How to programmatically round corners and set random background colors

Instead of setBackgroundColor, retrieve the background drawable and set its color:

v.setBackgroundResource(R.drawable.tags_rounded_corners);GradientDrawable drawable = (GradientDrawable) v.getBackground();if (i % 2 == 0) {  drawable.setColor(Color.RED);} else {  drawable.setColor(Color.BLUE);}

Also, you can define the padding within your tags_rounded_corners.xml:

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">  <corners android:radius="4dp" />  <padding    android:top="2dp"    android:left="2dp"    android:bottom="2dp"    android:right="2dp" /></shape> 

Total programmatic approach to set rounded corners and add random background color to a View.I have not tested the code, but you get the idea.

 GradientDrawable shape =  new GradientDrawable(); shape.setCornerRadius( 8 ); // add some color // You can add your random color generator here // and set color if (i % 2 == 0) {  shape.setColor(Color.RED); } else {  shape.setColor(Color.BLUE); } // now find your view and add background to it View view = (LinearLayout) findViewById( R.id.my_view ); view.setBackground(shape);

Here we are using gradient drawable so that we can make use of GradientDrawable#setCornerRadius because ShapeDrawable DOES NOT provide any such method.

I think the fastest way to do this is:

GradientDrawable gradientDrawable = new GradientDrawable(            GradientDrawable.Orientation.TOP_BOTTOM, //set a gradient direction             new int[] {0xFF757775,0xFF151515}); //set the color of gradientgradientDrawable.setCornerRadius(10f); //set corner radius//Apply background to your viewView view = (RelativeLayout) findViewById( R.id.my_view );if(Build.VERSION.SDK_INT>=16)     view.setBackground(gradientDrawable);else view.setBackgroundDrawable(gradientDrawable);