我正在使用Google Play服务启动位置服务，但无法正常工作。它不适用于棉花糖和更高版本。权限没有问题，也没有错误，但是没有传递位置更新。
任何帮助将不胜感激。
这是我的服务等级文件：
package com.Myapp.services;
import android.Manifest;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationCallback;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationResult;
import com.google.android.gms.location.LocationServices;
import android.Manifest;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import com.google.android.gms.location.LocationRequest;
import com.Loadmandi.Activities.DashboardActivity;
import com.Loadmandi.Api.LocationApi;
import java.util.Timer;
import java.util.TimerTask;
public class LocationService extends Service implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
String TAG = "ConnectionService";
FusedLocationProviderClient mFusedLocationClient;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
private Location previousLocation;
public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 30000;
public static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS =
UPDATE_INTERVAL_IN_MILLISECONDS / 2;
private Location mLastLocation;
private Context context;
@Override
public IBinder onBind(Intent intent) {
Log.i(TAG, "onBind");
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
context = getApplicationContext();
Log.i(TAG, "onStartCommand");
if (checkPermsion(context)) {
setupLocationService(context);
}
return Service.START_STICKY;
}
@Override
public void onCreate() {
super.onCreate();
// ApplicationCLass.isServiceRunning = true;
}
@Override
public boolean onUnbind(Intent intent) {
Log.i(TAG, "onUnbind");
// ApplicationCLass.isServiceRunning = false;
return super.onUnbind(intent);
}
@Override
public void onDestroy() {
// ApplicationCLass.isServiceRunning = false;
LocationApi.stopLocation(getApplicationContext());
super.onDestroy();
stopLocationUpdates();
}
private void setupLocationService(Context context) {
mGoogleApiClient = new GoogleApiClient.Builder(context)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
createLocationRequest();
}
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
mGoogleApiClient.connect();
}
public boolean checkPermsion(Context context) {
int MyVersion = Build.VERSION.SDK_INT;
if (MyVersion > Build.VERSION_CODES.LOLLIPOP_MR1) {
if (ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return false;
} else if (ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return false;
} else {
return true;
}
} else {
return true;
}
}
private void startLocationUpdates() {
if (mGoogleApiClient.isConnected()) {
Log.w(TAG, "in startLocationUpdates");
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
FusedLocationProviderClient mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
mFusedLocationClient.requestLocationUpdates(mLocationRequest,mLocationCallback,null);
}
}
@Override
public void onConnected(@Nullable Bundle bundle) {
Log.w(TAG, "Connected to onConnected");
startLocationUpdates();
}
@Override
public void onConnectionSuspended(int i) {
Log.w(TAG, "Connected to onConnectionSuspended");
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Log.w(TAG, "Connected to onConnectionFailed");
}
LocationCallback mLocationCallback = new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
if (locationResult == null) {
Log.w(TAG, "165 location is null");
return;
}else{
Log.w(TAG, "167 location is not null");
}
for (Location location : locationResult.getLocations()) {
// Update UI with location data
LocationApi.sendGpsLocation(getApplicationContext(),location.getLongitude(),location.getLatitude());
}
};
};
private void stopLocationUpdates() {
mFusedLocationClient.removeLocationUpdates(mLocationCallback);
}
}
我正在通过以下代码从我的活动开始服务：
Intent i = new Intent(getApplicationContext(), LocationService.class);
startService(i);
答案 0 :(得分：0)
在请求位置更新之前，您的应用必须连接到位置 服务并提出位置请求。 Changing Location Settings的课程 向您展示如何执行此操作。提出位置请求后，您可以 通过调用开始常规更新
requestLocationUpdates()。本课向您展示如何使用
LocationCallback回调方法。呼叫requestLocationUpdates()， 将它传递给您的实例LocationRequest对象和一个LocationCallback。 定义一个startLocationUpdates()方法，如下所示 代码示例：@Override protected void onResume() { super.onResume(); if (mRequestingLocationUpdates) { startLocationUpdates(); } } private void startLocationUpdates() { mFusedLocationClient.requestLocationUpdates(mLocationRequest, mLocationCallback, null /* Looper */); }