System.out.println("我点击了按钮");

String urlString = "http://public.dhe.ibm.com/common/ssi/ecm/en/wsd14109usen/WSD14109USEN.PDF";

try {

URL url = new URL(urlString);

HttpURLConnection connection = (HttpURLConnection)

url.openConnection();

connection.setRequestMethod("GET");

connection.setDoInput(true);

connection.setDoOutput(true);

connection.setUseCaches(false);

connection.setConnectTimeout(5000);

connection.setReadTimeout(5000);

//实现连接

connection.connect();

System.out.println("connection.getResponseCode()="+connection.getResponseCode());

if (connection.getResponseCode() == 200) {

InputStream is = connection.getInputStream();

//以下为下载操作

byte[] arr = new byte[1];

ByteArrayOutputStream baos = new ByteArrayOutputStream();

BufferedOutputStream bos = new BufferedOutputStream(baos);

int n = is.read(arr);

while (n > 0) {

bos.write(arr);

n = is.read(arr);

}

bos.close();

String path = Environment.getExternalStorageDirectory()

+ "/download/";

String[] name = urlString.split("/");

path = path + name[name.length - 1];

System.out.println("name="+name);

System.out.println("path="+path);

File file = new File(path);

FileOutputStream fos = new FileOutputStream(file);

fos.write(baos.toByteArray());

fos.close();

//关闭网络连接

connection.disconnect();

System.out.println("下载完成");

if (file.exists()) {

System.out.println("打开");

Uri path1 = Uri.fromFile(file);

Intent intent = new Intent(Intent.ACTION_VIEW);

intent.setDataAndType(path1, "application/pdf");

intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

try {

startActivity(intent);

}

catch (ActivityNotFoundException e) {

System.out.println("打开失败");

}

}

}

} catch (IOException e) {

// TODO: handle exception

System.out.println(e.getMessage());

}