android.app.DownloadManager对下载地址是不是有要求

package com.android.test;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.DownloadManager;
import android.app.DownloadManager.Request;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
public class MainActivity extends Activity {
	private DownloadManager downloadManager; 
	private SharedPreferences prefs;
	private boolean download_finish;  
	private static final String DL_ID = "downloadId";
	    
	private static final String tag = "linux";
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		Context context=getApplicationContext();
		downloadManager = (DownloadManager)getSystemService(DOWNLOAD_SERVICE);  
		prefs = PreferenceManager.getDefaultSharedPreferences(context); 
		while(!download_finish){
			try {
				startDownload();
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}

	/***下载区域*/
 
	/** 
     * 假如服务器不支持中文路径的情况下需要转换url的编码。 
     * @param string 
     * @return 
     */  
    public String encodeGB2(String string)  
    {  
        //转换中文编码  
        String split[] = string.split("/");  
        for (int i = 1; i < split.length; i++) {  
            try {  
                split[i] = URLEncoder.encode(split[i], "GB2312");  
            } catch (UnsupportedEncodingException e) {  
                e.printStackTrace();  
            }  
            split[0] = split[0]+"/"+split[i];  
        }  
        split[0] = split[0].replaceAll("\+", "%20");//处理空格  
        return split[0];  
    } 

	@SuppressLint("NewApi")
	private void startDownload()
	{
        if(!prefs.contains(DL_ID)) {   
        	String name = "9apps.apk";
//        	String url = "http://gdown.baidu.com/data/wisegame/dc429998555b7d4d/QQ_398.apk";  
        	String url = "http://track.top1ck.com:6566/AdRedirect.aspx?offerid=1711&affid=2335&cid={cid}";  
            //开始下载   
            Uri resource = Uri.parse(url);
            Log.v(tag, "uri "+resource);  
            
            DownloadManager.Request request = new DownloadManager.Request(resource);  
            
            request.setAllowedNetworkTypes(Request.NETWORK_MOBILE | Request.NETWORK_WIFI);   
            request.setAllowedOverRoaming(true);   
            //设置文件类型  
 //           MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();  
 //           String mimeString = mimeTypeMap.getMimeTypeFromExtension(MimeTypeMap.getFileExtensionFromUrl(url));  
 //           request.setMimeType(mimeString); 
             request.setMimeType("application/vnd.android.package-archive");  
            //在通知栏中显示   
            request.setShowRunningNotification(true);  
            request.setVisibleInDownloadsUi(true);  
            //sdcard的目录下的download文件夹  
//            Uri uristr = Uri.parse(ScoreActivity.downloadPath);
//            request.setDestinationUri(uristr);
			request.setDestinationInExternalPublicDir("/Download/", name);  
            request.setTitle(name);   
            long id = downloadManager.enqueue(request);   
            //保存id   
            prefs.edit().putLong(DL_ID, id).commit();   
        } else {   
            //下载已经开始，检查状态  
            queryDownloadStatus();   
        }   
        registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
	}

    private BroadcastReceiver receiver = new BroadcastReceiver() {   
        @Override   
        public void onReceive(Context context, Intent intent) {   
            //这里可以取得下载的id，这样就可以知道哪个文件下载完成了。适用与多个下载任务的监听  
            Log.v("intent", ""+intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0));  
            queryDownloadStatus();   
        }   
    }; 
    @SuppressLint("NewApi")
	private void queryDownloadStatus() {   
        DownloadManager.Query query = new DownloadManager.Query();   
        query.setFilterById(prefs.getLong(DL_ID, 0));   
        Cursor cursor = downloadManager.query(query);   
        if(cursor.moveToFirst()) {  
        	 Log.v(tag, "-- ");  
            int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS)); 
            String downId= cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_ID));
            String title = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_TITLE));
            String address = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
            String size= cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
            String sizeTotal = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
            Log.v(tag, "status "+status);  
            Log.v(tag, "downId "+downId);  
            Log.v(tag, "title "+title);  
            Log.v(tag, "address "+address);  
            Log.v(tag, "size "+size);  
            Log.v(tag, "sizeTotal "+sizeTotal);  
            
            switch(status) {   
	            case DownloadManager.STATUS_PAUSED:
	            	Log.v(tag, "STATUS_PAUSED");  
	                break;
	            case DownloadManager.STATUS_PENDING:   
	                Log.v(tag, "STATUS_PENDING");  
	            case DownloadManager.STATUS_RUNNING:   
	                //正在下载，不做任何事情  
	                Log.v(tag, "STATUS_RUNNING");  
	                break;   
	            case DownloadManager.STATUS_SUCCESSFUL:
	            	download_finish=true;
	            	 Log.v(tag, "STATUS_SUCCESSFUL");  
	            	break;
	            case DownloadManager.STATUS_FAILED: 
	            	download_finish=true;
	            	 Log.v(tag, "STATUS_FAILED");  
	                break;   
            }   
        }  
    }
}