android - 从 Android Google Maps API V2 开始

Question

我是 Android Google Maps API 的新手，我正在尝试使用该 API 开发一个小型应用程序。我使用 Google 文档表单作为引用:https://developers.google.com/maps/documentation/android/我小心翼翼地遵循所有步骤。当我构建它并将其安装到我的设备(Android 2.3.6)上时，应用程序崩溃了。我按照所有说明对应用程序进行签名并获取该特定应用程序的 API key ，多次尝试了文档中的所有步骤，但没有任何好的结果。请问有人可以帮我吗？我还缺什么吗？ 谢谢!

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:

   <?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);
     }
    }

异常(exception):

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，由于您的 API 级别为 8 或更低，因此您必须在布局文件中使用 SupportMapFragment 而不是 MapFragment ，如下所示。

 <?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 FragmentActivity 而不是 Activity :

  public class MainActivity extends FragmentActivity {

执行上述更改，然后运行您的应用程序。