奥利奥中未显示通知
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【中文标题】奥利奥中未显示通知【英文标题】：Notification not showing in Oreo 【发布时间】：2017-08-22 22:13:54 【问题描述】：普通通知生成器不会在 android O 上显示通知。
如何在 Android 8 Oreo 上显示通知？
是否有任何新代码要添加以在 Android O 上显示通知？
【问题讨论】：
我忘记将“.setChannelId”设置为 NotificationCompat.Builder，现在它在 oreo(8.0) 中工作 【参考方案1】：在 Android O 中，必须在通知生成器中使用频道
以下是示例代码：
// Sets an ID for the notification, so it can be updated.
int notifyID = 1;
String CHANNEL_ID = "my_channel_01";// The id of the channel.
CharSequence name = getString(R.string.channel_name);// The user-visible name of the channel.
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, name, importance);
// Create a notification and set the notification channel.
Notification notification = new Notification.Builder(MainActivity.this)
.setContentTitle("New Message")
.setContentText("You've received new messages.")
.setSmallIcon(R.drawable.ic_notify_status)
.setChannelId(CHANNEL_ID)
.build();
或通过以下方式处理兼容性：
NotificationCompat notification =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.notification_icon)
.setContentTitle("My notification")
.setContentText("Hello World!")
.setChannelId(CHANNEL_ID).build();
现在让它通知
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.createNotificationChannel(mChannel);
// Issue the notification.
mNotificationManager.notify(notifyID , notification);
或者，如果您想要一个简单的修复，请使用以下代码：
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
mNotificationManager.createNotificationChannel(mChannel);
更新： NotificationCompat.Builder reference
NotificationCompat.Builder(Context context)
此构造函数在 API 级别 26.0.0 中已弃用 所以你应该使用
Builder(Context context, String channelId)
所以不需要setChannelId 使用新的构造函数。
你应该使用目前最新的 AppCompat 库 26.0.2
compile "com.android.support:appcompat-v7:26.0.+"
来源Android Developers Channel on Youtube
另外，您可以查看official Android Docs
【讨论】：
您还必须创建一个频道才能使用它。见developer.android.com/reference/android/app/… setChannel 已弃用，取而代之的是 setChannelId 不，如果您没有在应用安装生命周期内至少创建一次频道，则会收到错误消息。 @amorenew 显然我的频道名称有误。它现在工作。谢谢，但您的回答不完整...您必须先使用 mNotificationManager.createNotificationChannel(mChannel); 创建一个频道； （我在我的应用程序类中这样做了）......请参阅谷歌文档。也许将此添加到您的答案中。 我应该针对哪些依赖项/版本来获取新的NotificationCompat.Builder(Context, String) 构造函数？我正在使用（除其他外）：-compileSdkVersion 26-buildToolsVersion '26.0.2'-compile 'com.android.support:appcompat-v7:26.0.0-beta2'，但它仍然不接受使用上下文和字符串的构造函数。有什么想法吗？【参考方案2】：
在这里我发布了一些带有意图处理的快速解决方案功能
public void showNotification(Context context, String title, String body, Intent intent)
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
int notificationId = 1;
String channelId = "channel-01";
String channelName = "Channel Name";
int importance = NotificationManager.IMPORTANCE_HIGH;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O)
NotificationChannel mChannel = new NotificationChannel(
channelId, channelName, importance);
notificationManager.createNotificationChannel(mChannel);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context, channelId)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle(title)
.setContentText(body);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addNextIntent(intent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
notificationManager.notify(notificationId, mBuilder.build());
【讨论】：
这里也一样。只有一个为 FCM 和 Android >= 8 工作了 4 个我。 快速简单 非常感谢。我花了几个小时排查为什么通知不显示。因此，如果您只想弹出一个，只需确保您已使用 NotificationManager for Android Oreo+ 创建了 NotificationChannel。 这段代码最容易实现和理解，甚至在 2019 年 12 月都是最新的。谢谢。 Android中notificationManager.notify和startForeground有什么区别？【参考方案3】：除了this answer，还需要创建通知通道才能使用。
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
/* Create or update. */
NotificationChannel channel = new NotificationChannel("my_channel_01",
"Channel human readable title",
NotificationManager.IMPORTANCE_DEFAULT);
mNotificationManager.createNotificationChannel(channel);
此外，仅当您的 targetSdkVersion 为 26 或更高时，您才需要使用通道。
如果您使用的是 NotificationCompat.Builder，您还需要更新到支持库的测试版：https://developer.android.com/topic/libraries/support-library/revisions.html#26-0-0-beta2（以便能够在兼容构建器上调用setChannelId）。
请小心，因为此库更新将 minSdkLevel 提高到 14。
【讨论】：
如果 min api 低于 26，这将引发警告。在创建通道之前添加 @TargetApi(26) 以抑制警告。 如果您在代码示例中有类似 if 它不会产生警告，快速修复有不同的建议，其中之一是通过 if 版本检查包围代码。如果您调整 if 版本检查，Android Studio 可能会感到困惑并且可能无法检测到它。【参考方案4】：public class MyFirebaseMessagingServices extends FirebaseMessagingService
private NotificationChannel mChannel;
private NotificationManager notifManager;
@Override
public void onMessageReceived(RemoteMessage remoteMessage)
if (remoteMessage.getData().size() > 0)
try
JSONObject jsonObject = new JSONObject(remoteMessage.getData());
displayCustomNotificationForOrders(jsonObject.getString("title"), jsonObject.getString("description"));
catch (JSONException e)
e.printStackTrace();
private void displayCustomNotificationForOrders(String title, String description)
if (notifManager == null)
notifManager = (NotificationManager) getSystemService
(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
NotificationCompat.Builder builder;
Intent intent = new Intent(this, Dashboard.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent;
int importance = NotificationManager.IMPORTANCE_HIGH;
if (mChannel == null)
mChannel = new NotificationChannel
("0", title, importance);
mChannel.setDescription(description);
mChannel.enableVibration(true);
notifManager.createNotificationChannel(mChannel);
builder = new NotificationCompat.Builder(this, "0");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
Intent.FLAG_ACTIVITY_SINGLE_TOP);
pendingIntent = PendingIntent.getActivity(this, 1251, intent, PendingIntent.FLAG_ONE_SHOT);
builder.setContentTitle(title)
.setSmallIcon(getNotificationIcon()) // required
.setContentText(description) // required
.setDefaults(Notification.DEFAULT_ALL)
.setAutoCancel(true)
.setLargeIcon(BitmapFactory.decodeResource
(getResources(), R.mipmap.logo))
.setBadgeIconType(R.mipmap.logo)
.setContentIntent(pendingIntent)
.setSound(RingtoneManager.getDefaultUri
(RingtoneManager.TYPE_NOTIFICATION));
Notification notification = builder.build();
notifManager.notify(0, notification);
else
Intent intent = new Intent(this, Dashboard.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = null;
pendingIntent = PendingIntent.getActivity(this, 1251, intent, PendingIntent.FLAG_ONE_SHOT);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setContentTitle(title)
.setContentText(description)
.setAutoCancel(true)
.setColor(ContextCompat.getColor(getBaseContext(), R.color.colorPrimary))
.setSound(defaultSoundUri)
.setSmallIcon(getNotificationIcon())
.setContentIntent(pendingIntent)
.setStyle(new NotificationCompat.BigTextStyle().setBigContentTitle(title).bigText(description));
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(1251, notificationBuilder.build());
private int getNotificationIcon()
boolean useWhiteIcon = (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP);
return useWhiteIcon ? R.mipmap.logo : R.mipmap.logo;
【讨论】：
不显示 NotificationCompat.Builder 通知上的 setChannelId(CHANNEL_ID)。【参考方案5】：如果26+ SDK版本收不到推送？
您的解决方案在这里：
public static void showNotification(Context context, String title, String messageBody)
boolean isLoggedIn = SessionManager.getInstance().isLoggedIn();
Log.e(TAG, "User logged in state: " + isLoggedIn);
Intent intent = null;
if (isLoggedIn)
//goto notification screen
intent = new Intent(context, MainActivity.class);
intent.putExtra(Extras.EXTRA_JUMP_TO, DrawerItems.ITEM_NOTIFICATION);
else
//goto login screen
intent = new Intent(context, LandingActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0 /* Request code */, intent, PendingIntent.FLAG_ONE_SHOT);
//Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
//Bitmap largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_app_notification_icon);
String channel_id = createNotificationChannel(context);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context, channel_id)
.setContentTitle(title)
.setContentText(messageBody)
.setStyle(new NotificationCompat.BigTextStyle().bigText(messageBody))
/*.setLargeIcon(largeIcon)*/
.setSmallIcon(R.drawable.app_logo_color) //needs white icon with transparent BG (For all platforms)
.setColor(ContextCompat.getColor(context, R.color.colorPrimaryDark))
.setVibrate(new long[]1000, 1000)
.setSound(Settings.System.DEFAULT_NOTIFICATION_URI)
.setContentIntent(pendingIntent)
.setPriority(Notification.PRIORITY_HIGH)
.setAutoCancel(true);
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify((int) ((new Date(System.currentTimeMillis()).getTime() / 1000L) % Integer.MAX_VALUE) /* ID of notification */, notificationBuilder.build());
public static String createNotificationChannel(Context context)
// NotificationChannels are required for Notifications on O (API 26) and above.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
// The id of the channel.
String channelId = "Channel_id";
// The user-visible name of the channel.
CharSequence channelName = "Application_name";
// The user-visible description of the channel.
String channelDescription = "Application_name Alert";
int channelImportance = NotificationManager.IMPORTANCE_DEFAULT;
boolean channelEnableVibrate = true;
// int channelLockscreenVisibility = Notification.;
// Initializes NotificationChannel.
NotificationChannel notificationChannel = new NotificationChannel(channelId, channelName, channelImportance);
notificationChannel.setDescription(channelDescription);
notificationChannel.enableVibration(channelEnableVibrate);
// notificationChannel.setLockscreenVisibility(channelLockscreenVisibility);
// Adds NotificationChannel to system. Attempting to create an existing notification
// channel with its original values performs no operation, so it's safe to perform the
// below sequence.
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
assert notificationManager != null;
notificationManager.createNotificationChannel(notificationChannel);
return channelId;
else
// Returns null for pre-O (26) devices.
return null;
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context, channel_id)
-> 在这里，您将在包含 26+ SDK 版本的设备中使用 channel_id 收到推送通知。
-> 因为，NotificationCompat.Builder(context) 已被弃用，现在您将使用具有两个参数的更新版本，一个是 context，另一个是 channel_id。
-> NotificationCompat.Builder(context, channel_id) 更新了方法。试试看。
-> 在 26+ SDK 版本的设备中，您每次都会创建 channel_id。
【讨论】：
谢谢我使用静态notifcation_id来通知【参考方案6】：将此类用于 Android 8 通知
public class NotificationHelper
private Context mContext;
private NotificationManager mNotificationManager;
private NotificationCompat.Builder mBuilder;
public static final String NOTIFICATION_CHANNEL_ID = "10001";
public NotificationHelper(Context context)
mContext = context;
/**
* Create and push the notification
*/
public void createNotification(String title, String message)
/**Creates an explicit intent for an Activity in your app**/
Intent resultIntent = new Intent(mContext , SomeOtherActivity.class);
resultIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
PendingIntent resultPendingIntent = PendingIntent.getActivity(mContext,
0 /* Request code */, resultIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder = new NotificationCompat.Builder(mContext);
mBuilder.setSmallIcon(R.mipmap.ic_launcher);
mBuilder.setContentTitle(title)
.setContentText(message)
.setAutoCancel(false)
.setSound(Settings.System.DEFAULT_NOTIFICATION_URI)
.setContentIntent(resultPendingIntent);
mNotificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O)
int importance = NotificationManager.IMPORTANCE_HIGH;
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);
assert mNotificationManager != null;
mBuilder.setChannelId(NOTIFICATION_CHANNEL_ID);
mNotificationManager.createNotificationChannel(notificationChannel);
assert mNotificationManager != null;
mNotificationManager.notify(0 /* Request Code */, mBuilder.build());
【讨论】：
【参考方案7】：首先，如果您不知道，从 Android Oreo（即 API 级别 26）开始，通知必须通过频道重新发送。
在这种情况下，许多教程可能会让您感到困惑，因为它们在 oreo 上方和下方显示了不同的通知示例。
所以这是一个在 oreo 上下运行的通用代码：
String CHANNEL_ID = "MESSAGE";
String CHANNEL_NAME = "MESSAGE";
NotificationManagerCompat manager = NotificationManagerCompat.from(MainActivity.this);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME,
NotificationManager.IMPORTANCE_DEFAULT);
manager.createNotificationChannel(channel);
Notification notification = new NotificationCompat.Builder(MainActivity.this,CHANNEL_ID)
.setSmallIcon(R.drawable.ic_android_black_24dp)
.setContentTitle(TitleTB.getText().toString())
.setContentText(MessageTB.getText().toString())
.build();
manager.notify(getRandomNumber(), notification); // In case you pass a number instead of getRandoNumber() then the new notification will override old one and you wont have more then one notification so to do so u need to pass unique number every time so here is how we can do it by "getRandoNumber()"
private static int getRandomNumber()
Date dd= new Date();
SimpleDateFormat ft =new SimpleDateFormat ("mmssSS");
String s=ft.format(dd);
return Integer.parseInt(s);
视频教程：YOUTUBE VIDEO
如果你想下载这个演示：GitHub Link
【讨论】：
【参考方案8】：适用于 Android O 以及较低 API 版本的 Android 通知演示应用程序。 这是GitHub-Demo 1 和GitHub-Demo 2 上的最佳演示应用程序。
【讨论】：
请考虑发布应用程序如何工作的最小代码 sn-p，而不是提供指向外部源的链接，而不注明来源/从属关系。 （这些来源也可能随时关闭，没有其他方法可以访问它们。）【参考方案9】：试试这个代码：
public class FirebaseMessagingServices extends com.google.firebase.messaging.FirebaseMessagingService
private static final String TAG = "MY Channel";
Bitmap bitmap;
@Override
public void onMessageReceived(RemoteMessage remoteMessage)
super.onMessageReceived(remoteMessage);
Utility.printMessage(remoteMessage.getNotification().getBody());
// Check if message contains a data payload.
if (remoteMessage.getData().size() > 0)
Log.d(TAG, "Message data payload: " + remoteMessage.getData());
String title = remoteMessage.getData().get("title");
String body = remoteMessage.getData().get("body");
String message = remoteMessage.getData().get("message");
String imageUri = remoteMessage.getData().get("image");
String msg_id = remoteMessage.getData().get("msg-id");
Log.d(TAG, "1: " + title);
Log.d(TAG, "2: " + body);
Log.d(TAG, "3: " + message);
Log.d(TAG, "4: " + imageUri);
if (imageUri != null)
bitmap = getBitmapfromUrl(imageUri);
sendNotification(message, bitmap, title, msg_id);
private void sendNotification(String message, Bitmap image, String title,String msg_id)
int notifyID = 0;
try
notifyID = Integer.parseInt(msg_id);
catch (NumberFormatException e)
e.printStackTrace();
String CHANNEL_ID = "my_channel_01"; // The id of the channel.
Intent intent = new Intent(this, HomeActivity.class);
intent.putExtra("title", title);
intent.putExtra("message", message);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
PendingIntent.FLAG_ONE_SHOT);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, "01")
.setContentTitle(title)
.setSmallIcon(R.mipmap.ic_notification)
.setStyle(new NotificationCompat.BigTextStyle()
.bigText(message))
.setContentText(message)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setChannelId(CHANNEL_ID)
.setContentIntent(pendingIntent);
if (image != null)
notificationBuilder.setStyle(new NotificationCompat.BigPictureStyle() //Set the Image in Big picture Style with text.
.bigPicture(image)
.setSummaryText(message)
.bigLargeIcon(null));
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) // For Oreo and greater than it, we required Notification Channel.
CharSequence name = "My New Channel"; // The user-visible name of the channel.
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel channel = new NotificationChannel(CHANNEL_ID,name, importance); //Create Notification Channel
notificationManager.createNotificationChannel(channel);
notificationManager.notify(notifyID /* ID of notification */, notificationBuilder.build());
public Bitmap getBitmapfromUrl(String imageUrl) //This method returns the Bitmap from Url;
try
URL url = new URL(imageUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap bitmap = BitmapFactory.decodeStream(input);
return bitmap;
catch (Exception e)
// TODO Auto-generated catch block
e.printStackTrace();
return null;
【讨论】：
我使用了这段代码，但是当应用程序在后台时，带有图像的亲爱的通知是不可见的，你有什么解决方案请帮忙。 这取决于一些因素，例如：- 1.您是否连接到网络..??? 2. 图片 url 是否正确（通过在浏览器上点击 imageurl 来检查 imageurl）【参考方案10】：这是 firebase api 版本 11.8.0 中的错误，因此如果您降低 API 版本，您将不会遇到此问题。
【讨论】：
其实我已经查过了。如果您正在使用 Android 模拟器 - 检查您在物理设备上的应用。新的模拟器不知何故不显示通知。 不，实际上这实际上是 firebase 11.8.0 版本中的一个错误，现在它已在较新的版本 12.0.0 中修复。参考官方发布说明：firebase.google.com/support/release-notes/android【参考方案11】：我在 Oreo 上遇到了同样的问题，发现如果您首先使用 NotificationManager.IMPORTANCE_NONE 创建您的频道，然后再更新它，该频道将保留原来的重要性级别。
这得到了Google Notification training documentation 的支持，其中指出：
创建通知通道后，您无法更改通知行为——用户此时拥有完全控制权。
删除并重新安装该应用后，您可以重置频道行为。
最好避免使用 IMPORTANCE_NONE，除非您想禁止该频道的通知，即使用静默通知。
【讨论】：
【参考方案12】：这就是你的做法
private fun sendNotification()
val notificationId = 100
val chanelid = "chanelid"
val intent = Intent(this, MainActivity::class.java)
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK)
val pendingIntent = PendingIntent.getActivity(this, 0, intent, 0)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) // you must create a notification channel for API 26 and Above
val name = "my channel"
val description = "channel description"
val importance = NotificationManager.IMPORTANCE_DEFAULT
val channel = NotificationChannel(chanelid, name, importance);
channel.setDescription(description);
// Register the channel with the system; you can't change the importance
// or other notification behaviors after this
val notificationManager = getSystemService(NotificationManager::class.java)
notificationManager.createNotificationChannel(channel)
val mBuilder = NotificationCompat.Builder(this, chanelid)
.setSmallIcon(R.drawable.ic_notification)
.setContentTitle("Want to Open My App?")
.setContentText("Open my app and see good things")
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setContentIntent(pendingIntent)
.setAutoCancel(true) // cancel the notification when clicked
.addAction(R.drawable.ic_check, "YES", pendingIntent) //add a btn to the Notification with a corresponding intent
val notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(notificationId, mBuilder.build());
阅读完整教程 => https://developer.android.com/training/notify-user/build-notification
【讨论】：
【参考方案13】：以下方法将显示通知，启用大文本和冻结（即使在用户滑动后通知也不会被删除）。我们需要 NotificationManager 服务
public static void showNotificationOngoing(Context context,String title)
NotificationManager notificationManager =
(NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
new Intent(context, MainActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);
Notification.Builder notificationBuilder = new Notification.Builder(context)
.setContentTitle(title + DateFormat.getDateTimeInstance().format(new Date()) + ":" + accuracy)
.setContentText(addressFragments.toString())
.setSmallIcon(R.mipmap.ic_launcher)
.setContentIntent(contentIntent)
.setOngoing(true)
.setStyle(new Notification.BigTextStyle().bigText(addressFragments.toString()))
.setAutoCancel(true);
notificationManager.notify(3, notificationBuilder.build());
删除通知的方法
public static void removeNotification(Context context)
NotificationManager notificationManager =
(NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);
notificationManager.cancelAll();
来源Link
【讨论】：
【参考方案14】：CHANNEL_ID in NotificationChannel 和 Notification.Builder 必须相同，试试这个代码：
String CHANNEL_ID = "my_channel_01";
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, "Solveta Unread", NotificationManager.IMPORTANCE_DEFAULT);
Notification.Builder notification = new Notification.Builder(getApplicationContext(), CHANNEL_ID);
【讨论】：
【参考方案15】：嗯，就我而言，我有 Android 8.1.0 和型号 vivo1811，我已经尝试了上述所有解决方案，但没有任何效果。
所以最后，我写信给 Firebase 支持，然后在进一步调试时，我得到了这个 - “向停止的应用广播失败”：确保应用没有被强制停止”。
这是 Firebase 团队的回复 ->
这是一个由电池优化引起的已知问题 由一些 OEM 实施。当一个应用在应用中被刷掉时 切换器，应用程序被视为被强制停止，这 不是默认的 Android 行为。不幸的副作用 这是因为它可能导致您的应用程序的 FCM 服务停止 跑步。我们正在努力从头开始改善这种行为，但是 实际修复必须来自 OEM 方面。
这里的 OEM 代表 原始设备制造商。
【讨论】：
【参考方案16】：您需要为 API 级别高于 26(oreo) 创建一个通知通道。
`NotificationChannel channel = new NotificationChannel(STRING_ID,CHANNEL_NAME,NotificationManager.IMPORTANCE_HIGH);
STRING_ID = string notification channelid 和 Notification.Builder 中的一样
`Notification notification = new Notification.Builder(this,STRING_ID)
.setSmallIcon(android.R.drawable.ic_menu_help)
.setContentTitle("Hello Notification")
.setContentText("It is Working")
.setContentIntent(pendingIntent)
.build();`
通知和通知中的频道 id 应该相同 整个代码是这样的.. `
@RequiresApi(api = Build.VERSION_CODES.O)
private void callNotification2()
Intent intent = new Intent(getApplicationContext(),MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this,11,
intent,PendingIntent.FLAG_UPDATE_CURRENT);
Notification notification = new Notification.Builder(this,"22")
.setSmallIcon(android.R.drawable.ic_menu_help)
.setContentTitle("Hello Notification")
.setContentText("It is Working")
.setContentIntent(pendingIntent)
.build();
NotificationChannel channel = new
NotificationChannel("22","newName",NotificationManager.IMPORTANCE_HIGH);
NotificationManager manager = (NotificationManager)
getSystemService(NOTIFICATION_SERVICE);
manager.createNotificationChannel(channel);
manager.notify(11,notification);
'
【讨论】：
【参考方案17】：对于在尝试上述解决方案后遇到此问题的任何人，请确保创建通知通道时使用的通道 ID 与您在通知构建器中设置的通道 ID相同。
const val CHANNEL_ID = "EXAMPLE_CHANNEL_ID"
// create notification channel
val notificationChannel = NotificationChannel(CHANNEL_ID,
NOTIFICATION_NAME, NotificationManager.IMPORTANCE_HIGH)
// building notification
NotificationCompat.Builder(context)
.setSmallIcon(android.R.drawable.ic_input_add)
.setContentTitle("Title")
.setContentText("Subtitle")
.setPriority(NotificationCompat.PRIORITY_MAX)
.setChannelId(CHANNEL_ID)
【讨论】：
【参考方案18】：private void addNotification()
NotificationCompat.Builder builder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher_background)
.setContentTitle("Notifications Example")
.setContentText("This is a test notification");
Intent notificationIntent = new Intent(this, MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(contentIntent);
// Add as notification
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O)
NotificationChannel nChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "NOTIFICATION_CHANNEL_NAME", NotificationManager.IMPORTANCE_HIGH);
nChannel.enableLights(true);
assert manager != null;
builder.setChannelId(NOTIFICATION_CHANNEL_ID);
manager.createNotificationChannel(nChannel);
assert manager != null;
manager.notify(0, builder.build());
【讨论】：
【参考方案19】：NotificationCompat.Builder(Context context)
对于大于或等于 android Oreo 的版本已弃用。您可以将实现更改为使用
NotificationCompat.Builder(Context context, String channelId)
【讨论】：
【参考方案20】：fun pushNotification(message: String?, clickAtion: String?)
val ii = Intent(clickAtion)
ii.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
val pendingIntent = PendingIntent.getActivity(this, REQUEST_CODE, ii, PendingIntent.FLAG_ONE_SHOT)
val soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
val largIcon = BitmapFactory.decodeResource(applicationContext.resources,
R.mipmap.ic_launcher)
val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
val channelId = "default_channel_id"
val channelDescription = "Default Channel"
// Since android Oreo notification channel is needed.
//Check if notification channel exists and if not create one
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O)
var notificationChannel = notificationManager.getNotificationChannel(channelId)
if (notificationChannel != null)
val importance = NotificationManager.IMPORTANCE_HIGH //Set the importance level
notificationChannel = NotificationChannel(channelId, channelDescription, importance)
// notificationChannel.lightColor = Color.GREEN //Set if it is necesssary
notificationChannel.enableVibration(true) //Set if it is necesssary
notificationManager.createNotificationChannel(notificationChannel)
val noti_builder = NotificationCompat.Builder(this)
.setContentTitle("MMH")
.setContentText(message)
.setSmallIcon(R.drawable.ic_launcher_background)
.setChannelId(channelId)
.build()
val random = Random()
val id = random.nextInt()
notificationManager.notify(id,noti_builder)
else
val notificationBuilder = NotificationCompat.Builder(this)
.setSmallIcon(R.mipmap.ic_launcher).setColor(resources.getColor(R.color.colorPrimary))
.setVibrate(longArrayOf(200, 200, 0, 0, 0))
.setContentTitle(getString(R.string.app_name))
.setLargeIcon(largIcon)
.setContentText(message)
.setAutoCancel(true)
.setStyle(NotificationCompat.BigTextStyle().bigText(message))
.setSound(soundUri)
.setContentIntent(pendingIntent)
val random = Random()
val id = random.nextInt()
notificationManager.notify(id, notificationBuilder.build())
【讨论】：
虽然这段代码 sn-p 可以解决问题，但它没有解释为什么或如何回答这个问题。请include an explanation for your code，因为这确实有助于提高您的帖子质量。请记住，您正在为将来的读者回答问题，而这些人可能不知道您的代码建议的原因。您可以使用edit 按钮改进此答案以获得更多选票和声誉！【参考方案21】：下面的代码在 Oreo 中对我有用，你可以试试这个。希望它对你有用
private void sendNotification(Context ctx, String title, int notificationNumber, String message, String subtext, Intent intent) 试试
PendingIntent pendingIntent = PendingIntent.getActivity(ctx, notificationNumber, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
Uri url = null;
NotificationCompat.Builder notificationBuilder = null;
try
if (Build.VERSION.SDK_INT >= 26)
try
NotificationManager notificationManager = (NotificationManager)getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.deleteNotificationChannel(CHANNEL_ID_1);
notificationManager.deleteNotificationChannel(CHANNEL_ID_2);
if(!intent.getStringExtra("type").equalsIgnoreCase(""+TYPE_REQUEST))
NotificationChannel breaking = new NotificationChannel(CHANNEL_ID_1, CHANNEL_ID_1_NAME, NotificationManager.IMPORTANCE_HIGH);
breaking.setShowBadge(false);
breaking.enableLights(true);
breaking.enableVibration(true);
breaking.setLightColor(Color.WHITE);
breaking.setVibrationPattern(new long[]100, 200, 100, 200, 100, 200, 100);
breaking.setSound(url,new AudioAttributes.Builder().build());
notificationBuilder = new NotificationCompat.Builder(this,CHANNEL_ID_1)
.setSmallIcon(R.mipmap.ic_launcher);
notificationManager.createNotificationChannel(breaking);
else
NotificationChannel politics = new NotificationChannel(CHANNEL_ID_2,CHANNEL_ID_2_NAME, NotificationManager.IMPORTANCE_DEFAULT);
politics.setShowBadge(false);
politics.enableLights(true);
politics.enableVibration(true);
politics.setLightColor(Color.BLUE);
politics.setVibrationPattern(new long[]100, 200, 100, 200, 100);
politics.setSound(url,new AudioAttributes.Builder().build());
notificationBuilder = new NotificationCompat.Builder(this,CHANNEL_ID_2)
.setSmallIcon(R.mipmap.ic_launcher);
notificationManager.createNotificationChannel(politics);
catch (Exception e)
e.printStackTrace();
else
notificationBuilder = new NotificationCompat.Builder(ctx)
.setSmallIcon(R.mipmap.ic_launcher);
catch (Exception e)
e.printStackTrace();
if (notificationBuilder == null)
notificationBuilder = new NotificationCompat.Builder(ctx)
.setSmallIcon(R.mipmap.ic_launcher);
notificationBuilder.setContentTitle(title);
notificationBuilder.setSubText(subtext);
notificationBuilder.setAutoCancel(true);
notificationBuilder.setContentIntent(pendingIntent);
notificationBuilder.setNumber(notificationNumber);
NotificationManager notificationManager =
(NotificationManager) ctx.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(notificationNumber, notificationBuilder.build());
catch (Exception e)
e.printStackTrace();
【讨论】：
【参考方案22】：在 android Oreo 中，通知应用是通过使用通道和 NotificationHelper 类完成的。它应该有一个通道 id 和通道名称。
首先你必须创建一个 NotificationHelper 类
public class NotificationHelper extends ContextWrapper
private static final String EDMT_CHANNEL_ID="com.example.safna.notifier1.EDMTDEV";
private static final String EDMT_CHANNEL_NAME="EDMTDEV Channel";
private NotificationManager manager;
public NotificationHelper(Context base)
super(base);
createChannels();
private void createChannels()
NotificationChannel edmtChannel=new NotificationChannel(EDMT_CHANNEL_ID,EDMT_CHANNEL_NAME,NotificationManager.IMPORTANCE_DEFAULT);
edmtChannel.enableLights(true);
edmtChannel.enableVibration(true);
edmtChannel.setLightColor(Color.GREEN);
edmtChannel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
getManager().createNotificationChannel(edmtChannel);
public NotificationManager getManager()
if (manager==null)
manager=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
return manager;
public NotificationCompat.Builder getEDMTChannelNotification(String title,String body)
return new NotificationCompat.Builder(getApplicationContext(),EDMT_CHANNEL_ID)
.setContentText(body)
.setContentTitle(title)
.setSmallIcon(R.mipmap.ic_launcher_round)
.setAutoCancel(true);
在活动xml文件中创建一个按钮，然后在主活动中
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
helper=new NotificationHelper(this);
btnSend=(Button)findViewById(R.id.btnSend);
btnSend.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
String title="Title";
String content="Content";
Notification.Builder builder=helper.getEDMTChannelNotification(title,content);
helper.getManager().notify(new Random().nextInt(),builder.build());
);
然后运行你的项目
【讨论】：
【参考方案23】：我遇到了这个问题，但找到了一个独特的解决方案。 对我来说这是旧代码
String NOTIFICATION_CHANNEL_ID = "com.codedevtech.emplitrack";
工作代码是
String NOTIFICATION_CHANNEL_ID = "emplitrack_channel";
可能是频道 ID 不应包含点 '.'
【讨论】：
【参考方案24】： NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, "CHANNEL_ID")
........
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
CharSequence name = "Hello";// The user-visible name of the channel.
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, name, importance);
mNotificationManager.createNotificationChannel(mChannel);
mNotificationManager.notify(notificationId, notificationBuilder.build());
【讨论】：
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