¿Cómo grabar voz en Android?

Question

Estoy tratando de grabar la voz en Android Pero creará el archivo .mp3 en la ruta (sdcard/filename) Pero cuando ejecuto este archivo no se reproduce porque no graba la voz.

Aquí está mi código

public void onClick(View v) { 
     // TODO Auto-generated method stub 
     switch(v.getId()){ 
     case(R.id.Button01): 
      try { 
       //audio.start(); 
       startRecord(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     case(R.id.Button02): 
      //audio.stop(); 
      stopRecord(); 
     } 

    } 
    private void startRecord() throws IllegalStateException, IOException{ 
      // recorder = new MediaRecorder(); 
      recorder.setAudioSource(MediaRecorder.AudioSource.MIC); //ok so I say audio source is the microphone, is it windows/linux microphone on the emulator? 
      recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
      recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
      recorder.setOutputFile("/sdcard/Music/"+System.currentTimeMillis()+".amr"); 
      recorder.prepare(); 
      recorder.start();  
     } 

     private void stopRecord(){ 
      recorder.stop(); 
      //recorder.release(); 
     } 



} 

archivo de manifiesto

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

Answer 1

Consulte la Android Audio Capture documentation para grabar audio y reproducir el audio grabado.

Answer 2

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

import android.media.MediaPlayer; 
import android.media.MediaRecorder; 
import android.os.Environment; 

public class AudioRecorder { 

    final MediaRecorder recorder = new MediaRecorder(); 
    public final String path; 

    public AudioRecorder(String path) { 
     this.path = sanitizePath(path); 
    } 

    private String sanitizePath(String path) { 
     if (!path.startsWith("/")) { 
      path = "/" + path; 
     } 
     if (!path.contains(".")) { 
      path += ".3gp"; 
     } 
     return Environment.getExternalStorageDirectory().getAbsolutePath() 
       + path; 
    } 

    public void start() throws IOException { 
     String state = android.os.Environment.getExternalStorageState(); 
     if (!state.equals(android.os.Environment.MEDIA_MOUNTED)) { 
      throw new IOException("SD Card is not mounted. It is " + state 
        + "."); 
     } 

     // make sure the directory we plan to store the recording in exists 
     File directory = new File(path).getParentFile(); 
     if (!directory.exists() && !directory.mkdirs()) { 
      throw new IOException("Path to file could not be created."); 
     } 

     recorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
     recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
     recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
     recorder.setOutputFile(path); 
     recorder.prepare(); 
     recorder.start(); 
    } 

    public void stop() throws IOException { 
     recorder.stop(); 
     recorder.release(); 
    } 

    public void playarcoding(String path) throws IOException { 
     MediaPlayer mp = new MediaPlayer(); 
     mp.setDataSource(path); 
     mp.prepare(); 
     mp.start(); 
     mp.setVolume(10, 10); 
    } 
} 

Answer 3

si ha buscado Google, encontrará esto en sus guías API:

/* 
* The application needs to have the permission to write to external storage 
* if the output file is written to the external storage, and also the 
* permission to record audio. These permissions must be set in the 
* application's AndroidManifest.xml file, with something like: 
* 
* <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
* <uses-permission android:name="android.permission.RECORD_AUDIO" /> 
* 
*/ 
package com.android.audiorecordtest; 

import android.app.Activity; 
import android.widget.LinearLayout; 
import android.os.Bundle; 
import android.os.Environment; 
import android.view.ViewGroup; 
import android.widget.Button; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.content.Context; 
import android.util.Log; 
import android.media.MediaRecorder; 
import android.media.MediaPlayer; 

import java.io.IOException; 


public class AudioRecordTest extends Activity 
{ 
    private static final String LOG_TAG = "AudioRecordTest"; 
    private static String mFileName = null; 

    private RecordButton mRecordButton = null; 
    private MediaRecorder mRecorder = null; 

    private PlayButton mPlayButton = null; 
    private MediaPlayer mPlayer = null; 

    private void onRecord(boolean start) { 
     if (start) { 
      startRecording(); 
     } else { 
      stopRecording(); 
     } 
    } 

    private void onPlay(boolean start) { 
     if (start) { 
      startPlaying(); 
     } else { 
      stopPlaying(); 
     } 
    } 

    private void startPlaying() { 
     mPlayer = new MediaPlayer(); 
     try { 
      mPlayer.setDataSource(mFileName); 
      mPlayer.prepare(); 
      mPlayer.start(); 
     } catch (IOException e) { 
      Log.e(LOG_TAG, "prepare() failed"); 
     } 
    } 

    private void stopPlaying() { 
     mPlayer.release(); 
     mPlayer = null; 
    } 

    private void startRecording() { 
     mRecorder = new MediaRecorder(); 
     mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
     mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
     mRecorder.setOutputFile(mFileName); 
     mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 

     try { 
      mRecorder.prepare(); 
     } catch (IOException e) { 
      Log.e(LOG_TAG, "prepare() failed"); 
     } 

     mRecorder.start(); 
    } 

    private void stopRecording() { 
     mRecorder.stop(); 
     mRecorder.release(); 
     mRecorder = null; 
    } 

    class RecordButton extends Button { 
     boolean mStartRecording = true; 

     OnClickListener clicker = new OnClickListener() { 
      public void onClick(View v) { 
       onRecord(mStartRecording); 
       if (mStartRecording) { 
        setText("Stop recording"); 
       } else { 
        setText("Start recording"); 
       } 
       mStartRecording = !mStartRecording; 
      } 
     }; 

     public RecordButton(Context ctx) { 
      super(ctx); 
      setText("Start recording"); 
      setOnClickListener(clicker); 
     } 
    } 

    class PlayButton extends Button { 
     boolean mStartPlaying = true; 

     OnClickListener clicker = new OnClickListener() { 
      public void onClick(View v) { 
       onPlay(mStartPlaying); 
       if (mStartPlaying) { 
        setText("Stop playing"); 
       } else { 
        setText("Start playing"); 
       } 
       mStartPlaying = !mStartPlaying; 
      } 
     }; 

     public PlayButton(Context ctx) { 
      super(ctx); 
      setText("Start playing"); 
      setOnClickListener(clicker); 
     } 
    } 

    public AudioRecordTest() { 
     mFileName = Environment.getExternalStorageDirectory().getAbsolutePath(); 
     mFileName += "/audiorecordtest.3gp"; 
    } 

    @Override 
    public void onCreate(Bundle icicle) { 
     super.onCreate(icicle); 

     LinearLayout ll = new LinearLayout(this); 
     mRecordButton = new RecordButton(this); 
     ll.addView(mRecordButton, 
      new LinearLayout.LayoutParams(
       ViewGroup.LayoutParams.WRAP_CONTENT, 
       ViewGroup.LayoutParams.WRAP_CONTENT, 
       0)); 
     mPlayButton = new PlayButton(this); 
     ll.addView(mPlayButton, 
      new LinearLayout.LayoutParams(
       ViewGroup.LayoutParams.WRAP_CONTENT, 
       ViewGroup.LayoutParams.WRAP_CONTENT, 
       0)); 
     setContentView(ll); 
    } 

    @Override 
    public void onPause() { 
     super.onPause(); 
     if (mRecorder != null) { 
      mRecorder.release(); 
      mRecorder = null; 
     } 

     if (mPlayer != null) { 
      mPlayer.release(); 
      mPlayer = null; 
     } 
    } 
} 

SOURCE

Answer 4

oficial Ejemplo enlace de Google https://developer.android.com/guide/topics/media/mediarecorder.html#example

Sugiero seguir sólo eso uno ya que está garantizado para estar actualizado y seguro.