Android Programming Implementation Set button background transparent and translucent and picture background transparent method _android

Source: Internet
Author: User
Tags set background

This article describes the Android programming implementation Settings button background transparent and translucent and picture background transparent method. Share to everyone for your reference, specific as follows:

the background of the button or ImageButton is set to be transparent or translucent :

Translucent

Copy Code code as follows:
<button android:background= "#e0000000" .../>

Transparent
Copy Code code as follows:
<button android:background= "#00000000" .../>

The color and opacity (alpha) values are represented by hexadecimal notation. The range of values for any one color is 0 to 255 (00 to FF). For alpha,00 representations are fully transparent, FF represents completely opaque. The order of expressions is "AABBGGRR", where "Aa=alpha" (00 to FF), "Bb=blue" (00 to FF), "Gg=green" (00 to FF), "rr=red" (00 to FF). For example, if you want to apply a blue with an opacity of 50% to an overlay, you should specify the following values: 7fff0000

Set background picture transparency (super Simple), the code is as follows:

View v = Findviewbyid (r.id.content);//Find the ID of the layout you want to set the transparent background
v.getbackground (). Setalpha (100);//0~255 Transparency Value

I hope this article will help you with the Android program.

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