Javax.comm错误

Question

我正在尝试写一个Android应用程序，我可以从通信端口读取。我正在学习本教程：http://www.java-samples.com/showtutorial.php?tutorialid=11

所以，我对它做了一点修改，去掉了main方法，并用一个来自安卓活动的OnCreate替换了它，但这就是我得到奇怪错误的地方，我不明白。有人能告诉我哪里有错误吗？

以下是错误日志：

04-04 02:26:43.426: E/AndroidRuntime(1418): FATAL EXCEPTION: main
04-04 02:26:43.426: E/AndroidRuntime(1418): java.lang.NoClassDefFoundError: javax.comm.CommPortIdentifier
04-04 02:26:43.426: E/AndroidRuntime(1418):     at com.example.jovialjavauart.Reader.onCreate(Reader.java:27)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at android.app.Activity.performCreate(Activity.java:5104)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at android.os.Looper.loop(Looper.java:137)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at android.app.ActivityThread.main(ActivityThread.java:5039)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at java.lang.reflect.Method.invokeNative(Native Method)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at java.lang.reflect.Method.invoke(Method.java:511)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-04 02:26:43.426: E/AndroidRuntime(1418):     at dalvik.system.NativeStart.main(Native Method)

谢谢您:)

Answer 1

javax.comm不是一个Android包，也不能移植到Dalvik字节码。你是索尔。

http://developer.android.com/reference/packages.html