Android™

Append New Item to JSON Array

See more JSON Examples

Demonstrates the notations that can be used in a JSON array index to append to the end of an array. 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);

    // Starting in Chilkat v9.5.0.77, the following notations are possible to specify that the value
    // should be appended to the end of the array. (In other words, if the array currenty has N elements, then "-1", "", or "*" 
    // indicate an index of N+1.

    CkJsonObject json = new CkJsonObject();

    json.UpdateInt("lanes[-1]",0);
    json.UpdateInt("lanes[]",1);
    json.UpdateInt("lanes[*]",2);
    json.UpdateInt("lanes[-1]",3);

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

    // Output is:  {"lanes":[0,1,2,3]}

  }

  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."
  }
}