[英]Notification not working in Android when using with AlarmManager and Service
I was creating a simple notification app, but which is not showing any notification.我正在创建一个简单的通知应用程序,但没有显示任何通知。 I have used BroadcastReceiver and service for showing it up.
我已经使用 BroadcastReceiver 和服务来显示它。 It doesn't showing any errors but still not working.
它没有显示任何错误,但仍然无法正常工作。
MainActivity.java主活动.java
package com.example.myapplication;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity
{
int NOTIFICATION_REMINDER_NIGHT = 1;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setBroadcast(this);
}
void setBroadcast(Context context)
{
Intent notifyIntent = new Intent(this, MyReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast
(context, NOTIFICATION_REMINDER_NIGHT, notifyIntent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(),
1000 * 60 * 15, pendingIntent);
}
}
MyNewIntentService.java我的新意图服务.java
package com.example.myapplication;
import android.app.IntentService;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.IntentSender;
import androidx.annotation.Nullable;
import androidx.core.app.NotificationManagerCompat;
public class MyNewIntentService extends IntentService
{
private static final int NOTIFICATION_ID = 1;
@Override
public void onCreate() {
super.onCreate();
startForeground(NOTIFICATION_ID, new Notification());
}
/**
* @param name
* @deprecated
*/
public MyNewIntentService(String name) {
super(name);
}
public MyNewIntentService(){
super("service");
}
@Override
protected void onHandleIntent(@Nullable Intent intent)
{
Notification.Builder builder = new Notification.Builder(this);
builder.setContentTitle("My title");
builder.setContentText("This is the body");
builder.setSmallIcon(R.drawable.ic_launcher_background);
Intent notifyIntent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this,2, notifyIntent, PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(pendingIntent);
Notification notificationCompat = builder.build();
NotificationManagerCompat managerCompat = NotificationManagerCompat.from(this);
managerCompat.notify(NOTIFICATION_ID, notificationCompat);
}
}
MyReceiver.java我的接收器.java
package com.example.myapplication;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
public class MyReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent)
{
Intent intent1 = new Intent(context, MyNewIntentService.class);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
context.startForegroundService(new Intent(context, MyNewIntentService.class));
} else {
context.startService(new Intent(context, MyNewIntentService.class));
}
}
}
AndroidManifest.xml AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.MyApplication"
tools:targetApi="31">
<service
android:name=".MyNewIntentService"
android:enabled="true"
android:exported="true"></service>
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
<receiver android:name=".MyReceiver"
android:enabled="true"
android:exported="false"/>
</application>
</manifest>
log日志
android.app.RemoteServiceException:
Bad notification for startForeground
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2275)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:257)
at android.app.ActivityThread.main(ActivityThread.java:8246)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:626)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1016)
what's the problem?有什么问题? is there any os validations.
是否有任何操作系统验证。 Thanks.
谢谢。
This error is likely because you're just using an empty notification.此错误很可能是因为您只是在使用空通知。 Take your logic from
onHandleIntent
, and use it to construct the notification when calling context.startForeground(...)
从
onHandleIntent
中获取您的逻辑,并在调用context.startForeground(...)
时使用它来构造通知
Also, AlarmManager::setRepeating
is not reliable in modern versions of Android.此外,
AlarmManager::setRepeating
在现代版本的 Android 中并不可靠。 I would recommend you use setAlarmClock
or setExactAndAllowWhileIdle
instead.我建议您改用
setAlarmClock
或setExactAndAllowWhileIdle
。
I have a complete example of an alarm app on my GitHub here , which may be useful for you.我的 GitHub 上有一个完整的警报应用程序示例,可能对您有用。
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