Trying to draw a button: how to set a stroke color and how to "align" a gradient to the bottom without knowing the height?

I am creating a button programmatically. It is rounded and has a gradient background, and works fine and looks nice, but I couldn't do two things I wanted:

  1. Set a 1 pixel stroke with a given color. I tried getPaint().setStroke(), but couldn't figure how to set the stroke color. How should I do it?
  2. Align the gradient to the bottom of the button, no matter what height it has. Is this possible?

For reference, this is the code I'm using:

Button btn = new Button(context);
btn.setPadding(7, 3, 7, 5);

// Create a gradient for the button. Height is hardcoded to 30 (I don't know the height beforehand). 
// I wish I could set the gradient aligned to the bottom of the button.
final Shader shader = new LinearGradient(0, 0, 0, 30,
    new int[] { color_1, color_2 },
    null, Shader.TileMode.MIRROR);

float[] roundedCorner = new float[] { 5, 5, 5, 5, 5, 5, 5, 5 }
ShapeDrawable normal = new ShapeDrawable(new RoundRectShape(roundedCorner, null, null));
normal.setPadding(7, 3, 7, 5);

// Create a state list (I suppressed settings for pressed).
StateListDrawable state_list = new StateListDrawable();
state_list.addState(new int[] { }, normal);


Asked by: Miranda179 | Posted: 25-01-2022

Answer 1

In terms of your first question, I struggled with this as well, and it doesn't look like there are any suitable methods within Drawables themselves (I was using ShapeDrawable) or the Paint class. However, I was able to extend ShapeDrawable and override the draw method, as below, to give the same result:

public class CustomBorderDrawable extends ShapeDrawable {
    private Paint fillpaint, strokepaint;
    private static final int WIDTH = 3; 

    public CustomBorderDrawable(Shape s) {
        fillpaint = this.getPaint();
        strokepaint = new Paint(fillpaint);
        strokepaint.setARGB(255, 0, 0, 0);

    protected void onDraw(Shape shape, Canvas canvas, Paint fillpaint) {
        shape.draw(canvas, fillpaint);
        shape.draw(canvas, strokepaint);

    public void setFillColour(int c){

Answered by: Elise775 | Posted: 26-02-2022

Answer 2

You can use a GradientDrawable with setStroke(3, Color.WHITE) method. To make rounded corners, use this:

setCornerRadii(new float[]{2,2,2,2,2,2,2,2});

Answered by: Marcus190 | Posted: 26-02-2022

Answer 3

Try drawable make a new xml file and set it where you want it..!

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android=""
    android:shape="rectangle" >

    <solid android:color="#e1e1e1" />

        android:color="#808080" />

    <corners android:radius="10dp" />

        android:top="5dp" />


Answered by: Maya653 | Posted: 26-02-2022

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