04-26 16:01:54.783 10888-10888/com.example.qqclient E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.qqclient, PID: 10888
    java.lang.NullPointerException: Attempt to invoke virtual method 'int android.media.MediaRecorder.getMaxAmplitude()' on a null object reference
        at com.qq.View.AudioManager.getVoiceLevel(AudioManager.java:100)
        at com.qq.View.AudioRecorderButton$3.handleMessage(AudioRecorderButton.java:104)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5293)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)