编写好的Android程序,运行后,点击控件按钮,弹出sorr框,看报错好像是少了什么驱动的意思,该怎么弄???
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07-11 02:26:10.594: ERROR/AndroidRuntime(338): FATAL EXCEPTION: main
07-11 02:26:10.594: ERROR/AndroidRuntime(338): java.lang.RuntimeException: Unable to start activity ComponentInfo{mars.act/mars.act.jsq}: java.lang.NullPointerException
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at android.os.Handler.dispatchMessage(Handler.java:99)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at android.os.Looper.loop(Looper.java:123)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at android.app.ActivityThread.main(ActivityThread.java:4627)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at java.lang.reflect.Method.invokeNative(Native Method)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at java.lang.reflect.Method.invoke(Method.java:521)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at dalvik.system.NativeStart.main(Native Method)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): Caused by: java.lang.NullPointerException
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at mars.act.jsq.onCreate(jsq.java:29)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
07-11 02:26:10.594: ERROR/AndroidRuntime(338): ... 11 more