GPS/ネットワーク プロバイダーの位置情報に行き詰まっています。すべてのアンドロイドユーザーにとって基本的な質問であることは知っていますが、私は長い間この問題を抱えています。
実際には、 Option Menuをクリックして次の方法で現在の場所を取得し、データベースに挿入しています。
/****
* GPS Process First of all call listener of Location then checking for GPS_PROVIDER if not
* available then check for NETWORK_PROVIDER and if its also not available then pass
* 0.00,0.00 to longitude and latitude
*/
/** PROCESS for Get Longitude and Latitude **/
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Define a listener that responds to location updates
locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
longitude = String.valueOf(location.getLongitude());
latitude = String.valueOf(location.getLatitude());
Log.d(TAG, "changed Loc : " + longitude + ":" + latitude);
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
public void onProviderEnabled(String provider) {
}
public void onProviderDisabled(String provider) {
}
};
// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// check if GPS enabled
if (isGPSEnabled) {
int i;
for (i = 0; i < 3; i++) {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
locationListener);
Location location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
longitude = String.valueOf(location.getLongitude());
latitude = String.valueOf(location.getLatitude());
break;
} else {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
longitude = String.valueOf(location.getLongitude());
latitude = String.valueOf(location.getLatitude());
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0,
0, locationListener);
break;
} else {
longitude = "0.00";
latitude = "0.00";
}
}
}
/**
* Record Inserting Process in Database...
**/
} else {
AlertDialogManager.showAlertforSettings(AccountMenuActivity.this, "GPS Settings",
"GPS is not Enabled. Do you want to Enable?", false);
}
緯度と経度が何度も 0.00になり、他の国 (中国、南アフリカなど) の場所が表示されることもあります。
なぜそれが起こるのかわかりませんが、Stackoverflow Solutionを見つけた後、2日間のグーグル検索でFusedLocationProviderApiという名前のGoogleの新しいAPIが見つかりました。
いくつかのリンクをたどって実装しましたが、次のようなエラーが発生しました。
/**
* Booleans for GPS and NETWORK is Enabled or not...
*/
boolean gpsEnabled = false;
boolean networkEnabled = false;
//exceptions will be thrown if provider is not permitted.
try {
gpsEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch (Exception ex) {
Log.e("TAG", "GPS Error : " + ex.getLocalizedMessage());
}
try {
networkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch (Exception ex) {
Log.e("TAG", "NetWork Error : " + ex.getLocalizedMessage());
}
Log.e("TAG", "GPS Network status : " + gpsEnabled + " : " + networkEnabled);
//don't start listeners if no provider is enabled
if (!gpsEnabled && !networkEnabled) {
AlertDialogManager.showAlertforSettings(VisitAcitivity.this, "GPS Settings", "GPS is not Enabled. Do you want to Enable?", false);
} else {
Log.i(TAG, "isPlayServiceAvailable" + isPlayServiceAvailable);
if(isPlayServiceAvailable) {
createLocationRequest();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
mGoogleApiClient.connect();
} else {
final MyLocation.LocationResult locationResult = new MyLocation.LocationResult() {
@Override
public void gotLocation(final Location location) {
// Got the location!
runOnUiThread(new Runnable() {
@Override
public void run() {
longitude = String.valueOf(location.getLongitude());
latitude = String.valueOf(location.getLatitude());
saveVisit();
}
});
}
};
MyLocation myLocation = new MyLocation();
myLocation.getLocation(VisitAcitivity.this, locationResult);
}
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
if(isPlayServiceAvailable && mGoogleApiClient != null)
stopLocationUpdates();
else if (locationManager != null) {
locationManager.removeUpdates(locationListener);
Log.d("msg", "Location Listener ended...");
}
}
@Override
public void onStop() {
super.onStop();
Log.d(TAG, "onStop fired ..............");
if(mGoogleApiClient != null)
mGoogleApiClient.disconnect();
}
@Override
public void onConnected(Bundle bundle) {
Log.d(TAG, "onConnected - isConnected ...............: " + mGoogleApiClient.isConnected());
startLocationUpdates();
}
protected void startLocationUpdates() {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
Log.d(TAG, "Location update started ..............: ");
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
@Override
public void onLocationChanged(Location location) {
Log.d(TAG, "Firing onLocationChanged..............................................");
mCurrentLocation = location;
Log.d(TAG, "UI update initiated .............");
if (null != mCurrentLocation) {
latitude = String.valueOf(mCurrentLocation.getLatitude());
longitude = String.valueOf(mCurrentLocation.getLongitude());
} else {
Log.d(TAG, "location is null ...............");
}
}
protected void stopLocationUpdates() {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
Log.d(TAG, "Location update stopped .......................");
}
その中で、私は場所を取得する2つの方法を管理しています:
- Google Play Service が利用可能かどうかは、FusedLocation API を使用して場所を取得します。
- それ以外の場合は、独自の方法を使用して位置を取得します (デバイスが非常に多いため)。
My で次の権限を取得しましたAndroidManifest.xml。
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
次に、 NULLの場所も取得します:(この問題の解決策はありますか?
よろしくお願いします。