android 获取dns

[android]代码库

/**
	 * 获取WIFI的DNS
	 * 
	 * @return
	 */
	public static String getDns() {
		int BUFFER_SIZE = 1024;
		Process localProcess = null;
		InputStream in = null;

		try {
			localProcess = Runtime.getRuntime().exec("getprop net.dns1");  // 获取wifi的dns
			in = localProcess.getInputStream();

			ByteArrayOutputStream outStream = new ByteArrayOutputStream();
			byte[] data = new byte[BUFFER_SIZE];
			int count = -1;
			while ((count = in.read(data, 0, BUFFER_SIZE)) != -1) {
				outStream.write(data, 0, count);
			}

			data = null;
			String dns = new String(outStream.toByteArray(), "UTF-8");
			if(dns.contains("\n")){
				dns = dns.replace("\n", "");
			}
			return dns;
		} catch (Exception e) {
			e.printStackTrace();

			return "";
		} finally {
			localProcess.destroy();
			try {
				in.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}