我正在尝试使用Android Studio进行MapActivity。它必须显示用户的位置。
嗯，我知道我需要一个密钥才能使用API，相信我，我至少改变了四次密钥...我还拥有AndroidManifest.xml中的权限。
问题是我可以在没有用户位置的情况下显示地图，但如果我尝试显示他/她的位置，那么应用程序编译得很好但是当我尝试执行它时，它会停止并且我会收到此错误：
11-12 09:13:28.416 21576-21653/raquel.mapapplication W/DynamiteModule: Local module descriptor class for com.google.android.gms.googlecertificates not found.
11-12 09:13:28.424 21576-21653/raquel.mapapplication I/DynamiteModule: Considering local module com.google.android.gms.googlecertificates:0 and remote module com.google.android.gms.googlecertificates:2
11-12 09:13:28.424 21576-21653/raquel.mapapplication I/DynamiteModule: Selected remote version of com.google.android.gms.googlecertificates, version >= 2
11-12 09:13:28.432 21576-21653/raquel.mapapplication W/System: ClassLoader referenced unknown path: /data/user/0/com.google.android.gms/app_chimera/m/0000000b/n/armeabi
11-12 09:13:28.436 21576-21653/raquel.mapapplication D/GoogleCertificates: com.google.android.gms.googlecertificates module is loaded
11-12 09:13:28.504 21576-21653/raquel.mapapplication D/GoogleCertificatesImpl: Fetched 190 Google release certificates
11-12 09:13:28.505 21576-21653/raquel.mapapplication D/GoogleCertificatesImpl: Fetched 363 Google certificates
11-12 09:13:31.235 21576-21576/raquel.mapapplication I/Process: Sending signal. PID: 21576 SIG: 9
它提到了Google Certificates的内容，这就是为什么我认为它可能与密钥有关......但我不确定，我不知道我做错了什么。
感谢您的帮助。
////////
好的，我会尝试发布一些代码......我一直在更改代码，但这是我尝试过的最后一次（我也试过了setMyLocationEnable（true），因为不推荐使用getMyLocation（），但我获得相同的错误）：
public class MapsActivity extends FragmentActivity实现了OnMapReadyCallback {
private GoogleMap mMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
Location location=mMap.getMyLocation();
double lat=location.getLatitude();
double lon=location.getLongitude();
// Add a marker in Sydney and move the camera
LatLng sydney = new LatLng(lat, lon);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}
}
感谢回答我的人和编辑我评论的人......我仍然不太清楚如何格式化文本...
答案 0 :(得分：1)
打开sdk manager，下载/更新google play services。
并创建一个新的模拟器。
答案 1 :(得分：0)
加载证书可能是API中的错误，我认为任何谷歌开发人员都曾描述过，游戏服务正试图登录以验证播放应用或第三方应用，这可能是错误。我不太了解它。
但是如果您仍然无法在用户位置放置标记，您可以尝试使用以下代码进行测试并在应用程序中工作
@Override
public void onMapReady(GoogleMap googleMap)
{
myGoogleMap = googleMap;
placeMarkerOnPosition();
}
public void placeMarkerOnPosition() {
//// check permissions to access resources /////////
if (ActivityCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION) !=
PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_COARSE_LOCATION) !=
PackageManager.PERMISSION_GRANTED) {
return;
}
LocationManager locationManager = (LocationManager)
getSystemService(Context.LOCATION_SERVICE);
现在你可以用两种方式找到它
//////////////// find location if GPS provider is available (GPS should
enable to envoke this callback)
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
new LocationListener()
{
@Override
public void onLocationChanged(Location location) {
try {
Geocoder geocoder = new Geocoder(getApplicationContext());
myLatitude = location.getLatitude();
myLongitude = location.getLongitude();
LatLng myPosition = new LatLng(myLatitude,myLongitude);
List<Address> places=geocoder.getFromLocation(myLatitude,
myLongitude,1);
myLocation = places.get(0).getSubLocality()
+""+places.get(0).getLocality();
myGoogleMap.clear();
myGoogleMap.addMarker(new
MarkerOptions().position(myPosition).title(myLocation));
myGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(myPosition,
13.5f));
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
}
});
//////////////// checking with network providers /////////
if (locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0,
0, new LocationListener() {
@Override
public void onLocationChanged(Location location) {
myLatitude = location.getLatitude();
myLongitude = location.getLongitude();
LatLng myPosition = new LatLng(myLatitude, myLongitude);
myGoogleMap.clear();
myGoogleMap.addMarker(new MarkerOptions().position(myPosition).title("My
Position"));
myGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(myPosition,
13.5f));
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle)
{
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
}
});
}
//////// Or you can find it with user recent location //////////
Criteria criteria = new Criteria();
String bestProvider = locationManager.getBestProvider(criteria,true);
Locationlocation=locationManager.getLastKnownLocation(bestProvider);
////////// load your location from last recent locations ////////
if (location != null) {
Geocoder geocoder = new Geocoder(getApplicationContext());
try {
myLatitude = location.getLatitude();
myLongitude = location.getLongitude();
LatLng myPosition = new LatLng(myLatitude, myLongitude);
List<Address> places =
geocoder.getFromLocation(myLatitude, myLongitude, 1);
myLocation = places.get(0).getSubLocality() + " " + places.get(0).getLocality();
myGoogleMap.clear();
myGoogleMap.addMarker(new MarkerOptions().position(myPosition).title(myLocation));
myGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(myPosition, 13.5f));
} catch (IOException e) {
e.printStackTrace();
}