Question

但我的Android应用程序还有另一个问题我开发了一个非常基本的应用程序，其中包含一个Activity并显示谷歌地图（我使用谷歌地图API）。编译结束时没有任何错误，我也生成了apk没有任何问题但是当我在不同的设备上运行我的应用程序时，只显示一个空白页面，在此页面下方有Google标记。

[![This the screenshot of my application][1]][1]


package com.example.amine.bea_mapapp;

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {

private GoogleMap mMap;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    // 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));
  }
  }

<string name="google_maps_key" templateMergeStrategy="preserve" translatable="false">My API key is here</string>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.amine.bea_mapapp">
<permission android:name="com.androidcom.example.amine.bea_mapapp.MAPS_RECEIVE" android:protectionLevel="signature"/>
<uses-permission android:name="com.androidcom.example.amine.bea_mapapp.MAPS_RECEIVE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="com.androidcom.example.amine.bea_mapapp.providers.gsf.permission.READ_GSFREVICES"/>
<uses-feature android:glEsVersion="0x00020000"
    android:required="true"/>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

    <meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="My API key is here" />

    <activity
        android:name=".MapsActivity"
        android:label="@string/title_activity_maps">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

Answer 1

您的Google API密钥似乎存在问题。你在

使用什么密钥

 <meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="My API key is here" />

如果仍然遇到问题，请使用从您的计算机生成的密钥库生成新的Google Map API密钥，并使用新的MAP API密钥构建apk。我相信它会适用于所有设备。

Answer 2

首先需要检查该设备中的 Google帐户是否已登录在您的测试设备中检查内置地图的第二件事是否正常工作。因为谷歌地图从设备现有地图应用程序和您的谷歌帐户访问一些服务。？

我需要Google Map API的帮助

2 个答案: