How to maintain the aspect ratio of the image if imageview first stretch to fill parent

Question

I want to stretch the image to fill width and adjust the height according to width and maintain the aspect ratio. I want it should cover entire width (fillparent) and height of imageview should adjust like in way so that aspect ratio is maintained.

I tried fit_xy but not working in my case. Please help me

Answer 1

There can two possible workarounds even if you set the scale type fit_xy

1) By default Android will scale your image down to fit the ImageView, maintaining the aspect ratio. However, make sure you're setting the image to the ImageView using android:src="..." rather than android:background="...". src= makes it scale the image maintaining aspect ratio, but background= makes it scale and distort the image to make it fit exactly to the size of the ImageView. (You can use a background and a source at the same time though, which can be useful for things like displaying a frame around the main image, using just one ImageView.)

2)You should also see android:adjustViewBounds to make the ImageView resize itself to fit the rescaled image. For example, if you have a rectangular image in what would normally be a square ImageView, adjustViewBounds=true will make it resize the ImageView to be rectangular as well. This then affects how other Views are laid out around the ImageView.

you can change the way it default scales images using the android:scaleType parameter. By the way, the easiest way to discover how this works would simply have been to experiment a bit yourself! Just remember to look at the layouts in the emulator itself (or an actual phone) as the preview in Eclipse is usually wrong.