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();}