Kotlin IDataSet

Author: hannesa2

MPChartLib/src/main/java/com/github/mikephil/charting/charts/LineChart.kt

@@ -41,13 +41,13 @@ open class LineChart : BarLineChartBase<LineData?>, LineDataProvider {
 
         // Min and max values...
         val yAxisValueFormatter = axisLeft.valueFormatter
-        val minVal = yAxisValueFormatter.getFormattedValue(lineData.yMin, null)
-        val maxVal = yAxisValueFormatter.getFormattedValue(lineData.yMax, null)
+        val minVal = yAxisValueFormatter?.getFormattedValue(lineData.yMin, null)
+        val maxVal = yAxisValueFormatter?.getFormattedValue(lineData.yMax, null)
 
         // Data range...
         val xAxisValueFormatter = xAxis.valueFormatter
-        val minRange = xAxisValueFormatter.getFormattedValue(lineData.xMin, null)
-        val maxRange = xAxisValueFormatter.getFormattedValue(lineData.xMax, null)
+        val minRange = xAxisValueFormatter?.getFormattedValue(lineData.xMin, null)
+        val maxRange = xAxisValueFormatter?.getFormattedValue(lineData.xMax, null)
         val entries = if (numberOfPoints == 1) "entry" else "entries"
         return String.format(
             Locale.getDefault(), "The line chart has %d %s. " +