新增android-support-v4 錯誤 java.lang.ClassNotFoundException: android.support.v4.view.ViewPager in loade
阿新 • • 發佈：2019-01-05
在使用ViewPager新增android-support-v4.jar後提示如下錯誤
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]
完整錯誤為
完整錯誤 -15 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.support.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): ... 11 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)
我是通過專案 -> 屬性 -> Java Build Path -> Add External JARs添加了android-support-v4.jar包的，解決只需要專案 -> 屬性 -> Java Build Path -> Remove該jar，直接將jar包複製到專案的libs目錄下即可。因為專案libs下的jar包會自動匯入專案，不需要手動匯入。