修改eclipse项目为as项目

app/src/main/java/com/util/DownloadManager.java

@@ -0,0 +1,48 @@
+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;
+//		}
+	}
+}