(Android™) JSON: Nested Objects

Here we have a JSON object that contains nested JSON objects. This example demonstrates how to access the contents of the nested objects.

{
  "name": "donut",
  "image":
    {
    "fname": "donut.jpg",
    "w": 200,
    "h": 200
    },
  "thumbnail":
    {
    "fname": "donutThumb.jpg",
    "w": 32,
    "h": 32
    }
}

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// 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);

    CkJsonObject json = new CkJsonObject();

    // This is the above JSON with whitespace chars removed (SPACE, TAB, CR, and LF chars).
    // The presence of whitespace chars for pretty-printing makes no difference to the Load
    // method. 
    String jsonStr = "{\"name\": \"donut\",\"image\":{\"fname\": \"donut.jpg\",\"w\": 200,\"h\": 200},\"thumbnail\":{\"fname\": \"donutThumb.jpg\",\"w\": 32,\"h\": 32}}";

    boolean success = json.Load(jsonStr);
    if (success != true) {
        Log.i(TAG, json.lastErrorText());
        return;
        }

    // Get the "image" object.
    CkJsonObject imageObj = json.ObjectOf("image");
    if (json.get_LastMethodSuccess() == false) {
        Log.i(TAG, "image object not found.");
        return;
        }

    Log.i(TAG, "image: fname=" + imageObj.stringOf("fname") + ", width=" + String.valueOf(imageObj.IntOf("w")) + ", height="
         + String.valueOf(imageObj.IntOf("h")));

    // Get the "thumbnail" object.
    CkJsonObject thumbObj = json.ObjectOf("thumbnail");
    if (json.get_LastMethodSuccess() == false) {
        Log.i(TAG, "thumbnail object not found.");
        return;
        }

    Log.i(TAG, "thumbnail: fname=" + thumbObj.stringOf("fname") + ", width=" + String.valueOf(thumbObj.IntOf("w"))
         + ", height=" + String.valueOf(thumbObj.IntOf("h")));


  }

  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."
  }
}