android studio中的元数据问题

Question

大家好我已经尝试了在这里和开发者网站上找到的所有教程，我无法找到问题的答案...好吧我正在尝试创建一个简单的应用程序来渲染地图使用gmaps ...所以我已经下载了正确的libreries ...并在我的build.gradle中编译它们......所以首先让我告诉你我的代码......

这是我的manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.solmoviles.gpsmovil"
    android:versionCode="1"
    android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="19" />
<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"/>
<!-- The following two permissions are not required to use
     Google Maps Android API v2, but are recommended. -->
<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="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.solmoviles.gpsmovil.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />
    </application>

在这里你有我的build.gradle

dependencies {
    compile 'com.android.support:appcompat-v7:+'
    compile 'com.google.android.gms:play-services:4.0.30'
    compile 'com.android.support:appcompat-v7:18.0.0'
}

最后在这里你有我的logcat错误

12-26 17:06:21.629  32452-32452/com.solmoviles.gpsmovil E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.solmoviles.gpsmovil/com.solmoviles.gpsmovil.MainActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2088)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2113)
        at android.app.ActivityThread.access$700(ActivityThread.java:139)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1224)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:4918)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
        at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: API key not found.  Check that <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="your API key"/> is in the <application> element of AndroidManifest.xml
        at maps.af.ay.a(Unknown Source)
        at maps.af.ay.a(Unknown Source)
        at maps.af.al.a(Unknown Source)
        at maps.af.be.a(Unknown Source)
        at maps.af.bd.a(Unknown Source)
        at cmj.onTransact(SourceFile:107)
        at android.os.Binder.transact(Binder.java:326)
        at com.google.android.gms.maps.internal.IMapFragmentDelegate$a$a.onCreateView(Unknown Source)
        at com.google.android.gms.maps.SupportMapFragment$a.onCreateView(Unknown Source)
        at com.google.android.gms.dynamic.a$4.b(Unknown Source)
        at com.google.android.gms.dynamic.a.a(Unknown Source)
        at com.google.android.gms.dynamic.a.onCreateView(Unknown Source)
        at com.google.android.gms.maps.SupportMapFragment.onCreateView(Unknown Source)
        at android.support.v4.app.Fragment.performCreateView(Fragment.java:1500)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:900)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1082)
        at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1184)
        at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:291)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)

所以当我将元数据的格式更改为建议的格式时...它会抛出一个错误，表示它期望值为4050300而反之......请帮助我......

在应用了Emmanuel给我的建议后，我有了这个

在这里，您可以按照建议的方式使用清单...

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.solmoviles.gpsmovil.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <meta-data
        android:name="com.google.android.maps.v2.API_KEY"
        android:value="AIzaSyxxxxxxxxxxxxxxxxxxxxxx7Wb8"/>
    </application>

出于安全原因，我把x放在api密钥上......而logcat显示了这个

 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.solmoviles.gpsmovil/com.solmoviles.gpsmovil.MainActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2088)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2113)
        at android.app.ActivityThread.access$700(ActivityThread.java:139)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1224)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:4918)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
        at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: The meta-data tag in your app's AndroidManifest.xml does not have the right value.  Expected 4030500 but found 0.  You must have the following declaration within the <application> element:     <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
        at com.google.android.gms.common.GooglePlayServicesUtil.n(Unknown Source)
        at com.google.android.gms.common.GooglePlayServicesUtil.isGooglePlayServicesAvailable(Unknown Source)
        at com.google.android.gms.maps.internal.q.v(Unknown Source)
        at com.google.android.gms.maps.internal.q.u(Unknown Source)
        at com.google.android.gms.maps.MapsInitializer.initialize(Unknown Source)
        at com.google.android.gms.maps.SupportMapFragment$b.cE(Unknown Source)
        at com.google.android.gms.maps.SupportMapFragment$b.a(Unknown Source)
        at com.google.android.gms.dynamic.a.a(Unknown Source)
        at com.google.android.gms.dynamic.a.onInflate(Unknown Source)
        at com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown Source)

Answer 1

您必须拥有两个元数据 - 播放服务版 AND 地图API密钥，因此您的清单将如下所示：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.solmoviles.gpsmovil"
    android:versionCode="1"
    android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="19" />
<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"/>
<!-- The following two permissions are not required to use
 Google Maps Android API v2, but are recommended. -->
<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="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.solmoviles.gpsmovil.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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

Answer 2

就像Exception所说，你错过了你的API密钥。您应该在结束AndroidManifest.xml代码前的</application>上使用这样的结构：

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