Android Tutorial - Javatpoint

Basics of Android

Android MediaRecorder Example

MediaRecorder class can be used to record audio and video files.
After recording the media, we can create a sound file that can be played later.
In this example, we are going to record the audio file and storing it in the external directory in 3gp format.

activity_main.xml

Drag 2 buttons from the pallete, one to start the recording and another stop the recording. Here, we are registering the view with the listener in xml file using android:onClick.

File: 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/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="68dp"
        android:layout_marginTop="50dp"
        android:text="Start Recording"
        android:onClick="startRecording"
         />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/button1"
        android:layout_marginTop="64dp"
        android:text="Stop Recording" 
        android:onClick="stopRecording"
        />

</RelativeLayout>

Activity class

File: MainActivity.java

package com.javatpoint.mediarecorder;
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.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
   MediaRecorder recorder;
   File audiofile = null;
   static final String TAG = "MediaRecording";
   Button startButton,stopButton;

   @Override
   public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.activity_main);
     startButton = (Button) findViewById(R.id.button1);
     stopButton = (Button) findViewById(R.id.button2);
   }

   public void startRecording(View view) throws IOException {
     startButton.setEnabled(false);
     stopButton.setEnabled(true);
            //Creating file
     File dir = Environment.getExternalStorageDirectory();
     try {
       audiofile = File.createTempFile("sound", ".3gp", dir);
     } catch (IOException e) {
       Log.e(TAG, "external storage access error");
       return;
     }
            //Creating MediaRecorder and specifying audio source, output format, encoder & output format
     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);
            //stopping recorder
     recorder.stop();
     recorder.release();
           //after stopping the recorder, create the sound file and add it to media library.
     addRecordingToMediaLibrary();
   }

   protected void addRecordingToMediaLibrary() {
            //creating content values of size 4
     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());
         
             //creating content resolver and storing it in the external content uri
     ContentResolver contentResolver = getContentResolver();
     Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
     Uri newUri = contentResolver.insert(base, values);

           //sending broadcast message to scan the media file so that it can be available
     sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri));
     Toast.makeText(this, "Added File " + newUri, Toast.LENGTH_LONG).show();
   }
 }

Output:

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