LogCat问题

Question

我试图制作第一个应用程序，并制作了2个页面（LogoActivity（主要一个）和screen_2）。除了使用LogCat之外，我没有任何问题。我不知道那是什么。如果你能说出点什么，我很高兴学习:)。 这是我从Eclipse获得的日志文件。

05-15 21:04:04.981: D/AndroidRuntime(382): Shutting down VM 
05-15 21:04:04.981: W/dalvikvm(382): threadid=1: thread exiting with uncaught exception (group=0x40015560) 
05-15 21:04:05.001: E/AndroidRuntime(382): FATAL EXCEPTION: main  
05-15 21:04:05.001: E/AndroidRuntime(382): java.lang.RuntimeException: Unable to start activity ComponentInfo{eu.eyestudios.logo/eu.eyestudios.logo.LogoActivity}: java.lang.ClassCastException: android.widget.ImageButton 
05-15 21:04:05.001: E/AndroidRuntime(382): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 
05-15 21:04:05.001: E/AndroidRuntime(382): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
05-15 21:04:05.001: E/AndroidRuntime(382): at android.app.ActivityThread.access$1500(ActivityThread.java:117)  
05-15 21:04:05.001: E/AndroidRuntime(382): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 
05-15 21:04:05.001: E/AndroidRuntime(382): at android.os.Handler.dispatchMessage(Handler.java:99) 
05-15 21:04:05.001: E/AndroidRuntime(382): at android.os.Looper.loop(Looper.java:123) 
05-15 21:04:05.001: E/AndroidRuntime(382): at android.app.ActivityThread.main(ActivityThread.java:3683) 
05-15 21:04:05.001: E/AndroidRuntime(382): at java.lang.reflect.Method.invokeNative(Native Method) 
05-15 21:04:05.001: E/AndroidRuntime(382): at java.lang.reflect.Method.invoke(Method.java:507) 
05-15 21:04:05.001: E/AndroidRuntime(382): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
05-15 21:04:05.001: E/AndroidRuntime(382): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
05-15 21:04:05.001: E/AndroidRuntime(382): at dalvik.system.NativeStart.main(Native Method) 
05-15 21:04:05.001: E/AndroidRuntime(382): Caused by: java.lang.ClassCastException: android.widget.ImageButton 
05-15 21:04:05.001: E/AndroidRuntime(382): at eu.eyestudios.logo.LogoActivity.onCreate(LogoActivity.java:14) 
05-15 21:04:05.001: E/AndroidRuntime(382): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
05-15 21:04:05.001: E/AndroidRuntime(382): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 
05-15 21:04:05.001: E/AndroidRuntime(382): ... 11 more 

非常感谢！ :)

Answer 1

这些线

05-15 21：04：05.001：E/AndroidRuntime（382）：java.lang.ClassCastException：致android.widget.ImageButton

05- 15 21：04：05.001：E/AndroidRuntime（382）：在eu.eyestudios.logo.LogoActivity.onCreate（LogoActivity.java:14）

告诉你，你正在尝试做一个无效的投类型。查看LogoActivity.java:14附近的代码，以确定您的演员出现了什么问题。

Answer 2

The problem is in the imagebutton: 

05-15 21:04:05.001: E/AndroidRuntime(382): Caused by: java.lang.ClassCastException: android.widget.ImageButton 

I think you have not find image button by findviewbyid or you are taking wrong id for image button.like (ImageButton)findViewById(R.Id.***imagebutton**)..Check this id matches with image button id in xml.