To use a PSD (PhotoShop Document) form in android, do follow this guide:
tl;dr Use gimp to extract the different layers into seperate png files, then in android studio, import the images as drawables.
To extract the layers from the psd file as images, and thus creating an image folder, you need to have gimp installed. From gimp, you need to install a gimp plugin called Export Layers. The wiki for the github page explains how to do the actual extraction of the layers.
To import into android studio, you need to install a plugin called Android Drawable Importer. Once the plugin is installed and you have restarted Android Studio, right-click your drawable folder -> New -> Batch Drawable Import. From here, select the folder you have obtained from gimp and select the options you want.
Note: the image file names can only contain word characters i.e. has to match this regex, otherwise android studio won't accept it