[TIMOB-6908] Android: png image file transparency problem

Problem

On Android, PNGs containing transparency/semi-transparency (such as shadows and glow) look very bad compared to both the iPhone version and the Photoshop reference mockup (see attached screenshots). The PNGs are normal 32bit (RGBA) straight from Photoshop and looks fine in iPhone simulator. On Android both the emulator and device (HTC Legend) are affected.

Test case

The test is made up of a Window with a background PNG, and two child views with unscaled background PNG's with both solid and semi-transparent content. Assets are attached

var win = Ti.UI.createWindow({
    backgroundImage:'bg.png',
});
 
var shadow = Ti.UI.createView({
    backgroundImage:'shadow.png',
    width:'179dp',
    height:'179dp',
    top:'25dp',
});
 
var glow = Ti.UI.createView({
    backgroundImage:'glow.png',
    width:'189dp',
    height:'189dp',
    bottom:'15dp',
});
 
win.add(shadow);
win.add(glow);
win.open();

Discussions

Q&A: [severe android png rendering bug](http://developer.appcelerator.com/question/127038/severe-android-png-rendering-bug)