How to make MPAndroidChart RadarChart round

问题

I would like to present some Values inside a Radar Chart. Long-time I was working with AndroidPlot which works great but it doesn't support Radar charts. So I swapped to MPAndroidCharts. But MPCharts only supports angular RadarCharts by default.

I found the following Link in the Issues, but there is no Code given https://github.com/PhilJay/MPAndroidChart/issues/1446

Another Stack Overflow Entry I found is this, but I can't combine it with MPAndroid Charts Radar Chart for Android

At the Android Charts Library: https://github.com/limccn/Android-Charts rounded Charts are mentioned, but I can't find the according Class in Code

Is there already a solution to make MPAndroidCharts RadarCharts round, or any other Library that supports rounded RadarCharts. Thanks for Help

回答1:

As mention in the issue link, you can implement it by yourself, just see https://github.com/PhilJay/MPAndroidChart/blob/c1f6fcebf0c3516e067b34312b283189f909bde5/MPChartLib/src/main/java/com/github/mikephil/charting/charts/RadarChart.java as a reference,

write your RoundRadarChart class to extend the RadarChart
write your RoundRadarChartRenderer, YAxisRendererRoundRadarChart and XAxisRendererRoundRadarChart to extend the RadarChart ones, mainly you should to override the drawXXX functions
use your new renderer classes in your chart class to replace the RadarChart renderers

You need to re-caculate the factory of drawing lines, points and labels

And about the Android-Charts project, you may have a look at https://github.com/limccn/Android-Charts/tree/master/src/src/cn/limc/androidcharts/view. Not sure if the RoundChart is what you want.

回答2:

go to RadarChartRenderer class. and edit the method inside class like below:

protected void drawDataSet(Canvas c, IRadarDataSet dataSet, int mostEntries) {

  ..........................
  ..........................

        mRenderPaint.setStrokeWidth(dataSet.getLineWidth());
        mRenderPaint.setStyle(Paint.Style.STROKE);
        mRenderPaint.setDither(true);                   
        mRenderPaint.setStrokeJoin(Paint.Join.ROUND);  
        mRenderPaint.setStrokeCap(Paint.Cap.ROUND); 
        mRenderPaint.setPathEffect(new CornerPathEffect(30) );  
        mRenderPaint.setAntiAlias(true); 

  ............................
  ............................
}

my results like:

来源：https://stackoverflow.com/questions/57698749/how-to-make-mpandroidchart-radarchart-round

标签

java

android

mpandroidchart

radar-chart