使用viewpager時的ClassNotfoundexception

Question

我正在嘗試實現Viewpager，我添加了支持所需的外部jar。但是，當我啓動應用程序時，我正在接近部隊。以下是日誌。

07-20 18:48:00.578: W/dalvikvm(21560): threadid=1: thread exiting with uncaught exception (group=0x40019740) 
07-20 18:48:00.578: E/AndroidRuntime(21560): FATAL EXCEPTION: main 
07-20 18:48:00.578: E/AndroidRuntime(21560): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.SimpleViewPager/com.example.SimpleViewPager.SimpleViewPagerActivity}: android.view.InflateException: Binary XML file line #6: Error inflating class android.support.v4.view.ViewPager 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1668) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1684) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.os.Handler.dispatchMessage(Handler.java:99) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.os.Looper.loop(Looper.java:130) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.app.ActivityThread.main(ActivityThread.java:3750) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at java.lang.reflect.Method.invokeNative(Native Method) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at java.lang.reflect.Method.invoke(Method.java:507) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:861) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:619) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at dalvik.system.NativeStart.main(Native Method) 
07-20 18:48:00.578: E/AndroidRuntime(21560): Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class android.support.v4.view.ViewPager 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:581) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.view.LayoutInflater.rInflate(LayoutInflater.java:623) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.view.LayoutInflater.inflate(LayoutInflater.java:408) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:224) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.app.Activity.setContentView(Activity.java:1769) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at com.example.SimpleViewPager.SimpleViewPagerActivity.onCreate(SimpleViewPagerActivity.java:18) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1632) 
07-20 18:48:00.578: E/AndroidRuntime(21560): ... 11 more 
07-20 18:48:00.578: E/AndroidRuntime(21560): Caused by: java.lang.ClassNotFoundException: android.support.v4.view.ViewPager in loader dalvik.system.PathClassLoader[/data/app/com.example.SimpleViewPager-1.apk] 
07-20 18:48:00.578: E/AndroidRuntime(21560): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at java.lang.ClassLoader.loadClass(ClassLoader.java:551) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.view.LayoutInflater.createView(LayoutInflater.java:471) 
07-20 18:48:00.578: E/AndroidRuntime(21560): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570) 
07-20 18:48:00.578: E/AndroidRuntime(21560): ... 20 more 
07-20 18:48:00.585: D/KeyguardViewMediator(213): setHidden false` 

Answer 1

在您的應用程序包層次結構中創建一個libs目錄。

它把外部jar文件，

然後Right Click on jar file -> Add to Build Path ..

清潔您的項目，然後再次運行..