Android™

Eval JavaScript Returning String

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Demonstrates getting the completion value of a JavaScript that returns a string. 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;

    //  This example demonstrates getting the completion value of a script,
    //  where the last evaluated expression is a string.

    //  The Javascript run in this example is shown below.

    //  Load the JavaScript from a file.
    CkStringBuilder sbScript = new CkStringBuilder();
    success = sbScript.LoadFile("js_eval_return_string.js","utf-8");
    if (success == false) {
        Log.i(TAG, sbScript.lastErrorText());
        return;
        }

    CkJs js = new CkJs();
    CkJsonObject result = new CkJsonObject();

    //  Run the JavaScript
    //  Eval returns the completion value of the script. This is generally the value of the last evaluated expression.
    //  In this case, the last evaluated expression is a string.
    success = js.Eval(sbScript,result);
    if (success == false) {
        Log.i(TAG, js.lastErrorText());
        return;
        }

    result.put_EmitCompact(false);
    Log.i(TAG, result.emit());

    //  Output:

    //  {
    //    "type": "string",
    //    "value": "Ready for Chilkat.Js"
    //  }

  }

  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."
  }
}

JavaScript

var status = "Ready";
var system = "Chilkat.Js";

// The last statement is an expression
status + " for " + system;