【发布时间】：2017-01-24 02:06:34
【问题描述】：
我需要每 1 分钟和每 5 米位移更新一次融合位置（我知道这是不好的做法，但为了测试和在日志中显示），我通过按钮开始服务 按下按钮后立即按下我得到位置在 logcat 中，但只有一次。根据 Service class，onLocationChanged 应该每 1 分钟调用一次，但即使我的 GPS 几乎每分钟打开一次，然后在一段时间后关闭但仍然没有位置，它也不会再调用一次在 Logcat 中更新。我需要服务类来保持更新位置而不影响 UI 或主线程
这里是 logcat，它只显示一次位置更新
09-16 03:13:37.125 10419-10419/com.example.com.pro_working1 D/===Location Service===: Service onConnected Calling
09-16 03:13:37.125 10419-10419/com.example.com.pro_working1 D/===Location Service===: Start Location Update is Calling
09-16 03:13:38.315 10419-10419/com.example.com.pro_working1 D/===Location Service===: Service OnLocationChanged Calling
09-16 03:13:38.315 10419-10419/com.example.com.pro_working1 D/===Location Service===: Here is Updated Locations: Latitude 28.5XXXXX Longitude 77.2XXXXX
09-16 03:13:38.315 10419-10419/com.example.com.pro_working1 D/===Location Service===: Sending Location Starting Accuracy is: 37.5
这是我的服务类
public class Location_Service_background extends Service implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
public static final String TAG = "===Location Service===";
GoogleApiClient apiClient;
Location mCurrentLocation;
LocationRequest locationRequest;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
GoogleApiSetup();
RequestLocationUpdates();
Log.d(TAG,"OnStartCommand Is Calling ");
return START_STICKY;
}
@Override
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented");
}
@Override
public void onCreate() {
super.onCreate();
}
@Override
public void onDestroy() {
super.onDestroy();
if (apiClient.isConnected()){
Log.d(TAG,"Service On Destroy Calling and apiClient is Connected");
StopLocationUpdates();
apiClient.disconnect();
}
}
@Override
public void onLowMemory() {
super.onLowMemory();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
Log.d(TAG,"Service onConnected Calling");
if (mCurrentLocation != null) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(apiClient);
}
else {
Log.d(TAG,"Start Location Update is Calling");
StartLocationUpdate();
}
}
@Override
public void onConnectionSuspended(int i) {
Log.d(TAG,"Service OnConnectionSuspended Calling");
apiClient.connect();
}
@Override
public void onLocationChanged(Location location) {
Log.d(TAG,"Service OnLocationChanged Calling");
mCurrentLocation=location;
Log.d(TAG,"Here is Updated Locations: Latitude "+mCurrentLocation.getLatitude()+"Longitude "+mCurrentLocation.getLongitude());
String Latitude= String.valueOf(mCurrentLocation.getLatitude());
String Longitude=String.valueOf(mCurrentLocation.getLongitude());
String Accuracy=String.valueOf(mCurrentLocation.getAccuracy());
Log.d(TAG,"Sending Location Starting"+" "+" Accuracy is: "+mCurrentLocation.getAccuracy());
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Log.d(TAG,"Connection Failed Called "+connectionResult);
}
private synchronized void GoogleApiSetup() {
apiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
apiClient.connect();
}
private void RequestLocationUpdates() {
locationRequest = new LocationRequest();
//1 Min = 60 seconds AND 1000 milliseconds in 1 second
locationRequest.setInterval(60 * 1000);//5 Min 300 x 1000=300000
locationRequest.setFastestInterval(60 * 1000);//2 Min
locationRequest.setSmallestDisplacement(5);
locationRequest.setMaxWaitTime(60*1000);
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
private void StopLocationUpdates() {
LocationServices.FusedLocationApi.removeLocationUpdates(apiClient, this);
}
private void StartLocationUpdate() {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
if (apiClient.isConnected()) {
LocationServices.FusedLocationApi.requestLocationUpdates(apiClient, locationRequest, this);
}
else {
Log.d(TAG,"GoogleApiClient is not connected yet.Please Try Again");
apiClient.connect();
}
}
}
【问题讨论】：
-
不使用 setsmallestdisplacement 试试看会发生什么
-
它显示了在没有
setsmallestdisplacement的情况下对onLocationUpdate的调用，但是我如何使用带有setsmallestdisplacement 的定期更新。感谢您的帮助
标签： java android service location android-fusedlocation