Java tutorial
//package com.java2s; /* * Copyright (C) 2010 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Path; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF; public class Main { private static void drawTouchIconToCanvas(Bitmap touchIcon, Canvas canvas, Rect iconBounds) { Rect src = new Rect(0, 0, touchIcon.getWidth(), touchIcon.getHeight()); // Paint used for scaling the bitmap and drawing the rounded rect. Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); paint.setFilterBitmap(true); canvas.drawBitmap(touchIcon, src, iconBounds, paint); // Construct a path from a round rect. This will allow drawing with // an inverse fill so we can punch a hole using the round rect. Path path = new Path(); path.setFillType(Path.FillType.INVERSE_WINDING); RectF rect = new RectF(iconBounds); rect.inset(1, 1); path.addRoundRect(rect, 8f, 8f, Path.Direction.CW); // Reuse the paint and clear the outside of the rectangle. paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR)); canvas.drawPath(path, paint); } }