RadCartesianChart crashes on Android with demo code > java.util.IllegalFormatConversionException: f != java.lang.String

[justintoth]

Environment

• CLI: 8.0.1
• Cross-platform modules: nativescript-ui-chart
• Android Runtime: Android 10, API 29
• iOS Runtime: 12.4.0
• NativeScript-Angular: 11.0.1
• Angular: 11.1.2

Describe the bug
When trying to implement a RadCartesianChart, even using the demo code (https://play.nativescript.org/?template=play-ng&id=8zpRGL&v=4), it errors.

System.err: An uncaught Exception occurred on "main" thread.
System.err: f != java.lang.String
System.err: 
System.err: StackTrace:
System.err: java.util.IllegalFormatConversionException: f != java.lang.String
System.err:     at java.util.Formatter$FormatSpecifier.failConversion(Formatter.java:4403)
System.err:     at java.util.Formatter$FormatSpecifier.printFloat(Formatter.java:2898)
System.err:     at java.util.Formatter$FormatSpecifier.print(Formatter.java:2845)
System.err:     at java.util.Formatter.format(Formatter.java:2524)
System.err:     at java.util.Formatter.format(Formatter.java:2459)
System.err:     at java.lang.String.format(String.java:2870)
System.err:     at com.telerik.widget.chart.engine.axes.categorical.CategoricalAxisModel.getLabelContentCore(CategoricalAxisModel.java:248)
...

To Reproduce

Add the following into a component.tns.html view:

<RadPieChart class="chart" allowAnimation="true" row="0">
            <PieSeries tkPieSeries
               selectionMode="DataPoint"
               expandRadius="0.4"
               outerRadiusFactor="0.7"
               valueProperty="amount"
               legendLabel="type"
               [items]="expensesSource">
            </PieSeries>
            <RadLegendView tkPieLegend position="Right" offsetOrigin="TopRight" width="90" enableSelection="true"></RadLegendView>
        </RadPieChart>

Add the following into a component.ts file:

public favoriteFruits = [
        { type: "🍎", count: 7 },
        { type: "🍌", count: 15 },
        { type: "🍍", count: 12 },
        { type: "🍒", count: 30 },
        { type: "🍇", count: 16 }
    ];

Expected behavior

It should display the chart like iOS does, instead of crashing the app.