Question

我用eclipse开发安卓，遇到这个问题，怎么办？怎么改？

12-05 19:59:22.322: ERROR/AndroidRuntime(348): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.tutor/com.android.tutor.ImagedemoActivity}: java.lang.NullPointerException
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at android.os.Handler.dispatchMessage(Handler.java:99)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at android.os.Looper.loop(Looper.java:123)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at java.lang.reflect.Method.invokeNative(Native Method)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at java.lang.reflect.Method.invoke(Method.java:521)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at dalvik.system.NativeStart.main(Native Method)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): Caused by: java.lang.NullPointerException
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at com.android.tutor.ImagedemoActivity.setupViews(ImagedemoActivity.java:36)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at com.android.tutor.ImagedemoActivity.onCreate(ImagedemoActivity.java:13)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-05 19:59:22.322: ERROR/AndroidRuntime(348): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)

Answer 1

空指针异常。
你双击android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
这一行提示。看哪一行代码上出异常了

Answer 2

ImagedemoActivity.java:36
ImagedemoActivity.java:13
这些相关的代码好好看一看

Answer 3

你双击android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
这一行提示。看哪一行代码上出异常

Answer 4

......