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私はアンドロイドの新機能です。私は現在の位置の経度と緯度を取得したいのですが、このコードを使用して緯度と経度を取得しました。 logcatと私はまたgoogle-services.jsonファイルapp /を移動し、mGoogleApiClientとmLastLocationを初期化しました。なぜ私は緯度と経度を見ることができないのですか？何らかのエラーが発生していません。事前にお手伝いください。 ここに誰もがここで現在の場所の緯度と経度をアンドロイドで取得できません
がMapsactivity
のコードで私を助けることができれば私のアプリ https://github.com/akashmalla07/GoogleMap の完全なコードを見てくださいされますpublic class MapsActivity extends FragmentActivity implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
private GoogleMap mMap;
AppLocationService appLocationService;
GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks((GoogleApiClient.ConnectionCallbacks) this)
.addOnConnectionFailedListener((GoogleApiClient.OnConnectionFailedListener) this)
.addApi(LocationServices.API).build();
mLastLocation = LocationServices.FusedLocationApi
.getLastLocation(mGoogleApiClient);
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
if (mMap == null) {
mMap = ((SupportMapFragment)
getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
if (mMap != null) {
displayLocation();
}
}
}
private void displayLocation() {
mLastLocation = LocationServices.FusedLocationApi
.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
double latitude = mLastLocation.getLatitude();
double longitude = mLastLocation.getLongitude();
Log.d("result", latitude + ", " + longitude);
} else {
Log.d("result3","(Couldn't get the location. Make sure location is
enabled on the device)");
}
}
@Override
public void onConnected(Bundle bundle) {
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
}
そして、これらは輸入
import android.location.Location;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
更新されたコードです-------------------------------- -----------
public class MapsActivity extends Activity implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener, LocationListener {
private static final String TAG = MapsActivity.class.getSimpleName();
private LocationRequest mLocationRequest;
private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 1000;
private GoogleMap mMap;
AppLocationService appLocationService;
GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
private TextView lblLocation;
private Button btnShowLocation, btnStartLocationUpdates;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
lblLocation = (TextView) findViewById(R.id.lblLocation);
btnShowLocation = (Button) findViewById(R.id.btnShowLocation);
btnStartLocationUpdates = (Button)
findViewById(R.id.btnLocationUpdates);
if (checkPlayServices()) {
// Building the GoogleApi client
buildGoogleApiClient();
}
btnShowLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
displayLocation();
Log.d("clicked","yes");
}
});
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
}
private boolean checkPlayServices() {
int resultCode = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
GooglePlayServicesUtil.getErrorDialog(resultCode, this,
PLAY_SERVICES_RESOLUTION_REQUEST).show();
} else {
Toast.makeText(getApplicationContext(),
"This device is not supported.", Toast.LENGTH_LONG)
.show();
finish();
}
return false;
}
return true;
}
@Override
protected void onStart() {
super.onStart();
if (mGoogleApiClient != null) {
mGoogleApiClient.connect();
}
}
@Override
protected void onResume() {
super.onResume();
checkPlayServices();
}
@Override
protected void onStop() {
super.onStop();
if (mGoogleApiClient.isConnected()) {
mGoogleApiClient.disconnect();
}
}
@Override
protected void onPause() {
super.onPause();
}
@Override
public void onConnectionFailed(ConnectionResult result) {
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = "
+ result.getErrorCode());
}
@Override
public void onConnected(Bundle arg0) {
displayLocation();
}
private void displayLocation() {
Log.d("after","clicked");
mLastLocation = LocationServices.FusedLocationApi
.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
double latitude = mLastLocation.getLatitude();
double longitude = mLastLocation.getLongitude();
lblLocation.setText(latitude + ", " + longitude);
Log.d("lat",String.valueOf(latitude));
} else {
Log.d("lat","No lat");
lblLocation
.setText("(Couldn't get the location. Make sure location is enabled on the device)");
}
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onLocationChanged(Location location) {
}
}
質問を投稿する前に、疑似質問をしてください。ここを見てください[link]（http://stackoverflow.com/questions/28877835/android-google-maps-v2-current-position-latitude-longitude-nullpointerexception）。もっと似たようなソリューションが見つかるはずです。 –
**あなたのクラスに**輸入**が何であるかを表示することもできますか？または、実際のデバイスで[設定]から[場所]が有効になっていることを確認してください。 –
私のモバイルデバイスの場所にある@jaydroiderが有効になっていて、どこにインポートが表示されるのか質問を編集しました – user3923278