如何使用具有android studio 6.0运行时权限的地图活动获取当前位置
公共类MapsActivity扩展了FragmentActivity在MapReadyCallback上的实现{如何使用具有android studio 6.0运行时权限的地图活动获取当前位置,android,google-maps,android-studio,Android,Google Maps,Android Studio,公共类MapsActivity扩展了FragmentActivity在MapReadyCallback上的实现{ private GoogleMap mMap; private Location myLocation; private static final int INITIAL_REQUEST=1337; private static final int LOCATION_REQUEST=INITIAL_REQUEST+3; @Override protected void onCrea
private GoogleMap mMap;
private Location myLocation;
private static final int INITIAL_REQUEST=1337;
private static final int LOCATION_REQUEST=INITIAL_REQUEST+3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Get Current Location
// 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);
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
/* // Add a marker in Sydney and move the camera
LatLng sydney = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));*/
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker").snippet("Snippet"));
// Enable MyLocation Layer of Google Map
mMap.setMyLocationEnabled(true);
// Get LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Create a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Get the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
// Get Current Location
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)
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.ACCESS_FINE_LOCATION},LOCATION_REQUEST);
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
Location myLocation = locationManager.getLastKnownLocation(provider);
// set map type
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
// Get latitude of the current location
double latitude = myLocation.getLatitude();
// Get longitude of the current location
double longitude = myLocation.getLongitude();
// Create a LatLng object for the current location
LatLng latLng = new LatLng(latitude, longitude);
// Show the current location in Google Map
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
// Zoom in the Google Map
mMap.animateCamera(CameraUpdateFactory.zoomTo(14));
mMap.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title("You are here!").snippet("Consider yourself located"));
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,int[] grantResults){
switch (requestCode) {
case LOCATION_REQUEST: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
doLocationThing();
// permission was granted, yay! Do the
// contacts-related task you need to do.
} else {
bzzzt();
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
private void doLocationThing() {
Toast.makeText(this, "Loacation fetched", Toast.LENGTH_SHORT).show();
}
private void bzzzt() {
Toast.makeText(this, "not found", Toast.LENGTH_LONG).show();
}
在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:618）将整个
onMapReadyruntimePermissionsRequest@Override
public void onMapReady(GoogleMap googleMap) {
if(!runtimePermissionsReqest()){
// your entire code here.
}
}
private boolean runtimePermissionsRequest() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M &&
ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED ||
ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{
android.Manifest.permission.ACCESS_FINE_LOCATION,
android.Manifest.permission.ACCESS_COARSE_LOCATION}, 100);
return true;
}
return false;
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == 100) {
if (grantResults[0] != PackageManager.PERMISSION_GRANTED &&
grantResults[1] != PackageManager.PERMISSION_GRANTED) {
runtimePermissionsRequest();
}
}
}