Android MediaRecorder录制音频

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
	package="com.Aina.Android" android:versionCode="1" android:versionName="1.0">
	<application android:icon="@drawable/icon" android:label="@string/app_name">
		<activity android:name=".Test" android:label="@string/app_name">
			<intent-filter>
				<action android:name="android.intent.action.MAIN" />
				<category android:name="android.intent.category.LAUNCHER" />
			</intent-filter>
		</activity>

	</application>
	<uses-permission android:name="android.permission.RECORD_AUDIO">
	</uses-permission>
	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

</manifest> 

package com.Aina.Android;

import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class Test extends Activity {
	/** Called when the activity is first created. */
	private ListView mListView = null;
	private Button btn_start = null;
	private Button btn_stop = null;
	private MediaRecorder mMediaRecorder = null;
	private List<String> rec = new ArrayList<String>();// 存放录音文件
	private File home = null;
	private File path = null;
	private String temp = "recaudio_";// 临时文件前缀

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		mListView = (ListView) this.findViewById(R.id.ListView01);
		btn_start = (Button) this.findViewById(R.id.Button01);
		btn_stop = (Button) this.findViewById(R.id.Button02);
		// 是否存在SD卡
		if (Environment.getExternalStorageState().equals(
				Environment.MEDIA_MOUNTED)) {
			home = Environment.getExternalStorageDirectory();
			MusicList();
		} else {
			Toast.makeText(this, "请先插入SD卡", Toast.LENGTH_LONG).show();
			return;
		}
		btn_start.setOnClickListener(new Button.OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				try {
					// 创建录音临时文件
					path = File.createTempFile(temp, ".amr", home);
					setTitle("=="+path.getAbsolutePath());
					mMediaRecorder = new MediaRecorder();
					
					mMediaRecorder
							.setAudioSource(MediaRecorder.AudioSource.MIC);// 设置数据来源，麦克风
					mMediaRecorder
							.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);// 设置格式
					mMediaRecorder
							.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);// 设置编码
					mMediaRecorder.setOutputFile(path.getAbsolutePath());// 设置输出文件路径
					mMediaRecorder.prepare();
					mMediaRecorder.start();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

		});
		btn_stop.setOnClickListener(new Button.OnClickListener() {

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

		});
		mListView.setOnItemClickListener(new OnItemClickListener(){

			public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
					long arg3) {
				// TODO Auto-generated method stub
				String path = home+File.separator+rec.get(arg2);
				File f = new File(path);
				PlayMusic(f);
			}
			
		});
	}

	/**
	 * 显示列表
	 */
	public void MusicList() {
		File[] f = home.listFiles(new MusicFilter());
                  rec.clear();
		for (int i = 0; i < f.length; i++) {
			File file = f[i];
			rec.add(file.getName());
		}
		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
				android.R.layout.simple_list_item_1, rec);
		mListView.setAdapter(adapter);
	}

	/**
	 * 播放录音文件
	 * @param file
	 */
	public void PlayMusic(File file){
		Intent intent = new Intent();
		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		intent.setAction(Intent.ACTION_VIEW);
		intent.setDataAndType(Uri.fromFile(file), "audio");
		this.startActivity(intent);
	}
	class MusicFilter implements FilenameFilter {

		public boolean accept(File dir, String filename) {
			// TODO Auto-generated method stub
			return (filename.endsWith(".amr"));
		}

	}
}

评论

1 楼 yong7356 2013-09-29  

学习了。。。。。。。。。