You like your Android Phone or Tablet, it gives you easy portable computing with access to thousands of programs that cover almost any subject. Almost. That App that you wanted doesn’t exist so you’ve invested some time and energy and made it yourself. Now you’d like to publish it so that others can use it, and maybe make a little money on the side. Unfortunately you’ll need to break out the creative talents again and come up with some promotional graphics, because your App will not be listed on Google Play (formerly Android Market) unless those graphics are available. The following table lists the graphic and media images you will need to produce to publish on Google Play.

Notes:

• Provide every asset for a professional app listing, even those that are optional.
• PNG is a Portable Networks Graphics file, file extension normally .png.
• JPG file extension is normally .jpg or .jpeg and is a Joint Photographics Expert Group graphics format.
• All graphics sizes are give as X pixels times Y pixels (i.e. 320×480 is 320 pixels wide by 480 pixels high).
• Alpha determines whether or not the alpha channel is support for the given image being used.
• Do not put a border around the edge of any graphics.
• Use large fonts, bright contrasting colors and crisp designs that are not overly detailed. Particularly for the Feature Image which may be scaled down.

See the article High Resolution App Icon for Google Play Publishing for a tutorial on generating the 512×512 image.

See the article Grabbing an Android Device Screenshot for information on generating the screenshots required.

The Google web page Graphic Assets for your Application has further details.