setting transparency to buttons in android

Question

I want to make Buttons with different transparency levels in android.I have used \"@android:color/transparent\". But it makes the button 100% transparent. I need a

Answer 1

Using XML

If you want to set color and along with that if you want to set transparent then you have to use that color code .

android:color="#66FF0000"    // Partially transparent red
android:alpha="0.25"         // 25% transparent 

Using java

And if you want to set dynamically (java code)then try this,

myButton.getBackground().setAlpha(64);  // 25% transparent

- i.e .INT ranges from 0 (fully transparent) to 255 (fully opaque)

Answer 2

To set the background of button as transparent do:

    android:background="@android:color/transparent"

Answer 3

You can set a background for the button,then achieve the transparency by adjusting the alpha attribute of the button,

android:alpha="0.7"

Makes the opacity 70 percent.

Answer 4

You can set transparency with color. In Android color is broken into 4 8-bit (0-255) segments, with the first 8-bit (0-255) controlling the alpha. For example with the basic color code for Light Gray: D3D3D3. If I want light grey transparent, add 0 and to light grey and get 0D3d3d3 for 100% transparent, or 227(E3 in hex) and get E3D3D3D3 for 50% or 255(FF in Hex) and get FFD3D3D3 for 0%

Answer 5

Use this code in your background color

android:background="?android:attr/selectableItemBackground"

Answer 6

Just Use '@null' to background of button makes transparency in button

android:background="@null"