Java tutorial
//package com.java2s; /** * Wire * Copyright (C) 2016 Wire Swiss GmbH * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Paint; public class Main { public static Bitmap getUnreadMarker(int width, int radius, int color) { if (width <= 0) { return null; } Bitmap dest = Bitmap.createBitmap(width, width, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(dest); Paint p = new Paint(); p.setColor(color); p.setAntiAlias(true); canvas.drawCircle(width / 2, width / 2, radius, p); return dest; } }