1

我是android开发的新手。我从一些简单但第一步开始，只是显示一张地图。以下是我为显示地图执行的步骤 1) 我获得了 google api 密钥，并配置了 android.mainfest。我添加了权限：MAPS_RECEIVE、ACCESS_COARSE_LOCATION、INTERNET 和我的 google map v2 api key in element。2) 我将 google-play-services_lib 导入我的工作区。构建它，并将它的引用添加到我的项目中。3）因为我使用的是android 2.3.3（api 10），所以我使用了SupportMapFragment而不是MapFragment。这是我的布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ShowMapActivity" >
        <fragment android:id="@+id/map"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                class="com.google.android.gms.maps.SupportMapFragment "/>
</RelativeLayout>

这是我在 ShowMapActivity 中的代码（它是 FragmentActivity 的扩展）

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_show_map);
        if(findViewById(R.id.map)!=null)
        {
            SupportMapFragment fragment = new SupportMapFragment();
            getSupportFragmentManager().beginTransaction().add(R.id.map,fragment).commit();
        }
}

但不幸的是，当我在模拟器中运行应用程序时，我仍然在 log cat 中收到错误：Error inflating class fragment and com.google.android.gms.maps.MapFragment: make sure class name exists, is public, and has a empty constructor that是公开的。编辑：这是我的日志猫：

05-26 13:52:25.457: E/AndroidRuntime(289): FATAL EXCEPTION: main
05-26 13:52:25.457: E/AndroidRuntime(289): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.com.vogella.android.locationapi.maps/com.vogella.android.locationapi.maps.ShowMapActivity}: android.view.InflateException: Binary XML file line #6: Error inflating class fragment
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.os.Looper.loop(Looper.java:123)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.app.ActivityThread.main(ActivityThread.java:3683)
05-26 13:52:25.457: E/AndroidRuntime(289):  at java.lang.reflect.Method.invokeNative(Native Method)
05-26 13:52:25.457: E/AndroidRuntime(289):  at java.lang.reflect.Method.invoke(Method.java:507)
05-26 13:52:25.457: E/AndroidRuntime(289):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
05-26 13:52:25.457: E/AndroidRuntime(289):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
05-26 13:52:25.457: E/AndroidRuntime(289):  at dalvik.system.NativeStart.main(Native Method)
05-26 13:52:25.457: E/AndroidRuntime(289): Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class fragment
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:587)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
05-26 13:52:25.457: E/AndroidRuntime(289):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.app.Activity.setContentView(Activity.java:1657)
05-26 13:52:25.457: E/AndroidRuntime(289):  at com.vogella.android.locationapi.maps.ShowMapActivity.onCreate(ShowMapActivity.java:22)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-26 13:52:25.457: E/AndroidRuntime(289):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
05-26 13:52:25.457: E/AndroidRuntime(289):  ... 11 more
05-26 13:52:25.457: E/AndroidRuntime(289): Caused by: android.support.v4.app.Fragment$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

那么我该如何解决它。我遗漏了哪些步骤或做错了
谢谢你的帮助，对不起大家，因为我的英语写作能力很差

4

2 回答 2

0

如果您没有找到解决方案，请确保应加载 SupportMapFragment 的活动扩展 android.support.v4.app.FragmentActivity

于 2013-05-31T01:21:16.070 回答
0

我曾经遇到过完全相同的问题。问题与...库的文件路径太长有关。

似乎 google-play-services_lib 有时在文件夹结构中嵌套得太深。尝试将其复制到其他位置。

于 2013-05-26T08:11:04.230 回答