Android Studio Log.d无法在Google地图的片段中使用

Question

我有这个代码，导航抽屉中的片段，它使用谷歌地图API制作地图并制作标记，并且在Android Studio的Logcat框中没有显示log.d，如果有人可以帮助我这样我就可以做测试，谢谢！ （我编写此代码是因为我想从FireBaseDatabase创建Google Maps标记）。

import android.Manifest;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.MapsInitializer;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;   
import java.util.ArrayList;


public class MapFragment extends Fragment {
    private FirebaseAuth.AuthStateListener mAuthListener;
    private FirebaseAuth mAuth = FirebaseAuth.getInstance();

    DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
    DatabaseReference perdidosUbiRef = rootRef.child("Perdidos").child("Ubicación");


    public MapFragment() {            
    }

    MapView mMapView;
    private GoogleMap googleMap;       
    ArrayList<LatLng> markerPoints;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        //PON TITULO BAR
        ((AppCompatActivity) getActivity()).getSupportActionBar().setTitle("Mapa");
        View rootView = inflater.inflate(R.layout.fragment_perdidosmap, container, false);

        mMapView= (MapView) rootView.findViewById(R.id.mapView);
        mMapView.onCreate(savedInstanceState);    
        mMapView.onResume();

        try {
            MapsInitializer.initialize(getActivity().getApplicationContext());
        } catch (Exception e) {
            e.printStackTrace();
        }

        mMapView.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(GoogleMap mMap) {
                googleMap = mMap;


                if (checkLocationPermission()) {
                    if (ContextCompat.checkSelfPermission(getActivity(),
                            Manifest.permission.ACCESS_FINE_LOCATION)
                            == PackageManager.PERMISSION_GRANTED) {

                        //Request location updates:
                        googleMap.setMyLocationEnabled(true);
                    }
                }

                markerPoints = new ArrayList<LatLng>();   
                googleMap.getUiSettings().setCompassEnabled(true);
                googleMap.getUiSettings().setMyLocationButtonEnabled(true);
                googleMap.getUiSettings().setRotateGesturesEnabled(true);


                //PROVA BASE DADES
                ValueEventListener eventListener = new ValueEventListener() {
                    @Override
                    public void onDataChange(DataSnapshot dataSnapshot) {
                        for(DataSnapshot ds : dataSnapshot.getChildren()) {
                            Float Lat = ds.child("Lat").getValue(Float.class);
                            Float Long = ds.child("Long").getValue(Float.class);

                            Log.d("ValuesofLat", "HELLOOO");

                        }
                    }

                    @Override
                    public void onCancelled(DatabaseError databaseError) {

                    }
                };
                perdidosUbiRef.addListenerForSingleValueEvent(eventListener);



                // For dropping a marker at a point on the Map
                LatLng Barcelona = new LatLng(Float.parseFloat(String.valueOf(41.3818)), Float.parseFloat(String.valueOf(2.1685)));
                googleMap.addMarker(new MarkerOptions().position(Barcelona).
                        title("Tetsuo").snippet("Es perro macarra"));

                // For zooming automatically to the location of the marker
                CameraPosition cameraPosition = new CameraPosition.Builder().target(Barcelona).zoom(12).build();
                googleMap.animateCamera(CameraUpdateFactory.newCameraPosition
                        (cameraPosition ));



            }
        });

        return rootView;
    }

    @Override
    public void onResume() {
        super.onResume();
        mMapView.onResume();
    }

    @Override
    public void onPause() {
        super.onPause();
        mMapView.onPause();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        mMapView.onDestroy();
    }

    @Override
    public void onLowMemory() {
        super.onLowMemory();
        mMapView.onLowMemory();
    }

    public boolean checkLocationPermission() {
        if (ContextCompat.checkSelfPermission(getActivity(),
                Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {

            // Should we show an explanation?
            if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(),
                    Manifest.permission.ACCESS_FINE_LOCATION)) {

                // Show an explanation to the user *asynchronously* -- don't block
                // this thread waiting for the user's response! After the user
                // sees the explanation, try again to request the permission.
                new AlertDialog.Builder(getActivity())
                        .setTitle("")
                        .setMessage("")
                        .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                //Prompt the user once explanation has been shown
                                ActivityCompat.requestPermissions(getActivity(),new String[]
                                        {Manifest.permission.ACCESS_FINE_LOCATION},1);
                            }
                        })
                        .create()
                        .show();


            } else {
                // No explanation needed, we can request the permission.
                ActivityCompat.requestPermissions(getActivity(),
                        new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                        1);
            }
            return false;
        } else {
            return true;
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {
        switch (requestCode) {
            case 1:
            {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    // permission was granted, yay! Do the
                    // location-related task you need to do.
                    if (ContextCompat.checkSelfPermission(getActivity(),
                            Manifest.permission.ACCESS_FINE_LOCATION)
                            == PackageManager.PERMISSION_GRANTED) {


                        googleMap.setMyLocationEnabled(true);
                    }

                } else {



                }
                return;
            }

        }
    }

}

Log.d在这部分代码中：

ValueEventListener eventListener = new ValueEventListener() {
                    @Override
                    public void onDataChange(DataSnapshot dataSnapshot) {
                        for(DataSnapshot ds : dataSnapshot.getChildren()) {
                            Float Lat = ds.child("Lat").getValue(Float.class);
                            Float Long = ds.child("Long").getValue(Float.class);

                            Log.d("ValuesofLat", "HELLOOO");

                        }
                    }

我的Logcat的盒子image

Answer 1

您需要从logcat中的搜索栏中删除ValuesofLat，它才能正常工作

只需从logcat中清除搜索栏就能正常工作

检查下图

清除搜索栏，如下图所示，它将正常工作