Using RecordAmplitude : MediaRecorder « Media « Android

1. Android
2. Media
3. MediaRecorder

Using RecordAmplitude

    
package app.test;

import java.io.File;
import java.io.IOException;

import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class Test extends Activity implements OnClickListener,
    OnCompletionListener {

  TextView statusTextView, amplitudeTextView;
  Button startRecording, stopRecording, playRecording, finishButton;
  MediaRecorder recorder;
  MediaPlayer player;
  File audioFile;

  RecordAmplitude recordAmplitude;
  boolean isRecording = false;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    statusTextView = (TextView) this.findViewById(R.id.StatusTextView);
    statusTextView.setText("Ready");

    amplitudeTextView = (TextView) this
        .findViewById(R.id.AmplitudeTextView);
    amplitudeTextView.setText("0");

    stopRecording = (Button) this.findViewById(R.id.StopRecording);
    startRecording = (Button) this.findViewById(R.id.StartRecording);
    playRecording = (Button) this.findViewById(R.id.PlayRecording);
    finishButton = (Button) this.findViewById(R.id.FinishButton);

    startRecording.setOnClickListener(this);
    stopRecording.setOnClickListener(this);
    playRecording.setOnClickListener(this);
    finishButton.setOnClickListener(this);

    stopRecording.setEnabled(false);
    playRecording.setEnabled(false);
  }

  public void onClick(View v) {
    if (v == finishButton) {
      finish();
    } else if (v == stopRecording) {
      isRecording = false;
      recordAmplitude.cancel(true);

      recorder.stop();
      recorder.release();

      player = new MediaPlayer();
      player.setOnCompletionListener(this);
      try {
        player.setDataSource(audioFile.getAbsolutePath());
        player.prepare();
      } catch (Exception e) {
        throw new RuntimeException(
            "Exception in MediaPlayer.prepare", e);
      }

      statusTextView.setText("Ready to Play");

      playRecording.setEnabled(true);
      stopRecording.setEnabled(false);
      startRecording.setEnabled(true);

    } else if (v == startRecording) {
      recorder = new MediaRecorder();

      recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
      recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
      recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

      File path = new File(
          Environment.getExternalStorageDirectory().getAbsolutePath()
              + "/files/");
      path.mkdirs();
      try {
        audioFile = File.createTempFile("recording", ".3gp", path);
      recorder.setOutputFile(audioFile.getAbsolutePath());
        recorder.prepare();
      } catch (Exception e) {
        throw new RuntimeException(
            "IOException on MediaRecorder.prepare", e);
      }
      recorder.start();
      isRecording = true;
      recordAmplitude = new RecordAmplitude();
      recordAmplitude.execute();
      statusTextView.setText("Recording");
      playRecording.setEnabled(false);
      stopRecording.setEnabled(true);
      startRecording.setEnabled(false);
    } else if (v == playRecording) {
      player.start();
      statusTextView.setText("Playing");
      playRecording.setEnabled(false);
      stopRecording.setEnabled(false);
      startRecording.setEnabled(false);
    }
  }

  public void onCompletion(MediaPlayer mp) {
    playRecording.setEnabled(true);
    stopRecording.setEnabled(false);
    startRecording.setEnabled(true);
    statusTextView.setText("Ready");
  }
  private class RecordAmplitude extends AsyncTask<Void, Integer, Void> {
    @Override
    protected Void doInBackground(Void... params) {
      while (isRecording) {
        try {
          Thread.sleep(500);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
        publishProgress(recorder.getMaxAmplitude());
      }
      return null;
    }
    protected void onProgressUpdate(Integer... progress) {
      amplitudeTextView.setText(progress[0].toString());
    }
  }
}

//main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/StatusTextView" android:text="Status" android:textSize="35dip"></TextView>
        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/AmplitudeTextView" android:textSize="35dip" android:text="0"></TextView>
        <Button android:text="Start Recording" android:id="@+id/StartRecording" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
        <Button android:text="Stop Recording" android:id="@+id/StopRecording" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
        <Button android:text="Play Recording" android:id="@+id/PlayRecording" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
        <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/FinishButton" android:text="Finish"></Button>
</LinearLayout>

   
    
    
    
  

Related examples in the same category