How to set Corner in Drawable at runtime?

Question

I would like edit the background of layout in runtime. My image drawable is in the class and I would like to set the image with corners like background of the layout. How to do this?

check http://stackoverflow.com/questions/9517434/changing-image-as-rounded-corner — Jaiprakash Soni, Feb 03 '16 at 07:26

score 4 · Answer 1 · edited Sep 07 '17 at 18:18

First get the background from your view using getBackground().
Cast it to a GradientDrawable variable.
Finally call method setCornerRadius(float value) with the value.

setCornerRadius(float value) will set all four corners with the same value.

So it also has the method setCornerRadii(float []radii), which can be used to set corners of all four sides, from top-left, top-right, bottom-right, bottom-left;

setCornerRadii(float []radii)

Specify radii for each of the 4 corners. For each corner, the array contains 2 values, [X_radius, Y_radius]. The corners are ordered top-left, top-right, bottom-right, bottom-left. This property is honored only when the shape is of type RECTANGLE.

GradientDrawable drawable = (GradientDrawable) view.getBackground();
drawable.setCornerRadii(radii);

OR

float values[] = {1.1f, 2.2f, 1.5f, 3.3f};
GradientDrawable drawable = (GradientDrawable) view.getBackground();
drawable.setCornerRadii(values);

This means, top-left corner is 1.1f, top-right corner is 2.2, bottom-right corner is 1.5f and finally bottom-left corner is 3.3f.

score 1 · Answer 2 · edited Sep 07 '17 at 18:19

1

Try this:

GradientDrawable bg = (GradientDrawable) relative_layout.getBackground();
bg.setCornerRadii();

edited Sep 07 '17 at 18:19

hair raisin

2,618
15
13

answered Feb 01 '16 at 10:27

inkedTechie

684
5
13

How I get the relativeLayout background if I want set to relativeLayout background? – Augusto Feb 01 '16 at 10:36
do u want to set background or you want to set rounded corners to the background? – inkedTechie Feb 01 '16 at 10:38
The 2. A image of background with rounded corners :) – Augusto Feb 01 '16 at 10:39
add this line before the two lines `relativeLayout.setBackground("bcakground Image");` – inkedTechie Feb 01 '16 at 10:41
I don't understand, the GradientDrawable have no connection with the background of relativeLayout, is a other variable, other source, other all! – Augusto Feb 01 '16 at 10:48
type casting is necessary to use setCornerRadii method – inkedTechie Feb 01 '16 at 10:49
besides:java.lang.ClassCastException: android.graphics.drawable.BitmapDrawable cannot be cast to android.graphics.drawable.GradientDrawable – Augusto Feb 01 '16 at 10:50
I try: RelativeLayout.setBackground(receita.foto); GradientDrawable drawable = (GradientDrawable) RelativeLayout.getBackground(); drawable.setCornerRadius(5); RelativeLayout.setBackground(drawable); – Augusto Feb 01 '16 at 10:51
for bitmap, you can go to this link http://stackoverflow.com/questions/11012556/border-over-a-bitmap-with-rounded-corners-in-android – inkedTechie Feb 01 '16 at 11:09

score 0 · Answer 3 · answered Jan 29 '16 at 13:31

0

Create drawables resource for your normal and curved background and place them in res/drawable/ folder.

For example:

box.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
</shape>

box_curved.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners android:radius="5dp" />
</shape>

Then at runtime, change background by :

view.setBackground(getResources().getDrawable(R.drawable.box));

or

view.setBackground(getResources().getDrawable(R.drawable.box_curved));

answered Jan 29 '16 at 13:31

TeChNo_DeViL

739
5
11

he wants to set corners of drawable at runtime not to change drawable at runtime my friend. – Vishal Patoliya ツ Jan 29 '16 at 13:33
I believe that too will follow the same logic, just that he needs to use an ImageView with background set dynamically like I said, and src set to the image drawable. – TeChNo_DeViL Jan 29 '16 at 13:38

score 0 · Answer 4 · edited May 23 '17 at 11:52

0

int sdk = android.os.Build.VERSION.SDK_INT;
if(sdk < android.os.Build.VERSION_CODES.JELLY_BEAN) {
    setBackgroundDrawable();
} else {
    setBackground();
}

see : https://stackoverflow.com/a/11947755/3329488

edited May 23 '17 at 11:52

Community

1
1

answered Jan 29 '16 at 13:33

Mo1989

2,374
1
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score 0 · Answer 5 · answered Jan 29 '16 at 13:45

To create Shape Drawable Programetically

public static void createShapeDrawable(View v, int backgroundColor, int borderColor)
    {
        GradientDrawable shape = new GradientDrawable();
        shape.setShape(GradientDrawable.RECTANGLE);
        shape.setCornerRadii(new float[] { 8, 8, 8, 8, 0, 0, 0, 0 }); // set corner Radious 
        shape.setColor(backgroundColor);
        shape.setStroke(3, borderColor);
        v.setBackgroundDrawable(shape);
    }

How to set Corner in Drawable at runtime?

5 Answers5