ضبط صدا (Audio Capture) در اندروید

MediaRecorder myAudioRecorder = new MediaRecorder();

myAudioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myAudioRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
myAudioRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB); 
myAudioRecorder.setOutputFile(outputFile);

myAudioRecorder.prepare();
myAudioRecorder.start();

package com.example.sairamkrishna.myapplication;

import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaRecorder;

import android.os.Bundle;
import android.os.Environment;

import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;

import android.widget.ImageView;
import android.widget.Toast;
import java.io.IOException;


public class MainActivity extends Activity {
   Button play,stop,record;
   private MediaRecorder myAudioRecorder;
   private String outputFile = null;
   
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      
      play=(Button)findViewById(R.id.button3);
      stop=(Button)findViewById(R.id.button2);
      record=(Button)findViewById(R.id.button);
      
      stop.setEnabled(false);
      play.setEnabled(false);
      outputFile = Environment.getExternalStorageDirectory().getAbsolutePath() + "/recording.3gp";;
      
      myAudioRecorder=new MediaRecorder();
      myAudioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
      myAudioRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
      myAudioRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
      myAudioRecorder.setOutputFile(outputFile);
      
      record.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            try {
               myAudioRecorder.prepare();
               myAudioRecorder.start();
            }
            
            catch (IllegalStateException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
            }
            
            catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
            }
            
            record.setEnabled(false);
            stop.setEnabled(true);
            
            Toast.makeText(getApplicationContext(), "Recording started", Toast.LENGTH_LONG).show();
         }
      });
      
      stop.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            myAudioRecorder.stop();
            myAudioRecorder.release();
            myAudioRecorder  = null;
            
            stop.setEnabled(false);
            play.setEnabled(true);
            
            Toast.makeText(getApplicationContext(), "Audio recorded successfully",Toast.LENGTH_LONG).show();
         }
      });
      
      play.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) throws IllegalArgumentException,SecurityException,IllegalStateException {
            MediaPlayer m = new MediaPlayer();
            
            try {
               m.setDataSource(outputFile);
            }
            
            catch (IOException e) {
               e.printStackTrace();
            }
            
            try {
               m.prepare();
            }
            
            catch (IOException e) {
               e.printStackTrace();
            }
            
            m.start();
            Toast.makeText(getApplicationContext(), "Playing audio", Toast.LENGTH_LONG).show();
         }
      });
   }
   
   @Override
   public boolean onCreateOptionsMenu(Menu menu) {
      // Inflate the menu; this adds items to the action bar if it is present.
      getMenuInflater().inflate(R.menu.menu_main, menu);
      return true;
   }
   
   @Override
   public boolean onOptionsItemSelected(MenuItem item) {
      // Handle action bar item clicks here. The action bar will
      // automatically handle clicks on the Home/Up button, so long
      // as you specify a parent activity in AndroidManifest.xml.
      
      int id = item.getItemId();
      
      //noinspection SimplifiableIfStatement
      if (id == R.id.action_settings) {
         return true;
      }
      return super.onOptionsItemSelected(item);
   }
}

<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" 
   android:paddingLeft="@dimen/activity_horizontal_margin"
   android:paddingRight="@dimen/activity_horizontal_margin"
   android:paddingTop="@dimen/activity_vertical_margin"
   android:paddingBottom="@dimen/activity_vertical_margin" 
   tools:context=".MainActivity">
   
   <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Android Audio Recording"
      android:id="@+id/textView"
      android:textSize="30dp"
      android:layout_alignParentTop="true"
      android:layout_alignParentRight="true"
      android:layout_alignParentEnd="true" />
      
   <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Tutorialspoint"
      android:id="@+id/textView2"
      android:textColor="#ff3eff0f"
      android:textSize="35dp"
      android:layout_below="@+id/textView"
      android:layout_centerHorizontal="true" />
      
   <ImageView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:id="@+id/imageView"
      android:src="@drawable/logo"
      android:layout_below="@+id/textView2"
      android:layout_alignLeft="@+id/textView2"
      android:layout_alignStart="@+id/textView2"
      android:layout_alignRight="@+id/textView2"
      android:layout_alignEnd="@+id/textView2" />
      
   <Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Record"
      android:id="@+id/button"
      android:layout_below="@+id/imageView"
      android:layout_alignParentLeft="true"
      android:layout_alignParentStart="true"
      android:layout_marginTop="59dp" />
      
   <Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Stop"
      android:id="@+id/button2"
      android:layout_alignTop="@+id/button"
      android:layout_centerHorizontal="true" />
      
   <Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="play"
      android:id="@+id/button3"
      android:layout_alignTop="@+id/button2"
      android:layout_alignRight="@+id/textView"
      android:layout_alignEnd="@+id/textView" />

</RelativeLayout>

<resources>
   <string name="app_name">My Application</string>
   <string name="hello_world">Hello world!</string>
   <string name="action_settings">Settings</string>
</resources>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.example.audiocapture"
   android:versionCode="1"
   android:versionName="1.0" >
   
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.RECORD_AUDIO" /> 

   <application
      android:allowBackup="true"
      android:icon="@drawable/ic_launcher"
      android:label="@string/app_name"
      android:theme="@style/AppTheme" >
      
      <activity
         android:name="com.example.audiocapture.MainActivity"
         android:label="@string/app_name" >
      
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      
      </activity>
      
   </application>
</manifest>