android - Android アプリで 1 つの携帯電話の GPS 位置情報を取得するにはどうすればよいですか?

Question

1台の携帯電話で位置を取得し、その携帯電話の位置を表示する方法を知りたいです。

uber cab アプリケーションと同じように。ある場所から別の場所への配車をお願いするとき。彼らは私たちのために1つのタクシーを割り当てますその間、アプリにはタクシーの運転手の場所も表示されます。誰かが私たちを案内したり、これに関連するドキュメントを提供したりする場合、彼らがどのように実装するかを知りたい. よろしくお願いします。

Answer 1

次のコードを試してください。

public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener{

    GoogleApiClient googleApiClient;
    int REQUEST_CHECK_SETTINGS = 1;
    Location mLastLocation;
    LocationRequest locationRequest;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        checkForGPS();
    }

    public void checkForGPS(){
        if (googleApiClient == null) {
            googleApiClient = new GoogleApiClient.Builder(this)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this).build();
            googleApiClient.connect();

            if(!((LocationManager)getSystemService(Context.LOCATION_SERVICE)).isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                //prompt user to enable gps
                locationRequest = LocationRequest.create();
                locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
                locationRequest.setInterval(5000);
                locationRequest.setFastestInterval(3000);
                LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
                    .addLocationRequest(locationRequest);
                builder.setAlwaysShow(true);

                PendingResult<LocationSettingsResult> result =
                    LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());

                result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
                    @Override
                    public void onResult(LocationSettingsResult result) {
                        final Status status = result.getStatus();
                        final LocationSettingsStates states = result.getLocationSettingsStates();
                        switch (status.getStatusCode()) {
                            case LocationSettingsStatusCodes.SUCCESS:
                                // All location settings are satisfied. The client can initialize location
                                // requests here.
                                break;
                            case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                                // Location settings are not satisfied. But could be fixed by showing the user
                                // a dialog.
                                try {
                                    // Show the dialog by calling startResolutionForResult(),
                                    // and check the result in onActivityResult().
                                    status.startResolutionForResult(
                                            MainActivity.this,
                                            REQUEST_CHECK_SETTINGS);
                                } catch (IntentSender.SendIntentException e)     {
                                    // Ignore the error.
                                }
                                break;
                            case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                                // Location settings are not satisfied. However, we have no way to fix the
                                // settings so we won't show the dialog.
                                break;
                        }
                    }
                });
            }
        }
    }

    @Override
    public void onConnected(Bundle bundle) {
        startLocationUpdates();
        mLastLocation = LocationServices.FusedLocationApi.getLastLocation(googleApiClient);
    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {

    }

    @Override
    public void onLocationChanged(Location location) {
        mLastLocation = location;
        // put your code here to play with Location object
    }

    protected void stopLocationUpdates() {
        LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient, this);
    }

    protected void startLocationUpdates() {
        LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, this);
    }
}

必要になる可能性のある便利なインポートを次に示します。

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.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.location.LocationSettingsRequest;
import com.google.android.gms.location.LocationSettingsResult;
import com.google.android.gms.location.LocationSettingsStates;
import com.google.android.gms.location.LocationSettingsStatusCodes;

マニフェストでこれらのアクセス許可を宣言することを忘れないでください。

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />