Android DrawerLayout 组件

Question

我在使用 DrawerLayout 组件时遇到一些问题。我正在使用 android-support-v4 jar，当我启动应用程序时出现此异常:

05-19 01:33:57.402: E/AndroidRuntime(3120): FATAL EXCEPTION: main
05-19 01:33:57.402: E/AndroidRuntime(3120): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dimosphere.app/com.dimosphere.app.MainActivity}: android.view.InflateException: Binary XML file line #1: Error inflating class android.support.v4.widget.DrawerLayout
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2307)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2357)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.app.ActivityThread.access$600(ActivityThread.java:153)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.os.Looper.loop(Looper.java:137)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.app.ActivityThread.main(ActivityThread.java:5226)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at java.lang.reflect.Method.invokeNative(Native Method)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at java.lang.reflect.Method.invoke(Method.java:511)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at dalvik.system.NativeStart.main(Native Method)
05-19 01:33:57.402: E/AndroidRuntime(3120): Caused by: android.view.InflateException: Binary XML file line #1: Error inflating class android.support.v4.widget.DrawerLayout
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:698)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:323)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.app.Activity.setContentView(Activity.java:1881)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at com.dimosphere.app.MainActivity.onCreate(MainActivity.java:12)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.app.Activity.performCreate(Activity.java:5104)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2261)
05-19 01:33:57.402: E/AndroidRuntime(3120):     ... 11 more
05-19 01:33:57.402: E/AndroidRuntime(3120): Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.widget.DrawerLayout" on path: /data/app/com.dimosphere.app-2.apk
05-19 01:33:57.402: E/AndroidRuntime(3120):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.view.LayoutInflater.createView(LayoutInflater.java:552)
05-19 01:33:57.402: E/AndroidRuntime(3120):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
05-19 01:33:57.402: E/AndroidRuntime(3120):     ... 20 more

我不明白为什么会出现这个异常，我在项目属性中包含了 jar...

这是我的 xml 文件:

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- The main content view -->
    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <!-- The navigation drawer -->
    <ListView android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="#111"/>

</android.support.v4.widget.DrawerLayout>

如果您对问题出在哪里有任何想法，欢迎您...谢谢:)

Answer 1

将 android-support-v4 添加到您的构建路径