PolygonDrawingUtil

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Language
Java
Version
N/A
Created
Apr 15, 2017
Updated
Apr 19, 2017
Owner
Stuart Kent (stkent)
Contributor
Stuart Kent (stkent)
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Announcement

PolygonDrawingUtil

An efficient Android utility class for drawing regular polygons on a Canvas.

Consumers can specify:

  • number of sides (≥ 3);
  • center coordinates;
  • outer radius (center to vertex);
  • corner rounding radius;
  • polygon rotation;
  • fill/stroke Paint.

Demo

This video was captured using the sample application in this repository. It provides convenient controls for exploring PolygonDrawingUtil's capabilities.

Getting Started

  1. Specify PolygonDrawingUtil as a dependency in your build.gradle file:

    dependencies {
      compile 'com.stkent:polygondrawingutil:1.0.0'
    }
  2. Create a new PolygonDrawingUtil instance and assign it to a field in your custom view class:

    private PolygonDrawingUtil polygonDrawingUtil = new PolygonDrawingUtil();
  3. Call polygonDrawUtil.drawPolygon in your onDraw method:

    @Override
    protected void onDraw(Canvas canvas) {
      super.onDraw(canvas);
    
      polygonDrawingUtil.drawPolygon(
          canvas,
          numberOfSides,
          centerX,
          centerY,
          polygonRadius,
          cornerRadius,
          rotation,
          polygonPaint);
    }

License

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.