如何让Felix Palmer的android-visualizer工作？

Question

我从Felix Palmer下载了“android-visualizer”的代码，我试图让它工作，但是我得到了下面粘贴的错误。我应该怎样才能使这个工作？

我的公司正在开发一个带有OpenGL 3D效果的Android可视化工具，如果可能，我们希望重用“android-visualizer”中的代码。

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01-02 10:06:41.282: D/dalvikvm(5376): Late-enabling CheckJNI 
01-02 10:06:41.306: I/dalvikvm(5376): Turning on JNI app bug workarounds for target SDK version 9... 
01-02 10:06:41.813: E/MediaPlayer(5376): Unable to to create media player 
01-02 10:06:41.915: D/MediaPlayer(5376): create failed: 
01-02 10:06:41.915: D/MediaPlayer(5376): java.io.IOException: setDataSourceFD failed.: status=0x80000000 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.media.MediaPlayer.setDataSource(Native Method) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.media.MediaPlayer.create(MediaPlayer.java:740) 
01-02 10:06:41.915: D/MediaPlayer(5376): at com.pheelicks.app.MainActivity.init(MainActivity.java:59) 
01-02 10:06:41.915: D/MediaPlayer(5376): at com.pheelicks.app.MainActivity.onResume(MainActivity.java:39) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1158) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.Activity.performResume(Activity.java:4539) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2448) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2486) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2000) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread.access$600(ActivityThread.java:128) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.os.Handler.dispatchMessage(Handler.java:99) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.os.Looper.loop(Looper.java:137) 
01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread.main(ActivityThread.java:4514) 
01-02 10:06:41.915: D/MediaPlayer(5376): at java.lang.reflect.Method.invokeNative(Native Method) 
01-02 10:06:41.915: D/MediaPlayer(5376): at java.lang.reflect.Method.invoke(Method.java:511) 
01-02 10:06:41.915: D/MediaPlayer(5376): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 
01-02 10:06:41.915: D/MediaPlayer(5376): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 
01-02 10:06:41.915: D/MediaPlayer(5376): at dalvik.system.NativeStart.main(Native Method) 
01-02 10:06:41.915: D/AndroidRuntime(5376): Shutting down VM 
01-02 10:06:41.915: W/dalvikvm(5376): threadid=1: thread exiting with uncaught exception (group=0x40bcf1f8) 
01-02 10:06:41.915: E/AndroidRuntime(5376): FATAL EXCEPTION: main 
01-02 10:06:41.915: E/AndroidRuntime(5376): java.lang.RuntimeException: Unable to resume activity {com.pheelicks.visualizer/com.pheelicks.app.MainActivity}: java.lang.NullPointerException 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2458) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2486) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2000) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.app.ActivityThread.access$600(ActivityThread.java:128) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.os.Handler.dispatchMessage(Handler.java:99) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.os.Looper.loop(Looper.java:137) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.app.ActivityThread.main(ActivityThread.java:4514) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at java.lang.reflect.Method.invoke(Method.java:511) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at dalvik.system.NativeStart.main(Native Method) 
01-02 10:06:41.915: E/AndroidRuntime(5376): Caused by: java.lang.NullPointerException 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at com.pheelicks.app.MainActivity.init(MainActivity.java:60) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at com.pheelicks.app.MainActivity.onResume(MainActivity.java:39) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1158) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.app.Activity.performResume(Activity.java:4539) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2448) 
01-02 10:06:41.915: E/AndroidRuntime(5376):  ... 12 more 

Answer 1

您可以使用费利克斯·帕尔默可视化简单地去除媒体播放器和链接到主输出流。只是消除对MediaPlayer的任何参考，并实例展示台为：

new Visualizer(0); 

这将用于测试目的呢，我猜。只需播放一些音乐，然后启动Visualizer应用程序。