Android Learning Note--9 Pictures + code obfuscation + packaging

One, Android Studio create. 9 file

Note: find a PNG image with a transparent background, change the file name to "Xxxx.9.png" and place it in the drawable file, double-click

Note: One case is to use someone else's. 9 File (see)

Note: Finally compile, see if you can compile successfully! , only the qualified. 9 images will be compiled through.

(some PNG images cannot be changed.) 9 pics, don't know why? ）

Second, the APK packaging process

Android Learning Note--9 Pictures + code obfuscation + packaging