Android编程开发录音和播放录音简单示例

本文实例讲述了android编程开发录音和播放录音的方法。分享给大家供大家参考，具体如下：

/*
 * 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;
    }
  }
}

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希望本文所述对大家android程序设计有所帮助。