不能与谷歌地图API V2获得地图 [英] Can't get map with Google Map API V2

问题描述

我试图通过使用谷歌地图API V2让我的应用程序简单的地图;我跟所有的步骤去做，但是当我启动我的应用程序，我只能用谷歌标志的左下角白拿的页面。

I'm trying to get a simple map on my app by using Google Map API V2; I followed all the steps to do it but when I launch my app, I only get white page with a Google logo in the left bottom.

如果有人能帮助我，这将是巨大的。

If someone can help me with this, it will be great..

这是XML文件：

<fragment 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"

android:id="@+id/map" tools:context=".MapsActivity"
android:name="com.google.android.gms.maps.SupportMapFragment"/>

这是文件的Java：

 package com.example.ismail.location_test;

 import android.support.v4.app.FragmentActivity;
 import android.os.Bundle;
 import com.google.android.gms.maps.GoogleMap;
 import com.google.android.gms.maps.MapFragment;
 import com.google.android.gms.maps.OnMapReadyCallback;
 import com.google.android.gms.maps.SupportMapFragment;
 import com.google.android.gms.maps.model.LatLng;
 import com.google.android.gms.maps.model.MarkerOptions;

public class MapsActivity extends FragmentActivity {

private GoogleMap mMap; 

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

}

@Override
protected void onResume() {
    super.onResume();
    setUpMapIfNeeded();
}


private void setUpMapIfNeeded() {
    // Do a null check to confirm that we have not already instantiated the map.
    if (mMap == null) {
        // Try to obtain the map from the SupportMapFragment.
        mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                .getMap();
        // Check if we were successful in obtaining the map.
        if (mMap != null) {
            setUpMap();
        }
    }
}


private void setUpMap() {
    mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
}

最后的清单：

<?xml version="1.0" encoding="utf-8"?>

<uses-sdk
    android:minSdkVersion="17"
    android:targetSdkVersion="21" />

<uses-permission android:name="com.example.ismail.location_test.permission.MAPS_RECEIVE"/>
<permission      android:name="com.example.ismail.location_test.permission.MAPS_RECEIVE" android:protectionLevel="signature"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true"/>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />
    <meta-data
        android:name="com.google.android.maps.v2.API_KEY"
        android:value="AIzaSyBbHBnsC_YhHKQhhsnaahYiT3GltK52It0" />

    <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>

推荐答案

我怀疑三件事错在你的code：

I suspect 3 things wrong in your code :

（1）在使用它之前声明权限：

(1) Declare permission before using it :

    <permission android:name="com.example.ismail.location_test.permission.MAPS_RECEIVE" android:protectionLevel="signature"/>
    <!-- after declare use this -->
    <uses-permission android:name="com.example.ismail.location_test.permission.MAPS_RECEIVE"/>

（2）缺少声明版本的克数变量：

(2) Missing Declare gms version variable :

  <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />

（3）缺少申报API_KEY：

(3) Missing declare API_KEY :

<meta-data
    android:name="com.google.android.maps.v2.API_KEY"
    android:value="AIzaS33yBBDxSDFsdf33BK-7HCasdfSADFfa72wJnKLZvq6A" />

请与上述3名犯罪嫌疑人先检查：那么，如果仍错误那里，您可以重新确认步骤，使从的这里

Please check with above 3 suspects first : then if still error is there you can re-confirm steps to enable Google Maps from here

这篇关于不能与谷歌地图API V2获得地图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！