Android studio v0.3.2, gradle, google maps v2.0 找不到类“com.google.android.gms.maps.MapFragment
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【中文标题】Android studio v0.3.2, gradle, google maps v2.0 找不到类“com.google.android.gms.maps.MapFragment【英文标题】：Android studio v0.3.2, gradle, google maps v2.0 Didn't find class "com.google.android.gms.maps.MapFragment 【发布时间】：2013-11-14 09:04:00 【问题描述】：我在使用 Google Maps android v2.0 时遇到问题。因为我尝试了很多选项，我总是得到这个堆栈跟踪：
1-03 17:39:26.015 2398-2398/com.** E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfocom.**/com.**
.MainActivity: android.view.InflateException: Binary XML file line #24: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
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:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #24: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
at android.app.Activity.setContentView(Activity.java:1881)
at android.support.v7.app.ActionBarActivity.superSetContentView(ActionBarActivity.java:208)
at android.support.v7.app.ActionBarActivityDelegateICS.setContentView(ActionBarActivityDelegateICS.java:111)
at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:76)
at com.**.MainActivity.onCreate(MainActivity.java:43)
at android.app.Activity.performCreate(Activity.java:5104)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.google.android.gms.maps.MapFragment: make sure class name exists, is public, and has an empty constructor that is public
at android.support.v4.app.Fragment.instantiate(Fragment.java:409)
at android.support.v4.app.Fragment.instantiate(Fragment.java:377)
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:277)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
at android.app.Activity.setContentView(Activity.java:1881)
at android.support.v7.app.ActionBarActivity.superSetContentView(ActionBarActivity.java:208)
at android.support.v7.app.ActionBarActivityDelegateICS.setContentView(ActionBarActivityDelegateICS.java:111)
at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:76)
at com.**.MainActivity.onCreate(MainActivity.java:43)
at android.app.Activity.performCreate(Activity.java:5104)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
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:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.maps.MapFragment" on path: /data/app/com.**-2.apk
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
at android.support.v4.app.Fragment.instantiate(Fragment.java:399)
at android.support.v4.app.Fragment.instantiate(Fragment.java:377)
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:277)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
at android.app.Activity.setContentView(Activity.java:1881)
at android.support.v7.app.ActionBarActivity.superSetContentView(ActionBarActivity.java:208)
at android.support.v7.app.ActionBarActivityDelegateICS.setContentView(ActionBarActivityDelegateICS.java:111)
at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:76)
at com.**.MainActivity.onCreate(MainActivity.java:43)
at android.app.Activity.performCreate(Activity.java:5104)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
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:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
我的 build.grade：
buildscript
repositories
mavenCentral()
dependencies
classpath 'com.android.tools.build:gradle:0.6.+'
apply plugin: 'android'
repositories
mavenCentral()
android
compileSdkVersion 19
buildToolsVersion "19"
defaultConfig
minSdkVersion 8
targetSdkVersion 19
dependencies
compile 'com.google.android.gms:play-services:3.1.36'
// compile 'com.google.android.gms:play-services:+' //3.2.25
compile 'com.android.support:support-v4:19.0.+'
compile 'com.android.support:appcompat-v7:19.0.+'
我的清单：
<?xml version="1.0" encoding="utf-8"?>
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="*****"/>
<activity
android:name="com.*.NonLoggedActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="@string/app_name"
android:theme="@style/FullscreenTheme" >
</activity>
<activity
android:name="com.*.LoginActivity"
android:label="@string/title_activity_login"
android:windowSoftInputMode="adjustResize|stateVisible" >
</activity>
<activity
android:name="com.*.MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<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"/>
<permission
android:name="com.*.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.*.permission.MAPS_RECEIVE" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<uses-library
android:name="com.google.android.maps"
android:required="false" />
在activity_main.xml中：
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_
android:layout_
android:name="com.google.android.gms.maps.MapFragment"/>
SDK 管理器：
和项目结构：
知道有什么问题吗？
【问题讨论】：
您要在什么设备上运行？ 模拟器和goclever.com/de/produkte,c1/tablet-pc,c5/aries-785,a149.html 有哪些 Android 版本？ 你知道出了什么问题吗？ 看起来 google-play-services.jar 类没有放在您的 apk 中，但您的 build.gradle 是正确的。您是否使用gradle installDebug 将其安装在设备上？
【参考方案1】：
将依赖项更改为：
dependencies
// compile 'com.google.android.gms:play-services:3.1.36'
compile 'com.google.android.gms:play-services:3.2.25' //3.2.25
compile 'com.android.support:support-v4:19.0.+'
compile 'com.android.support:appcompat-v7:19.0.+'
并在命令行中写入
sudo . gradlew clean
sudo . gradlew build
sudo . gradlew installDebug
我在 Android Studio 中尝试过，但是当我通过控制台执行此操作时，我的应用程序运行成功。
【讨论】：
【参考方案2】：其他解决方案：
在 android studio 中重建项目：
Build->rebuild project
【讨论】：
【参考方案3】：问题是你错过了这个：
<meta-data android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
因此，任何解决方案都不会成功，因为被其他问题所掩盖。
【讨论】：
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