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云代码 - android代码库

android 获取dns

2016-04-06 作者: PersonLF举报

[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();
            }
        }
    }


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