How to set background color of a View

Question

I'm trying to set the background color of a View (in this case a Button).

I use this code:

// set the background to green
v.setBackgroundColor(0x0000FF00 );
v.invalidate();

It causes the Button to disappear from the screen. What am I doing wrong, and what is the correct way to change the background color on any View?

Thanks.

Answer 1

Several choices to do this...

Set background to green:

v.setBackgroundColor(0x00FF00);

Set background to green with Alpha:

v.setBackgroundColor(0xFF00FF00);

Set background to green with Color.GREEN constant:

v.setBackgroundColor(Color.GREEN);

Set background to green defining in Colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>     
    <color name="myGreen">#00FF00</color> 
    <color name="myGreenWithAlpha">#FF00FF00</color> 
</resources>

and using:

v.setBackgroundResource(R.color.myGreen);

and:

v.setBackgroundResource(R.color.myGreenWithAlpha);

or the longer winded:

v.setBackgroundColor(ContextCompat.getColor(getContext(), R.color.myGreen));

and:

v.setBackgroundColor(ContextCompat.getColor(getContext(), R.color.myGreenWithAlpha));

Answer 2

For setting the first color to be seen on screen, you can also do it in the relevant layout.xml (better design) by adding this property to the relevant View:

android:background="#FF00FF00"

Answer 3

mButton.setBackgroundColor(getResources().getColor(R.color.myColor));

Answer 4

You can simple use :

view.setBackgroundColor(Color.parseColor("#FFFFFF"));

Answer 5

You can simple use :

view.setBackgroundColor(Color.rgb(0, 198, 255));

Answer 6

Stating with Android 6 use ContextCompact

        view.setBackgroundColor( ContextCompat.getColor(this, R.color.your_color));