androidvoice-recording

How can I record voice in android as long as hold a button?


I want to record voice as long as holding the record button and save that voice into the raw folder in my project. I used the code below. Altough there appears no errors, i couldn't get any output. What can be the problem ? Do you have any suggestions? Thanks,

public boolean onTouch(View v, MotionEvent event) {
    // TODO Auto-generated method stub


    Runnable mAction = new Runnable() {
        public void run() {
            System.out.println("Performing action...");

            int frequency=11025;
            int channelConfiguration=AudioFormat.CHANNEL_CONFIGURATION_MONO;
            int audioEncoding= AudioFormat.ENCODING_PCM_16BIT;
            File file=new File(Environment.getExternalStorageDirectory(),"raw.pcm");

            try{
                file.createNewFile();
            }catch(IOException e){}

            try{
                OutputStream os=new FileOutputStream(file);
                BufferedOutputStream bos=new BufferedOutputStream(os);
                DataOutputStream dos=new DataOutputStream(bos);

                int bufferSize=AudioRecord.getMinBufferSize(frequency, channelConfiguration,
                        audioEncoding);

                short[] buffer=new short[bufferSize];
                audioRecorder=new AudioRecord(MediaRecorder.AudioSource.MIC,
                        frequency, channelConfiguration, audioEncoding, bufferSize);

                audioRecorder.startRecording();

                isRecording=true;

                while(isRecording){

                    int                                    bufferReadResult=audioRecorder.read(buffer, 0,bufferSize);

                    for(int i=0;i<bufferReadResult;i++){

                        dos.writeShort(buffer[i]);

                    }

                }

                audioRecorder.stop();
                dos.close();

            }catch(Throwable t){}

        }
    };

    switch(event.getAction()) {
    case MotionEvent.ACTION_DOWN:
        if (myHandler != null) return true;
        myHandler = new Handler();
        myHandler.postDelayed(mAction, 500);
        break;
    case MotionEvent.ACTION_UP:

        if (myHandler == null) return true;


        isRecording=false;

        myHandler.removeCallbacks(mAction);
        myHandler = null;
        break;
    }

    return false;
}

Solution

  • here is your answer...

    import java.io.File;
    import java.io.IOException;
    import android.app.Activity;
    import android.media.MediaRecorder;
    import android.os.Bundle;
    import android.os.Environment;
    import android.view.MotionEvent;
    import android.view.View;
    import android.widget.Button;
    
    public class AudioOnTouchActivity extends Activity {
        Button b1;
        private static final String AUDIO_RECORDER_FILE_EXT_3GP = ".3gp";
        private static final String AUDIO_RECORDER_FILE_EXT_MP4 = ".mp4";
        private static final String AUDIO_RECORDER_FOLDER = "AudioRecorder";
        private MediaRecorder recorder = null;
        private int currentFormat = 0;
        private int output_formats[] = { MediaRecorder.OutputFormat.MPEG_4,             MediaRecorder.OutputFormat.THREE_GPP };
        private String file_exts[] = { AUDIO_RECORDER_FILE_EXT_MP4, AUDIO_RECORDER_FILE_EXT_3GP }; 
        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            b1=(Button)findViewById(R.id.button1);
            b1.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    // TODO Auto-generated method stub
                    switch(event.getAction()){
                    case MotionEvent.ACTION_DOWN:
                        AppLog.logString("Start Recording");
                        startRecording();
                        return true;
                    case MotionEvent.ACTION_UP:
                        AppLog.logString("stop Recording");
                        stopRecording();
                        break;
                    }
                    return false;
                }
            });
        }
    
        private String getFilename(){
            String filepath = Environment.getExternalStorageDirectory().getPath();
            File file = new File(filepath,AUDIO_RECORDER_FOLDER);
    
            if(!file.exists()){
                file.mkdirs();
            }
    
            return (file.getAbsolutePath() + "/" + System.currentTimeMillis() + file_exts[currentFormat]);
        }
    
        private void startRecording(){
            recorder = new MediaRecorder();
            recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            recorder.setOutputFormat(output_formats[currentFormat]);
            recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
            recorder.setOutputFile(getFilename());
            recorder.setOnErrorListener(errorListener);
            recorder.setOnInfoListener(infoListener);
    
            try {
                recorder.prepare();
                recorder.start();
            } catch (IllegalStateException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    
        private MediaRecorder.OnErrorListener errorListener = new MediaRecorder.OnErrorListener() {
               @Override
                public void onError(MediaRecorder mr, int what, int extra) {
                    AppLog.logString("Error: " + what + ", " + extra);
            }
        };
    
        private MediaRecorder.OnInfoListener infoListener = new MediaRecorder.OnInfoListener() {
            @Override
            public void onInfo(MediaRecorder mr, int what, int extra) {
                    AppLog.logString("Warning: " + what + ", " + extra);
            }
        };
    
        private void stopRecording(){
            if(null != recorder){
                recorder.stop();
                recorder.reset();
                recorder.release();
    
                recorder = null;
            }
        }
    }
    

    AppLog.java file is

    import android.util.Log;
    
    public class AppLog {
    private static final String APP_TAG = "AudioRecorder";
    
    public static int logString(String message){
         return Log.i(APP_TAG,message);
    }
    

    the xml is

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" 
        >
    
        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/hello" />
    
        <Button
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Button" 
            android:layout_gravity="center"
            android:layout_marginTop="10dp"/>
    
    </LinearLayout>
    

    Add these permission to your manifest file

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
            <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>