[英]Continuous location updates in background
我正在開發一個應用程序,它將從后台服務連續發送位置更新。 我試過以下代碼。
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
僅在我打開內置地圖應用程序時調用。 另外,它不會更新位置詳細信息。 我從使用警報服務的活動開始這項服務。 alarmManager
每隔一分鍾觸發一次。 任何人都可以告訴我為什么onLocationChanged不會連續調用。
提前致謝。
試試這個:
@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);
}
將onStart替換為:
@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);
}
調用您的服務:
startService(yourServiceIntent);
你也可以在這里查看我的代碼
它在后台工作正常嗎? 在后台運行45分鍾后服務不會停止? - Noman 2015年11月3日6:18
這是一個很好的評論。 在我的項目中,我有一些proglem在位置更新中持續不斷。 45分鍾后它真的停了下來。
我的服務是前台。 我用
StartForeground(ServicesId.Push,notification);
我每隔45分鍾就會喚醒位置更新
_timer = new Timer(); _timer.Schedule(新的TimerTaskTrek(this),45 * 60 * 1000 + 10 * 1000,45 * 60 * 1000 + 10 * 1000);
並在timerTask中
嘗試{
Looper.Prepare();
} catch(例外e){
}
_client = new> GoogleApiClient.Builder(this).AddApi(LocationServices.API).AddConnectionCallbacks(this).AddOnConnectionFailedListener(this).Build();
_client.Connect();
它非常簡單,而且工作非常好。 請享用
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