为啥谷歌地图在首次启动时不会自动缩放到用户位置？
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【中文标题】为啥谷歌地图在首次启动时不会自动缩放到用户位置？【英文标题】：Why won't Google maps auto zoom to user location when it first starts?为什么谷歌地图在首次启动时不会自动缩放到用户位置？ 【发布时间】：2019-06-15 07:43:00 【问题描述】：当用户第一次进入 GoogleMapsActivity 时，它不会自动将他们带到他们的位置，用户必须点击右上角的小位置图标按钮，它将把他们带到他们的位置。
我尝试过使用 newLatLngZoom(latLng, zoom) 但这不起作用。在发布这个问题之前，我浏览了所有建议的问题，但没有一个有效。有些也在ios中。我正在使用安卓系统。
public class AppetiteMapsActivity extends FragmentActivity implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener
private GoogleMap mMap;
private GoogleApiClient googleApiClient;
private LocationRequest locationRequest;
private static final String TAG = "AppetiteMapsActivity";
private Location lastLocation;
private Marker currentUserLocationMarker;
private LocationManager locationManager;
private com.google.android.gms.location.LocationListener listener;
private static final int Request_User_Location_Code= 99;
private long UPDATE_INTERVAL = 2 * 1000; /* 10 secs */
private long FASTEST_INTERVAL = 2000; /* 2 sec */
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_appetite_maps);
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
checkUserLocationPermission();
// 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);
checkLocation();
@Override
public void onMapReady(GoogleMap googleMap)
mMap = googleMap;
// Add a marker in current user location and move the camera
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
buildGoogleApiClient();
// Call current location of user
mMap.setMyLocationEnabled(true);
public boolean checkUserLocationPermission()
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);
return false;
else
return true;
@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 (googleApiClient == null)
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
else
Toast.makeText(this, R.string.on_request_permission_gps_not_located, Toast.LENGTH_LONG).show();
return;
protected synchronized void buildGoogleApiClient()
googleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
googleApiClient.connect();
@Override
public void onConnected(Bundle bundle)
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(googleApiClient, locationRequest, this);
@Override
public void onConnectionSuspended(int i)
Log.i(TAG, "Connection Suspended");
googleApiClient.connect();
@Override
public void onConnectionFailed(ConnectionResult connectionResult)
Log.i(TAG, "Connection failed. Error: " + connectionResult.getErrorCode());
@Override
protected void onStart()
super.onStart();
if (googleApiClient != null)
googleApiClient.connect();
@Override
protected void onStop()
super.onStop();
if (googleApiClient.isConnected())
googleApiClient.disconnect();
protected void startLocationUpdates()
// Create the location request
locationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(UPDATE_INTERVAL)
.setFastestInterval(FASTEST_INTERVAL);
// Request location updates
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
return;
LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient,
locationRequest, this);
Log.d("reque", "--->>>>");
@Override
public void onLocationChanged(Location location)
lastLocation = location;
if (currentUserLocationMarker!=null)
currentUserLocationMarker.remove();
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title(getString(R.string.user_current_location_marker_title));
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW));
currentUserLocationMarker = mMap.addMarker(markerOptions);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomBy(14));
if(googleApiClient != null)
LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient, this);
private boolean checkLocation()
if(!isLocationEnabled())
showAlert();
return isLocationEnabled();
private void showAlert()
final AlertDialog.Builder dialog = new AlertDialog.Builder(this);
dialog.setTitle(R.string.show_alert_title_enable_location)
.setMessage(getString(R.string.show_alert_location_settings_off_1) +
getString(R.string.show_alert_location_settings_off_2))
.setPositiveButton(R.string.show_alert_positive_button_location_settings, new DialogInterface.OnClickListener()
@Override
public void onClick(DialogInterface paramDialogInterface, int paramInt)
Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(myIntent);
)
.setNegativeButton(R.string.explain_negative_button, new DialogInterface.OnClickListener()
@Override
public void onClick(DialogInterface paramDialogInterface, int paramInt)
);
dialog.show();
private boolean isLocationEnabled()
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) ||
locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
我希望 Google 地图在用户首次进入 Google 地图活动时自动转到用户位置，但用户必须单击右上角的位置按钮才能将其发送到那里。感谢您的帮助和建议！
【问题讨论】：
文档或其他地方是否有某些内容让您认为缺少某个功能？ 我不这么认为。 startLocationUpdates 说它从未使用过，但是当我将它添加到 onCreate 方法时，它使我的应用程序崩溃。到目前为止，一切都很完美，我只希望它会在 Google Maps Activity 首次启动时自动缩放到用户位置，因为到目前为止，我必须手动点击地图右上角的小圆圈图标才能去到用户位置。 虽然我明白你在说什么，但我的意思是“我认为它不应该自动为你做到这一点”。当您尝试致电startLocationUpdates() 时，您的想法是正确的。看起来您已经编写了所有这些代码。也许放弃已弃用的FusedLocationApi——见here。如果您的代码崩溃，请使用堆栈跟踪来确定出了什么问题。
非常感谢 ????感谢您的建议！
【参考方案1】：
我尝试过使用
newLatLngZoom(latLng, zoom)，但没有成功。
像这样使用它，它会工作：
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(LatLng, zoom));
mMap.getUiSettings().setRotateGesturesEnabled(false);
mMap.getUiSettings().setZoomControlsEnabled(false);
注意：
-
首先，您启用缩放控件。
然后，您执行缩放操作。
之后，您禁用缩放控件。
希望对你有帮助。
Reference for more info
【讨论】：
非常感谢您的建议！明天当我回到编码时，我将尝试添加这个！有一个美好的夜晚！感谢您的帮助。 太棒了！工作！谢谢！我们都是堆栈溢出的新手！感谢您抽出宝贵时间提供帮助！我很感激！如果你有时间，请加1我的主要帖子？谢谢！以上是关于为啥谷歌地图在首次启动时不会自动缩放到用户位置？的主要内容，如果未能解决你的问题，请参考以下文章