在Android应用程序项目中的adt 20中添加外部jar [英] Adding external jar in adt 20 in android application projects

问题描述

07-06 10:32:07.244: E/dalvikvm(319): Could not find class 'org.AstroVed.Panchanga.Moment', referenced from method com.astroved.horawatch.HoraWatchActivity.onCreate
07-06 10:32:07.244: W/dalvikvm(319): VFY: unable to resolve new-instance 186 (Lorg/AstroVed/Panchanga/Moment;) in Lcom/astroved/horawatch/HoraWatchActivity;
07-06 10:32:07.254: D/dalvikvm(319): VFY: replacing opcode 0x22 at 0x000f
07-06 10:32:07.254: D/dalvikvm(319): VFY: dead code 0x0011-00f6 in Lcom/astroved/horawatch/HoraWatchActivity;.onCreate (Landroid/os/Bundle;)V
07-06 10:32:08.224: D/dalvikvm(319): GC_CONCURRENT freed 692K, 49% free 3439K/6727K, external 2022K/2137K, paused 4ms+4ms
07-06 10:32:08.953: D/AndroidRuntime(319): Shutting down VM
07-06 10:32:08.953: W/dalvikvm(319): threadid=1: thread exiting with uncaught exception (group=0x40015560)
07-06 10:32:08.963: E/AndroidRuntime(319): FATAL EXCEPTION: main
07-06 10:32:08.963: E/AndroidRuntime(319): java.lang.NoClassDefFoundError: org.AstroVed.Panchanga.Moment
07-06 10:32:08.963: E/AndroidRuntime(319):  at com.astroved.horawatch.HoraWatchActivity.onCreate(HoraWatchActivity.java:71)
07-06 10:32:08.963: E/AndroidRuntime(319):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-06 10:32:08.963: E/AndroidRuntime(319):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
07-06 10:32:08.963: E/AndroidRuntime(319):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
07-06 10:32:08.963: E/AndroidRuntime(319):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
07-06 10:32:08.963: E/AndroidRuntime(319):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
07-06 10:32:08.963: E/AndroidRuntime(319):  at android.os.Handler.dispatchMessage(Handler.java:99)
07-06 10:32:08.963: E/AndroidRuntime(319):  at android.os.Looper.loop(Looper.java:123)
07-06 10:32:08.963: E/AndroidRuntime(319):  at android.app.ActivityThread.main(ActivityThread.java:3683)
07-06 10:32:08.963: E/AndroidRuntime(319):  at java.lang.reflect.Method.invokeNative(Native Method)
07-06 10:32:08.963: E/AndroidRuntime(319):  at java.lang.reflect.Method.invoke(Method.java:507)
07-06 10:32:08.963: E/AndroidRuntime(319):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-06 10:32:08.963: E/AndroidRuntime(319):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-06 10:32:08.963: E/AndroidRuntime(319):  at dalvik.system.NativeStart.main(Native Method)

这是我在adt 20中的应用程序中出现的错误.....如果我正在使用外部jar。

This is the error Iam getting in my apps in adt 20.....if i am using external jar.

推荐答案

您只会遇到以下几个原因：

There are only a few reasons you will ever get this error:

1. 该课程确实不存在。如果您正在使用官方示例中的代码并获取此代码，请确保您拥有该库的最新版本


2. 您尚未将jar添加到构建路径中。要解决此问题，请右键单击Eclipse中的jar，然后执行Build Path►Addto Build Path。


3. 您的jar不在/ libs文件夹中。将jar添加到构建路径时会发生这种情况，但较新版本的ADT需要将它放在/ libs中。把它放在那里并重新添加到构建路径。


4. 你的JAR文件必须与Android兼容（不支持实际的Java 7编译类！）。

1. The class genuinely doesn't exist. If you are using code from an official example and getting this, make sure you have the latest build of the library
2. You have not added the jar to your build path. To fix this, right click on the jar in Eclipse, and do Build Path ► Add to Build Path.
3. Your jar is not in the /libs folder. This happens when you have added the jar to the build path, but newer versions of ADT need it to be in /libs. Put it there and re-add it to the build path.
4. Your JAR file must be build compatible for Android (actual Java 7 compiled classes are not supported!).

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