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,0)); setContentView(ll); } @Override public void onPause() { super.onPause(); if (mRecorder != null) { mRecorder.release(); mRecorder = null; } if (mPlayer != null) { mPlayer.release(); mPlayer = null; } } }
更多关于Android相关内容感兴趣的读者可查看本站专题:《Android多媒体操作技巧汇总(音频,视频,录音等)》、《Android开发入门与进阶教程》、《Android视图View技巧总结》、《Android编程之activity操作技巧总结》、《Android操作SQLite数据库技巧总结》、《Android操作json格式数据技巧总结》、《Android数据库操作技巧总结》、《Android文件操作技巧汇总》、《Android编程开发之SD卡操作方法汇总》、《Android资源操作技巧汇总》及《Android控件用法总结》
希望本文所述对大家Android程序设计有所帮助。
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。