无法实例化android.gms.maps.MapFragment [英] Unable instantiate android.gms.maps.MapFragment

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问题描述

我尝试做与谷歌地图的演示机器人V2非常简单actitiviy，只需复制code从谷歌网页： <一href="https://developers.google.com/maps/documentation/android/start#adding_the_api_key_to_your_application">https://developers.google.com/maps/documentation/android/start#adding_the_api_key_to_your_application

I try to do a demo with google maps android v2 with very simple actitiviy, just copy code from google page: https://developers.google.com/maps/documentation/android/start#adding_the_api_key_to_your_application

有关的活动：

package com.example.mapdemo;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity extends Activity {

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

布局：

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/map"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  class="com.google.android.gms.maps.MapFragment"/>

我不得不根据页面申请API密钥和修改我的Andr​​oidManifest.xml文件，就像这样：

I had apply for a api key according to page and modify my androidmanifest.xml file, just like this:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.wenhai.driverschool"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

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

    <!-- add for map2 -->
    <permission
        android:name="com.example.mapdemo.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />

    <uses-permission android:name="com.example.mapdemo.permission.MAPS_RECEIVE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <!-- External storage for caching. -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <!-- Maps API needs OpenGL ES 2.0. -->
    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />

    <application
        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="AIzaSyDVAF4WaVSVRDKJx87It8OSFP5txQcPabc" />

        <activity
            android:name=".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>

</manifest>

我也引用我的应用程序谷歌播放services_lib在eclipse。

I also reference my app to google-play-services_lib in eclipse.

但每次，在logcat中错误报告是这样的：

but everytime, error report in logcat like this:

2-05 16:22:53.609: E/AndroidRuntime(21623): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.wenhai.driverschool/com.wenhai.driverschool.MainActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.ActivityThread.access$600(ActivityThread.java:127)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.os.Handler.dispatchMessage(Handler.java:99)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.os.Looper.loop(Looper.java:137)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.ActivityThread.main(ActivityThread.java:4441)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at java.lang.reflect.Method.invokeNative(Native Method)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at java.lang.reflect.Method.invoke(Method.java:511)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at dalvik.system.NativeStart.main(Native Method)
12-05 16:22:53.609: E/AndroidRuntime(21623): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:697)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:255)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.Activity.setContentView(Activity.java:1835)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at com.wenhai.driverschool.MainActivity.onCreate(MainActivity.java:11)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.Activity.performCreate(Activity.java:4465)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
12-05 16:22:53.609: E/AndroidRuntime(21623):    ... 11 more
12-05 16:22:53.609: E/AndroidRuntime(21623): Caused by: android.app.Fragment$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
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.Fragment.instantiate(Fragment.java:581)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.Fragment.instantiate(Fragment.java:549)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.Activity.onCreateView(Activity.java:4235)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:673)
12-05 16:22:53.609: E/AndroidRuntime(21623):    ... 20 more
12-05 16:22:53.609: E/AndroidRuntime(21623): Caused by: java.lang.ClassNotFoundException: com.google.android.gms.maps.MapFragment
12-05 16:22:53.609: E/AndroidRuntime(21623):    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
12-05 16:22:53.609: E/AndroidRuntime(21623):    at android.app.Fragment.instantiate(Fragment.java:571)
12-05 16:22:53.609: E/AndroidRuntime(21623):    ... 23 more

我不知道这样做的原因。

I don't know the reason for this.

如果我加入谷歌，播放services.jar到我的项目，它会报告另一个错误：

If i add google-play-services.jar into my project, it will report another error:

12-05 16:34:23.269: E/AndroidRuntime(22638): FATAL EXCEPTION: main
12-05 16:34:23.269: E/AndroidRuntime(22638): java.lang.NoClassDefFoundError: com.google.android.gms.R$styleable
12-05 16:34:23.269: E/AndroidRuntime(22638):    at com.google.android.gms.maps.GoogleMapOptions.createFromAttributes(Unknown Source)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at com.google.android.gms.maps.MapFragment.onInflate(Unknown Source)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.app.Activity.onCreateView(Activity.java:4242)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:673)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:255)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.app.Activity.setContentView(Activity.java:1835)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at com.wenhai.driverschool.MainActivity.onCreate(MainActivity.java:11)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.app.Activity.performCreate(Activity.java:4465)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.app.ActivityThread.access$600(ActivityThread.java:127)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.os.Handler.dispatchMessage(Handler.java:99)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.os.Looper.loop(Looper.java:137)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at android.app.ActivityThread.main(ActivityThread.java:4441)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at java.lang.reflect.Method.invokeNative(Native Method)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at java.lang.reflect.Method.invoke(Method.java:511)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
12-05 16:34:23.269: E/AndroidRuntime(22638):    at dalvik.system.NativeStart.main(Native Method)

任何人都可以帮我这个？

Anyone can help me about this?

非常感谢你。

推荐答案

在的IntelliJ IDEA（更新的IntelliJ 12）：

In IntelliJ IDEA (updated for IntelliJ 12):

  1. 创建一个文件<$c$c>~/android-sdk/extras/google/google_play_services/libproject/google-play-services_lib/src/dummy.java含类假{} 。
  2. 文件 - >导入模块 - > <$c$c>~/android-sdk/extras/google/google_play_services/libproject/google-play-services_lib
  3. 创建从现有来源模块
  4. 下一步 - >下一步 - >下一步 - >下一步 - >完成
  5. 文件 - >项目结构 - >模块 - > YourApp
  6. <大骨节病> + - >模块Dependency->谷歌播放-services_lib（的<大骨节病> + 按钮，在对话框的右上角）
  7. <大骨节病> + - >罐或directories-><$c$c>~/android-sdk/extras/google/google_play_services/libproject/google-play-services_lib/libs/google-play-services.jar
  8. 使用<大骨节病>向上 / <大骨节病>下箭头移动＆LT;模块的源＆GT; 到列表的底部。
  1. Create a file ~/android-sdk/extras/google/google_play_services/libproject/google-play-services_lib/src/dummy.java containing class dummy {}.
  2. File->Import Module-> ~/android-sdk/extras/google/google_play_services/libproject/google-play-services_lib
  3. Create Module from Existing Sources
  4. Next->Next->Next->Next->Finish
  5. File->Project Structure->Modules->YourApp
  6. +->Module Dependency->Google-play-services_lib (The + button is in the top right corner of the dialog.)
  7. +->Jars or directories->~/android-sdk/extras/google/google_play_services/libproject/google-play-services_lib/libs/google-play-services.jar
  8. Use the up/down arrows to move <Module source> to the bottom of the list.

您可以删除 dummy.java 如果你喜欢。

You can delete dummy.java if you like.

编辑：利用这一段时间后，我发现有一个小瑕疵/错误。 IDEA有时会抱怨不能够打开谷歌播放services_lib 目录 .iml 项目文件，尽管你从来没有告诉它有一个项目存在的事实。如果出现这种情况，重建项目解决了这个问题，至少直到它回来

After using this for a while I've found that there is a small flaw/bug. IDEA will sometimes complain about not being able to open a .iml project file in the google-play-services_lib directory, despite the fact that you never told it there was a project there. If that happens, rebuilding the project solves the problem, at least until it comes back.

这篇关于无法实例化android.gms.maps.MapFragment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！

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