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我从 (git clone git://git.linphone.org/linphone-android.git --recursive) git responsitory 下载了代码，并按照下载的源代码中的 readme.txt 文件进行操作。我按照自述文件中的说明安装了自动工具并在我的项目上运行 make 命令，但由于我的电脑不是 64 位电脑而错过了一点。重点是 ：

    On 64 bits linux systems you'll need the ia32-libs package
    With the latest Debian (multiarch), you need this:
    dpkg --add-architecture i386
    aptitude update
    aptitude install libstdc++6:i386 libgcc1:i386 zlib1g:i386 libncurses5:i386

因此，按照所有说明操作后，我成功构建了项目并成功清理它并在控制台上收到消息：

**** Build of configuration Default for project linphone-android ****

bash /home/redhat/chang_data/chandan/chandan/frommhs/ways/waysAndroid/ways/linphone-android/build_native.sh NDK_DEBUG=1 V=1 all 
bash: /home/redhat/chang_data/chandan/chandan/frommhs/ways/waysAndroid/ways/linphone-android/build_native.sh: No such file or directory

**** Build Finished ****

但是在那之后，当我运行我的项目时，它正在设备上运行，但在某一点上崩溃了，异常是：

06-19 21:01:41.563: E/AndroidRuntime(9550): FATAL EXCEPTION: main
06-19 21:01:41.563: E/AndroidRuntime(9550): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.linphone/org.linphone.LinphoneActivity}: java.lang.NullPointerException
06-19 21:01:41.563: E/AndroidRuntime(9550):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2343)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2395)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at android.app.ActivityThread.access$600(ActivityThread.java:162)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at android.os.Handler.dispatchMessage(Handler.java:107)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at android.os.Looper.loop(Looper.java:194)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at android.app.ActivityThread.main(ActivityThread.java:5392)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at java.lang.reflect.Method.invokeNative(Native Method)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at java.lang.reflect.Method.invoke(Method.java:525)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at dalvik.system.NativeStart.main(Native Method)
06-19 21:01:41.563: E/AndroidRuntime(9550): Caused by: java.lang.NullPointerException
06-19 21:01:41.563: E/AndroidRuntime(9550):     at org.linphone.LinphonePreferences.getConfig(LinphonePreferences.java:74)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at org.linphone.LinphonePreferences.isProvisioningLoginViewEnabled(LinphonePreferences.java:963)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at org.linphone.LinphoneActivity.onCreate(LinphoneActivity.java:145)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at android.app.Activity.performCreate(Activity.java:5122)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1081)
06-19 21:01:41.563: E/AndroidRuntime(9550):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2307)
06-19 21:01:41.563: E/AndroidRuntime(9550):     ... 11 more

我在 org.linphone.LinphonePreferences 类的这个方法中遇到了异常

public LpConfig getConfig() {
        LinphoneCore lc = getLc();
        if (lc != null)
            return lc.getConfig();

        return LinphoneCoreFactory.instance().createLpConfig(LinphoneManager.getInstance().mLinphoneConfigFile);
    }

这是因为 linphonecorefactory 实例不存在，因为实例方法找不到类“org.linphone.core.LinphoneCoreFactoryImpl”。

请告诉我如何解决这个问题。

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