Android™

DNS Query A Records

See more DNS Examples

Shows how to perform a DNS query to retrieve A records. Android™

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    CkDns dns = new CkDns();

    CkJsonObject json = new CkJsonObject();
    json.put_EmitCompact(false);

    success = dns.Query("A","microsoft.com",json);
    if (success == false) {
        Log.i(TAG, dns.lastErrorText());
        return;
        }

    Log.i(TAG, json.emit());

    //  Sample response.
    //  Parsing code below..

    //  {
    //    "answer": {
    //      "a": [
    //        {
    //          "name": "microsoft.com",
    //          "ttl": 1528,
    //          "ipv4": "20.112.250.133"
    //        },
    //        {
    //          "name": "microsoft.com",
    //          "ttl": 1528,
    //          "ipv4": "20.231.239.246"
    //        },
    //        {
    //          "name": "microsoft.com",
    //          "ttl": 1528,
    //          "ipv4": "20.76.201.171"
    //        },
    //        {
    //          "name": "microsoft.com",
    //          "ttl": 1528,
    //          "ipv4": "20.70.246.20"
    //        },
    //        {
    //          "name": "microsoft.com",
    //          "ttl": 1528,
    //          "ipv4": "20.236.44.162"
    //        }
    //      ]
    //    }
    //  }

    //  Use this online tool to generate parsing code from sample JSON: 
    //  Generate Parsing Code from JSON

    String name;
    int ttl;
    String ipv4;

    int i = 0;
    int count_i = json.SizeOfArray("answer.a");
    while (i < count_i) {
        json.put_I(i);
        name = json.stringOf("answer.a[i].name");
        ttl = json.IntOf("answer.a[i].ttl");
        ipv4 = json.stringOf("answer.a[i].ipv4");
        i = i + 1;
        }


  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}