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                        /Android-仿微信語音聊天

前面都沒有問題了，整合錄音的時候出了點小問題，長按后松開閃屏，提示下面的錯誤

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)