Audio Recording Example in Android

ScreenShots:

strings.xml:

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">Audio Capture</string>

    <string name="action_settings">Settings</string>

    <string name="hello_world">Hello world!</string>

    <string name="startBtn">Start Recording</string>

    <string name="stopBtn">Stop Recording</string>

    <string name="playBtn">Play </string>

</resources>

activity_main.xml:

<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:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <Button

        android:id="@+id/button_startRecordBtn"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="24dp"

        android:text="@string/startBtn" />

    <Button

        android:id="@+id/button_stopRecordBtn"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/button_startRecordBtn"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="70dp"

        android:text="@string/stopBtn" />

    <Button

        android:id="@+id/button_playBtn"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/button_stopRecordBtn"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="55dp"

        android:text="@string/playBtn" />

</RelativeLayout>

MainActivity.java:

package com.ram.audiocapture;

import java.io.IOException;

import android.app.Activity;

import android.media.MediaPlayer;

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;

public class MainActivity extends Activity implements OnClickListener {

private Button startRecBtn, stopRecBtn, playBtn;

private MediaRecorder recorder = null;

String FILE_PATH_NAME = null;

private MediaPlayer m = null;

public MainActivity() {

FILE_PATH_NAME = Environment.getExternalStorageDirectory()

.getAbsolutePath();

FILE_PATH_NAME += "/recordsample.3gp";

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

startRecBtn = (Button) findViewById(R.id.button_startRecordBtn);

stopRecBtn = (Button) findViewById(R.id.button_stopRecordBtn);

playBtn = (Button) findViewById(R.id.button_playBtn);

startRecBtn.setOnClickListener(this);

stopRecBtn.setOnClickListener(this);

playBtn.setOnClickListener(this);

}

@Override

public void onClick(View v) {

switch (v.getId()) {

case R.id.button_startRecordBtn:

recorder = new MediaRecorder();

recorder.setAudioSource(MediaRecorder.AudioSource.MIC);

recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

recorder.setOutputFile(FILE_PATH_NAME);

try {

recorder.prepare();

} catch (IllegalStateException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

recorder.start();

break;

case R.id.button_stopRecordBtn:

recorder.stop();

recorder.reset();  

recorder.release();

recorder = null;

break;

case R.id.button_playBtn:

m = new MediaPlayer();

try {

m.setDataSource(FILE_PATH_NAME);

m.prepare();

} catch (IllegalArgumentException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (SecurityException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IllegalStateException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

m.start();

break;

}

}

@Override

protected void onPause() {

if (recorder != null) {

recorder.release();

recorder = null;

}

if (m != null) {

m.release();

m = null;

}

super.onPause();

}

}

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.ram.audiocapture"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="17" />

 <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.ram.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>