Record audio via MediaRecorder
- by Isuru Madusanka
I am trying to record audio by MediaRecorder, and I get an error, I tried to change everything and nothing works. Last two hours I try to find the error, I used Log class too and I found out that error occurred when it call recorder.start() method. What could be the problem?
public class AudioRecorderActivity extends Activity {
MediaRecorder recorder;
File audioFile = null;
private static final String TAG = "AudioRecorderActivity";
private View startButton;
private View stopButton;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
startButton = findViewById(R.id.start);
stopButton = findViewById(R.id.stop);
setContentView(R.layout.main);
}
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){
Toast.makeText(getApplicationContext(), "SD Card Access Error", Toast.LENGTH_LONG).show();
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.setAudioEncodingBitRate(16);
recorder.setAudioSamplingRate(44100);
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();
}
}
And here is the xml layout.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="146dp"
android:onClick="startRecording"
android:text="Start Recording" />
<Button
android:id="@+id/stop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/start"
android:layout_below="@+id/start"
android:layout_marginTop="41dp"
android:enabled="false"
android:onClick="stopRecording"
android:text="Stop Recording" />
</RelativeLayout>
And I added permission to AndroidManifest file.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="in.isuru.audiorecorder"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".AudioRecorderActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.RECORD_AUDIO" />
</manifest>
I need to record high quality audio.
Thanks!
