Android 服务完成时在状态栏上发送通知

我有一个应用程序正在使用服务下载图像，但我希望在下载完成时通知用户，即使用户在应用程序之外（状态栏中的通知），也可以在minSdkVersion=“8”中使用，我知道有一些关于此的答案，但我没有收到通知：以下是我的一些代码（只有通知是问题所在时，它才起作用）：

如何修改sendNotification（）？？ 谢谢

试试这个：

private void sendNotification(){

    CharSequence title = "The title";
    CharSequence message = "My message";

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
                      .setSmallIcon(R.drawable.ic_launcher)
                      .setAutoCancel(true)
                      .setContentTitle(title);

    mBuilder.setContentText(message);
    mBuilder.setTicker(message);
    mBuilder.setWhen(System.currentTimeMillis());

    NotificationManager notificationManager =   
           (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, new Intent(), 0);
    mBuilder.setContentIntent(pendingIntent);
    notificationManager.notify(0, mBuilder.build());
}

试试这个：

private void sendNotification(){

    CharSequence title = "The title";
    CharSequence message = "My message";

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
                      .setSmallIcon(R.drawable.ic_launcher)
                      .setAutoCancel(true)
                      .setContentTitle(title);

    mBuilder.setContentText(message);
    mBuilder.setTicker(message);
    mBuilder.setWhen(System.currentTimeMillis());

    NotificationManager notificationManager =   
           (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, new Intent(), 0);
    mBuilder.setContentIntent(pendingIntent);
    notificationManager.notify(0, mBuilder.build());
}

试试这个：

private void sendNotification(){

    CharSequence title = "The title";
    CharSequence message = "My message";

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
                      .setSmallIcon(R.drawable.ic_launcher)
                      .setAutoCancel(true)
                      .setContentTitle(title);

    mBuilder.setContentText(message);
    mBuilder.setTicker(message);
    mBuilder.setWhen(System.currentTimeMillis());

    NotificationManager notificationManager =   
           (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, new Intent(), 0);
    mBuilder.setContentIntent(pendingIntent);
    notificationManager.notify(0, mBuilder.build());
}

试试这个：

private void sendNotification(){

    CharSequence title = "The title";
    CharSequence message = "My message";

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
                      .setSmallIcon(R.drawable.ic_launcher)
                      .setAutoCancel(true)
                      .setContentTitle(title);

    mBuilder.setContentText(message);
    mBuilder.setTicker(message);
    mBuilder.setWhen(System.currentTimeMillis());

    NotificationManager notificationManager =   
           (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, new Intent(), 0);
    mBuilder.setContentIntent(pendingIntent);
    notificationManager.notify(0, mBuilder.build());
}