在Android中嵌入Knopflerfish不起作用

Question

我正在尝试将Knopflerfish框架嵌入到android应用程序中，以便动态加载和卸载包。我遵循了这教程

我做的第一步是从这链接下载这，并将它添加到eclipse项目中的类路径中。

此外，下面是我的onCreate()方法：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);



    Map fwprops = new Hashtable(); //CHANGED
    // add any framework properties to fwprops
    FrameworkFactory ff = new FrameworkFactoryImpl();
    mFramework = ff.newFramework(fwprops);
    try {

        mFramework.init(); //ERROR HERE!!

    } catch (BundleException be) {
        // framework initialization failed

        Log.d(TAG, be.getStackTrace().toString());
    }



}

请注意，我更改了代码的一行，因为它显示了语法错误。

即：

Dictionary fwprops = new Hashtable();
to
Map fwprops = new Hashtable(); //CHANGED

句法错误：The method newFramework(Map) in the type FrameworkFactory is not applicable for the arguments (Dictionary)

现在，根据这帖子中的@ldx，“我为Knopflerfish提供更好的Android/Dalvik支持而提交的补丁已经被合并，所以修补和重新编译KF不再是必要的了：”

因此，我没有添加任何假设我的代码是足够的，就像现在一样。

当我运行这个应用程序时。我立即得到:屏幕上的Unfortunately, Knopflerfish_Android has stopped。

有人能帮忙吗？下面是LogCat：

08-04 18:25:35.233: E/Trace(7018): error opening trace file: No such file or directory (2)
08-04 18:25:36.793: D/AndroidRuntime(7018): Shutting down VM
08-04 18:25:36.793: W/dalvikvm(7018): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
08-04 18:25:36.813: E/AndroidRuntime(7018): FATAL EXCEPTION: main
08-04 18:25:36.813: E/AndroidRuntime(7018): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.knopflerfish_android/com.example.knopflerfish_android.MainActivity}: java.lang.RuntimeException: Failed to initialize storage org.knopflerfish.framework.bundlestorage.file.BundleStorageImpl
08-04 18:25:36.813: E/AndroidRuntime(7018):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at android.os.Looper.loop(Looper.java:137)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at android.app.ActivityThread.main(ActivityThread.java:5041)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at java.lang.reflect.Method.invokeNative(Native Method)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at java.lang.reflect.Method.invoke(Method.java:511)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at dalvik.system.NativeStart.main(Native Method)
08-04 18:25:36.813: E/AndroidRuntime(7018): Caused by: java.lang.RuntimeException: Failed to initialize storage org.knopflerfish.framework.bundlestorage.file.BundleStorageImpl
08-04 18:25:36.813: E/AndroidRuntime(7018):     at org.knopflerfish.framework.FrameworkContext.init(FrameworkContext.java:343)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at org.knopflerfish.framework.SystemBundle.doInit(SystemBundle.java:513)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at org.knopflerfish.framework.SystemBundle.init(SystemBundle.java:125)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at com.example.knopflerfish_android.MainActivity.onCreate(MainActivity.java:39)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at android.app.Activity.performCreate(Activity.java:5104)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
08-04 18:25:36.813: E/AndroidRuntime(7018):     ... 11 more
08-04 18:25:36.813: E/AndroidRuntime(7018): Caused by: java.lang.reflect.InvocationTargetException
08-04 18:25:36.813: E/AndroidRuntime(7018):     at java.lang.reflect.Constructor.constructNative(Native Method)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at org.knopflerfish.framework.FrameworkContext.init(FrameworkContext.java:341)
08-04 18:25:36.813: E/AndroidRuntime(7018):     ... 17 more
08-04 18:25:36.813: E/AndroidRuntime(7018): Caused by: java.lang.RuntimeException: Cannot create directory: /fwdir/bs
08-04 18:25:36.813: E/AndroidRuntime(7018):     at org.knopflerfish.framework.Util.getFileStorage(Util.java:99)
08-04 18:25:36.813: E/AndroidRuntime(7018):     at org.knopflerfish.framework.bundlestorage.file.BundleStorageImpl.<init>(BundleStorageImpl.java:127)
08-04 18:25:36.813: E/AndroidRuntime(7018):     ... 20 more
08-04 18:25:39.543: I/Process(7018): Sending signal. PID: 7018 SIG: 9

Answer 1

在注释// add any framework properties to fwprops中，我只需添加框架启动属性，指定框架使用的持久存储目录。因为它是Android，所以存储目录的默认值似乎不起作用。相反，我应该指定sdcard下的目录。因此，我增加了这一行：

 fwprops.put("org.osgi.framework.storage", "sdcard/fwdir");

下面是我更新的代码：

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Map<String, String> fwprops = new Hashtable<String, String>(); //CHANGED

        // add any framework properties to fwprops
        fwprops.put("org.osgi.framework.storage", "sdcard/fwdir");

        FrameworkFactory ff = new FrameworkFactoryImpl();
        mFramework = ff.newFramework(fwprops);

        try {

            mFramework.init(); //THIS WORKS NOW :P :P

        } catch (BundleException be) {
            // framework initialization failed

            Log.d(TAG, be.getStackTrace().toString());

        }

    }  

多亏了这两个链接：存储 http://www.knopflerfish.org/releases/current/docs/bundledoc/index.html?docpage=framework/index.html