怎么在Android应用中添加一个未读消息提示功能

public class LauncherBadgeHelper {

 /**
  * Set badge count

  * 针对 Samsung / xiaomi / sony 手机有效
  *
  * @param context The context of the application package.
  * @param count Badge count to be set
  */
 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("Xiaomi")) {
   sendToXiaoMi(context, count);
  } else if (Build.MANUFACTURER.equalsIgnoreCase("sony")) {
   sendToSony(context, count);
  } else if (Build.MANUFACTURER.toLowerCase().contains("samsung")) {
   sendToSamsumg(context, count);
  } else {
   sendToSamsumg(context, count);
  }
 }

 /**
  * 向小米手机发送未读消息数广播
  *
  * @param count
  */
 private static void sendToXiaoMi(Context context, int count) {
  try {
   Class miuiNotificationClass = Class.forName("android.app.MiuiNotification");
   Object miuiNotification = miuiNotificationClass.newInstance();
   Field field = miuiNotification.getClass().getDeclaredField("messageCount");
   field.setAccessible(true);
   field.set(miuiNotification, String.valueOf(count == 0 ? "" : count)); // 设置信息数-->这种发送必须是miui 6才行
  } catch (Exception e) {
   LogController.e(e.toString());
   // miui 6之前的版本
   Intent localIntent = new Intent(
     "android.intent.action.APPLICATION_MESSAGE_UPDATE");
   localIntent.putExtra(
     "android.intent.extra.update_application_component_name",
     context.getPackageName() + "/" + getLauncherClassName(context));
   localIntent.putExtra(
     "android.intent.extra.update_application_message_text", String.valueOf(count == 0 ? "" : count));
   context.sendBroadcast(localIntent);
  }
 }

 /**
  * 向索尼手机发送未读消息数广播

  * 据说：需添加权限： [未验证]
  *
  * @param count
  */
 private static void sendToSony(Context context, int count) {
  String launcherClassName = getLauncherClassName(context);
  if (launcherClassName == null) {
   return;
  }

  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", launcherClassName);//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);
 }

 /**
  * 向三星手机发送未读消息数广播
  *
  * @param count
  */
 private static void sendToSamsumg(Context context, int count) {
  String launcherClassName = getLauncherClassName(context);
  if (launcherClassName == null) {
   return;
  }
  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", launcherClassName);
  context.sendBroadcast(intent);
 }

 /**
  * 重置、清除Badge未读显示数

  *
  * @param context
  */
 public static void resetBadgeCount(Context context) {
  setBadgeCount(context, 0);
 }

 /**
  * Retrieve launcher activity name of the application from the context
  *
  * @param context The context of the application package.
  * @return launcher activity name of this application. From the
  * "android:name" attribute.
  */
 private static String getLauncherClassName(Context context) {
  PackageManager packageManager = context.getPackageManager();

  Intent intent = new Intent(Intent.ACTION_MAIN);
  // To limit the components this Intent will resolve to, by setting an
  // explicit package name.
  intent.setPackage(context.getPackageName());
  intent.addCategory(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 = packageManager.resolveActivity(intent, 0);
  }

  return info.activityInfo.name;
 }
}

NotificationManager mNotificationManager = (NotificationManager) this

.getSystemService(Context.NOTIFICATION_SERVICE);

Notification.Builder builder = new Notification.Builder(this)

.setContentTitle(“title”).setContentText(“text”).setSmallIcon(R.drawable.icon);

Notification notification = builder.build();

try {

Field field = notification.getClass().getDeclaredField(“extraNotification”);

Object extraNotification = field.get(notification);

Method method = extraNotification.getClass().getDeclaredMethod(“setMessageCount”, int.class);

method.invoke(extraNotification, mCount);

} catch (Exception e) {

e.printStackTrace();

}
mNotificationManager.notify(0,notification);

/**
 * 向小米手机发送未读消息数广播miui6以后
 *
 * @param count
 */
 private static void sendToXiaoMi2(Context context, int count) {
  NotificationManager mNotificationManager = (NotificationManager) MyApplication.getContext().getSystemService(Context.NOTIFICATION_SERVICE);
  Notification.Builder builder = new Notification.Builder(MyApplication.getContext()).setContentTitle("title").setContentText("text").setSmallIcon(R.drawable.ico_haoyilogo);
  Notification notification = null;
  if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
   notification = builder.build();
  }
  try {
   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(10, notification);
  } catch (Exception e) {
   e.printStackTrace();
   LogController.e(e.toString());
   // miui 6之前的版本
   Intent localIntent = new Intent(
     "android.intent.action.APPLICATION_MESSAGE_UPDATE");
   localIntent.putExtra(
     "android.intent.extra.update_application_component_name",
     context.getPackageName() + "/" + getLauncherClassName(context));
   localIntent.putExtra(
     "android.intent.extra.update_application_message_text", String.valueOf(count == 0 ? "" : count));
   context.sendBroadcast(localIntent);
  }
 }