Sound Recorder in Android Development

This example shows how to record sound and save it to SD card it.
Algorithm:
1.) Create a new project by File-> New -> Android Project name it SoundRecorder.
2.) Write following into main.xml:

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

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

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="horizontal" >
    <Button

        android:id="@+id/start"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Start Recording"

        android:onClick="startRecording" />

    <Button

        android:id="@+id/stop"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Stop Recording" 

        android:enabled="false"

         android:onClick="stopRecording"

        />

</LinearLayout>

3.) Write following into manifest file:

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

    package="com.example.soundrecorder"

    android:versionCode="1"

    android:versionName="1.0" >
    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="15" />

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

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

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".SoundRecorder"

            android:label="@string/title_activity_sound_recorder" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

4.) Run for output.
Steps:
1.) Create a project named SoundRecorder and set the information as stated in the image.
Build Target: Android 4.0
Application Name: SoundRecorder
Package Name: com. example. SoundRecorder
Activity Name: SoundRecorder
Min SDK Version: 8

2.) Open SoundRecorder.java file and write following code there:

package com.example.soundrecorder;
import java.io.File;

import java.io.IOException;

import android.app.Activity;

import android.content.ContentResolver;

import android.content.ContentValues;

import android.content.Intent;

import android.media.MediaRecorder;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.provider.MediaStore;

import android.util.Log;

import android.view.View;

import android.widget.Toast;

public class SoundRecorder extends Activity {

        MediaRecorder recorder;

        File audiofile = null;

        private static final String TAG = "SoundRecordingActivity";

        private View startButton;

        private View stopButton;

        @Override

        public void onCreate(Bundle savedInstanceState) {

                super.onCreate(savedInstanceState);

                setContentView(R.layout.main);

                startButton = findViewById(R.id.start);

                stopButton = findViewById(R.id.stop);

        }

        public void startRecording(View view) throws IOException {

                startButton.setEnabled(false);

                stopButton.setEnabled(true);

                File sampleDir = Environment.getExternalStorageDirectory();

                try {

                        audiofile = File.createTempFile("sound", ".3gp", sampleDir);

                } catch (IOException e) {

                        Log.e(TAG, "sdcard access error");

                        return;

                }

                recorder = new MediaRecorder();

                recorder.setAudioSource(MediaRecorder.AudioSource.MIC);

                recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

                recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

                recorder.setOutputFile(audiofile.getAbsolutePath());

                recorder.prepare();

                recorder.start();

        }

        public void stopRecording(View view) {

                startButton.setEnabled(true);

                stopButton.setEnabled(false);

                recorder.stop();

                recorder.release();

                addRecordingToMediaLibrary();

        }

        protected void addRecordingToMediaLibrary() {

                ContentValues values = new ContentValues(4);

                long current = System.currentTimeMillis();

                values.put(MediaStore.Audio.Media.TITLE, "audio" + audiofile.getName());

                values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current / 1000));

                values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp");

                values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath());

                ContentResolver contentResolver = getContentResolver();

                Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;

                Uri newUri = contentResolver.insert(base, values);

                sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri));

                Toast.makeText(this, "Added File " + newUri, Toast.LENGTH_LONG).show();

        }

}