Android realizes the fade in and fade out animation effects in the game

1. Realize the fading animation

It can be implemented in the program in the following ways

Of course, it can also be implemented through the configuration file

First, create an anim folder in the res directory, and then create an XML file gradually. XML in the anim folder xml

The XML file mainly defines the way to implement the gradient

Alpha stands for transparency, 0.0 is completely transparent, 1.0 is completely opaque, and duration refers to excessive time

2. Realize the effect of gradual appearance

The implementation is similar to the above through the configuration file.

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