Android Google Map显示空白屏幕 [英] Android Google Map show blank screen

问题描述

我用默认的Google地图启动android studio：

在google_maps_api中添加我的密钥。 xml，我确信路径：

这是我的发明：

 <？xml version =1.0encoding =utf-8？> 
< manifest xmlns：android =http://schemas.android.com/apk/res/android
 package =com.example.erfan.google> 
 
 <！ -   -  
使用
 Google地图Android API v2时不需要ACCESS_COARSE / FINE_LOCATION权限，但您必须指定粗略或精细的
位置'MyLocation'功能的权限。 
 
 
  - > 
 
 
< permission 
 android：name =com.example.erfan.google.permission.MAPS_RECEIVE
 android：protectionLevel =signature/> 
<使用权限android：name =com.example.erfan.google.permission.MAPS_RECEIVE/> 
 
<使用权限android：name =android.permission.WRITE_EXTERNAL_STORAGE/> 
<使用权限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-permission android：name =android.permission.INTERNET/> 
< uses-permission android：name =android.permission.ACCESS_NETWORK_STATE/> 
 
 $ b< application 
 android：allowBackup =true
 android：icon =@ mipmap / ic_launcher
 android：label =@ string / app_name
 android：supportsRtl =true
 android：theme =@ style / AppTheme> 
 
 <！ -   -  
 Google Maps API API键被定义为字符串资源。 
（请参阅文件res / values / google_maps_api.xml）。 
请注意，API密钥已链接到用于签署APK的加密密钥。 
您需要为每个加密密钥使用不同的API密钥，包括用于
签名的发布密钥。 
您可以在src / debug /和src / release /中定义调试和发布目标的键。 
  - > 
< meta-data 
 android：name =com.google.android.geo.API_KEY
 android：value =@ string / google_maps_key/> 
 
< activity 
 android：name =。MapsActivity
 android：label =@ string / title_activity_maps> 
< intent-filter> 
  
 
 
 
 解决方案
碰巧发生了同样的情况。 .developers.google.com / apis /rel =nofollow noreferrer> https://console.developers.google.com/apis/  
 
 
 
通过创建一个新项目（左窗格 - > API管理）创建/激活/启用另一个键。
 
 
 
他们会给你一个新的密钥。
 
 
 
它对我有效。
 
i start android studio with the default google map : 


add my key in google_maps_api.xml and i am sure about path:
  

this is my manifast:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.erfan.google">

    <!--
         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.


    -->


    <permission
        android:name="com.example.erfan.google.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>
    <uses-permission android:name="com.example.erfan.google.permission.MAPS_RECEIVE"/>

    <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-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />


    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        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=".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>

</manifest>
main activity :
package com.example.erfan.google;

import android.support.v4.app.FragmentActivity;
import android.os.Bundle;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
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 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));
    }
}
where i wrong ? try so many suggestions in another post in stack over flow but not work for me :( still blank google map :
解决方案
Happened the same to me. I just went here:

https://console.developers.google.com/apis/

And created/activated/enabled another key by creating a new project (left pane -> API administration).

They will give you a new key.

It worked for me.

                        
这篇关于Android Google Map显示空白屏幕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！