Android Using tape recorder

Main code:

package com.shao.mediarecord;import java.io.file;import java.io.ioexception;import  android.app.activity;import android.media.mediarecorder;import android.os.bundle;import  Android.os.environment;import android.view.view;import android.view.view.onclicklistener;import  android.widget.button;import android.widget.toast;public class mainactivity extends  Activity {public Button btnStartMedia = null;public Button  btnstopmedia = null;public mediarecorder mediarecorder = null;private  Onclicklistener onclicklistener = new onclicklistener ()  {@Overridepublic  void  onclick (view v)  {switch (V.getid ())  {case r.id.btnstartmedia:startmediarecord (); break ; Case r.id.btnstopmedia:stopmediarecord (); break;default:break;}}; @Overrideprotected  void oncreate (bundle savedinstancestate)  {super.OnCreate (savedinstancestate); Setcontentview (R.layout.activity_main);this.btnstartmedia =  (Button)  findviewbyid (R.id.btnstartmedia);this.btnstopmedia =  (Button)  findviewbyid ( R.id.btnstopmedia); This.btnStartMedia.setOnClickListener (Onclicklistener); This.btnStopMedia.setOnClickListener (Onclicklistener);} Public void startmediarecord ()  {if (mediarecorder!=null)  {toast.maketext (this,  "ERR",  toast.length_long). Show (); return ;} Mediarecorder = new mediarecorder (); Mediarecorder.setaudiosource (MediaRecorder.AudioSource.MIC) ; Mediarecorder.setoutputformat (MediaRecorder.OutputFormat.AMR_WB); Mediarecorder.setaudioencoder ( MediaRecorder.AudioEncoder.AMR_WB); File file = new file (Environment.getexternalstoragedirectory (),  "Bianbian"); File.exists ())  {file.mkdirs ();} File filepath = new file (File, system.currenttimemillis () + ". Amr"); if (filePath!=null)  {try {filepAth.createnewfile ();}  catch  (ioexception e)  {e.printstacktrace ();}} Mediarecorder.setoutputfile (Filepath.getabsolutepath ()); Try {mediarecorder.prepare (); MediaRecorder.start ( );}  catch  (illegalstateexception e)  {e.printstacktrace ();}  catch  (ioexception e)  {e.printstacktrace ();}} Public void stopmediarecord ()  {this.mediarecorder.stop (); This.mediaRecorder.release (); This.mediarecorder = null;}}

Description: Open app appears two buttons, one starts recording, one stops recording. After clicking Start Recording, speak and be able to output the sound to a file.

Implementation Introduction:

Start playing the sound, mainly used in the Mediarecorder class, you can see that this class can be directly instantiated. Setaudiosource is to set the sound source, Setoutputformat is to set the output file format, Setaudioencoder is to set the sound encoding.

Mediarecorder = new Mediarecorder (); Mediarecorder.setaudiosource (MediaRecorder.AudioSource.MIC); Mediarecorder.setoutputformat (MediaRecorder.OutputFormat.AMR_WB); Mediarecorder.setaudioencoder ( MediaRecorder.AudioEncoder.AMR_WB);

Then set the output file and path, call the start playback method.

Mediarecorder.setoutputfile (Filepath.getabsolutepath ()); Mediarecorder.prepare (); Mediarecorder.start ();

Attach the layout configuration file

<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"     xmlns: tools= "Http://schemas.android.com/tools"     android:layout_width= "Match_parent"      android:layout_height= "Match_parent"     tools:context= " Com.shao.mediarecord.MainActivity "    android:orientation=" vertical " >     <button        android:id= "@+id/btnStartMedia"          android:layout_width= "Fill_parent"          android:layout_height= "Wrap_content"         android: text= "Start Recording"  />    <Button         Android:id= "@+id/btnstopmedia"         android:layout_width= "Fill_ Parent "        android:layout_height= "Wrap_content"         android:text= "Stop Recording"  /></LinearLayout>

The best thing to say is to read the device and store the file. To add the appropriate permissions.

<uses-permission android:name= "Android.permission.RECORD_AUDIO"/><uses-permission android:name= " Android.permission.READ_EXTERNAL_STORAGE "/><uses-permission android:name=" android.permission.WRITE_ External_storage "/>

Android Using tape recorder