Android平台下实现录音及播放录音功能的简介

录音及播放的方法如下：

 

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;

        }



    }

}

 

 

界面布局如下：

<?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>

 

完整项目代码： http://download.csdn.net/detail/abc13939746593/6920293