java.lang.NullPointerException
at com.baidu.voicerecognition.android.w$1.onCompletion(Unknown Source)
at android.media.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:2383)
at android.os.Handler.dispatchMessage(Handler.java:110)
at android.os.Looper.loop(Looper.java:229)
at android.app.ActivityThread.main(ActivityThread.java:5493)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:676)
at dalvik.system.NativeStart.main(Native Method)

请问这里的错误可能是什么原因造成的？麻烦了