谷歌地图显示空白屏幕 [英] google maps showing blank screen

问题描述

我正在尝试在一个非常简单的应用程序(一个只有google maps活动的新项目)中显示google maps，清单具有以下权限:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.ivan.pruebamaps">

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


<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>

我在@ string/google_maps_key中有一个有效的密钥.

未修改的mainActivity，与在android studio中创建的一样.

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);
}


@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));
}
}

布局文件activity_maps也是如此:

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.ivan.pruebamaps.MapsActivity" />

如果有帮助，这是我的gradle文件:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.example.ivan.pruebamaps"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.2.0'
    compile 'com.google.android.gms:play-services-maps:10.2.0'
    testCompile 'junit:junit:4.12'
}

当我执行该应用程序时，我只得到一个空白屏幕和左下角的Google徽标屏幕.我正在尝试在模拟的Nexus 5和三星银河s6中都不起作用.

解决方案

听起来您正在使用的API密钥是在另一台计算机上生成的，该计算机具有不同的调试密钥库.

您将需要为使用的每台开发机的调试密钥库添加SHA1指纹，并将其添加到开发人员控制台中的API密钥中.

此外，一旦准备好进行签名发布，就应确保将google_maps_api.xml文件的发布版本中使用的API密钥中的SHA1指纹用于发布密钥库. 请参阅此处以获取更多信息.

I'm trying to display a google maps in a very simple application (a new project with just a google maps Activity) the manifest has the permissions:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.ivan.pruebamaps">

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


<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>

I have a valid key in @string/google_maps_key.

The mainActivity it's untouched, the same as it's created in android studio.

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);
}


@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));
}
}

The same happens with the layout file activity_maps:

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.ivan.pruebamaps.MapsActivity" />

This is my gradle file if that helps :

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.example.ivan.pruebamaps"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.2.0'
    compile 'com.google.android.gms:play-services-maps:10.2.0'
    testCompile 'junit:junit:4.12'
}

When i execute the app i just get a screen with a blank screen and the Google logo in the left bottom corner. I'm trying in a emulated nexus 5, and in a samsung galaxy s6, neither works.

解决方案

It sounds like the API key you're using was generated on a different machine, which has a different debug keystore.

You will need to add the SHA1 fingerprint for the debug keystore for each dev machine you use to your API key in the developer console.

In addition to that, once you're ready to make a signed release build, be sure that you use the SHA1 fingerprint for your release keystore in the API key that goes into the release version of the google_maps_api.xml file. See here for more info.

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