java - Android how to add transparent gradient to imageview -

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i have android app need change of drawables in listview. have custom adapter can change color of drawable white. want add dissolve (photoshop blending option) transparent effect drawable. attached images below explain graphically (i used blue because easier see).

original image: original green android icon

change color: https://www.dropbox.com/s/7mrs1152hvn2d25/step%201.png

final: https://www.dropbox.com/s/rvtp4q30jjxgd4e/final.png


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