Android 录音与播放功能的简单实例

 android 录音与播放功能的简单实例

最近在研究android中一些常用的功能，像地图、拍照、录音和播放的实现等等，还有一些侧滑、动画等是如何实现的。
今天就把录音和播放的实现分享一下，录音和播放比较简单，利用android内部的类即可实现。

1、先看下运行后的界面：

以下三张图分别是进入、录音、播放时的。

 

2、layout布局文件

<?xml version="1.0" encoding="utf-8"?> 
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" > 
 
  <textview 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_alignparenttop="true" 
    android:background="@drawable/switcherbar_bg" 
    android:gravity="center" 
    android:text="@string/audio_record_title" 
    android:textcolor="#ffffff" 
    android:textsize="16sp" /> 
 
  <linearlayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_centerinparent="true" 
    android:orientation="vertical" 
    android:paddingleft="10dip" 
    android:paddingright="10dip" > 
 
    <textview 
      android:id="@+id/audio_record_time" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:text="00:00" /> 
 
    <linearlayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_margintop="10dip" 
      android:orientation="horizontal" > 
 
      <button 
        android:id="@+id/audio_record_start" 
        android:layout_width="0dip" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:background="@drawable/searchbtn_normal" 
        android:text="开始录音" 
        android:textsize="14sp" /> 
 
      <button 
        android:id="@+id/audio_record_stop" 
        android:layout_width="0dip" 
        android:layout_height="wrap_content" 
        android:layout_marginleft="5dip" 
        android:layout_weight="1" 
        android:background="@drawable/searchbtn_bg" 
        android:text="结束录音" 
        android:textsize="14sp" /> 
    </linearlayout> 
 
    <linearlayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_margintop="10dip" 
      android:orientation="horizontal" > 
 
      <button 
        android:id="@+id/audio_record_play" 
        android:layout_width="0dip" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:background="@drawable/searchbtn_normal" 
        android:text="播放录音" 
        android:textsize="14sp" /> 
 
      <button 
        android:id="@+id/audio_record_select" 
        android:layout_width="0dip" 
        android:layout_height="wrap_content" 
        android:layout_marginleft="5dip" 
        android:layout_weight="1" 
        android:background="@drawable/searchbtn_bg" 
        android:text="确定选择" 
        android:textsize="14sp" /> 
    </linearlayout> 
  </linearlayout> 
 
</relativelayout> 

3 activity类

录音涉及到二个activity，第一个activity比较简单，我这里大概说下，其实就是有个按钮，点击后转移第二个activity，录音返回后，在第一个activity中获取录音的文件名、时长等。

第一个activity部分代码：

 // 录音事件 
  ksly_btn.setonclicklistener(new onclicklistener() { 
    @override 
    public void onclick(view v) { 
      intent intent = new intent(maintainvisiteditactivity.this, audiorecordactivity.class); 
      intent.setaction(intent.action_view); 
      intent.putextra("duration", entity.getvoiceduration()); 
      intent.putextra("filename", entity.getvoicerecord()); 
      startactivityforresult(intent, voice_recode); 
    } 
  }); 
 
@override 
protected void onactivityresult(int requestcode, int resultcode, intent data) { 
  super.onactivityresult(requestcode, resultcode, data); 
 
  if (requestcode == voice_recode && resultcode == audiorecordactivity.success) { 
    entity.setvoiceduration(data.getlongextra("duration", 0));// 时长 
    entity.setvoicerecord(data.getstringextra("filename"));// 文件名（绝对路径） 
    ksly_time.settext(datetimeutils.formattomillisecond(entity.getvoiceduration())); 
  } 
} 

第二个activity代码：

这里要注意一下，就是需要捕获返回键，处理一下，就是点击返回键时，也返回个状态码，以表示没有录音成功。

package com.whowii.ct.cm.activity; 
 
import java.io.file; 
import java.io.ioexception; 
import java.text.simpledateformat; 
import java.util.date; 
import java.util.timer; 
import java.util.timertask; 
 
import android.app.activity; 
import android.content.intent; 
import android.media.mediaplayer; 
import android.media.mediaplayer.oncompletionlistener; 
import android.media.mediarecorder; 
import android.os.bundle; 
import android.os.handler; 
import android.os.message; 
import android.util.log; 
import android.view.keyevent; 
import android.view.view; 
import android.view.view.onclicklistener; 
import android.view.window; 
import android.widget.button; 
import android.widget.textview; 
import android.widget.toast; 
 
import com.whowii.ct.cm.r; 
import com.whowii.ct.cm.command.queryparams; 
import com.whowii.ct.cm.utils.datetimeutils; 
import com.whowii.ct.cm.utils.sdcardutils; 
 
/** 
 * 录制音频 
 * 
 * @author administrator 
 * 
 */ 
public class audiorecordactivity extends activity { 
  private textview audio_record_time; 
  private button audio_record_start, audio_record_stop, audio_record_play, audio_record_select; 
  private mediarecorder mediarecorder; 
  private final string tag = audiorecordactivity.class.getsimplename(); 
  private boolean isidle = true;// 当前是否空闲，false：表示正在录音 
  private long starttime = 0, stoptime = 0, duration = 0;// 开始时间、结束时间、录音时长 
  private string filename = null;// 存储录音文件的路径 
  private timer timer = null;// timer计时器 
  public static final int success = 1;// 录制成功; 
  public static final int failure = 0;// 录制失败 
  private mediaplayer mediaplayer; 
  private timertask task = new timertask() { 
    final handler handler = new handler() { 
      public void handlemessage(message message) { 
        bundle data = message.getdata(); 
        audio_record_time.settext(datetimeutils.formattomillisecond(data.getlong("time"))); 
      } 
    }; 
 
    public void run() { 
      message message = new message(); 
      long t = system.currenttimemillis(); 
      bundle data = new bundle(); 
      data.putlong("time", t - starttime); 
      message.setdata(data); 
      handler.sendmessage(message); 
    } 
  }; 
 
  protected void oncreate(bundle savedinstancestate) { 
    super.oncreate(savedinstancestate); 
    requestwindowfeature(window.feature_no_title); // 设置无标题栏 
 
    setcontentview(r.layout.audio_record); 
    mediaplayer = new mediaplayer(); 
 
    initcontrol(); 
    setlistener(); 
 
    timer = new timer(true); 
    filename = getintent().getstringextra("filename"); 
    duration = getintent().getlongextra("duration", 0); 
  } 
 
  private void initcontrol() { 
    audio_record_time = (textview) findviewbyid(r.id.audio_record_time); 
    audio_record_start = (button) findviewbyid(r.id.audio_record_start); 
    audio_record_stop = (button) findviewbyid(r.id.audio_record_stop); 
    audio_record_play = (button) findviewbyid(r.id.audio_record_play); 
    audio_record_select = (button) findviewbyid(r.id.audio_record_select); 
  } 
 
  private void setlistener() { 
    // 播放完成事件 
    mediaplayer.setoncompletionlistener(new oncompletionlistener() { 
      @override 
      public void oncompletion(mediaplayer mp) { 
        isidle = true; 
        audio_record_play.settext("播放录音"); 
        audio_record_play.setbackgroundresource(r.drawable.searchinput_bg); 
      } 
    }); 
    // 开始录音 
    audio_record_start.setonclicklistener(new onclicklistener() { 
      @override 
      public void onclick(view v) { 
        if (!isidle) { 
          return; 
        } 
        if (!sdcardutils.sdcardexists()) { 
          toast.maketext(audiorecordactivity.this, "缺少sd卡，请先插入后再操作！", toast.length_long).show(); 
          return; 
        } 
        audio_record_start.settext("开始录音"); 
        audio_record_start.setenabled(true); 
 
        duration = 0; 
        starttime = system.currenttimemillis(); 
        filename = queryparams.cache_audio_path; 
        filename += new simpledateformat("yyyymmdd_hhmmss").format(new date(starttime)) + ".amr"; 
        file file = new file(filename); 
 
        mediarecorder = new mediarecorder(); 
        mediarecorder.setoutputfile(file.getabsolutepath()); 
        mediarecorder.setaudiosource(mediarecorder.audiosource.mic); 
        mediarecorder.setoutputformat(mediarecorder.outputformat.three_gpp); 
        mediarecorder.setaudioencoder(mediarecorder.audioencoder.amr_nb); 
        try { 
          mediarecorder.prepare(); 
          mediarecorder.start(); 
          isidle = false; 
          audio_record_start.setbackgroundresource(r.drawable.searchbtn_pressed); 
          timer.schedule(task, 0, 100); 
        } catch (ioexception e) { 
          starttime = 0; 
          log.e(tag, e.tostring()); 
          toast.maketext(audiorecordactivity.this, "录制时发生异常！", toast.length_long).show(); 
        } 
      } 
    }); 
    // 结束录音 
    audio_record_stop.setonclicklistener(new onclicklistener() { 
      @override 
      public void onclick(view v) { 
        if (mediarecorder != null) { 
          stoptime = system.currenttimemillis(); 
          duration = stoptime - starttime; 
          timer.cancel(); 
          mediarecorder.stop(); 
          mediarecorder.release(); 
          mediarecorder = null; 
          audio_record_start.setbackgroundresource(r.drawable.searchbtn_normal); 
          isidle = true; 
        } 
      } 
    }); 
    // 播放录音 
    audio_record_play.setonclicklistener(new onclicklistener() { 
      @override 
      public void onclick(view v) { 
        if (!isidle) { 
          return; 
        } 
 
        if (audio_record_play.gettext().equals("播放录音")) { 
          if (filename == null || filename.equals("") || duration == 0) { 
            toast.maketext(audiorecordactivity.this, "没有录音文件！", toast.length_long).show(); 
            return; 
          } 
 
          try { 
            mediaplayer.reset(); 
            mediaplayer.setdatasource(filename); 
            mediaplayer.prepare(); 
            mediaplayer.start(); 
            isidle = false; 
            audio_record_play.settext("终止播放"); 
            audio_record_play.setbackgroundresource(r.drawable.searchbtn_pressed); 
          } catch (exception e) { 
            e.printstacktrace(); 
            toast.maketext(audiorecordactivity.this, "播放录音时遇到错误！", toast.length_long).show(); 
          } 
        } else { 
          if (mediaplayer != null && mediaplayer.isplaying()) { 
            mediaplayer.stop(); 
            isidle = true; 
          } 
          audio_record_play.settext("播放录音"); 
          audio_record_play.setbackgroundresource(r.drawable.searchinput_bg); 
        } 
      } 
    }); 
    // 确认选择 
    audio_record_select.setonclicklistener(new onclicklistener() { 
      @override 
      public void onclick(view v) { 
        if (filename == null || filename.equals("") || duration == 0) { 
          toast.maketext(audiorecordactivity.this, "没有录音文件！", toast.length_long).show(); 
          return; 
        } 
 
        intent intent = new intent(); 
        intent.putextra("filename", filename); 
        intent.putextra("duration", duration); 
        setresult(success, intent);// 返回成功标识 
        isidle = true; 
        if (mediaplayer != null) { 
          if (mediaplayer.isplaying()) { 
            mediaplayer.stop(); 
          } 
          mediaplayer = null; 
        } 
        finish();// 结束当前的activity,等于点击返回按钮 
      } 
    }); 
  } 
 
  // 捕获返回键，关闭当前页面时返回失败标识 
  @override 
  public boolean onkeydown(int keycode, keyevent event) { 
    if (keycode == keyevent.keycode_back) { 
      setresult(failure); 
      isidle = true; 
      if (mediaplayer != null) { 
        if (mediaplayer.isplaying()) { 
          mediaplayer.stop(); 
        } 
        mediaplayer = null; 
      } 
      finish(); 
      return true; 
    } 
    return super.onkeydown(keycode, event); 
  } 
 
} 

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！