我之前使用LocationManager来追踪用户的当前位置,现在将位置管理器更改为FusedLocation API后,即使设置了map.setMyLocationEnabled(true)
,蓝点和圆圈也没有显示出来。我可以在地图碎片的右上角看到当前位置图标,但是点击它没有任何反应。我将代码还原回LocationManager后,能够看到指向我的当前位置的蓝点。使用Fused Location API可能出了什么问题。
我之前使用LocationManager来追踪用户的当前位置,现在将位置管理器更改为FusedLocation API后,即使设置了map.setMyLocationEnabled(true)
,蓝点和圆圈也没有显示出来。我可以在地图碎片的右上角看到当前位置图标,但是点击它没有任何反应。我将代码还原回LocationManager后,能够看到指向我的当前位置的蓝点。使用Fused Location API可能出了什么问题。
针对API 23或更高版本:
请参考这个答案...
针对API 22及以下版本:
以下代码适用于我,它具有MyLocation
蓝色圆点/圆圈,并且还使用Fused Location Provider在当前位置放置Marker
。
这是我使用的所有Activity代码:
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import android.location.Location;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.OnMapReadyCallback;
public class MainActivity extends AppCompatActivity implements
GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener,
LocationListener,
OnMapReadyCallback {
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
LatLng latLng;
GoogleMap mGoogleMap;
SupportMapFragment mFragment;
Marker mCurrLocation;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
mGoogleMap.setMyLocationEnabled(true);
buildGoogleApiClient();
mGoogleApiClient.connect();
}
@Override
public void onPause() {
super.onPause();
//Unregister for location callbacks:
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
protected synchronized void buildGoogleApiClient() {
Toast.makeText(this,"buildGoogleApiClient",Toast.LENGTH_SHORT).show();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
@Override
public void onConnected(Bundle bundle) {
Toast.makeText(this,"onConnected",Toast.LENGTH_SHORT).show();
Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
if (mLastLocation != null) {
//place marker at current position
mGoogleMap.clear();
latLng = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
mCurrLocation = mGoogleMap.addMarker(markerOptions);
}
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(5000); //5 seconds
mLocationRequest.setFastestInterval(3000); //3 seconds
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
//mLocationRequest.setSmallestDisplacement(0.1F); //1/10 meter
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
@Override
public void onConnectionSuspended(int i) {
Toast.makeText(this,"onConnectionSuspended",Toast.LENGTH_SHORT).show();
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Toast.makeText(this,"onConnectionFailed",Toast.LENGTH_SHORT).show();
}
@Override
public void onLocationChanged(Location location) {
//remove previous current location marker and add new one at current position
if (mCurrLocation != null) {
mCurrLocation.remove();
}
latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
mCurrLocation = mGoogleMap.addMarker(markerOptions);
Toast.makeText(this,"Location Changed",Toast.LENGTH_SHORT).show();
//If you only need one location, unregister the listener
//LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
主活动的布局文件:activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<fragment
class="com.google.android.gms.maps.SupportMapFragment"
android:id="@+id/map"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</RelativeLayout>
结果:
您需要在清单文件中添加以下权限:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
。 我甚至没有想到这个权限与地图有任何关系.. - chabislavMarkerOptions().position(new LatLng(
location.getLatitude(), location.getLongitude()));
if (location!=null) {
googleMap.clear();
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(location.getLatitude(), location.getLongitude())).zoom(14).build();
googleMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
// create markerOptions
MarkerOptions markerOptions = new MarkerOptions().position(new LatLng(
location.getLatitude(), location.getLongitude()));
// ROSE color icon
markerOptions.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_ROSE));
markerOptions.position(latLng);
// adding markerOptions
Marker marker = googleMap.addMarker(markerOptions);
dropPinEffect(marker);
}
SupportMapFragment
吗? - Daniel NugentSupportMapFragment
。 - flexdroidmFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); map = mFragment.getMap(); map.setMyLocationEnabled(true);
- Daniel Nugent