Android's definition of color and opacity

Source: Internet
Author: User

The color and opacity (alpha) values are expressed in hexadecimal notation. The value range of any color is 0 to 255 (00 to ff ). For Alpha, 00 indicates completely transparent, and FF indicates completely opaque. The expression order is "aabbggrr", where AA = alpha (00 to ff); BB = blue (00
Ff); GG = green (00 to ff); RR = red (00 to ff ). For example, if you want to apply a blue opacity of 50% to a stack, specify the following value: 7fff0000

For example

Translucent <button Android: Background = "# e0000000"
Transparent <button Android: Background = "#00000000".../>

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