下面的代码在奥利奥之前的版本上没有任何问题。
尽管我使用startForeground方法并explicit有意获取 Activity 值，onHandleIntent但从未调用方法。
我找不到有关此问题的任何问题或解决方案。
有没有机会克服这个问题？
注意：我在运行自定义 ROM 的手机上进行了尝试，但我无法在 Android Emulator 上模拟这种情况。
AndroidManifest.xml文件
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.myservice"
android:versionCode="1"
android:versionName="1.0">
<application ... >
<service android:name="com.MyService">
<intent-filter>
<action android:name="com.MyService"/>
</intent-filter>
</service>
<uses-permission android:name="com.google.android.gms.permission.ACTIVITY_RECOGNITION" />
<service android:name="com.myservice.ActivityHelper$ActivityRecognitionService" />
</application>
</manifest>
MyService.java文件
public class MyService extends Service {
...
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
runServiceAtForeground();
return START_STICKY;
}
private void runServiceAtForeground () {
...
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
...
mNotificationManager.createNotificationChannel(channel);
}
Intent i = new Intent(getApplicationContext(), MyService.class);
PendingIntent pi = PendingIntent.getActivity(this, 0, i, 0);
NotificationCompat.Builder notif = new NotificationCompat.Builder(this, channel_id);
notif.setContentIntent(pi);
// MAKING FOREGROUND SERVICE
startForeground(notif_id, notif.build());
// STARTING ACTIVITY RECOGNITION
mActivityHelper.startObserving();
}
...
}
ActivityHelper.java文件
public class ActivityHelper {
...
public void startObserving() {
ActivityRecognitionClient arc = ActivityRecognition.getClient(context);
Task<Void> task = arc.requestActivityUpdates(20000, getActivityDetectionPendingIntent());
task.addOnSuccessListener(new OnSuccessListener<Void>() {...});
task.addOnFailureListener(new OnFailureListener() {...});
}
private PendingIntent getActivityDetectionPendingIntent() {
Intent i = new Intent(mContext, ActivityRecognitionService.class);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
return PendingIntent.getBroadcast(mContext, 0, i, PendingIntent.FLAG_UPDATE_CURRENT);
} else {
return PendingIntent.getService(mContext, 0, i, PendingIntent.FLAG_UPDATE_CURRENT);
}
}
public static class ActivityRecognitionService extends IntentService {
public ActivityRecognitionService() {
super("ActivityRecognitionService");
}
@Override
public void onCreate() {
super.onCreate();
}
@Override
protected void onHandleIntent(Intent intent) {
// THIS METHOD IS NEVER RUN ON OREO
if (ActivityRecognitionResult.hasResult(intent)) {
ActivityRecognitionResult result = ActivityRecognitionResult.extractResult(intent);
if (listener != null) {
Log.v(TAG, result.getMostProbableActivity().getType());
}
stopSelf();
}
}
}
}