【发布时间】：2021-02-09 08:50:46
【问题描述】：
我有一个位置服务，可以在 Firestore 中添加/更新数据。打开应用程序时它工作正常，但如果我强制关闭应用程序或切换到另一个应用程序，该服务将不再工作。我在 Realme 3 pro 设备上对此进行了测试。
- 即使在应用管理器中关闭应用，也可以运行服务。
服务类
public class LocationService extends Service {
private static final String TAG = "SERVICE";
private LocationManager mLocationManager = null;
private static final int LOCATION_INTERVAL = 0;
private static final float LOCATION_DISTANCE = 0;
private class LocationListener implements android.location.LocationListener {
Location mLastLocation;
public LocationListener(String provider) {
Log.e(TAG, "LocationListener " + provider);
mLastLocation = new Location(provider);
}
@Override
public void onLocationChanged(Location location) {
mLastLocation.set(location);
}
@Override
public void onProviderDisabled(String provider) {
Log.e(TAG, "onProviderDisabled: " + provider);
}
@Override
public void onProviderEnabled(String provider) {
Log.e(TAG, "onProviderEnabled: " + provider);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.e(TAG, "onStatusChanged: " + provider);
}
}
LocationListener[] mLocationListeners = new LocationListener[]{
new LocationListener(LocationManager.GPS_PROVIDER),
new LocationListener(LocationManager.NETWORK_PROVIDER)
};
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.e(TAG, "onStartCommand");
super.onStartCommand(intent, flags, startId);
LocationInitialize();
return START_STICKY;
}
@Override
public void onCreate() {
Log.e(TAG, "onCreate");
}
public void LocationInitialize(){
initializeLocationManager();
try {
mLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[1]);
} catch (java.lang.SecurityException ex) {
Log.i(TAG, "fail to request location update, ignore", ex);
} catch (IllegalArgumentException ex) {
Log.d(TAG, "network provider does not exist, " + ex.getMessage());
}
try {
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[0]);
} catch (java.lang.SecurityException ex) {
Log.i(TAG, "fail to request location update, ignore", ex);
} catch (IllegalArgumentException ex) {
Log.d(TAG, "gps provider does not exist " + ex.getMessage());
}
}
@Override
public void onDestroy() {
Log.e(TAG, "onDestroy");
super.onDestroy();
Intent broadcastIntent = new Intent();
broadcastIntent.setAction("restartservice");
broadcastIntent.setClass(this, RestartService.class);
this.sendBroadcast(broadcastIntent);
}
private void initializeLocationManager() {
Log.e(TAG, "initializeLocationManager");
if (mLocationManager == null) {
mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
}
}
@Override
public void onTaskRemoved( Intent rootIntent ) {
Intent broadcastIntent = new Intent();
broadcastIntent.setAction("restartservice");
broadcastIntent.setClass(this, RestartService.class);
this.sendBroadcast(broadcastIntent);
}
}
广播接收
public class RestartService extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
context.startForegroundService(new Intent(context, LocationService.class));
} else {
context.startService(new Intent(context, LocationService.class));
}
}
}
Android 清单
<receiver
android:name=".service.RestartService"
android:enabled="true"
android:stopWithTask="false"
android:exported="true">
<intent-filter>
<action android:name="restartservice" />
</intent-filter>
</receiver>
<service
android:name=".service.LocationService"
android:enabled="true"
android:exported="true" />
【问题讨论】：
-
自从后台限制应用于android以来已经很长时间了。服务不能无限在后台运行。您需要为此使用前台服务。另请阅读Background Location Limits。
-
最好你可以去工作经理
标签： android android-service locationmanager android-gps