公共类HomeFragment扩展Fragment实现OnMapReadyCallback {
private HomeViewModel homeViewModel; private GoogleMap mMap; LocationManager locationManager; LocationListener locationListener; DrawerLayout drawer; ProgressDialog dialog; double[][] cords; LatLonCoordinate[] arrayCords; JSONArray arr; ImageView recentreLoc; ImageView getInfo; ImageView burger; ImageView car; FragmentActivity fragAct; public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { //homeViewModel = // // ViewModelProviders.of(this).get(HomeViewModel.class); View root = inflater.inflate(R.layout.fragment_home, container, false); // 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); recentreLoc = (ImageView) findViewById(R.id.icon_me); getInfo = (ImageView) findViewById(R.id.icon_info); return root; } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); if (requestCode == 1) { if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener); } } } public void openDrawer(View view){ drawer.openDrawer(Gravity.LEFT); //drawer.openDrawer(1,true); } public void recentreLocation(View view){ locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener); //setting last known location Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); // LatLng me = new LatLng(lastKnownLocation.getLatitude(),lastKnownLocation.getLongitude()); mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(me, 16f)); } /** * 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(final GoogleMap googleMap) { mMap = googleMap; locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); locationListener = new LocationListener() { @Override public void onLocationChanged(Location location) { //Toast.makeText(MapsActivity.this,location.toString(),Toast.LENGTH_LONG).show(); //mMap.clear(); LatLng me = new LatLng(location.getLatitude(), location.getLongitude()); mMap.addMarker(new MarkerOptions().position(me).title("Your location")); //mMap.moveCamera(CameraUpdateFactory.newLatLng(me)); Geocoder geocoder = new Geocoder(getApplicationContext(), Locale.getDefault()); try { //getting info about location List<Address> listaddresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1); //1 - show the best match (result) if (listaddresses != null && listaddresses.size() > 0) { //Log.i("Place", listaddresses.get(0).toString()); //Deriving useful info String a = ""; if (listaddresses.get(0).getAdminArea() != null) { a += listaddresses.get(0).getAdminArea() + " "; } if (listaddresses.get(0).getLocality() != null) { a += listaddresses.get(0).getLocality() + " "; } if (listaddresses.get(0).getThoroughfare() != null) { a += listaddresses.get(0).getThoroughfare(); } //Toast.makeText(getApplicationContext(), a, Toast.LENGTH_LONG).show(); } } catch (Exception e) { e.printStackTrace(); } } @Override public void onStatusChanged(String provider, int status, Bundle extras) { } @Override public void onProviderEnabled(String provider) { } @Override public void onProviderDisabled(String provider) { } }; if (Build.VERSION.SDK_INT < 23) { if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { // TODO: Consider calling // Activity#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 Activity#requestPermissions for more details. return; } locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener); } else { if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1); } else { locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener); //setting last known location Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); // mMap.clear(); if(lastKnownLocation!= null) { LatLng me = new LatLng(lastKnownLocation.getLatitude(), lastKnownLocation.getLongitude()); //BitmapDescriptor icon = BitmapDescriptorFactory.fromResource(R.drawable.defaultphoto); int height = 100; int width = 100; BitmapDrawable bitmapdraw=(BitmapDrawable)getResources().getDrawable(R.drawable.defaultphoto); Bitmap b=bitmapdraw.getBitmap(); Bitmap smallMarker = Bitmap.createScaledBitmap(b, width, height, false); mMap.addMarker(new MarkerOptions().position(me).icon(BitmapDescriptorFactory.fromBitmap(smallMarker)).title("Your location")); mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(me, 16f)); } } } InputStream inputStream = getApplicationContext().getResources().openRawResource(R.raw.hdb_carpark_information); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, Charset.forName("UTF-8"))); String line = ""; ArrayList<String> arrayList; //double [] cords ; cords = new double[2113][2]; arrayCords = new LatLonCoordinate[2113]; int i=0; try { //dialog.show(); //dialog = ProgressDialog.show(MapsActivity.this, "", // "Connecting. Please wait...", true); reader.readLine(); while ((line = reader.readLine()) != null) { arrayList = new ArrayList<>(); //Log.i("line", line); String[] splitted = line.split("\",\""); Log.i("cords",splitted[2]+" "+splitted[3]); cords[i][0] = Double.parseDouble(splitted[2]); cords[i][1] = Double.parseDouble(splitted[3]); SVY21Coordinate svy21Coordinate = new SVY21Coordinate(cords[i][1],cords[i][0]); arrayCords[i] = SVY21.computeLatLon(svy21Coordinate); mMap.addMarker(new MarkerOptions().position(new LatLng(arrayCords[i].getLatitude(),arrayCords[i].getLongitude())) .title(splitted[1]) .snippet(splitted[4]+"\n"+splitted[5]+"\n"+splitted[6]+"\n"+splitted[7]+"\n"+splitted[8])); i++; } //dialog.dismiss(); }catch (Exception e){ e.printStackTrace(); } }} [在此处输入图片描述] [2]
错误：找不到符号方法getSupportFragmentManager（）错误：找不到符号方法findViewById（int）错误：找不到符号方法findViewById（int）错误：类型不兼容：HomeFragment无法转换为上下文错误：找不到符号方法getSystemService（String）错误：找不到符号方法getApplicationContext（）错误：找不到符号方法checkSelfPermission（String）错误：找不到符号方法checkSelfPermission（String）错误：类型不兼容：HomeFragment无法转换为上下文错误：类型不兼容：HomeFragment无法转换为Activity错误：找不到符号方法getApplicationContext（）
我正在尝试使此代码在菜单抽屉中的片段内工作，但似乎是不可能的。有人能帮我吗？公共类HomeFragment扩展Fragment实现OnMapReadyCallback {...
您必须修改onCreateView方法