Android MediaRecorder录制音频

た入场券 2022-02-05 05:55 342阅读 0赞

原帖：http://aina-hk55hk.iteye.com/blog/706793

<?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"));
    		}
    
    	}
    }