Question

我正在尝试使用MapView在片段中显示Google地图。地图不会显示，也不会调用onMapReady。

片段：

import android.Manifest;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
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.LatLng;

import java.util.Objects;

import butterknife.BindView;
import butterknife.ButterKnife;

public class MapFragment extends Fragment implements OnMapReadyCallback {

    private GoogleMap map;

    @BindView(R.id.map)
    MapView mapView;

    public MapFragment() {
        // Required empty public constructor
    }

    public static MapFragment newInstance() {
        return new MapFragment();
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        mapView.onCreate(savedInstanceState);
    }

    @Override
    public void onSaveInstanceState(@NonNull Bundle outState) {
        super.onSaveInstanceState(outState);
        mapView.onSaveInstanceState(outState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View mainView = inflater.inflate(R.layout.fragment_map, container, false);
        MapsInitializer.initialize(Objects.requireNonNull(this.getActivity()));
        ButterKnife.bind(this, mainView);

        if(mapView!=null){
            mapView.onCreate(savedInstanceState);
            mapView.onResume();
            mapView.getMapAsync(this);
        }
        return mainView;
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        map = googleMap;

        LatLng coordinate = new LatLng(0, 0);
        map.animateCamera(CameraUpdateFactory.newLatLngZoom(coordinate, 10));
    }

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

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

    @Override
    public void onStart() {
        super.onStart();
        mapView.onStart();
    }

    @Override
    public void onStop() {
        super.onStop();
        mapView.onStop();
    }

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

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

XML（R.layout.fragment_map）：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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"
    tools:context=".fragments.MapFragment">

    <com.google.android.gms.maps.MapView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/map" />

</FrameLayout>

我已经根据官方文档生成了API密钥，已启用它并将其包含在清单文件中。

Google地图仍然没有显示。

Android-Google Map中未显示Google Map

0 个答案: