how to change color of custom state button programmatically

Question

considering How to make the corners of a button round
how to change background color programmatically ?

<?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android" >
 <item android:state_pressed="true" >
 <shape android:shape="rectangle"  >
     <corners android:radius="3dip" />
     <stroke android:width="1dip" android:color="#5e7974" />
     <gradient android:angle="-90" android:startColor="#345953" android:endColor="#689a92"  />            
 </shape>
</item>
<item android:state_focused="true">
 <shape android:shape="rectangle"  >
     <corners android:radius="3dip" />
     <stroke android:width="1dip" android:color="#5e7974" />
     <solid android:color="#58857e"/>       
 </shape>
  </item>  
<item >
<shape android:shape="rectangle"  >
     <corners android:radius="3dip" />
     <stroke android:width="1dip" android:color="#5e7974" />
     <gradient android:angle="-90" android:startColor="#8dbab3" android:endColor="#58857e" />            
 </shape>
 </item>
 </selector>

why not , i want change start color and end color According to user select color — Hamidreza Sadegh, Dec 30 '14 at 08:45

score 3 · Accepted Answer · answered Dec 30 '14 at 08:46

3

You should do like,

button.getBackground().setColorFilter(new LightingColorFilter(0xFFFFFFFF, 0xFFAA0000));

answered Dec 30 '14 at 08:46

Mayank Patel

3,868
10
36
59

1

set default button color to black and : button.getBackground().setColorFilter(0xFFAA0000, PorterDuff.Mode.LIGHTEN); – Hamidreza Sadegh Dec 30 '14 at 10:57

gsanskar · Answer 2 · 2014-12-30T10:27:04.740

0

You can set a background resource to a button by setBackgroundResource method..

Suppose your button is bt and your xml drawable file is button_bg.xml, then you can set the background of button bt to the drawable resource button_bg.xml programmatically as shown below :

bt.setBackgroundResource(R.drawable.button_bg);

Now whenever you want to set the start and end colors of the layout you want, do the following :

View layout_bt = findViewById(R.id.layout_main);//Your layout consisting of the button bt

GradientDrawable drawable_grad = new GradientDrawable(
        GradientDrawable.Orientation.TOP_BOTTOM,
        new int[] {<start_color_here>,<end_color_here>}); //Set the start and end colors here
drawable_grad.setCornerRadius(0f);

layout_bt.setBackgroundDrawable(drawable_grad);

Hope this helps!

edited Dec 30 '14 at 10:27

answered Dec 30 '14 at 08:53

gsanskar

673
5
10

thanks but how to change button color in button_bg.xml – Hamidreza Sadegh Dec 30 '14 at 09:00
Updated my answer, please check again! – gsanskar Dec 30 '14 at 09:05
Method threw 'java.lang.NullPointerException' exception. in layout_bt.setBackgroundDrawable(drawable_grad); – Hamidreza Sadegh Dec 30 '14 at 09:29
Please try **setBackgroundResource** instead – gsanskar Dec 30 '14 at 09:43
Thanks , but setBackgroundResource need input id(int) – Hamidreza Sadegh Dec 30 '14 at 10:26

how to change color of custom state button programmatically

2 Answers2