package com.util;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import android.app.ProgressDialog;
import android.content.Context;

public class DownloadManager {
	public static File getFileFromServer(String path, ProgressDialog pd,Context context)
			throws Exception {
		// 如果相等的话表示当前的sdcard挂载在手机上并且是可用的
//		if (Environment.getExternalStorageState().equals(
//				Environment.MEDIA_MOUNTED)) {
			URL url = new URL(path);
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			conn.setConnectTimeout(5000);
			// 获取到文件的大小
			pd.setMax(conn.getContentLength()/1000);
			InputStream is = conn.getInputStream();
//			File file = new File(Environment.getExternalStorageDirectory(),
//					"updata.apk");//得到sd卡的目录
			File file = new File(context.getCacheDir().getParentFile(),
					"updata.apk"); //放到当前应用程序所在的目录下
			FileOutputStream fos = new FileOutputStream(file);
			BufferedInputStream bis = new BufferedInputStream(is);
			byte[] buffer = new byte[1024];
			int len;
			int total = 0;
			while ((len = bis.read(buffer)) != -1) {
				fos.write(buffer, 0, len);
				total += len;
				// 获取当前下载量
				pd.setProgress(total/1000);
			}
			fos.close();
			bis.close();
			is.close();
			return file;
//		} else {
//			return null;
//		}
	}
}