Android™

JavaScript console

See more JavaScript Examples

Demonstrates console output using Chilkat JavaScript. 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 using the built-in console object.
    // The Javascript run in this example is shown below.

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

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

    // Run the JavaScript
    // Results (not console output) go to result.
    // Note: 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 console.log which does not calculate a value. Therefore, it returns undefined.
    success = js.Eval(sbScript,result);
    if (success == false) {
        Log.i(TAG, sbScript.lastErrorText());
        return;
        }

    // We can look at the result, which is "undefined", which is normal and expected.
    Log.i(TAG, result.emit());
    // The result JSON is: {"type":"undefined","value":"undefined"}

    // The console output is retrieved by calling ConsoleOutputSb
    CkStringBuilder sbOut = new CkStringBuilder();
    js.ConsoleOutputSb(sbOut);
    Log.i(TAG, sbOut.getAsString());

  }

  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."
  }
}