Try to avoid using JPG images in Android development

Because JPG is prone to distortion, it is best to avoid using. jpg images in Android development, instead of using. png images, which uses lossless data compression algorithms derived from LZ77.

In fact, Google has hinted at this:

Found no, these icons are in PNG format under Res. This means that Google recommends using a PNG-formatted image.

Write this, think of a small thing, children's shoes Q: When naming an activity corresponding layout file, how to calculate the specification.

In fact, when we create a new activity, we can also see some clues:

If you create a mainactivity then the default layout file name is: Activity_main
Such a designation is also considered to be a comparative norm and is recommended.

Occasionally, when we meet a small thing not sure how to do it, we might as well look at the way Google uses itself