Come registrare l'audio utilizzando Android 1.5?

Question

Come registrare audio utilizzando Android?

Answer 1

package com.benmccann.android.hello; 

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

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

/** 
* @author <a href="http://www.benmccann.com">Ben McCann</a> 
*/ 
public class AudioRecorder { 

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

    /** 
    * Creates a new audio recording at the given path (relative to root of SD card). 
    */ 
    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; 
    } 

    /** 
    * Starts a new recording. 
    */ 
    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(); 
    } 

    /** 
    * Stops a recording that has been previously started. 
    */ 
    public void stop() throws IOException { 
    recorder.stop(); 
    recorder.release(); 
    } 
} 

Da http://www.benmccann.com/dev-blog/android-audio-recording-tutorial/

Answer 2

package com.training.Recorder2; 

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 Recorder2 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 Recorder2() { 
     mFileName = Environment.getExternalStorageDirectory().getAbsolutePath(); 
     mFileName += "/audiorecordtest.3gp"; 
    } 

    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)); 
     ll.setBackgroundResource(R.drawable.android); 

     setContentView(ll); 
    } 

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

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

e quindi aggiungere a AndroidManifest.xml ---> Questi due linee ---> --->

funziona davvero per me :)

Answer 3

final Intent audioIntent = new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION); 
      File audioFile = new File(Environment.getExternalStorageDirectory(), "videoTest.mp4"); 
      audioFileUri = Uri.fromFile(audioFile); 
      audioIntent.putExtra(MediaStore.EXTRA_OUTPUT, audioFileUri); 
      startActivityForResult(audioIntent, TAKE_AUDIO);