android - 仍然错误 Android : Unable to start activity ComponentInfo{/com. } : android. view.InflateException: Binary XML file line Error inflating class fragment

Question

我使用 Google Maps Android v1 API 创建了我的应用程序的第一个版本。但是现在当我发布第二个版本的应用程序时，谷歌地图停止工作。我认为这是因为它已被弃用。

所以现在我正在尝试创建示例 Android 应用程序以使用此 link 来使用 Google map .

首先我尝试使用这个 code

但正如我建议将 SupportMapFragment 与 FragmentActivity 一起使用，我将 xml 代码更改为

<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <fragment
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginRight="150dp" />

</RelativeLayout>

并导入了 FragmentActivity 而不是 Activity，现在我遇到了错误

 FATAL EXCEPTION: main
 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.testmap/com.example.testmap.MainActivity}: android.view.InflateException: Binary XML file line #16: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
at android.app.ActivityThread.access$1500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)
 Caused by: android.view.InflateException: Binary XML file line #16: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:587)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
at    com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:209)
at android.app.Activity.setContentView(Activity.java:1657)
at com.example.testmap.MainActivity.onCreate(MainActivity.java:12)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
... 11 more
 Caused by: android.support.v4.app.Fragment$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
at android.support.v4.app.Fragment.instantiate(Fragment.java:401)
at android.support.v4.app.Fragment.instantiate(Fragment.java:369)
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:272)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
... 20 more
 Caused by: java.lang.ClassNotFoundException: com.google.android.gms.maps.SupportMapFragment in loader dalvik.system.PathClassLoader[/data/app/com.example.testmap-2.apk]
at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at android.support.v4.app.Fragment.instantiate(Fragment.java:391)

Answer 1

你需要一个 android:name="com.google.android.gms.maps.SupportMapFragment"在你的里面 <fragment>标签。

android:name 属性指定要在布局中实例化的 Fragment 类。

更新:

更新代码后，com.google.android.gms.maps.SupportMapFragment 会出现 ClassNotFoundException。

因此您还需要确保添加了引用库 google-play-services.jar。