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我正在尝试构建一个非常简单的谷歌地图应用程序，它只显示地图。虽然项目构建正常，但它会强制关闭模拟器。编码：

helloMaps.java： 

package com.example.hellomaps;

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

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;

public class helloMaps extends FragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_hello_maps);
       GoogleMap map = ((SupportMapFragment)  getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
       map.setMyLocationEnabled(true);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_hello_maps, menu);
        return true;
    }
}

helloMaps.manifest： 

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

    <uses-sdk
        android:minSdkVersion="11"
        android:targetSdkVersion="15" />

    <permission
        android:name="com.example.hellomaps.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />

    <uses-permission android:name="com.example.hellomaps.permission.MAPS_RECEIVE"/>
    <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" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true"/>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <uses-library android:name="com.google.android.maps"/>

        <activity
            android:name=".helloMaps"
            android:label="@string/title_activity_hello_maps" >
            <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="api key here"
            />
    </application>

</manifest>

activity_hello_maps.xml： 

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

启动应用程序会导致 classNotFoundException。logCat 输出为： 

05-11 10:43:09.614: D/AndroidRuntime(336): Shutting down VM
05-11 10:43:09.614: W/dalvikvm(336): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
05-11 10:43:09.614: E/AndroidRuntime(336): Uncaught handler: thread main exiting due to uncaught exception
05-11 10:43:09.624: E/AndroidRuntime(336): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.hellomaps/com.example.hellomaps.helloMaps}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.app.ActivityThread.access$2200(ActivityThread.java:119)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.os.Looper.loop(Looper.java:123)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.app.ActivityThread.main(ActivityThread.java:4363)
05-11 10:43:09.624: E/AndroidRuntime(336):  at java.lang.reflect.Method.invokeNative(Native Method)
05-11 10:43:09.624: E/AndroidRuntime(336):  at java.lang.reflect.Method.invoke(Method.java:521)
05-11 10:43:09.624: E/AndroidRuntime(336):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
05-11 10:43:09.624: E/AndroidRuntime(336):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
05-11 10:43:09.624: E/AndroidRuntime(336):  at dalvik.system.NativeStart.main(Native Method)
05-11 10:43:09.624: E/AndroidRuntime(336): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:582)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.view.LayoutInflater.inflate(LayoutInflater.java:385)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
05-11 10:43:09.624: E/AndroidRuntime(336):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.app.Activity.setContentView(Activity.java:1622)
05-11 10:43:09.624: E/AndroidRuntime(336):  at com.example.hellomaps.helloMaps.onCreate(helloMaps.java:12)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
05-11 10:43:09.624: E/AndroidRuntime(336):  ... 11 more
05-11 10:43:09.624: E/AndroidRuntime(336): Caused by: java.lang.NullPointerException
05-11 10:43:09.624: E/AndroidRuntime(336):  at java.lang.VMClassLoader.findLoadedClass(Native Method)
05-11 10:43:09.624: E/AndroidRuntime(336):  at java.lang.ClassLoader.findLoadedClass(ClassLoader.java:404)
05-11 10:43:09.624: E/AndroidRuntime(336):  at java.lang.ClassLoader.loadClass(ClassLoader.java:563)
05-11 10:43:09.624: E/AndroidRuntime(336):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.support.v4.app.Fragment.instantiate(Fragment.java:391)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.support.v4.app.Fragment.instantiate(Fragment.java:369)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:272)
05-11 10:43:09.624: E/AndroidRuntime(336):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:558)
05-11 10:43:09.624: E/AndroidRuntime(336):  ... 19 more
05-11 10:43:09.644: I/dalvikvm(336): threadid=7: reacting to signal 3
05-11 10:43:09.644: E/dalvikvm(336): Unable to open stack trace file '/data/anr/traces.txt': Permission denied

我的问题：
1. 我该如何进行这项工作？

4

2 回答 2

1

将此添加到应用程序元素内的清单中：

<uses-library android:name="com.google.android.maps"/>

例如：

 <application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >

    <uses-library android:name="com.google.android.maps"/>

    <activity
        android:name=".helloMaps"
        android:label="@string/title_activity_hello_maps" >
        <intent-filter>
于 2013-04-28T11:55:32.737 回答
0

你把谷歌地图的两个 API 都弄得一团糟。如果您尝试引用android-support-v4.jar我假设您正在尝试实现 Google Maps API V2。现在，如果是这种情况，那么您的代码中有很多问题很可能导致您出现classNotFoundException错误。

例如，您缺少一些权限：

<permission android:name="your.application.package.permission.MAPS_RECEIVE"  android:protectionLevel="signature"/>
<uses-permission android:name="your.application.package.permission.MAPS_RECEIVE"/>
<uses-permission android:name="android.permission.INTERNET" />
<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" />

接下来，您将不得不使用Google Maps API v2 对象，而不是您正在使用的对象，即 API V1 对象MapFragment。SupportMapFragmentMapView

您可以通过阅读我在这个主题上写的这篇博客文章来获得有关如何正确实现它的更多信息：

谷歌地图 API V2

更新：

1.SupportMapFragment首先，如果你是目标，你不需要使用API => 11。

2.删除此权限：

  <uses-library android:name="com.google.android.maps"/>

这是一个Google Map API V1权限， API V2中不需要。

3.从您的错误Error inflating class fragment中：膨胀片段存在一些问题。

首先尝试将片段放置在布局中，例如：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

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

如果这对您没有帮助，那么大多数情况下您在引用 Google Map API V2 所需的库之一时遇到问题，请再次查看我的指南并确保您正确执行了前 4 个步骤。

于 2013-04-28T12:30:09.583 回答