Question

我知道这个问题已经被问过几次了。但是，没有一种解决方案对我有用。这就是为什么我想再次问这个问题。以下行仅接受NotificationCompat.Builder(context)：

 NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context, ADMIN_CHANNEL_ID)  // Getting error

我已经实现了：

导入android.support.v4.app.NotificationCompat
我的支持库版本高于25

implementation group: 'com.android.support', name: 'appcompat-v7', version: '27.1.1'
编译和目标sdk高于25

android { compileSdkVersion(27) buildToolsVersion '27.0.3' flavorDimensions 'default' dataBinding { enabled = true } defaultConfig { applicationId('something') minSdkVersion(16) targetSdkVersion(27) versionCode(1) versionName('1.0.0') testInstrumentationRunner('android.support.test.runner.AndroidJUnitRunner') multiDexEnabled true } 但是仍然出现错误。我应该怎么做才能解决这个问题？请帮忙。

Answer 1

解决方案：

在Android 8.0（Oreo）上，您必须具有称为NotificationChannel的名称，因此请尝试以下实现：

第一步：创建通知频道

private void createNotificationChannel() {

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        CharSequence name = getString(R.string.channel_name);
        String description = getString(R.string.channel_description);
        int importance = NotificationManager.IMPORTANCE_DEFAULT;
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
        channel.setDescription(description);
        NotificationManager notificationManager = getSystemService(NotificationManager.class);
        notificationManager.createNotificationChannel(channel);
    }
}

最后：然后是您的通知：

 NotificationCompat.Builder mBuilder =   new NotificationCompat.Builder(activity)
                .setSmallIcon(R.drawable.ic_launcher_background) // notification icon
                .setContentTitle("Notification!") // title for notification
                .setContentText("Hello word") // message for notification
                .setAutoCancel(true); // clear notification after click
Intent intent = new Intent(activity, RecorderActivity.class);
PendingIntent pi = PendingIntent.getActivity(activity,0,intent, PendingIntent.FLAG_UPDATE_CURRENT);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mBuilder.setContentIntent(pi);
notificationManager.notify(1, mBuilder.build());

请与您的产品进行比较，看看是否有效

尝试一下，希望对您有所帮助。

Answer 2

据我所知，您只能为大于或等于26的版本添加通知通道，低于android 8.0的版本不支持通知通道。我的建议是使用以下代码：

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) 
           { 
             NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context, ADMIN_CHANNEL_ID) 
           }

    else NotificationCompat.Builder(context)

Answer 3

首先创建通知通道和通知传递通道ID。

  NotificationManager notificationManager = (NotificationManager)context
                     .getSystemService(Context.NOTIFICATION_SERVICE);
  buildNotificationChannel(manager,String <Channel_ID>,String description);

创建通知频道。

 public void buildNotificationChannel(NotificationManager manager, String channelID, 
       String description) {
          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             if (manager.getNotificationChannel(channelID) == null) {
               NotificationChannel channel = new NotificationChannel(channelID, 
               description,NotificationManager.IMPORTANCE_LOW);
               channel.setDescription(description);
               manager.createNotificationChannel(channel);
           }
      }
  }

创建通知传递参数通道ID

     Notification notification = new 
     NotificationCompat.Builder(context,<Channel_ID>)
        .setSmallIcon(R.drawable.app_icon)
        .setContentTitle("Title goes here.")
        .setPriority(Notification.PRIORITY_HIGH)
        .setContentIntent(pendingIntent)
        .setAutoCancel(false)
        .setOngoing(true)
        .setVisibility(Notification.VISIBILITY_PUBLIC)
        .setContentText("Content Text").build();
        notificationManager.notify(ID,notification);

Answer 4

尝试更新gradle依赖项。我也没有得到setChannelId方法或参数。但是随着支持库的更新版本而来。你会找到它的。尝试使用

implementation 'com.android.support:support-v4:28.0.0'

NotificationCompat.Builder（）不接受通道ID作为参数

4 个答案: