Java tutorial
//package com.java2s; //License from project: Apache License import android.annotation.TargetApi; import android.content.Context; import android.graphics.Outline; import android.os.Build; import android.view.View; import android.view.ViewOutlineProvider; public class Main { @TargetApi(Build.VERSION_CODES.LOLLIPOP) public static void makeCircle(final View view, final int dimenResId) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { ViewOutlineProvider viewOutlineProvider = new ViewOutlineProvider() { @Override public void getOutline(View view, Outline outline) { Context context = view.getContext(); int size = context.getResources().getDimensionPixelSize(dimenResId); outline.setOval(0, 0, size, size); } }; view.setOutlineProvider(viewOutlineProvider); } } }