Sound Recorder in Android Development

2

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();
	}
}

3.) Compile and build the project.

Output

  • Navdeep

    Can we control in which format files are saved??

  • http://www.facebook.com/people/Alex-Scali/100002766781762 Alex Scali

    +100. Very good, Can i save talk in Skype on SD card ?

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