我想上运行dalvikvm使用的这些说明。我以root身份运行，所以它不是一个权限问题。

下面是应用程序code：

 进口android.os.SystemClock;
/ **
 *命令发送键事件到设备上，或者通过它们的键code或由
 *所需的字符输出。
 * /
公共类MWE {
    公共静态无效的主要（字串[] args）{
        的System.out.println（SystemClock.uptimeMillis（））;
    }
}
 

当我运行这个在dalvikvm，我收到以下错误信息：

  java.lang.NoClassDefFoundError的：android.os.SystemClock
        在MWE.main（MWE.java:8）
        在dalvik.system.NativeStart.main（本机方法）
 

下面是我执行命令，该命令适用于上述应用程序的正常的Hello World版本。

  /系统/斌/ dalvikvm -Xbootclasspath：/system/framework/core.jar -classpath /data/local/tmp/MWE.jar MWE
 

我目前的结论是， android.os.SystemClock 不活在 core.jar添加。我曾推测尝试添加 framework.jar 和框架res.jar 为好，但我得到了同样的错误

/系统/框架根据该罐的持有类 android.os.SystemClock ？ 在一般情况下，有没有，有一类到罐子的Andr​​oid映射部署罐子的地方？ 解决方案

在我的设备（的HTC One M8）android.os.SystemClock是/system/framework/framework3.jar。我相信框架分成，因为对classes.dex的65K方法限制多罐。 android.os.SystemClock可能是在不同的瓶子不同的Andr​​oid设备。

我用

步骤来查找android.os.SystemClock位于：

 亚行拉/system/framework/<filename>.jar
 

我再反编译classes.dex到罐 DexToJar 并观看了使用的 JD-GUI （你可以只打开它作为一个ZIP文件，JD-GUI是没有必要的，仅限于Windows）

I am trying to run a simple command line java application on dalvikvm using the these instructions. I am running as root so it is not a permissions issue.

Here is the application code:

import android.os.SystemClock;
/**
 * Command that sends key events to the device, either by their keycode, or by
 * desired character output.
 */
public class MWE {
    public static void main(String[] args) {
        System.out.println(SystemClock.uptimeMillis());
    }
}

When I run this on dalvikvm, I get the following error message:

java.lang.NoClassDefFoundError: android.os.SystemClock
        at MWE.main(MWE.java:8)
        at dalvik.system.NativeStart.main(Native Method)

Here is the command that I run, which works for the normal Hello World version of the above application.

/system/bin/dalvikvm -Xbootclasspath:/system/framework/core.jar -classpath /data/local/tmp/MWE.jar MWE

My current conclusion is that android.os.SystemClock does not live inside core.jar. I have speculatively tried to add framework.jar and framework-res.jar as well, but I get the same error.

Which of the jars under /system/framework holds the class android.os.SystemClock? In general, is there a place that has a class-to-jar mapping for deployed jars in Android?

解决方案

On my device (HTC One M8) android.os.SystemClock is in /system/framework/framework3.jar. I believe framework is separated into multiple jars because of the 65k method limit on classes.dex. android.os.SystemClock may be in a different jar on different android devices.

Steps I used to find where android.os.SystemClock was located:

adb pull /system/framework/<filename>.jar

I then decompiled classes.dex to a jar with DexToJar and viewed the packages inside the jar using JD-GUI (you could just open it as a ZIP file, jd-gui is not necessary and for windows only)