android - 谷歌地图 Android API v2 教程

Question

我正在编写 Google Maps Android API v2 的教程:https://developers.google.com/maps/documentation/android/start

我只是想在我的应用程序中显示一个简单的 map ，但它无法正常工作(应用程序无法打开，并且有一个消息框显示““Test2”应用程序已停止。”)而且我不知道不知道为什么。我完全按照教程中的内容进行了操作。

这是我的代码:

安卓 list 文件:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.test2"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <permission
        android:name="com.example.test2.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>

    <uses-permission android:name="com.example.test2.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_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

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

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

        <activity
            android:name="com.example.test2.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="The key"/>
    </application>

</manifest>

activity_main.xml :

<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"/>

主要 Activity .java :

package com.example.test2;

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

public class MainActivity extends Activity {

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

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

提前谢谢你。

编辑:

这是日志:

04-09 11:58:31.689: E/AndroidRuntime(4028): FATAL EXCEPTION: main
04-09 11:58:31.689: E/AndroidRuntime(4028): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test2/com.example.test2.MainActivity}: android.view.InflateException: Binary XML file line #1: Error inflating class fragment
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.ActivityThread.access$600(ActivityThread.java:130)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.os.Looper.loop(Looper.java:137)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.ActivityThread.main(ActivityThread.java:4745)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at java.lang.reflect.Method.invokeNative(Native Method)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at java.lang.reflect.Method.invoke(Method.java:511)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at dalvik.system.NativeStart.main(Native Method)
04-09 11:58:31.689: E/AndroidRuntime(4028): Caused by: android.view.InflateException: Binary XML file line #1: Error inflating class fragment
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:256)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.Activity.setContentView(Activity.java:1867)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at com.example.test2.MainActivity.onCreate(MainActivity.java:12)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.Activity.performCreate(Activity.java:5008)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
04-09 11:58:31.689: E/AndroidRuntime(4028):     ... 11 more
04-09 11:58:31.689: E/AndroidRuntime(4028): Caused by: android.app.Fragment$InstantiationException: Unable to instantiate fragment com.google.android.gms.maps.SupportMapFragment: make sure class name exists, is public, and has an empty constructor that is public
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.Fragment.instantiate(Fragment.java:584)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.Fragment.instantiate(Fragment.java:552)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.Activity.onCreateView(Activity.java:4656)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
04-09 11:58:31.689: E/AndroidRuntime(4028):     ... 20 more
04-09 11:58:31.689: E/AndroidRuntime(4028): Caused by: java.lang.ClassNotFoundException: com.google.android.gms.maps.SupportMapFragment
04-09 11:58:31.689: E/AndroidRuntime(4028):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
04-09 11:58:31.689: E/AndroidRuntime(4028):     at android.app.Fragment.instantiate(Fragment.java:574)
04-09 11:58:31.689: E/AndroidRuntime(4028):     ... 23 more

Answer 1

我目前在这里看到的唯一问题是这一行:

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

此行属于 Google Map API v1，不应在 Google Map API V2 中编写。

如果没有 logcat 输出，我们无法为您提供更多帮助。

更新:

如果现在您粘贴了正确的 list 文件，那么您当前的问题是:

1. 您正在为 min SDK 8 开发应用程序，因此您必须使用 SupportMapFragment 而不是 MapFragment 对象在 Activity 的 XML 布局文件中。像这样:

<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"/>

您可以查看我写的关于如何将 Google Map API V2 添加到您的应用程序的博文:

Google Map API V2