Android How to - Record audio

The following code shows how to Record audio.

Example

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.java2s.myapplication3.app" >
    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />
    <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="java2s.com"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.java2s.myapplication3.app.MainActivity"
            android:label="java2s.com"
            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Layout xml file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <Button
    android:id="@+id/startButton"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Start Recording"
  />
  <Button
    android:id="@+id/stopButton"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Stop Recording"
    android:enabled="false"
  />
</LinearLayout>

Main activity Java code

package com.java2s.myapplication3.app;
//  w  w w  . ja  v a2s . c  om
import java.io.File;

import android.app.Activity;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {

    private MediaRecorder recorder;
    private Button start, stop;
    File path;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        start = (Button)findViewById(R.id.startButton);
        start.setOnClickListener(startListener);
        stop = (Button)findViewById(R.id.stopButton);
        stop.setOnClickListener(stopListener);

        recorder = new MediaRecorder();
        path = new File(Environment.getExternalStorageDirectory(),"myRecording.3gp");

        resetRecorder();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        recorder.release();
    }

    private void resetRecorder() {
        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
        recorder.setOutputFile(path.getAbsolutePath());
        try {
            recorder.prepare();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private View.OnClickListener startListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            try {
                recorder.start();

                start.setEnabled(false);
                stop.setEnabled(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    };

    private View.OnClickListener stopListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            recorder.stop();
            resetRecorder();

            start.setEnabled(true);
            stop.setEnabled(false);
        }
    };
}