Android平台下实现录音及播放录音功能的简介

package com.example.audiorecord;

import java.io.File;
import java.io.IOException;

import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class RecordActivity extends Activity {

    private static final String LOG_TAG = "AudioRecordTest";
    // 语音文件保存路径
    private String FileName = null;

    // 界面控件
    private Button startRecord;
    private Button startPlay;
    private Button stopRecord;
    private Button stopPlay;

    // 语音操作对象
    private MediaPlayer mPlayer = null;
    private MediaRecorder mRecorder = null;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // 开始录音
        startRecord = (Button) findViewById(R.id.startRecord);
        startRecord.setText(R.string.startRecord);
        // 绑定监听器
        startRecord.setOnClickListener(new startRecordListener());

        // 结束录音
        stopRecord = (Button) findViewById(R.id.stopRecord);
        stopRecord.setText(R.string.stopRecord);
        stopRecord.setOnClickListener(new stopRecordListener());

        // 开始播放
        startPlay = (Button) findViewById(R.id.startPlay);
        startPlay.setText(R.string.startPlay);
        // 绑定监听器
        startPlay.setOnClickListener(new startPlayListener());

        // 结束播放
        stopPlay = (Button) findViewById(R.id.stopPlay);
        stopPlay.setText(R.string.stopPlay);
        stopPlay.setOnClickListener(new stopPlayListener());

        // 设置sdcard的路径
        FileName = Environment.getExternalStorageDirectory().getAbsolutePath();
        FileName = FileName + File.separator + "audiorecordtest.arm";
    }

    // 开始录音
    class startRecordListener implements OnClickListener {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            mRecorder = new MediaRecorder();
            mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
            mRecorder.setOutputFile(FileName);
            mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
            try {
                mRecorder.prepare();
            } catch (IOException e) {
                Log.e(LOG_TAG, "prepare() failed");
            }
            mRecorder.start();
        }

    }

    // 停止录音
    class stopRecordListener implements OnClickListener {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            mRecorder.stop();
            mRecorder.release();
            mRecorder = null;
        }

    }

    // 播放录音
    class startPlayListener implements OnClickListener {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            mPlayer = new MediaPlayer();
            try {
                mPlayer.setDataSource(FileName);
                mPlayer.prepare();
                mPlayer.start();
            } catch (IOException e) {
                Log.e(LOG_TAG, "播放失败");
            }
        }

    }

    // 停止播放录音
    class stopPlayListener implements OnClickListener {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            mPlayer.release();
            mPlayer = null;
        }

    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/app_name" />

    <Button
        android:id="@+id/startRecord"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/stopRecord"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/startPlay"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/stopPlay"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

</LinearLayout>