Android 使用MediaRecorder录音

package com.example.HyyRecord;



import android.app.Activity;

import android.content.Intent;

import android.media.MediaRecorder;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.view.View;



import java.io.File;

import java.io.IOException;



public class MyActivity extends Activity {

    private MediaRecorder mediaRecorder;



    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        //首先要保证这个文件夹存在

        File file = new File("/sdcard/0hyyRecord");

        if (!file.exists()) {

            file.mkdir();

        }

        mediaRecorder = new MediaRecorder();

        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

        mediaRecorder.setOutputFile("/sdcard/0hyyRecord/" + System.currentTimeMillis() + ".3pg");



    }



    public void startRecord(View view) {

        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {

            try {

                mediaRecorder.prepare();

            } catch (IOException e) {

                e.printStackTrace();

            }

            mediaRecorder.start();

        } else {

            System.out.println("sd卡不可用");

        }

    }



    public void stopRecord(View view) {

        mediaRecorder.stop();

        mediaRecorder.reset();

    }



    @Override

    protected void onDestroy() {

        try {

            mediaRecorder.release();

        } catch (Exception e) {

            e.printStackTrace();

        }

        super.onDestroy();

    }



   

}

 界面文件：

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

              android:orientation="vertical"

              android:layout_width="fill_parent"

              android:layout_height="fill_parent"

        >

    <Button android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:text="开始录音"

            android:onClick="startRecord"

            />



    <Button android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:text="停止录音"

            android:onClick="stopRecord"

            />



  

</LinearLayout>