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

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.