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我有一个 OSGI Bundle，它是一个 Eclipse 插件项目。在这个包中，我尝试使用 android API 在 LogCat 上打印一条消息。在这两个问题1和2中引导我实现这一目标的方式是获得 Android API 的真正实现，并将其准备为单独的捆绑包导出android.util，以便我的捆绑包导入android.util并使用它。好的，我完成了所有这些步骤。我使用了这个android 源代码，下面是我的包的 Activator 类：

package bundle_androidapi;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;


import android.util.Log;

public class Activator implements BundleActivator {

    private static BundleContext context;

    static BundleContext getContext() {
        return context;
    }

    /*
     * (non-Javadoc)
     * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
     */
    public void start(BundleContext bundleContext) throws Exception {
        Activator.context = bundleContext;


        System.out.println("Hello World. I am the OSGI_Android_Bundle!");

        Log.d("Zaid Log", "Hello World. I am the OSGI_Android_Bundle!!");
    }

    /*
     * (non-Javadoc)
     * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
     */
    public void stop(BundleContext bundleContext) throws Exception {
        Activator.context = null;


        System.out.println("Goodbye World. I am the OSGI_Android_Bundle!");

        Log.d("Zaid Log", "Goodbye World. I am the OSGI_Android_Bundle!!");
    }

}

在使用 Log.d() 的行中，我收到以下错误：

!ENTRY Bundle_AndroidAPI 4 0 2013-08-14 15:10:53.638
!MESSAGE FrameworkEvent ERROR
!STACK 0
org.osgi.framework.BundleException: Exception in bundle_androidapi.Activator.start() of bundle Bundle_AndroidAPI.
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:734)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
    at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
    at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1177)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
    at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
Caused by: java.lang.UnsatisfiedLinkError: android.util.Log.println_native(IILjava/lang/String;Ljava/lang/String;)I
    at android.util.Log.println_native(Native Method)
    at android.util.Log.d(Log.java:138)
    at bundle_androidapi.Activator.start(Activator.java:27)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
    ... 12 more
Root exception:
java.lang.UnsatisfiedLinkError: android.util.Log.println_native(IILjava/lang/String;Ljava/lang/String;)I
    at android.util.Log.println_native(Native Method)
    at android.util.Log.d(Log.java:138)
    at bundle_androidapi.Activator.start(Activator.java:27)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
    at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
    at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1177)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
    at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)

有人可以告诉我如何摆脱上述错误。

下面是我的 MANIFEST.MF：

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Bundle_AndroidAPI
Bundle-SymbolicName: Bundle_AndroidAPI
Bundle-Version: 1.0.0.qualifier
Bundle-Activator: bundle_androidapi.Activator
Import-Package: org.osgi.framework;version="1.3.0", android.util
Bundle-RequiredExecutionEnvironment: JavaSE-1.6

注意：自 1 周以来，我一直在尝试让我的包使用 andorid API，但我一直失败。我的目标不仅仅是要打印的日志消息，而是让我的包成功使用 Android API，所以我是否遵循正确的方法？有什么原因，为什么我一直失败并收到这些错误？谢谢。

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1 回答 1

0

请阅读有关 UnsatisfiedLinkError 的 JavaDocs：“如果 Java 虚拟机找不到声明的方法的适当本机语言定义，则抛出该错误native。”

换句话说，println_native您的包中缺少该方法的本机实现。另外我注意到，如果存在的话，您没有Bundle-NativeCode使 OSGi 能够找到本机代码的标头。

更新

在评论线程中，我们甚至不应该尝试部署包含此 API 的包，因为该 API 已经由 Android 平台提供。所以上面的建议是没有意义的。

关于构建依赖与运行时依赖存在一些混淆。可以将其android.jar添加到项目构建依赖项中以编译捆绑包，但它在运行时不执行任何操作异常 throw "Stub!" 例外。但是这没关系，因为运行时不需要它。

于 2013-08-14T12:29:35.733 回答