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.

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.