I have added the Icons and Images to the respective folder (drawable-mdpi,drawable-hdpi,drawable-xhdpi,drawable-xxhdpi) in the andriod project by following the guide line given in the android development documents.But the the images are not rendering as per the expectation.
below are the sizes which I am using for different android screens.
drawable-mdpi 25 x25
drawable-hdpi 38 x 38
drawable-xhdpi 51 x 51
drawable-xxhdpi 76 x76