I am experienced developer in android platform but newbie to Sencha touch. I have following questions:
1) How sencha2 handles multiple dimension images, just like in android we have different folders to put different resolution images like HDPI, MDPI, XHDPI, LDPI. (In our application we are planing to keep all the images in device itself)
2) If I have to use image I have to set Height as mandatory parameter, is there any way in sencha just as we have Fill_parent, wrap_content in Android
many of us are not native platform developers so we are not sure what things like 'fill_parent' do...
actually, you don't have to specify the Ext.Img dims, if the parent container layout is 'fit' the image will occupy the available space in its parent container.
maybe you can specify the behavior you need so that the knowledgeable people here can help you better (even though I am sure there are some native devs here to)
as far as image resolution go, do you intend to load different images depending on platform? if so there are several platform detection utils in sencha you can use programmatically or maybe even you can take a look at the new platform based css loading in sencha 2.2 and try to see if you can use it.