Android录音应用实例教程

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:layout_gravity="center"
  android:gravity="center"
  android:orientation="vertical"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context=".MainActivity" >
 
  <Button
    android:id="@+id/btn_talk"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:enabled="false"
    android:text="TALK"
    android:textSize="30dp"
    android:textStyle="bold" />
 
</LinearLayout>

// 获得控件
public void get_con(){
   
  btn_talk = (Button)findViewById(R.id.btn_talk);
  btn_talk.setOnTouchListener(new OnTouchListener(){
    @Override
    public boolean onTouch(View v, MotionEvent e) {
      if (e.getAction() == MotionEvent.ACTION_DOWN){
        // 开始录音
        start_record();
      }
      else if (e.getAction() == MotionEvent.ACTION_UP){
        // 停止录音
        stop_record();
      }
      return false;
    }
  });
}

// 开始录音
public void start_record(){
  if (!Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)){     
    show_status("SD卡不存在,请插入SD卡!");     
  }
  else{
    try
    {
      // 获取当前时间
      cur_date = new Date(System.currentTimeMillis());
      str_file = formatter.format(cur_date); 
      // 创建保存录音的音频文件
      send_sound_file = new File(Environment.getExternalStorageDirectory().getCanonicalFile() + "/talk/send");
      // 如果目录不存在
      if (!send_sound_file.exists()){
        send_sound_file.mkdirs();
      }
      send_sound_file = new File(Environment.getExternalStorageDirectory().getCanonicalFile() + "/talk/send/" + str_file + ".amr");
      recorder = new MediaRecorder();
      // 设置录音的声音来源
      recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
      // 设置录制的声音的输出格式（必须在设置声音编码格式之前设置）
      recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
      // 设置声音编码的格式
      recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
      recorder.setOutputFile(send_sound_file.getAbsolutePath());
      recorder.prepare();
      // 开始录音
      recorder.start();
    }
    catch (Exception e)
    {
      show_status(e.toString());
    }
  }
}

// 停止录音
public void stop_record(){
  if (send_sound_file != null && send_sound_file.exists())
  {
    ses_id = ses_id + 1;
    // 停止录音
    recorder.stop();
    // 释放资源
    recorder.release();
    recorder = null;
  }
  super.onDestroy();
}