Android's Audiorecord recording implementation

Objective:

In fact, recording in Android can be recorded with Mediarecord, the operation is relatively simple. However, the audio cannot be processed. Consider that the project is done in real-time voice can only select Audiorecord for recording.

This article is a review of Audiorecord:

 Public classAudiorecordmanager { Public Static FinalString TAG = "Audiorecordmanager"; PrivateAudiorecord Mrecorder; PrivateDataOutputStream dos; PrivateThread Recordthread; Private BooleanIsstart =false; Private StaticAudiorecordmanager minstance; Private  intbuffersize;  PublicAudiorecordmanager () {buffersize= Audiorecord.getminbuffersize (8000, Audioformat.channel_in_mono, audioformat.encoding_pcm_16bit); Mrecorder=NewAudiorecord (audiosource.mic, 8000, Audioformat.channel_in_mono, Audioformat.encoding_pcm_16bit, BufferSize * 2); }    /*** Get a singleton reference * *@return     */     Public StaticAudiorecordmanager getinstance () {if(Minstance = =NULL) {            synchronized(Audiorecordmanager.class) {                if(Minstance = =NULL) {minstance=NewAudiorecordmanager (); }            }        }        returnminstance; }    /*** Destroying threading methods*/    Private voidDestroythread () {Try{Isstart=false; if(NULL! = Recordthread && Thread.State.RUNNABLE = =recordthread.getstate ()) {                Try{Thread.Sleep (500);                Recordthread.interrupt (); } Catch(Exception e) {recordthread=NULL; }} recordthread=NULL; } Catch(Exception e) {e.printstacktrace (); } finally{Recordthread=NULL; }    }    /*** Start the recording thread*/    Private voidStartthread () {destroythread (); Isstart=true; if(Recordthread = =NULL) {Recordthread=NewThread (recordrunnable);        Recordthread.start (); }    }    /*** Recording Thread*/Runnable recordrunnable=NewRunnable () {@Override Public voidrun () {Try{android.os.Process.setThreadPriority (Android.os.Process.THREAD_PRIORITY_URGENT_AUDIO); intBytesrecord; //int buffersize =;                byte[] Tempbuffer =New byte[buffersize]; if(Mrecorder.getstate ()! =audiorecord.state_initialized)                    {Stoprecord (); return;                } mrecorder.startrecording (); //Writetofilehead ();                 while(Isstart) {if(NULL!=Mrecorder) {Bytesrecord= Mrecorder.read (tempbuffer, 0, buffersize); if(Bytesrecord = = Audiorecord.error_invalid_operation | | bytesrecord = =audiorecord.error_bad_value) {                            Continue; }                        if(Bytesrecord! = 0 && Bytesrecord! =-1) {                            //in this case, the recorded audio data can be processed two times such as voice changer, compression, noise reduction, gain and other operations//we directly write the PCM audio raw data to the file here can be sent directly to the server each other using Audiotrack to play the original dataDos.write (tempbuffer, 0, Bytesrecord); } Else {                             Break; }                    }                }            } Catch(Exception e) {e.printstacktrace ();    }        }    }; /*** Save File * *@paramPath *@throwsException*/    Private voidSetPath (String Path)throwsException {File file=NewFile (path); if(File.exists ()) {file.delete ();        } file.createnewfile (); DOS=NewDataOutputStream (NewFileOutputStream (file,true)); }    /*** Start Recording * *@paramPath*/     Public voidStartrecord (String path) {Try{setpath (path);        Startthread (); } Catch(Exception e) {e.printstacktrace (); }    }    /*** Stop Recording*/     Public voidStoprecord () {Try{destroythread (); if(Mrecorder! =NULL) {                if(mrecorder.getstate () = =audiorecord.state_initialized)                {mrecorder.stop (); }                if(Mrecorder! =NULL) {mrecorder.release (); }            }        if(Dos! =NULL) {Dos.flush ();        Dos.close (); }        } Catch(Exception e) {e.printstacktrace (); }    }}

Android's Audiorecord recording implementation