Java 不允许启动服务 Intent - Android Oreo
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/51353493/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Not allowed to start service Intent - Android Oreo
提问by Marcus Smith
I am currently using the startWakefulService function which is crashing in Oreo. I realise I either have to switch to startForegroundService() and use a foreground service, or switch to JobIntentService but based on my code below I am not sure what to do. (Sorry I am an android novice). Any points in the right direction will be greatly appreciated.
我目前正在使用在 Oreo 中崩溃的 startWakefulService 函数。我意识到我要么必须切换到 startForegroundService() 并使用前台服务，要么切换到 JobIntentService 但根据我下面的代码，我不确定该怎么做。（对不起，我是一个android新手）。任何正确方向的观点将不胜感激。
public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// Explicitly specify that GCMIntentService will handle the intent.
ComponentName comp = new ComponentName(context.getPackageName(), GCMIntentService.class.getName());
// Start the service, keeping the device awake while it is launching.
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}
This is the current error I get when run on Android 8.x
这是我在 Android 8.x 上运行时遇到的当前错误
Fatal Exception: java.lang.RuntimeException Unable to start receiver com.heyjude.heyjudeapp.gcm.GcmBroadcastReceiver: java.lang.IllegalStateException: Not allowed to start service Intent { act=com.google.android.c2dm.intent.RECEIVE flg=0x1000010 pkg=com.app.app cmp=com.app.app/.gcm.GCMIntentService (has extras) }: app is in background uid UidRecord{f602fba u0a114 RCVR idle procs:1 seq(0,0,0)}
致命异常：java.lang.RuntimeException 无法启动接收器 com.heyjude.heyjudeapp.gcm.GcmBroadcastReceiver：java.lang.IllegalStateException：不允许启动服务 Intent { act=com.google.android.c2dm.intent.RECEIVE flg= 0x1000010 pkg=com.app.app cmp=com.app.app/.gcm.GCMIntentService（有附加功能）}：应用在后台 uid UidRecord{f602fba u0a114 RCVR idle procs:1 seq(0,0,0)}
采纳答案by Abdulmoiz Esmail
I experience the same behaviour.
我经历了同样的行为。
Why this issue happens?
为什么会出现这个问题？
Due to the new Background Execution Limitsof Android 8 and you should not start services background.
由于Android 8的新后台执行限制，您不应启动服务后台。
How I fixed it
我是如何修复它的
Migrate your GCMIntetServiceto JobIntentServiceinstead of IntentService.
迁移GCMIntetService到JobIntentService而不是IntentService.
Please follow this steps: 1) Add the BIND_JOB_SERVICE permission to your service:
请按照以下步骤操作：1) 为您的服务添加 BIND_JOB_SERVICE 权限：
<service android:name=".service.GCMIntentService"
android:exported="false"
android:permission="android.permission.BIND_JOB_SERVICE"/>
2) In your GCMIntentService, instead extending the IntentService, use android.support.v4.app.JobIntentServiceand override onHandleWork
then remove the overridein you onHandleIntent.
2）在您的 中GCMIntentService，而不是扩展IntentService，使用android.support.v4.app.JobIntentService并覆盖 onHandleWork 然后删除override您中的onHandleIntent。
public class GCMIntentService extends JobIntentService {
// Service unique ID
static final int SERVICE_JOB_ID = 50;
// Enqueuing work in to this service.
public static void enqueueWork(Context context, Intent work) {
enqueueWork(context, GCMIntentService.class, SERVICE_JOB_ID, work);
}
@Override
protected void onHandleWork(@NonNull Intent intent) {
onHandleIntent(intent);
}
private void onHandleIntent(Intent intent) {
//Handling of notification goes here
}
}
Then finally, in your GCMBroadcastReceiver, enqueue your GCMIntentService.
然后最后，在您的 中GCMBroadcastReceiver，将您的GCMIntentService.
public class GCMBroadcastReceiver extends WakefulBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// Explicitly specify that GcmIntentService will handle the intent.
ComponentName comp = new ComponentName(context.getPackageName(),
GCMIntentService.class.getName());
// Start the service, keeping the device awake while it is launching.
// startWakefulService(context, (intent.setComponent(comp)));
//setResultCode(Activity.RESULT_OK);
GCMIntentService.enqueueWork(context, (intent.setComponent(comp)));
}
}
This implementation work for me after we update our target sdk to 27 and I hope it works for you.
在我们将目标 sdk 更新到 27 之后，这个实现对我有用，我希望它对你有用。
回答by Sagar
Based on the documentation:
基于文档：
As of Android O, background check restrictions make this class no longer generally useful. (It is generally not safe to start a service from the receipt of a broadcast, because you don't have any guarantees that your app is in the foreground at this point and thus allowed to do so.) Instead, developers should use android.app.job.JobScheduler to schedule a job, and this does not require that the app hold a wake lock while doing so(the system will take care of holding a wake lock for the job).
从 Android O 开始，背景检查限制使此类不再普遍有用。（从接收到广播开始服务通常是不安全的，因为此时您无法保证您的应用程序在前台，因此允许这样做。）相反，开发人员应该使用 android。 app.job.JobScheduler 来安排作业，这不需要应用程序在执行此操作时持有唤醒锁（系统将负责为作业持有唤醒锁）。
Only alternative is to start a ForeGroundService or use JobScheduler/JobIntentService
唯一的选择是启动 ForeGroundService 或使用 JobScheduler/JobIntentService
You can start foreground service as follows:
您可以按如下方式启动前台服务：
@Override
public void onReceive(Context context, Intent intent) {
// Explicitly specify that GCMIntentService will handle the intent.
ComponentName comp = new ComponentName(context.getPackageName(), GCMIntentService.class.getName());
// Start the service, keeping the device awake while it is launching.
ContextCompat.startForegroundService(context,intent.setComponent(comp));
...
}
You also need to call startService()from your Service class and display notification. You can follow my answer on this SOfor implementation details.
您还需要startService()从您的服务类调用并显示通知。您可以按照我在此SO上的回答了解实现细节。
