我一直在寻找Fragment中Map（MapView）的正确代码。我有以下代码：
public class Clock extends Fragment implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
com.google.android.gms.location.LocationListener
{
public static final String ACCESS_FINE_LOCATION = "android.permission.ACCESS_FINE_LOCATION";
MapView mMapView;
private GoogleMap googleMap;
private static final int MY_PERMISSION_REQUEST_CODE = 0;
private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 1;
private GoogleApiClient mgoogleApiClient;
private LocationRequest mlocationRequest;
private Location mlastlocation;
double longitude,latitude;
Marker myCurrentMarker;
private static int UPDATE_INTERVAL = 1000;
private static int FASTEST_INTERVAL = 3000;
private static int DISPLACEMENT = 10;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.tab_clock, container, false);
setUpLocation();
mMapView = (MapView) rootView.findViewById(R.id.mapView);
mMapView.onCreate(savedInstanceState);
mMapView.onResume(); // needed to get the map to display immediately
try {
MapsInitializer.initialize(getActivity().getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
mMapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap mMap) {
googleMap = mMap;
displayLocation();
// For showing a move to my location button
if (ActivityCompat.checkSelfPermission(getActivity().getApplicationContext(), permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity().getApplicationContext(), permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
}
try {
googleMap.setMyLocationEnabled(true);
} catch (Exception e) {
e.printStackTrace();
}
// For dropping a marker at a point on the Map
// LatLng sydney = new LatLng(-34, 151);
// googleMap.addMarker(new MarkerOptions().position(sydney).title("Marker Title").snippet("Marker Description"));
//
// // For zooming automatically to the location of the marker
// CameraPosition cameraPosition = new CameraPosition.Builder().target(sydney).zoom(12).build();
// googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
mlastlocation = LocationServices.FusedLocationApi.getLastLocation(mgoogleApiClient);
if (mlastlocation != null) {
final double latitude = mlastlocation.getLatitude();
final double longitute = mlastlocation.getLongitude();
final LatLng latLng = new LatLng(latitude, longitute);
if (myCurrentMarker != null) {
myCurrentMarker.remove();
}
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Location");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE));
myCurrentMarker = googleMap.addMarker(markerOptions);
googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
googleMap.animateCamera(CameraUpdateFactory.zoomBy(10));
}
}
});
return rootView;
}
private void displayLocation() {
if (ActivityCompat.checkSelfPermission(getActivity(),
android.Manifest.permission.ACCESS_COARSE_LOCATION) !=
PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(getActivity(),
android.Manifest.permission.ACCESS_FINE_LOCATION) !=
PackageManager.PERMISSION_GRANTED) {
return;
}
mlastlocation = LocationServices.FusedLocationApi.getLastLocation(mgoogleApiClient);
if (mlastlocation != null) {
final double latitude = mlastlocation.getLatitude();
final double longitute = mlastlocation.getLongitude();
final LatLng latLng = new LatLng(latitude, longitute);
if (myCurrentMarker != null)
{
myCurrentMarker.remove();
}
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Location");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE));
myCurrentMarker = googleMap.addMarker(markerOptions);
googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
googleMap.animateCamera(CameraUpdateFactory.zoomBy(10));
}
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
private void setUpLocation() {
if (ActivityCompat.checkSelfPermission(getActivity(),
android.Manifest.permission.ACCESS_COARSE_LOCATION) !=
PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(getActivity(),
android.Manifest.permission.ACCESS_FINE_LOCATION) !=
PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(getActivity(), new String[]{
android.Manifest.permission.ACCESS_COARSE_LOCATION,
android.Manifest.permission.ACCESS_FINE_LOCATION
}, MY_PERMISSION_REQUEST_CODE);
} else {
if (checkPlaySercives()) {
buildGoogleApiClient();
creatLocationRequest();
// displayLocation();
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[]
permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION:
if (grantResults.length > 0 && grantResults[0] ==
PackageManager.PERMISSION_GRANTED) {
if (checkPlaySercives()) {
buildGoogleApiClient();
creatLocationRequest();
// displayLocation();
}
}
break;
}
}
private boolean checkPlaySercives() {
int resultCode =
GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity());
if (resultCode != ConnectionResult.SUCCESS) {
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode))
GooglePlayServicesUtil.getErrorDialog(resultCode, getActivity(),PLAY_SERVICES_RESOLUTION_REQUEST).show();
else {
Toast.makeText(getActivity(), "This device is not supported",
Toast.LENGTH_LONG).show();
}
return false;
}
return true;
}
private void buildGoogleApiClient() {
mgoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mgoogleApiClient.connect();
}
private void creatLocationRequest() {
mlocationRequest = new LocationRequest();
mlocationRequest.setInterval(UPDATE_INTERVAL);
mlocationRequest.setFastestInterval(FASTEST_INTERVAL);
mlocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mlocationRequest.setSmallestDisplacement(DISPLACEMENT);
}
@Override
public void onResume() {
super.onResume();
mMapView.onResume();
}
@Override
public void onPause() {
super.onPause();
mMapView.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
mMapView.onDestroy();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mMapView.onLowMemory();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onMapReady(GoogleMap googleMap) {
}
}
如果该应用程序已经安装在模拟器中，则可以正常工作。我有地图和位置。但是...
当我从模拟器卸载应用程序并再次运行时。它不起作用。我的意思是位置请求代码无法那样工作。
在我的logcat中，我具有： java.lang.IllegalArgumentException：GoogleApiClient 参数是必需的。 （但仅当我第一次在模拟器上安装应用程序时）
有解决方案吗？