About the Android-support-v4.jar package error

1. add android-support-v4 error Java.lang.ClassNotFoundException:android.support.v4.view.ViewPager In Loade

problem: after using Viewpager to add Android-support-v4.jar after the demo sample such as the following error

11-15 21:01:21.725:e/androidruntime (32431): caused by:java.lang.ClassNotFoundException: Android.support.v4.view.ViewPager in Loader dalvik.system.pathclassloader[/system/framework/ COM.GOOGLE.ANDROID.MAPS.JAR:/MNT/ASEC/COM.TRINEA.ANDROID.DEMO-2/PKG.APK]

The complete error is

I joined the Android-support-v4.jar package through the Add External jars, Java Build Path, Project---Properties. To solve the jar that requires only the Java Build Path----Properties----Copy the jar package directly to the project's Libs folder. Because the jar package under Project Libs will import the project on its own initiative. Manual import is not required. The packages that you actively import are present in the Android private folder.

21:01:21.725:e/androidruntime (32431): FATAL exception:main-15 21:01:21.725:e/androidruntime (32431): Java.lang.RuntimeException:Unable to start Activity componentinfo{com.trinea.android.demo/ Com.trinea.android.demo.ViewPagerDemo}: Android.view.InflateException:Binary XML file line #7: Error inflating class Android.support.v4.view.viewpager-15 21:01:21.725:e/androidruntime (32431): at Android.app.ActivityThread.performLaunchActivity (activitythread.java:1664) -15 21:01:21.725:e/androidruntime ( 32431): At Android.app.ActivityThread.handleLaunchActivity (activitythread.java:1680) -15 21:01:21.725:e/ Androidruntime (32431): at android.app.activitythread.access$1500 (activitythread.java:117) -15 21:01:21.725:e/ Androidruntime (32431): at Android.app.activitythread$h.handlemessage (activitythread.java:931) -15 21:01:21.725:e/ Androidruntime (32431): at Android.os.Handler.dispatchMessage (handler.java:99) -15 21:01:21.725:e/androidruntime ( 32431): at Android.os.Looper.loop (Looper.java:130) -15 21:01:21.725:e/androidruntime (32431): at Android.app.ActivityThread.main (Activitythread.java : 3703) -15 21:01:21.725:e/androidruntime (32431): at Java.lang.reflect.Method.invokeNative (Native Method)-15 21:01:21.725:e/androidruntime (32431): at Java.lang.reflect.Method.invoke (method.java:507) -15 21:01:21.725:e/ Androidruntime (32431): at Com.android.internal.os.zygoteinit$methodandargscaller.run (ZygoteInit.java:841)-15 21:01:21.725:e/androidruntime (32431): at Com.android.internal.os.ZygoteInit.main (zygoteinit.java:599)-15 21:01:21.725:e/androidruntime (32431): at Dalvik.system.NativeStart.main (Native Method) -15 21:01:21.725:e/ Androidruntime (32431): caused by:android.view.InflateException:Binary XML file line #7: Error inflating class android.su Pport.v4.view.viewpager-15 21:01:21.725:e/androidruntime (32431): at Android.view.LayoutInflater.createViewFromTag (layoutinflater.java:581) -15 21:01:21.725:e/androidruntime (32431): at ANDROID.VIew. Layoutinflater.rinflate (layoutinflater.java:623) -15 21:01:21.725:e/androidruntime (32431): at Android.view.LayoutInflater.inflate (layoutinflater.java:408) -15 21:01:21.725:e/androidruntime (32431): at Android.view.LayoutInflater.inflate (layoutinflater.java:320) -15 21:01:21.725:e/androidruntime (32431): at Android.view.LayoutInflater.inflate (layoutinflater.java:276) -15 21:01:21.725:e/androidruntime (32431): at Com.android.internal.policy.impl.PhoneWindow.setContentView (phonewindow.java:212) -15 21:01:21.725:e/ Androidruntime (32431): at Android.app.Activity.setContentView (activity.java:1681) -15 21:01:21.725:e/ Androidruntime (32431): at Com.trinea.android.demo.ViewPagerDemo.onCreate (viewpagerdemo.java:28) -15 21:01:21.725:e /androidruntime (32431): at Android.app.Instrumentation.callActivityOnCreate (instrumentation.java:1047)-15 21:01:21.725:e/androidruntime (32431): at Android.app.ActivityThread.performLaunchActivity (Activitythread.java : 1628)-15 21:01:21.725:e/androidruntime (32431): ... More-15 21:01:21.725:e/androidruntime (32431): caused by:java.lang.ClassNotFoundException: Android.support.v4.view.ViewPager in Loader dalvik.system.pathclassloader[/system/framework/ Com.google.android.maps.jar:/mnt/asec/com.trinea.android.demo-2/pkg.apk]-15 21:01:21.725:e/androidruntime (32431     ): At Dalvik.system.PathClassLoader.findClass (pathclassloader.java:240) -15 21:01:21.725:e/androidruntime (32431): At Java.lang.ClassLoader.loadClass (classloader.java:551) -15 21:01:21.725:e/androidruntime (32431): at Java.lang.ClassLoader.loadClass (classloader.java:511) -15 21:01:21.725:e/androidruntime (32431): at Android.view.LayoutInflater.createView (layoutinflater.java:471) -15 21:01:21.725:e/androidruntime (32431): at Android.view.LayoutInflater.createViewFromTag (layoutinflater.java:570)

2.java.lang.classnotfoundexception:didn ' t find class "Android.support.v4.view.ViewPager" on path:/data/app/xxx.apk

Workaround: put the third party package (Android-support-v4.jar) in the project folder under the Libs, right-click the project selection: Build Path, use as source folder, OK.

The Add jar will then add the Android-support-v4.jar to it.

Summary: in the case of this problem, the solution is to import the jar package into the project folder, can be placed in the Android private, this is the ADT when loading the project itself in the active load, but also can directly add the jar to join in, Note the recurring problem with the package. This piece is not easy to say clearly, oneself according to the situation to solve.

Additional: Other methods that can be used

1. in the project's properties, in the Java Build path, tick the Android-support-v4.jar in the order and export.

2. Most simple right-click on the project on Android tools to select Fix Project Properties.

About the Android-support-v4.jar package error