Contoh Android MediaRecorder

Kelas MediaRecorder dapat digunakan untuk merekam file audio dan video.
Setelah merekam media, kita dapat membuat file suara yang dapat diputar nanti.
Dalam contoh ini, kita akan merekam file audio dan menyimpannya dalam direktori eksternal dalam format 3gp.

* Main activity

Seret 2 tombol dari pallete, satu untuk memulai perekaman dan satu lagi menghentikan perekaman. Di sini, kita mendaftarkan tampilan dengan listener dalam file xml menggunakan android:onClick.

File : activity_main.xml

<RelativeLayout xmlns:androclass="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.android.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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