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

1. <RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android"  
2.     xmlns:tools="http://schemas.android.com/tools"  
3.     android:layout_width="match_parent"  
4.     android:layout_height="match_parent"  
5.     android:paddingBottom="@dimen/activity_vertical_margin"  
6.     android:paddingLeft="@dimen/activity_horizontal_margin"  
7.     android:paddingRight="@dimen/activity_horizontal_margin"  
8.     android:paddingTop="@dimen/activity_vertical_margin"  
9.     tools:context=".MainActivity" >  
10.   
11.     <Button  
12.         android:id="@+id/button1"  
13.         android:layout_width="wrap_content"  
14.         android:layout_height="wrap_content"  
15.         android:layout_alignParentLeft="true"  
16.         android:layout_alignParentTop="true"  
17.         android:layout_marginLeft="68dp"  
18.         android:layout_marginTop="50dp"  
19.         android:text="Start Recording"  
20.         android:onClick="startRecording"  
21.          />  
22.   
23.     <Button  
24.         android:id="@+id/button2"  
25.         android:layout_width="wrap_content"  
26.         android:layout_height="wrap_content"  
27.         android:layout_alignLeft="@+id/button1"  
28.         android:layout_below="@+id/button1"  
29.         android:layout_marginTop="64dp"  
30.         android:text="Stop Recording"   
31.         android:onClick="stopRecording"  
32.         />  
33.   
34. </RelativeLayout>  

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Activity class

File: MainActivity.java

1. package com.javatpoint.mediarecorder;  
2. import java.io.File;  
3. import java.io.IOException;  
4. import android.app.Activity;  
5. import android.content.ContentResolver;  
6. import android.content.ContentValues;  
7. import android.content.Intent;  
8. import android.media.MediaRecorder;  
9. import android.net.Uri;  
10. import android.os.Bundle;  
11. import android.os.Environment;  
12. import android.provider.MediaStore;  
13. import android.util.Log;  
14. import android.view.View;  
15. import android.widget.Button;  
16. import android.widget.Toast;  
17.   
18. public class MainActivity extends Activity {  
19.       MediaRecorder recorder;  
20.       File audiofile = null;  
21.       static final String TAG = "MediaRecording";  
22.       Button startButton,stopButton;  
23.   
24.       @Override  
25.       public void onCreate(Bundle savedInstanceState) {  
26.         super.onCreate(savedInstanceState);  
27.         setContentView(R.layout.activity_main);  
28.         startButton = (Button) findViewById(R.id.button1);  
29.         stopButton = (Button) findViewById(R.id.button2);  
30.       }  
31.   
32.       public void startRecording(View view) throws IOException {  
33.         startButton.setEnabled(false);  
34.         stopButton.setEnabled(true);  
35.             //Creating file  
36.         File dir = Environment.getExternalStorageDirectory();  
37.         try {  
38.           audiofile = File.createTempFile("sound", ".3gp", dir);  
39.         } catch (IOException e) {  
40.           Log.e(TAG, "external storage access error");  
41.           return;  
42.         }  
43.             //Creating MediaRecorder and specifying audio source, output format, encoder & output format  
44.         recorder = new MediaRecorder();  
45.         recorder.setAudioSource(MediaRecorder.AudioSource.MIC);  
46.         recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);  
47.         recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);  
48.         recorder.setOutputFile(audiofile.getAbsolutePath());  
49.         recorder.prepare();  
50.         recorder.start();  
51.       }  
52.   
53.       public void stopRecording(View view) {  
54.         startButton.setEnabled(true);  
55.         stopButton.setEnabled(false);  
56.             //stopping recorder  
57.         recorder.stop();  
58.         recorder.release();  
59.            //after stopping the recorder, create the sound file and add it to media library.  
60.         addRecordingToMediaLibrary();  
61.       }  
62.   
63.       protected void addRecordingToMediaLibrary() {  
64.             //creating content values of size 4  
65.         ContentValues values = new ContentValues(4);  
66.         long current = System.currentTimeMillis();  
67.         values.put(MediaStore.Audio.Media.TITLE, "audio" + audiofile.getName());  
68.         values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current / 1000));  
69.         values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp");  
70.         values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath());  
71.            
72.              //creating content resolver and storing it in the external content uri  
73.         ContentResolver contentResolver = getContentResolver();  
74.         Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;  
75.         Uri newUri = contentResolver.insert(base, values);  
76.   
77.            //sending broadcast message to scan the media file so that it can be available  
78.         sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri));  
79.         Toast.makeText(this, "Added File " + newUri, Toast.LENGTH_LONG).show();  
80.       }  
81.     }   

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Output: