Android调用MediaScanner进行扫描

import android.content.Context;
import android.media.MediaScannerConnection;
import android.net.Uri;

public class MediaScanner {

    private MediaScannerConnection mediaScanConn = null;

    private MusicSannerClient client = null;

    private String filePath = null;
    
    private String fileType = null;
    
    private String[] filePaths = null;
    /**
     * 然后调用MediaScanner.scanFile("/sdcard/2.mp3");
     * */
    public MediaScanner(Context context) {
        //创建MusicSannerClient
        if (client == null) {

            client = new MusicSannerClient();
        }

        if (mediaScanConn == null) {

            mediaScanConn = new MediaScannerConnection(context, client);
        }
    }

    class MusicSannerClient implements
            MediaScannerConnection.MediaScannerConnectionClient {

        public void onMediaScannerConnected() {
            
            if(filePath != null){
                
                mediaScanConn.scanFile(filePath, fileType);
            }
            
            if(filePaths != null){
                
                for(String file: filePaths){
                    
                    mediaScanConn.scanFile(file, fileType);
                }
            }
            
            filePath = null;
            
            fileType = null;
            
            filePaths = null;
        }

        public void onScanCompleted(String path, Uri uri) {
            // TODO Auto-generated method stub
            mediaScanConn.disconnect();
        }

    }
    
    /**
     * 扫描文件标签信息
     * @param filePath 文件路径 eg:/sdcard/MediaPlayer/dahai.mp3
     * @param fileType 文件类型 eg: audio/mp3  media/*  application/ogg
     * */
    public void scanFile(String filepath,String fileType) {

        this.filePath = filepath;
        
        this.fileType = fileType;
        //连接之后调用MusicSannerClient的onMediaScannerConnected()方法
        mediaScanConn.connect();
    }
    /**
     * @param filePaths 文件路径
     * @param fileType 文件类型
     * */
    public void scanFile(String[] filePaths,String fileType){
        
        this.filePaths = filePaths;
        
        this.fileType = fileType;
        
        mediaScanConn.connect();
        
    }
    
    public String getFilePath() {

        return filePath;
    }

    public void setFilePath(String filePath) {

        this.filePath = filePath;
    }

    public String getFileType() {
        
        return fileType;
    }

    public void setFileType(String fileType) {
        
        this.fileType = fileType;
    }

    
}