Intent deleteIntent = new Intent(this, MainActivity.class); deleteIntent.setAction(ACTION_DELETE_NOTIFICATION); PendingIntent pendingDeleteIntent = PendingIntent.getBroadcast(this, 0, deleteIntent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE); NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "com.example.myapplication") .setSmallIcon(R.drawable.ic_launcher_background) .setContentTitle("My notification") .setContentText("Hello World!") .addAction(R.drawable.ic_launcher_foreground, "Delete", pendingDeleteIntent); Notification build = builder.build(); NotificationManagerCompat.from(this).notify(CHANNEL_CHARGING_NOTIFICATION_ID, build); } 报错说 No Channel found for pkg=com.example.myapplication 如何解决

这个错误提示是因为在创建通知时使用了不存在的通知渠道，需要先创建一个通知渠道，然后将其与通知相关联。可以按照以下步骤解决：

1. 在应用的创建时，创建通知渠道，代码如下：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    NotificationChannel channel = new NotificationChannel("com.example.myapplication", "MyApp", NotificationManager.IMPORTANCE_HIGH);
    NotificationManager notificationManager = getSystemService(NotificationManager.class);
    notificationManager.createNotificationChannel(channel);
}

2. 在创建通知时，指定通知渠道，代码如下：

NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "com.example.myapplication")
        .setSmallIcon(R.drawable.ic_launcher_background)
        .setContentTitle("My notification")
        .setContentText("Hello World!")
        .addAction(R.drawable.ic_launcher_foreground, "Delete", pendingDeleteIntent);

Notification build = builder.build();
NotificationManagerCompat.from(this).notify(CHANNEL_CHARGING_NOTIFICATION_ID, build);

这样就可以解决该错误。