Understanding Android Themes and Styles

Философия проектирования Android-приложений

Вот здесь эта супер статейка.

if u wanna use a soap...

...u should to read this article
There are information about SOAP serialization.

If you wanna make a thread...

new Thread(new Runnable() {
       public void run() {
               // do stuff that doesn't touch the UI here
       }
}).start();

it was taken from here.

new Thread(new Runnable() {
       public void run() {
               Looper.prepare();
               // do stuff that can touch the UI here
               Looper.loop();
       }
}).start();

Usefull link: widgets

A Visual Guide to Android GUI Widgets
The XML representation of Android UI elements such as Button etc.
Simple use - just "Copy-Paste" =)).

Some article about background...

 
 // an imageview with scaling...
 ImageView topIcon = new ImageView(ctx);
 topIcon.setImageResource(R.drawable.stlogo);
 topIcon.setAdjustViewBounds(true);
 topIcon.setMaxHeight(TopIconMaxHeight);
 topIcon.setMaxWidth(TopIconMaxWidth);
 topIcon.setScaleType(ScaleType.FIT_CENTER);
 topIcon.setAlpha(TopIconAlpha);
 topIcon.setLayoutParams(
     new LayoutParams(LayoutParams.WRAP_CONTENT,
                      LayoutParams.WRAP_CONTENT));

 // clocks...
 AnalogClock clock = new AnalogClock(ctx);
 clock.setBackground(topIcon.getDrawable());

Full topic is here : http://developerlife.com/tutorials/?p=312