在Google地图中显示我的当前位置 [英] Show my current location in the Google Map
本文介绍了在Google地图中显示我的当前位置的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
AndroidManifest.xml
< uses-permission android：name =android.permission.ACCESS_FINE_LOCATION/>
< uses-permission android：name =android.permission.INTERNET/>
< uses-permission android：name =android.permission.ACCESS_NETWORK_STATE/>
< uses-permission android：name =android.permission.WRITE_EXTERNAL_STORAGE/>
< uses-permission android：name =android.permission.ACCESS_COARSE_LOCATION/>
< uses-permission android：name =com.example.hp.testmap.MAPS_RECEIVE>< / uses-permission>
<使用权限android：name =com.google.android.providers.gsf.permission.READ_GSERVICES/>
< permission
android：name =com.example.hp.testmap.permission.MAPS_RECEIVE
android：protectionLevel =signature/>
< uses-feature
android：glEsVersion =0x00020000
android：required =true/>
MapsActivity.java
public void onMapReady（GoogleMap googleMap）{
mMap = googleMap;
mMap.setMyLocationEnabled（true）;
if（ActivityCompat.checkSelfPermission（this，Manifest.permission.ACCESS_FINE_LOCATION）！= PackageManager.PERMISSION_GRANTED&&&& ActivityCompat.checkSelfPermission（this，Manifest.permission.ACCESS_COARSE_LOCATION）！= PackageManager.PERMISSION_GRANTED）{
LocationManager locationManager =（LocationManager）getSystemService（Context.LOCATION_SERVICE）;
Criteria criteria = new Criteria（）;
字符串提供者= locationManager.getBestProvider（criteria，true）;
位置myLocation = locationManager.getLastKnownLocation（provider）;
mMap.setMapType（GoogleMap.MAP_TYPE_NORMAL）;
double latitude = myLocation.getLatitude（）;
double longitude = myLocation.getLongitude（）;
LatLng latLng =新LatLng（经度，纬度）;
mMap.moveCamera（CameraUpdateFactory.newLatLng（latLng））;
mMap.animateCamera（CameraUpdateFactory.zoomTo（20））;
return;
}
}
解决方案
使用此代码获取当前位置
googleMap.setMapType（GoogleMap.MAP_TYPE_NORMAL）;
if（ActivityCompat.checkSelfPermission（this，Manifest.permission.ACCESS_FINE_LOCATION）！= PackageManager.PERMISSION_GRANTED&&&& ActivityCompat.checkSelfPermission（this，Manifest.permission.ACCESS_COARSE_LOCATION）！= PackageManager.PERMISSION_GRANTED）{
// TODO：考虑调用
// ActivityCompat＃requestPermissions
//在这里请求丢失的权限，然后覆盖
// public void onRequestPermissionsResult（int requestCode，String [] permissions，
// int [] grantResults）
//处理用户授予权限的情况。有关更多详细信息，请参阅文档
//获取ActivityCompat＃requestPermissions。
return;
}
googleMap.setMyLocationEnabled（true）;
googleMap.getUiSettings（）。setZoomControlsEnabled（false）;
googleMap.getUiSettings（）。setMyLocationButtonEnabled（true）;
googleMap.getUiSettings（）。setCompassEnabled（true）;
googleMap.getUiSettings（）。setRotateGesturesEnabled（true）;
googleMap.getUiSettings（）。setZoomGesturesEnabled（true）;
if（locationManager == null）{
locationManager =（LocationManager）this.getSystemService（Context.LOCATION_SERVICE）; （locationManager.getAllProviders（）。contains（LocationManager.GPS_PROVIDER））{
isGPSEnabled = locationManager.isProviderEnabled（LocationManager.GPS_PROVIDER）;
}
if
isNetworkProviderEnabled = locationManager.isProviderEnabled（LocationManager.NETWORK_PROVIDER）;
if（isGPSEnabled）{
location = getLastLocationByProvider（locationManager，LocationManager.GPS_PROVIDER，getApplicationContext（））;
} else if（isNetworkProviderEnabled）{
location = getLastLocationByProvider（locationManager，LocationManager.NETWORK_PROVIDER，getApplicationContext（））;
}
if（location！= null）{
latitude = location.getLatitude（）;
longitude = location.getLongitude（）;
} else {
if（isNetworkProviderEnabled）{
locationManager.requestLocationUpdates（LocationManager.NETWORK_PROVIDER，100000，1，this）;
provider_info = LocationManager.NETWORK_PROVIDER;
} else if（isGPSEnabled）{
locationManager.requestLocationUpdates（LocationManager.GPS_PROVIDER，100000，1，this）;
provider_info = LocationManager.GPS_PROVIDER;
} else {
alertDialog = Util.showOkDialog（new View.OnClickListener（）{
@Override
public void onClick（View view）{
if（Env.currentActivity！= null）{
if（Env.currentActivity instanceof LocationActivity）{
try {
gotoSettings（）;
} catch（Exception e）{
e.printStackTrace（）;
}
}
}
if（alertDialog！= null）{
alertDialog.dismiss（）;
alertDialog = null;
}
}
}，this.getResources（）。getString（R.string.location_service_validation））;
}
location = locationManager.getLastKnownLocation（provider_info）;
if（location！= null）{
latitude = location.getLatitude（）;
longitude = location.getLongitude（）;
}
}
MarkerOptions marker = new MarkerOptions（）。position（
new LatLng（latitude，longitude））
.title （getFullAddressLine（本））;
marker.icon（BitmapDescriptorFactory
.defaultMarker（BitmapDescriptorFactory.HUE_GREEN））;
googleMap.addMarker（marker）;
CameraPosition cameraPosition = new CameraPosition.Builder（）
.target（new LatLng（latitude，
longitude））。zoom（15）.build（）;
googleMap.animateCamera（CameraUpdateFactory
.newCameraPosition（cameraPosition））;
Finally I succeed to display the map,Now,I want to show my current location, I tried by using these code but it didn't work when I clicked the my location button in the top right corner.
AndroidManifest.xml
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="com.example.hp.testmap.MAPS_RECEIVE"></uses-permission>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<permission
android:name="com.example.hp.testmap.permission.MAPS_RECEIVE"
android:protectionLevel="signature"/>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
MapsActivity.java
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setMyLocationEnabled(true);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, true);
Location myLocation = locationManager.getLastKnownLocation(provider);
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
double latitude = myLocation.getLatitude();
double longitude = myLocation.getLongitude();
LatLng latLng = new LatLng(latitude, longitude);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(20));
return;
}
}
解决方案
USe this Code for current Location
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.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.
return;
}
googleMap.setMyLocationEnabled(true);
googleMap.getUiSettings().setZoomControlsEnabled(false);
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
googleMap.getUiSettings().setCompassEnabled(true);
googleMap.getUiSettings().setRotateGesturesEnabled(true);
googleMap.getUiSettings().setZoomGesturesEnabled(true);
if (locationManager == null) {
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
}
if (locationManager.getAllProviders().contains(LocationManager.GPS_PROVIDER)) {
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
isNetworkProviderEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (isGPSEnabled) {
location = getLastLocationByProvider(locationManager, LocationManager.GPS_PROVIDER, getApplicationContext());
} else if (isNetworkProviderEnabled) {
location = getLastLocationByProvider(locationManager, LocationManager.NETWORK_PROVIDER, getApplicationContext());
}
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
} else {
if (isNetworkProviderEnabled) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 100000, 1, this);
provider_info = LocationManager.NETWORK_PROVIDER;
} else if (isGPSEnabled) {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 100000, 1, this);
provider_info = LocationManager.GPS_PROVIDER;
} else {
alertDialog = Util.showOkDialog(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (Env.currentActivity != null) {
if (Env.currentActivity instanceof LocationActivity) {
try {
gotoSettings();
} catch (Exception e) {
e.printStackTrace();
}
}
}
if (alertDialog != null) {
alertDialog.dismiss();
alertDialog = null;
}
}
}, this.getResources().getString(R.string.location_service_validation));
}
location = locationManager.getLastKnownLocation(provider_info);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
MarkerOptions marker = new MarkerOptions().position(
new LatLng(latitude, longitude))
.title(getFullAddressLine(this));
marker.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
googleMap.addMarker(marker);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(latitude,
longitude)).zoom(15).build();
googleMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
这篇关于在Google地图中显示我的当前位置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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