Audio Recording in Android

Simple State Diagram for Media Recorder...


Here Sequence of Method call is as per state diagram of media Recorder .... Otherwise Invalid sate call Error will be Occur........
Steps:
1) Also her two permission add in Android manifest file


<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

2) This is java file coding 
audiorecording.java



package com.example.recording;

import java.io.File;
import java.io.FileDescriptor;

import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.support.v4.app.NavUtils;
/*
 *   O@K Tech....
 */
public class audiorecording extends Activity implements OnClickListener {
     Button start,stop,frmt;
 

private MediaRecorder rcorder = null;
     private int opfrmt[] = {MediaRecorder.OutputFormat.MPEG_4,MediaRecorder.OutputFormat.THREE_GPP};
     private int curfrmt = 0;
     private String filextsn[] = {".mp4",".3gp"};
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recording);
        start = (Button)findViewById(R.id.button1);
        stop = (Button)findViewById(R.id.button2);
        frmt = (Button)findViewById(R.id.button3);
        start.setOnClickListener(this);
        stop.setOnClickListener(this);
        frmt.setOnClickListener(this);
     
               
     
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_recording, menu);
        return true;
    }

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button1:
System.out.println("Recoding start");
startrecording();
break;
case R.id.button2:
System.out.println("Recoding stop");
stoprecording();
break;
case R.id.button3:
System.out.println("format check");
showDialog(1);

break;

default:
break;
}

}

private void stoprecording() {
System.out.println("stop recoding method");
if(rcorder != null)
{
rcorder.stop();
rcorder.reset();
rcorder.release();

rcorder = null;


}

}

private void startrecording() {
System.out.println("startrecoding method");
rcorder = new MediaRecorder();

rcorder.setAudioSource(MediaRecorder.AudioSource.MIC);

rcorder.setOutputFormat(opfrmt[curfrmt]);
rcorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
rcorder.setOutputFile(getfilepath());

try {
rcorder.prepare();
rcorder.start();
} catch (Exception e) {

}
}

private String getfilepath() {
System.out.println("getfile path method");
String filepath = Environment.getExternalStorageDirectory().getAbsolutePath();
File file = new File(filepath, "recodingfile");

if(!file.exists())
file.mkdir();



return(file.getAbsolutePath() + "/" + System.currentTimeMillis() + filextsn[curfrmt]);
}
@Override
protected Dialog onCreateDialog(int id) {
System.out.println("oncreate dialog");
AlertDialog.Builder albuilddlg = new AlertDialog.Builder(this);
String frmt[] = {"mp4","3gp"};
albuilddlg.setTitle("Select Format.....");
albuilddlg.setSingleChoiceItems(frmt, curfrmt, new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
curfrmt = which;

}
});



return albuilddlg.create();
}

 
}

3).Xml file


<RelativeLayout 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" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:text="Start" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_toRightOf="@+id/button1"
        android:text="Stop" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_toRightOf="@+id/button2"
        android:text="Change Format" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/button2"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="138dp"
        android:src="@drawable/audio" />

</RelativeLayout>

Download This Project click here....

out put of this porgram

All iz well

OAK Tech.......