谷歌地图在Android的标签片段上显示为灰色
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【中文标题】谷歌地图在Android的标签片段上显示为灰色【英文标题】:Google-maps displaying grey on Tab Fragment in Android 【发布时间】:2020-04-10 06:56:31 【问题描述】:我正在尝试使用谷歌地图创建一个标签,但它显示为灰色,并且角落里有谷歌徽标。我已将 API 密钥放在调试和发布 XML 中,尝试创建新的 API 密钥和与其他答案不同的解决方案。但是没有一个起作用,logcat 没有给我任何错误,我怀疑它与活动代码有关。 如果有人可以帮助我,我将不胜感激。
这是我的地图活动
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.hackathon.R;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
/**
* A simple @link Fragment subclass.
*/
public class MapTab extends Fragment implements OnMapReadyCallback
SupportMapFragment mapFragment;
public MapTab()
// Required empty public constructor
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_map, container, false);
mapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.map);
if(mapFragment == null)
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
mapFragment = SupportMapFragment.newInstance();
ft.replace(R.id.map, mapFragment).commit();
mapFragment.getMapAsync(this);
return view;
@Override
public void onMapReady(GoogleMap googleMap)
这是我的 xml
<?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_
android:layout_
tools:context=".ui.main.MapTab" >
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_
android:layout_ />
</FrameLayout>
我的清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.hackathon">
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key" />
<activity
android:name=".ui.main.MapsActivity"
android:label="@string/title_activity_maps" />
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
【问题讨论】:
您也可以发布您的清单吗? 我添加了清单 【参考方案1】:您没有在异步方法中声明地图回调。
在片段中试试这个
更新
这是我的工作代码
public class MapFragment extends Fragment
public MapFragment()
// Required empty public constructor
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_map, container, false);
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.frg); //use SuppoprtMapFragment for using in fragment instead of activity MapFragment = activity SupportMapFragment = fragment
mapFragment.getMapAsync(new OnMapReadyCallback()
@Override
public void onMapReady(GoogleMap mMap)
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mMap.clear(); //clear old markers
CameraPosition googlePlex = CameraPosition.builder()
.target(new LatLng(37.4219999,-122.0862462))
.zoom(10)
.bearing(0)
.tilt(45)
.build();
mMap.animateCamera(CameraUpdateFactory.newCameraPosition(googlePlex), 10000, null);
mMap.addMarker(new MarkerOptions()
.position(new LatLng(37.4629101,-122.2449094))
.title("Iron Man")
.snippet("His Talent : Plenty of money"));
mMap.addMarker(new MarkerOptions()
.position(new LatLng(37.3092293,-122.1136845))
.title("Captain America"));
);
return rootView;
XML 代码
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_
android:layout_
tools:context=".MapFragment">
<fragment
android:name="com.google.android.gms.maps.SupportMapFragment"
android:id="@+id/frg"
android:layout_
android:layout_/>
</FrameLayout>
【讨论】:
我替换了地图片段行,但现在应用只是在启动时崩溃 把你的代码,替换了id,启动时还是崩溃,会不会是xml? 检查更新的答案。那是我展示地图的片段。 获取灰色地图,可能会创建一个新项目,看看是否可以修复它 创建了一个新项目,您的代码可以正常工作,非常感谢您对我的帮助。以上是关于谷歌地图在Android的标签片段上显示为灰色的主要内容,如果未能解决你的问题,请参考以下文章