Java 在我关闭应用程序或使用WorkManager、AlarmManager或Jobscheduler重新启动后,任务永远不会执行
我想要达到的目标:Java 在我关闭应用程序或使用WorkManager、AlarmManager或Jobscheduler重新启动后,任务永远不会执行,java,android,Java,Android,我想要达到的目标: 无论应用程序被关闭或设备重新启动,任务都将在后台持续运行。假设我正在将联系人同步到服务器,我需要每分钟检查是否有新联系人,这是我任务的一个非常重要的要求 如果我们进入开发者设置,然后“运行服务”,那么这些服务永远不会停止。并在设备重新启动后继续重新启动。例如facebookServices或WhatsApp 我正在使用的物理设备的信息: Android 10. API Level 29 我尝试过的事情: JobScheduler WorkManager Service (
facebookServices
或WhatsApp
Android 10.
API Level 29
我尝试过的事情:
JobScheduler
WorkManager
Service (startService())
JobIntentService
AlarmManager
我面临的问题:
我读了很多文章,博客,看了很多视频,但还是没能实现我真正想要的。我也知道如果我使用带有通知通道的foregroundService,我的服务将不会被终止和持久化,但我不希望这样,因为FaceBooks服务必须在没有任何通知通道的情况下运行,它们只运行后台服务,即使在API级别29上,在Android O之后有所有后台限制
java.lang.IllegalStateException:不允许启动服务意图
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.basicplayer">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".MyAlarmService"
android:enabled="true"
android:exported="true"
/>
<receiver android:name=".MyAlarmReceiver"
android:enabled="true"
android:exported="true"
>
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
</application>
</manifest>
MyAlarmService.java
package com.example.basicplayer;
import android.app.Notification;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.provider.Settings;
import androidx.annotation.Nullable;
public class MyAlarmService extends Service {
private MediaPlayer mediaPlayer;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
mediaPlayer = MediaPlayer.create(this,
Settings.System.DEFAULT_ALARM_ALERT_URI);
mediaPlayer.setLooping(true);
mediaPlayer.start();
return START_STICKY;
}
@Override
public void onCreate() {
super.onCreate();
}
@Override
public void onDestroy() {
super.onDestroy();
try{
startService(new Intent(this, MyAlarmService.class));
}catch (Exception e){
e.printStackTrace();
}
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
MainActivity.java
package com.example.basicplayer;
import androidx.appcompat.app.AppCompatActivity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.provider.Settings;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setAlarm();
}
private void setAlarm() {
//getting the alarm manager
AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
//creating a new intent specifying the broadcast receiver
Intent i = new Intent(this, MyAlarmReceiver.class);
//creating a pending intent using the intent
PendingIntent pi = PendingIntent.getBroadcast(this, 0, i, 0);
//setting the repeating alarm that will be fired every day
am.setRepeating(AlarmManager.RTC, 10000, AlarmManager.INTERVAL_FIFTEEN_MINUTES, pi);
Toast.makeText(this, "Alarm is set", Toast.LENGTH_SHORT).show();
}
}
你们能帮忙吗?在新版安卓系统中,对后台运行进程进行了限制。他们这样做的原因是为了提供电池优化。我认为您应该使用workmanager库。这是一个很棒的后台处理库。此外,当设备重新启动时,您可以使用workmanager启动作业。我为您找到了一个答案:我的一项工作是不可延迟的,需要每60秒执行一次,在这种情况下可以做什么?
package com.example.basicplayer;
import androidx.appcompat.app.AppCompatActivity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.provider.Settings;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setAlarm();
}
private void setAlarm() {
//getting the alarm manager
AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
//creating a new intent specifying the broadcast receiver
Intent i = new Intent(this, MyAlarmReceiver.class);
//creating a pending intent using the intent
PendingIntent pi = PendingIntent.getBroadcast(this, 0, i, 0);
//setting the repeating alarm that will be fired every day
am.setRepeating(AlarmManager.RTC, 10000, AlarmManager.INTERVAL_FIFTEEN_MINUTES, pi);
Toast.makeText(this, "Alarm is set", Toast.LENGTH_SHORT).show();
}
}