结合Android O通知问题:
1)我创建了一个Notification Channel(见下文),用.setChannelId()调用构建器(传入我创建的频道的名称,“wakey”;然而,当我运行应用程序时,我得到一条消息,我没有向渠道“null”发布通知。可能是什么导致了这个?
2)我怀疑#1的答案可以在它要检查的“日志”中找到,但我已经检查了logcat&看不到有关通知或频道的任何信息。它说要查看的日志在哪里?
以下是我用来创建频道的代码:
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
CharSequence name = context.getString(R.string.app_name);
String description = "yadda yadda"
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL, name, importance);
channel.setDescription(description);
notificationManager.createNotificationChannel(channel);
以下是生成通知的代码:
Notification.Builder notificationBuilder;
Intent notificationIntent = new Intent(context, BulbActivity.class);
notificationIntent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND); // Fix for https://code.google.com/p/android/issues/detail?id=53313
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
Intent serviceIntent = new Intent(context, RemoteViewToggleService.class);
serviceIntent.putExtra(WakeyService.KEY_REQUEST_SOURCE, WakeyService.REQUEST_SOURCE_NOTIFICATION);
PendingIntent actionPendingIntent = PendingIntent.getService(context, 0, serviceIntent, PendingIntent.FLAG_CANCEL_CURRENT);
_toggleAction = new Notification.Action(R.drawable.ic_power_settings_new_black_24dp, context.getString(R.string.toggle_wakey), actionPendingIntent);
notificationBuilder= new Notification.Builder(context)
.setContentTitle(context.getString(R.string.app_name))
.setContentIntent(contentIntent)
.addAction(_toggleAction);
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
notificationBuilder.setChannelId(NOTIFICATION_CHANNEL);
}
notificationBuilder.setSmallIcon(icon);
notificationBuilder.setContentText(contentText);
_toggleAction.title = actionText;
int priority = getNotificationPriority(context);
notificationBuilder.setPriority(priority);
notificationBuilder.setOngoing(true);
Notification notification = notificationBuilder.build();
notificationManager.notify(NOTIFICATION_ID, notification);
答案 0 :(得分:32)
我想我已经学到了一些可以得到答案的东西:
所以,我更改为包含Play商店的图片,它显示通知正确(也许该通知的频道是由Play商店设置的?),让我更新到最新的Google Play服务,从那以后我就没有看到那个警告。
所以,长话短说(太迟了) - 使用Android O,如果您使用的是Google Play服务&在模拟器上进行测试,选择包含Play商店的图像,或忽略吐司(祝你好运!)。
答案 1 :(得分:7)
首先创建通知渠道:
public static final String NOTIFICATION_CHANNEL_ID = "4565";
//Notification Channel
CharSequence channelName = NOTIFICATION_CHANNEL_NAME;
int importance = NotificationManager.IMPORTANCE_LOW;
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, NOTIFICATION_CHANNEL_NAME, importance);
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.RED);
notificationChannel.enableVibration(true);
notificationChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.createNotificationChannel(notificationChannel);
然后在构造函数中使用通道id:
final NotificationCompat.Builder builder = new NotificationCompat.Builder(context, NOTIFICATION_CHANNEL_ID)
.setDefaults(Notification.DEFAULT_ALL)
.setSmallIcon(R.drawable.ic_timers)
.setVibrate(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400})
.setSound(null)
.setChannelId(NOTIFICATION_CHANNEL_ID)
.setContent(contentView)
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setLargeIcon(picture)
.setTicker(sTimer)
.setContentIntent(pendingIntent)
.setAutoCancel(false);
答案 2 :(得分:6)
我遇到了同样的问题,并使用构造函数
解决了这个问题 new Notification.Builder(Context context, String channelId)
,而不是deprecated onAPI级别> = 26(Android O):
new NotificationCompat.Builder(Context context)
如果您的notificationBuilder是使用不推荐使用的构造函数构建的,则以下代码不起作用:
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
notificationBuilder.setChannelId(NOTIFICATION_CHANNEL);}
答案 3 :(得分:4)
您必须先创建一个频道。
private void createNotificationChannel() {
// Create the NotificationChannel, but only on API 26+ because
// the NotificationChannel class is new and not in the support library
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);
// Register the channel with the system; you can't change the importance
// or other notification behaviors after this
NotificationManager notificationManager = getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);
}
}
public void notifyThis(String title, String message) {
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.green_circle)
.setContentTitle(title)
.setContentText(message)
.setPriority(NotificationCompat.PRIORITY_DEFAULT);
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
// notificationId is a unique int for each notification that you must define
notificationManager.notify(0, mBuilder.build());
}
最后,您调用此方法:
createNotificationChannel();
notifyThis("My notification", "Hello World!");
答案 4 :(得分:2)
使用以下代码创建通知:
Notification notification = new Notification.Builder(MainActivity.this)
.setContentTitle("New Message")
.setContentText("You've received new messages.")
.setSmallIcon(R.mipmap.ic_launcher)
.setChannelId(channelId)
.build();
不使用:
Notification notification = new NotificationCompat.Builder(MainActivity.this)
.setContentTitle("Some Message")
.setContentText("You've received new messages!")
.setSmallIcon(R.mipmap.ic_launcher)
.setChannel(channelId)
.build();
答案 5 :(得分:1)
您必须先创建一个NotificationChannel
val notificationChannel = NotificationChannel("channelId", "channelName", NotificationManager.IMPORTANCE_DEFAULT)
notificationManager.createNotificationChannel(notificationChannel);
这是显示API 26 +
通知的唯一方法答案 6 :(得分:0)
我遇到了同样的问题。它通过创建NotificationChannel并将新创建的通道添加到通知管理器来解决。
答案 7 :(得分:-4)
我还想补充一点,如果您使用的是构建工具v26 +,则会收到此错误:
应用/ build.grade 强>:
compileSdkVersion 26
buildToolsVersion "26.0.2"
defaultConfig {
targetSdkVersion 26
降级到最低版本应该可以正常工作。