"Android" uses Mediarecorder to realize recording intercom function

Source: Internet
Author: User

See QQ, have intercom function, how tall on ah, we also come to get a look effect.





That's the effect! Then post the code:

Package Cn.com.zte.uc.ui;import Java.io.ioexception;import Java.util.timer;import java.util.timertask;import Android.app.dialog;import Android.content.context;import Android.media.mediarecorder;import Android.os.Handler; Import Android.view.view;import Android.widget.textview;import Cn.com.zte.uc.r;import Cn.com.zte.uc.utils.mediautils;public class Recorderdialog extends Dialog {private static final long max_duration = 60000 ;p rivate static final long SECOND = 1000;private TextView tv;private View v;private Timer time;private mytimertask TASK;PR Ivate mediarecorder recorder;private long duration;private int[] values = {r.drawable.bg_recorder_value_0, R.drawable.bg_recorder_value_1,r.drawable.bg_recorder_value_2, R.drawable.bg_recorder_value_3, R.drawable.bg_ Recorder_value_4,r.drawable.bg_recorder_value_5, R.drawable.bg_recorder_value_6, R.drawable.bg_recorder_value_7, R.drawable.bg_recorder_value_8};p ublic Recorderdialog (context context) {Super (context, r.style.style_dialog); SetcontentvieW (r.layout.dlg_recorder); time = new Timer (), TV = (TextView) Findviewbyid (r.id.tv_duration); v = Findviewbyid (R.id.ll_ REC);} public void Show (String path) {tv.settext ("60\"); setduration (0); recorder = mediautils.getrecorder (path); try { Recorder.prepare (); Recorder.start ();} catch (IllegalStateException e) {e.printstacktrace ();} catch (IOException e) {e.printstacktrace ();} task = new Mytimertask (); Time.schedule (task, SECOND); Super.show ();} public void Show () {} @Overridepublic void dismiss () {if (!isshowing ()) {return;} Super.dismiss (); Try{task.cancel (); Recorder.stop (); Recorder.release ();} catch (Exception e) {e.printstacktrace ();}} public int getduration () {return (int) (duration/second);} public void setduration (int duration) {this.duration = Duration * SECOND;} Class Mytimertask extends TimerTask {@Overridepublic void run () {int ratio = Recorder.getmaxamplitude ()/600;int db = 0;/ /decibels can also be understood as defined volume size if (ratio > 1) db = (int) (MATH.LOG10 (ratio));//db is the value of the volume we need to get. (int) (* math.log10(ratio)) The amplitude and volume size of the formula//base the value obtained by your own test, how do I get this worth? Turn on the microphone and don't speak to the microphone, while the value from the ambient noise is around 300 to 600 I got the benchmark value of 600. Handler.sendemptymessage (DB/5);}} Handler Handler = new Handler () {public void Handlemessage (Android.os.Message msg) {if (msg.what >= values.length) {msg. what = values.length-1;} V.setbackgroundresource (Values[msg.what]); if (duration = = max_duration) {dismiss ();} else {duration + = 100;} System.out.println (duration); Tv.settext ((max_duration-duration)/second + "\" ");};};

There is also a tool class:

/* Media related tools * Sealed Chen Yu */package cn.com.zte.uc.utils;import java.io.bytearrayoutputstream;import java.io.file;import Java.io.fileinputstream;import Java.io.filenotfoundexception;import Java.io.ioexception;import Java.io.randomaccessfile;import Android.media.mediarecorder;import Android.util.log;import Cn.com.zte.uc.constant.constants;public class Mediautils {/** * Get a Mediarecorder object, output AMR file to path * * @param path * @retur n */public Static Mediarecorder Getrecorder (String path) {Mediarecorder recorder = new Mediarecorder (); File File = new file (Constants.sdcard_path + "RECORD" + file.separator), if (!file.exists ()) {file.mkdirs ();} File = new file (path), if (File.exists ()) {File.delete ();} try {file.createnewfile ();} catch (IOException e) {log.e ("recorder", "Create new Mediarecorder file error!");} Recorder.setaudiosource (MediaRecorder.AudioSource.MIC); Source of Recorded Sound Recorder.setoutputformat (MediaRecorder.OutputFormat.RAW_AMR); Recorder.setaudioencoder ( MediaRecorder.AudioEncoder.AMR_NB); recorder.seToutputfile (File.getabsolutepath ()); recorder.setaudiosamplingrate (8000); Recorder.setaudioencodingbitrate (16); return recorder;} /** * Use the recording on the SD card * * @throws FileNotFoundException * */public static byte[] Loadsdcardrecordfile (String path) throws Filen otfoundexception {if (stringutils.isempty (path)) {return null;} byte[] img = NULL; File File = new file (path), if (File.exists ()) {byte[] temp = new byte[4096]; FileInputStream fos = null;  Bytearrayoutputstream out = null;try {fos = new FileInputStream (file), out = new Bytearrayoutputstream (); int size = 0;while (size = Fos.read (temp))! =-1) {out.write (temp, 0, size);} img = Out.tobytearray ();} catch (Exception e) {log.e ("recorder", "io error!"),} finally {try {if (fos! = null) {Fos.close ();} if (out! = null) {Out.close ();}} catch (IOException e) {log.e ("recorder", "io error!");}}} return img;} /** * Time to get AMR file * @param file * @return * @throws ioexception */public static long getamrduration (String path) throws IOE xception {File File = new file (path);Long Duration = -1;int[] Packedsize = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0}; Randomaccessfile Randomaccessfile = null;try {randomaccessfile = new Randomaccessfile (file, "RW"); Long length = File.leng th ();//File length int pos = 6;//set initial position int framecount = 0;//initial frame number int packedpos = -1;byte[] Datas = new byte[1];//initial data value while (p Os <= length) {Randomaccessfile.seek (POS); if (Randomaccessfile.read (datas, 0, 1)! = 1) {duration = length > 0? ((length-6)/650): 0;break;} Packedpos = (Datas[0] >> 3) & 0x0f;pos + Packedsize[packedpos] + 1;framecount++;} Duration + = Framecount * 20;//frame number *20} finally {if (randomaccessfile! = null) {Randomaccessfile.close ();}} return duration;}}

Good two of the most critical classes come up, and then how to call it?

@Overridepublic boolean OnTouch (View V, motionevent event) {switch (event.getaction ()) {case Motionevent.action_down: Recordpath = Constants.cache_sdcard_path + system.currenttimemillis () + ". Amr";d lg.show (Recordpath); break;case MotionEvent.ACTION_UP:dlg.dismiss (); break;} return false;}

The DLG is a recording dialog box defined above:

Private Recorderdialog Dlg; Recording dialog Box DLG = new Recorderdialog (this); Instantiating in activity


One of the r.drawable.bg_recorder_value_xxxx is a series of pictures that change in the sound of a picture.


Recording completion will generate an. amr file under Recordpath and send it out.


Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.