An efficient Android utility class for drawing regular polygons on a Canvas
.
Consumers can specify:
- number of sides (โฅ 3);
- center coordinates;
- outer radius (center to vertex);
- corner rounding radius;
- polygon rotation;
- fill/stroke
Paint
.
This video was captured using the sample application in this repository. It provides convenient controls for exploring PolygonDrawingUtil
's capabilities.
-
Specify PolygonDrawingUtil as a dependency in your
build.gradle
file:dependencies { compile 'com.stkent:polygondrawingutil:1.0.0' }
-
Create a new
PolygonDrawingUtil
instance and assign it to a field in your custom view class:private PolygonDrawingUtil polygonDrawingUtil = new PolygonDrawingUtil();
-
Call
polygonDrawUtil.drawPolygon
in youronDraw
method:@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); polygonDrawingUtil.drawPolygon( canvas, numberOfSides, centerX, centerY, polygonRadius, cornerRadius, rotation, polygonPaint); }
Copyright 2017 Stuart Kent
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.