DroidScript - Live JavaScript on Android

// **************************************************
// * Welcome to the Wonderful World of DroidScript! *
// **************************************************
// 
// DroidScript is a programming tool for Android. The text in this
// window is JavaScript code that can run on your device.
//
// Kindly use Firefox 3.5 or later with this page.
// 
// Click the link "Help & Download" below to download the DroidScript app.
//
// How To: 
// 1) Make sure you are using a web browser that supports XMLHttpRequest
//    Level 2. Firefox 3.5 or later is recommended. Other browsers will not work.
// 2) Install the app http://droidscript.se/DroidScript.apk on your Android device.
// 3) Make sure that both your computer and the device are connected to the 
//    same wireless network, and that wifi networking is enabled on the device.
// 4) Start DroidScript on the device. Press menu button, select "Start server".
// 5) Enter the ip-address shown on the start screen in the text box above.
// 6) Select code you want to run and click the Run button.
// 7) Have fun!

// Toast example program. Select this code and click Run.
var Toast = Packages.android.widget.Toast;
Toast.makeText(
    Activity,
    "Hello World!", 
    Toast.LENGTH_SHORT).show();
    
// Select this code and click Run. It will create a button in
// the server activity.
var button = new Packages.android.widget.Button(Activity);
button.setText("Hello World!");
button.setOnClickListener(function () { 
    button.setText("You Clicked Me!"); })
Activity.setContentView(button);

// You can also run code as a new Activity. Select this code
// and click "Run as Activity". A new DroidScript activity will 
// be created, and the onCreate function is called.
function onCreate(icicle)
{
    var widget = Packages.android.widget;
    var graphics = Packages.android.graphics;
    var font = graphics.Typeface.create(
        graphics.Typeface.SANS_SERIF, 
        graphics.Typeface.BOLD);
    var button = new widget.Button(Activity);
    button.setText("Hello World!");
    button.setTypeface(font);
    button.setTextSize(26);
    button.setBackgroundColor(graphics.Color.rgb(0, 0, 64));
    button.setTextColor(graphics.Color.rgb(255, 255, 255));
    button.setOnClickListener(function () { 
        button.setText("You Clicked Me!"); })
    Activity.setContentView(button);
}

// Also try evaluating these expressions, select and run one line at a time.
// Watch the result in the result area.
1 + 3
22 * 99 - 7
function twice(n) { return n * 2; }
twice(22)