Comme les questions de quelqu'un rencontré avant J'ai testé le nexus s(4.0.4 avec google play services) et avd (4.2.2 avec l'api de google), dans les deux cas locationclient de getLastLocation() retourne toujours null.
public class MainActivity extends Activity implements LocationListener,
GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener {
private LocationClient mLocationClient;
private LocationRequest mLocationRequest;
boolean mUpdatesRequested = false;
boolean mConnected = false;
SharedPreferences mPrefs;
SharedPreferences.Editor mEditor;
private TextView mText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mText = (TextView) findViewById(R.id.text);
mLocationRequest = LocationRequest.create();
mLocationRequest
.setInterval(LocationUtils.UPDATE_INTERVAL_IN_MILLISECONDS);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest
.setFastestInterval(LocationUtils.FAST_INTERVAL_CEILING_IN_MILLISECONDS);
mUpdatesRequested = false;
mPrefs = getSharedPreferences(LocationUtils.SHARED_PREFERENCES,
Context.MODE_PRIVATE);
mEditor = mPrefs.edit();
mLocationClient = new LocationClient(this, this, this);
}
@Override
public void onStart() {
super.onStart();
/*
* Connect the client. Don't re-start any requests here; instead, wait
* for onResume()
*/
mLocationClient.connect();
}
@Override
protected void onResume() {
super.onResume();
// If the app already has a setting for getting location updates, get it
if (mPrefs.contains(LocationUtils.KEY_UPDATES_REQUESTED)) {
mUpdatesRequested = mPrefs.getBoolean(
LocationUtils.KEY_UPDATES_REQUESTED, false);
// Otherwise, turn off location updates until requested
} else {
mEditor.putBoolean(LocationUtils.KEY_UPDATES_REQUESTED, false);
mEditor.commit();
}
}
@Override
public void onStop() {
// If the client is connected
if (mLocationClient.isConnected()) {
stopPeriodicUpdates();
}
// After disconnect() is called, the client is considered "dead".
mLocationClient.disconnect();
super.onStop();
}
@Override
public void onPause() {
// Save the current setting for updates
mEditor.putBoolean(LocationUtils.KEY_UPDATES_REQUESTED,
mUpdatesRequested);
mEditor.commit();
super.onPause();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void getLocation(View v) {
// If Google Play Services is available
if (isGooglePlayServicesAvailable()) {
if (!mConnected)
mText.setText("location client is not connected to service yet");
else {
// Get the current location
Location currentLocation = mLocationClient.getLastLocation();
// Display the current location in the UI
mText.setText(LocationUtils.getLocationString(currentLocation));
}
}
}
private boolean isGooglePlayServicesAvailable() {
// Check that Google Play services is available
int resultCode = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(this);
// If Google Play services is available
if (ConnectionResult.SUCCESS == resultCode) {
// In debug mode, log the status
Log.d(LocationUtils.APPTAG, "google play service is available");
// Continue
return true;
// Google Play services was not available for some reason
} else {
// Display an error dialog
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(resultCode,
this, 0);
if (dialog != null) {
Log.e(LocationUtils.APPTAG,
"google play service is unavailable");
}
return false;
}
}
private void stopPeriodicUpdates() {
mLocationClient.removeLocationUpdates(this);
// mConnectionState.setText(R.string.location_updates_stopped);
}
@Override
public void onConnectionFailed(ConnectionResult arg0) {
mConnected = false;
Log.d(LocationUtils.APPTAG, "connection failed");
}
@Override
public void onConnected(Bundle arg0) {
mConnected = true;
Log.d(LocationUtils.APPTAG,
"location client connected to the location server");
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
lm.requestLocationUpdates(LocationManager.PASSIVE_PROVIDER, 0, 0,
new android.location.LocationListener() {
@Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onLocationChanged(final Location location) {
}
});
Log.d(LocationUtils.APPTAG, "done trying to get location");
}
@Override
public void onDisconnected() {
// TODO Auto-generated method stub
mConnected = false;
Log.d(LocationUtils.APPTAG,
"location client disconnected from the location server");
}
@Override
public void onLocationChanged(Location arg0) {
// TODO Auto-generated method stub
}
}
la plupart d'entre eux sont venus à partir des exemples donnés par google. Dans le code ci-dessus hava essayé la méthode comme ça:
LocationRequest request = LocationRequest.create();
request.setNumUpdates(1);
mLocationClient.requestLocationUpdates(request, this);
et
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
lm.requestLocationUpdates(LocationManager.PASSIVE_PROVIDER, 0, 0,
new android.location.LocationListener() {
@Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onLocationChanged(final Location location) {
}
});
Dans onConnected() avant d'appeler getLastLocation(), mais pas de chance. Où est l'erreur, Merci d'avance.
