電話機の現在地を取得していませんか？ [Android]

Question

これまでのところです。現在の位置を緯度と経度として2つの別々のテキストビューに表示することになっています。

私はエミュレータと実際のアンドロイド携帯電話でこれを試してみましたが、どちらでも動作しません。何も起こらず、textviews doestは任意の座標を表示します。エラーもありません。

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

private static final int LOCATION_REQUEST_INTERVAL = 60000; 
private static final int LOCATION_REQUEST_FASTEST = 15000; 
private static final int MY_PERMISSION_REQUEST_READ_COARSE_LOCATION = 102; 
private TextView latitudeTextView; 
private TextView longitudeTextView; 
private ImageButton imageButton; 
private GoogleApiClient googleApiClient; 
private LocationRequest locationRequest; 
private FusedLocationProviderApi fusedLocationProviderApi = LocationServices.FusedLocationApi; 
private double mLatitude; 
private double mLongitude; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    latitudeTextView = (TextView) findViewById(R.id.latitudeTextView); 
    longitudeTextView = (TextView) findViewById(R.id.longitudeTextView); 
    imageButton = (ImageButton) findViewById(R.id.imageButton); 

    googleApiClient = new GoogleApiClient.Builder(this) 
      .addApi(LocationServices.API) 
      .addConnectionCallbacks(this) 
      .addOnConnectionFailedListener(this).build(); 

    locationRequest = new LocationRequest(); 
    locationRequest.setInterval(LOCATION_REQUEST_INTERVAL); 
    locationRequest.setFastestInterval(LOCATION_REQUEST_FASTEST); 
    locationRequest.setPriority(locationRequest.PRIORITY_BALANCED_POWER_ACCURACY); 
} 

@Override 
public void onConnected(@Nullable Bundle bundle) { 
    requestLocationUpdates(); 
} 

private void requestLocationUpdates() { 
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
     ActivityCompat.requestPermissions(this, 
       new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION}, 
       MY_PERMISSION_REQUEST_READ_COARSE_LOCATION); 

     return; 
    } 
    LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, this); 
} 

@Override 
public void onConnectionSuspended(int i) { 

} 

@Override 
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 

} 

@Override 
public void onLocationChanged(Location location) { 
    mLatitude = location.getLatitude(); 
    mLongitude = location.getLongitude(); 
    latitudeTextView.setText(String.valueOf(mLatitude)); 
    longitudeTextView.setText(String.valueOf(mLongitude)); 
} 

@Override 
protected void onStart() { 
    super.onStart(); 
    googleApiClient.connect(); 
} 

@Override 
protected void onStop() { 
    super.onStop(); 
    googleApiClient.disconnect(); 
} 

@Override 
protected void onResume() { 
    super.onResume(); 
    if(googleApiClient.isConnected()) 
     requestLocationUpdates();; 
} 

@Override 
protected void onPause() { 
    super.onPause(); 
    LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient,this); 
} 

}

なぜそれが機能しないのですか？私はいくつかのガイドに従っています。そのうちの1つはアンドロイドの開発者ガイドです。

ご意見やご提案はありますか？

入力いただきありがとうございます。

Answer 1

私の経験ではエミュレータはPRIORITY_BALANCED_POWER_ACCURACYでは動作しませんが、 PRIORITY_HIGH_ACCURACYが必要です。

変更コードの行

locationRequest.setPriority（locationRequest.PRIORITY_BALANCED_POWER_ACCURACY）。

LocationRequest.setPriority（LocationRequest.PRIORITY_HIGH_ACCURACY）に

。

また、アクセス許可の要求ダイアログボックスでは、粗い場所に対してのみ許可が与えられます。私はこれを素晴らしい場所に変更します。コードの行を変更：

新しいString [] {Manifest.permission.ACCESS_COARSE_LOCATION、Manifest.permission.ACCESS_FINE_LOCATION}、 MY_PERMISSION_REQUEST_READ_COARSE_LOCATION）。

に

requestPermissions（新しい 文字列[] {} Manifest.permission.ACCESS_FINE_LOCATION、 MY_PERMISSION_REQUEST_FINE_LOCATION）。

と最後MY_PERMISSION_REQUEST_FINE_LOCATION

の文字列値を定義し、位置権限デバイスまたはエミュレーターに付与されていることを確認してください。 [設定] - > [アプリ]に移動し、アプリが位置情報サービスを使用していることを確認します。そうでない場合は、「アクセス許可」をクリックしてサービスをオンにします。

Answer 2

クラスGpsTracker.javaを作成しますように今、あなたはGpsTracker.javaのインスタンスを作成する場所を取得することができます

import android.app.AlertDialog; 
import android.app.Service; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.location.GpsStatus; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.os.IBinder; 
import android.provider.Settings; 
import android.util.Log; 

public class GPSTracker extends Service implements LocationListener { 

    private final Context mContext; 

    // flag for GPS status 
    boolean isGPSEnabled = false; 

    // flag for network status 
    boolean isNetworkEnabled = false; 

    // flag for GPS status 
    boolean canGetLocation = false; 

    Location location; // location 
    double latitude; // latitude 
    double longitude; // longitude 

    // The minimum distance to change Updates in meters 
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1000; // 10 meters 

    // The minimum time between updates in milliseconds 
    private static final long MIN_TIME_BW_UPDATES = 100000 * 60 * 1; // 5 minute 

    // Declaring a Location Manager 
    protected LocationManager locationManager; 

    public GPSTracker(Context context) { 
     this.mContext = context; 
     getLocation(); 
    } 

    public Location getLocation() { 
     try { 
      locationManager = (LocationManager) mContext 
        .getSystemService(LOCATION_SERVICE); 

      // getting GPS status 
      //isGPSEnabled = locationManager 
        //.isProviderEnabled(LocationManager.GPS_PROVIDER); 

      // getting network status 
      isNetworkEnabled = locationManager 
        .isProviderEnabled(LocationManager.NETWORK_PROVIDER); 





      if (!isGPSEnabled && !isNetworkEnabled) { 
       // no network provider is enabled 
       //showSettingsAlert(); 

      } else { 
       this.canGetLocation = true; 
       if (isNetworkEnabled) { 
        locationManager.requestLocationUpdates(
          LocationManager.NETWORK_PROVIDER, 
          MIN_TIME_BW_UPDATES, 
          MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
        Log.d("Network", "Network"); 
        if (locationManager != null) { 
         location = locationManager 
           .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 

         if (location != null) { 
          latitude = location.getLatitude(); 
          longitude = location.getLongitude(); 
         } 
        } 
       } 
       // if GPS Enabled get lat/long using GPS Services 
       else { 
        if(isGPSEnabled) { 

        if (location == null) { 
         locationManager.requestLocationUpdates(
           LocationManager.GPS_PROVIDER, 
           MIN_TIME_BW_UPDATES, 
           MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
         Log.d("GPS Enabled", "GPS Enabled"); 
         if (locationManager != null) { 
          location = locationManager 
            .getLastKnownLocation(LocationManager.GPS_PROVIDER); 
          if (location != null) { 
           latitude = location.getLatitude(); 
           longitude = location.getLongitude(); 
          } 
         } 
        } 
        } 
       } 
      } 

     } catch (Exception e) { 
      e.printStackTrace(); 
     } 

     return location; 
    } 

    /** 
    * Stop using GPS listener 
    * Calling this function will stop using GPS in your app 
    * */ 
    public void stopUsingGPS(){ 
     if(locationManager != null){ 
      locationManager.removeUpdates(GPSTracker.this); 
     }  
    } 

    /** 
    * Function to get latitude 
    * */ 
    public double getLatitude(){ 
     if(location != null){ 
      latitude = location.getLatitude(); 
     } 

     // return latitude 
     return latitude; 
    } 

    /** 
    * Function to get longitude 
    * */ 
    public double getLongitude(){ 
     if(location != null){ 
      longitude = location.getLongitude(); 
     } 

     // return longitude 
     return longitude; 
    } 





    /** 
    * Function to check GPS/wifi enabled 
    * @return boolean 
    * */ 
    public boolean canGetLocation() { 
     return this.canGetLocation; 
    } 

    /** 
    * Function to show settings alert dialog 
    * On pressing Settings button will lauch Settings Options 
    * */ 
    public void showSettingsAlert(){ 
     AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); 

     // Setting Dialog Title 
     alertDialog.setTitle("GPS is settings"); 

     // Setting Dialog Message 
     alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?"); 

     // On pressing Settings button 
     alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() { 
      public void onClick(DialogInterface dialog,int which) { 
       Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
       mContext.startActivity(intent); 
      } 
     }); 

     // on pressing cancel button 
     alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
      public void onClick(DialogInterface dialog, int which) { 
      dialog.cancel(); 
      System.exit(0); 

      } 
     }); 

     // Showing Alert Message 
     alertDialog.show(); 
    } 

    @Override 
    public void onLocationChanged(Location location) { 
    } 

    @Override 
    public void onProviderDisabled(String provider) { 
    } 

    @Override 
    public void onProviderEnabled(String provider) { 
    } 

    @Override 
    public void onStatusChanged(String provider, int status, Bundle extras) { 
    } 

    @Override 
    public IBinder onBind(Intent arg0) { 
     return null; 
    } 

} 

：

GPSTracker gpstracker=new GPSTracker(EditProfile.this); 
double lat=gpstracker.getLatitude(); 
double longitude=gpstracker.getLongitude();