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();
}