mNotificationManager.notify(1001, notification);
        } catch (Exception e) {
            Intent localIntent = new Intent("android.intent.action.APPLICATION_MESSAGE_UPDATE");
            localIntent.putExtra("android.intent.extra.update_application_component_name",
                    context.getPackageName() + "/" + LAUNCHER_ACTIVITY_NAME);
            localIntent.putExtra("android.intent.extra.update_application_message_text",
                    String.valueOf(count == 0 ? "" : count));
            context.sendBroadcast(localIntent);
        }
    }

    private static void sendToSony(Context context, int count) {
        boolean isShow = true;
        if (count == 0) {
            isShow = false;
        }
        Intent localIntent = new Intent();
        localIntent.setAction("com.sonyericsson.home.action.UPDATE_BADGE");
        localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.SHOW_MESSAGE", isShow);//是否显示
        localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.ACTIVITY_NAME", LAUNCHER_ACTIVITY_NAME);//启动页
        localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.MESSAGE", String.valueOf(count));//数字
        localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.PACKAGE_NAME", context.getPackageName());//包名
        context.sendBroadcast(localIntent);
    }

    private static void sendToSamsumg(Context context, int count) {
        Intent intent = new Intent("android.intent.action.BADGE_COUNT_UPDATE");
        intent.putExtra("badge_count", count);
        intent.putExtra("badge_count_package_name", context.getPackageName());
        intent.putExtra("badge_count_class_name", LAUNCHER_ACTIVITY_NAME);
        context.sendBroadcast(intent);
    }

    private static String getLauncherClassName(Context context) {
        PackageManager pm = context.getPackageManager();
        Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        List<ResolveInfo> resolveInfos = pm.queryIntentActivities(intent, 0);
        for (ResolveInfo resolveInfo : resolveInfos) {
            String pkgName = resolveInfo.activityInfo.applicationInfo.packageName;
            if (pkgName.equalsIgnoreCase(context.getPackageName())) {
                String className = resolveInfo.activityInfo.name;
                return className;
            }
        }
        return null;
    }

    private static boolean isMIUI() {
        String code = getSystemProperty("ro.miui.ui.version.code");
        String name = getSystemProperty("ro.miui.ui.version.name");
        return !TextUtils.isEmpty(code) && !TextUtils.isEmpty(name);
    }

    public static String getSystemProperty(String propName) {
        String line;
        BufferedReader input = null;
        try {
            Process p = Runtime.getRuntime().exec("getprop " + propName);
            input = new BufferedReader(new InputStreamReader(p.getInputStream()), 1024);
            line = input.readLine();
            input.close();
        } catch (IOException ex) {
            return null;
        } finally {
            if (input != null) {
                try {
                    input.close();
                } catch (IOException e) {
//                    e.printStackTrace();
                }
            }
        }
        return line;
    }

}

其中 LAUNCHER_ACTIVITY_NAME 是启动页，也可以用 getLauncherClassName()方法获取。

小米的MIUI6.0以上版本，必须使用通知栏的方式实现，而6.0之前是发广播的形式。isMIUI()方法判断了所有的MIUI系统，包括刷机的。

Sony没有测试机，未测试。小米三星测试有效