Android Studio Google Maps 可在 Android 设备上运行，但不能在模拟器上运行

Posted 2023-04-18

【中文标题】Android Studio Google Maps 可在 Android 设备上运行，但不能在模拟器上运行

【英文标题】：Android Studio Google Maps Working on Android Device but not on Emulator

【发布时间】：2021-08-07 01:03:33

【问题描述】：

我正在尝试使用从 Google Cloud 平台获得的 Google Maps API 密钥来获取我在 android Studio 中的当前位置。 如果我在手机上运行该应用程序，一切正常。 如果我在模拟器上运行应用程序，我的位置似乎是 Google Plex，如下图所示（这将是完全错误的）： emulator app showing the wrong location

我不确定这是因为 API 密钥还是代码/权限/GPS 中的错误？ 我从教程中获取了代码，但现在似乎不推荐使用 Google 客户端（不确定这是否是问题所在）。 我相信是因为模拟器，但我不知道为什么。我目前使用的是 Pixel 2 API 26。

我将在这里显示代码：

  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="com.google.android.providers.gsf.permisson.READ_GSERVICES"/>
<meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="@string/google_maps_key" />

BUILD.GRADLE：

implementation 'com.google.android.gms:play-services-maps:17.0.1'
implementation 'com.google.android.gms:play-services-location:18.0.0'

地图活动：

public class GoogleMapsActivity extends FragmentActivity implements OnMapReadyCallback,
    GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener,
    LocationListener 

private GoogleMap mMap;
private GoogleApiClient googleClient;
private LocationRequest locationRequest;
private Location ultimateLocation;
private Marker markerCurrentLocation;
private static final int Request_User_Location_Code = 90;


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

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
    
        checkLocationPermission();
    

    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    assert mapFragment != null;
    mapFragment.getMapAsync(this);



@Override
public void onMapReady(@NotNull GoogleMap googleMap) 
    mMap = googleMap;
    //current location
    if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
        createGoogleApiClient();
        mMap.setMyLocationEnabled(true);
    




protected synchronized void createGoogleApiClient()  // ok
    googleClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
    googleClient.connect();



@Override
public void onLocationChanged(@NonNull Location location)  // ok
    ultimateLocation = location;
    if (markerCurrentLocation !=null)
    
        markerCurrentLocation.remove();;
    
    LatLng coordinates = new LatLng(location.getLatitude(), location.getLongitude());
    MarkerOptions markerOptions = new MarkerOptions();
    markerOptions.position(coordinates);
    markerOptions.title("Current Location");
    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE));

    markerCurrentLocation = mMap.addMarker(markerOptions);
    mMap.moveCamera(CameraUpdateFactory.newLatLng(coordinates));
    mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), 17.0f));

    if(googleClient!=null)
    
        LocationServices.FusedLocationApi.removeLocationUpdates(googleClient,this);
    
    else
    
        Toast.makeText(this, "NULLLLLLLL", Toast.LENGTH_SHORT).show();
    




@Override
public void onConnected(@Nullable Bundle bundle)  // ok
    locationRequest = new LocationRequest();
    locationRequest.setInterval(1100);
    locationRequest.setFastestInterval(1100);
    locationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);

    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) 
        LocationServices.FusedLocationApi.requestLocationUpdates(googleClient, locationRequest, this);
    


public boolean checkLocationPermission() // ok
    boolean ret;
    if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
        if(ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.ACCESS_FINE_LOCATION))
        
            ActivityCompat.requestPermissions(this, new String[]Manifest.permission.ACCESS_FINE_LOCATION, Request_User_Location_Code);
        
        else
        
            ActivityCompat.requestPermissions(this, new String[]Manifest.permission.ACCESS_FINE_LOCATION, Request_User_Location_Code);

        
        ret = false;
    
    else
    
        ret = true;
    
    return ret;

//ok
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) 
    switch (requestCode)
    
        case Request_User_Location_Code:
            if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
            
                if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)== PackageManager.PERMISSION_GRANTED)
                
                    if(googleClient==null)
                    
                        createGoogleApiClient();;
                    
                    mMap.setMyLocationEnabled(true);
                
            
            else
            
                Toast.makeText(this, " PERMISSION DENIED", Toast.LENGTH_SHORT).show();
            
            return ;
    


@Override
public void onConnectionSuspended(int i) 



@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) 

【参考方案1】：

只需转到模拟器控件（三点菜单）并在Location 选项卡中，固定地图中的任意位置，然后单击Set Location。

然后验证您是否在应用中收到了预期的位置。

【讨论】：

我正在尝试通过实时更新获取我的当前位置。我有一个代码，它适用于 android 设备，但不适用于模拟器，我的问题是它是否是模拟器的问题。可能模拟器没有GPS功能什么的？

模拟器没有 GPS 硬件，但是它具有所有的 API 和功能，并且会返回您想要的任何位置。虽然它不会返回您当前的位置，但您可以通过设置设置位置，然后在您的应用中验证它们。