Android App UI Design specification

According to the standard is sometimes too complicated, we currently have several practical and efficient practices:
1, the icon satisfies the high definition (HDPI), this kind of icon is generally the small icon, for example: the upper right corner refreshes and so on

2, there is a kind of icon, the interface reuse rate is super high, and the icon medium is large, such as: The bottom of the tab menu icon, the general design size to 3 sets, HDPI, XHDPI, xxhdpi

3, point nine format picture, this for the rules and better symmetry of the button, the most practical icons, solve only need to do a set can be compatible with the various dimensions of the problem, such as: Chat interface chat bubble

4, the general icon needs to compress, if PS design, need to export the Web format PNG best, mobile phone storage space is very valuable.

5, naming mode: General background image to bg_+[module or function in English], general icon Name: ic_+[module or function English], the rest of the naming method: [Module or function in English]. There is a good way to learn: To download the popular review apk to the computer, the suffix apk to zip, and then unzip, find the directory: ~\DAZHONGDIANPING_9201\RES\DRAWABLE-HDPI-V4 view

6, the design of the results of the file storage location: A separate file storage, icon can be stored in a separate folder, to facilitate the development of colleagues update.

Android App UI Design specification