我正在开发一个应用程序,它将从后台服务连续发送位置更新。我尝试了以下代码。
public class LocationService extends Service implements LocationListener,
GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener {
LocationRequest mLocationRequest;
LocationClient mLocationClient;
@Override
public void onCreate() {
//creating log file in mobile
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Service created:", com.example.locationservice.Constants.LOG_FILE);
mLocationRequest = LocationRequest.create();
mLocationRequest.setInterval(5*1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
// mLocationRequest.setFastestInterval(5*1000);
mLocationClient = new LocationClient(getApplicationContext(), this,this);
mLocationClient.connect();
}
@Override
public void onStart(Intent intent, int startId) {
int start = Service.START_STICKY;
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Service Started:", com.example.locationservice.Constants.LOG_FILE);
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
// TODO Auto-generated method stub
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Connection to client failed", com.example.locationservice.Constants.LOG_FILE);
this.stopSelf();
}
@Override
public void onConnected(Bundle arg0) {
// TODO Auto-generated method stub
Log.i("info", "Location Client is Connected");
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Location Client Connectd:", com.example.locationservice.Constants.LOG_FILE);
//checking for locaton enabled or not
if(Util.isLocationEnabled(getApplicationContext())){
//checking for internet available or not
if(Util.isInternetOn(getApplicationContext())){
mLocationClient.requestLocationUpdates(mLocationRequest, this);
}else{
Log.i("info", "Internet not available");
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Internet not available", com.example.locationservice.Constants.LOG_FILE);
this.stopSelf();
}
}else{
Log.i("info", "Location Acess disabled");
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Location Acess disabled", com.example.locationservice.Constants.LOG_FILE);
this.stopSelf();
}
Log.i("info", "Service Connect status :: " + isServicesConnected());
}
@Override
public void onDisconnected() {
// TODO Auto-generated method stub
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Location Client DisConnectd:", com.example.locationservice.Constants.LOG_FILE);
Log.i("info", "Location Client is DisConnected");
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
double latitude = location.getLatitude();
double longitude = location.getLongitude();
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Location Changed:", com.example.locationservice.Constants.LOG_FILE);
Log.i("info", "Latitude :: " + latitude);
Log.i("info", "Longitude :: " + longitude);
if(Util.isInternetOn(getApplicationContext())){
//sending location details
sendLocation(location);
}else{
this.stopSelf();
Log.i("info", "Internet not available");
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Internet not available", com.example.locationservice.Constants.LOG_FILE);
}
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
Log.i("info", "Service is destroyed");
mLocationClient.removeLocationUpdates(this);
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Service Destroyed:", com.example.locationservice.Constants.LOG_FILE);
super.onDestroy();
}
private boolean isServicesConnected() {
// Check that Google Play services is available
int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(LocationService.this);
// If Google Play services is available
if (ConnectionResult.SUCCESS == resultCode) {
return true;
} else {
return false;
}
}
}
但onLocationChanged
仅在我打开内置地图应用程序时调用。另外,它不会更新位置详细信息。
我从使用警报服务的活动开始这项服务。每分钟alarmManager
触发一次。任何人都可以告诉我为什么onLocationChanged没有连续打电话。
提前致谢。
答案 0 :(得分:3)
试试这个:
@Override
public void onCreate() {
//creating log file in mobile
appendLog(DateFormat.getDateTimeInstance().format(new Date()) + ": Service created:", com.example.locationservice.Constants.LOG_FILE);
mLocationClient = new LocationClient(getApplicationContext(), this,this);
}
将onStart替换为:
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
mLocationClient.connect();
}
和
@Override
public void onConnected(Bundle arg0) {
mLocationRequest = LocationRequest.create();
mLocationRequest.setInterval(5*1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationClient.requestLocationUpdates(mLocationRequest, this);
}
调用您的服务:
startService(yourServiceIntent);
您还可以查看我的代码here
答案 1 :(得分:0)
它在后台工作正常吗?在后台运行45分钟后服务不会停止? - Noman 11月3日和15日6:18
这是一个很好的评论。在我的项目中,我有一些proglem在位置更新中持续不断。它在45分钟后真的停止了。
我的服务是前台。我用
StartForeground(ServicesId.Push,notification);
我每45分钟唤醒位置更新
_timer = new Timer(); _timer.Schedule(新的TimerTaskTrek(this),45 * 60 * 1000 + 10 * 1000,45 * 60 * 1000 + 10 * 1000);
并在timerTask中
试 {
Looper.Prepare();
} catch(例外e) {
}
_client = new> GoogleApiClient.Builder(this).AddApi(LocationServices.API) .AddConnectionCallbacks(本) .AddOnConnectionFailedListener(本) .Build();
_client.Connect();
它非常简单,而且工作非常好。 享受