从Android开始谷歌地图API V2

Question

我是Android谷歌地图API的新手，我试图使用API​​开发一个小应用程序。我使用Google文档格式作为参考：https://developers.google.com/maps/documentation/android/，我谨慎行事。当我构建它并将其安装到我的设备（Android 2.3.6）时，应用程序崩溃。我按照所有说明签署应用程序并获取该特定应用程序的API密钥，并多次尝试文档的所有步骤，但没有获得任何好的结果。请，有人可以帮助我吗？我有什么缺失？ 谢谢！

的Manifest.xml

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

<uses-sdk 
    android:minSdkVersion="8" 
    android:targetSdkVersion="10" /> 

<permission 
    android:name="com.application.uprm_map.permission.MAPS_RECEIVE" 
    android:protectionLevel="signature"/> 
<uses-permission android:name="com.application.uprm_map.permission.MAPS_RECEIVE"/> 
<uses-feature 
    android:glEsVersion="0x00020000" 
    android:required="true"/> 
<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_COARSE_LOCATION"/> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> 

<application 
    android:allowBackup="true" 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" 
    android:theme="@style/AppTheme" > 
    <activity 
     android:name="com.application.uprm_map.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="<my own key>"/> 

</application> 
</manifest> 

activity_main.xml中：

<?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" 
     android:name="com.google.android.gms.maps.MapFragment"/> 

MainActivity.java

package com.application.uprm_map; 

    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.activity_main); 
    } 
    } 

产生的异常：

03-05 02:29:27.645: D/dalvikvm(32056): GC_EXTERNAL_ALLOC freed 42K, 49% free  2748K/5379K, external 0K/0K, paused 21ms 
03-05 02:29:27.650: D/AndroidRuntime(32056): Shutting down VM 
03-05 02:29:27.650: W/dalvikvm(32056): threadid=1: thread exiting with uncaught exception (group=0x4001e578) 
03-05 02:29:27.655: E/AndroidRuntime(32056): FATAL EXCEPTION: main 
03-05 02:29:27.655: E/AndroidRuntime(32056): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.application.uprm_map/com.application.uprm_map.MainActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.os.Handler.dispatchMessage(Handler.java:99) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.os.Looper.loop(Looper.java:130) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.app.ActivityThread.main(ActivityThread.java:3691) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at java.lang.reflect.Method.invokeNative(Native Method) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at java.lang.reflect.Method.invoke(Method.java:507) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:670) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at dalvik.system.NativeStart.main(Native Method) 
03-05 02:29:27.655: E/AndroidRuntime(32056): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:581) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.view.LayoutInflater.inflate(LayoutInflater.java:386) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:234) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.app.Activity.setContentView(Activity.java:1679) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at com.application.uprm_map.MainActivity.onCreate(MainActivity.java:11) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1050) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615) 
03-05 02:29:27.655: E/AndroidRuntime(32056): ... 11 more 
03-05 02:29:27.655: E/AndroidRuntime(32056): Caused by: java.lang.ClassNotFoundException: android.view.fragment in loader dalvik.system.PathClassLoader[/data/app/com.application.uprm_map-1.apk] 
03-05 02:29:27.655: E/AndroidRuntime(32056): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at java.lang.ClassLoader.loadClass(ClassLoader.java:551) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.view.LayoutInflater.createView(LayoutInflater.java:471) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:549) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66) 
03-05 02:29:27.655: E/AndroidRuntime(32056): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:568) 
03-05 02:29:27.655: E/AndroidRuntime(32056): ... 19 more 
03-05 02:29:29.660: I/dalvikvm(32056): threadid=4: reacting to signal 3 
03-05 02:29:29.665: I/dalvikvm(32056): Wrote stack traces to '/data/anr/traces.txt' 

Answer 1

首先，因为您的API级别为8或更低，所以您必须在布局文件中使用SupportMapFragment而不是MapFragment。

<?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" 
    android:name="com.google.android.gms.maps.SupportMapFragment"/> 

第二件事你必须扩展的FragmentActivity代替Activity：

public class MainActivity extends FragmentActivity { 

做好了以上的修改，然后运行应用程序。