🚀 Fix #126

charts/src/main/java/com/github/aachartmodel/aainfographics/aaoptionsmodel/AATooltip.kt

@@ -39,7 +39,7 @@ import com.github.aachartmodel.aainfographics.aatools.AAJSStringPurer
 
 
 class AATooltip {
-    var backgroundColor: String? = null
+    var backgroundColor: Any? = null
     var borderColor: String? = null
     var borderRadius: Float? = null
     var borderWidth: Float? = null
@@ -60,7 +60,7 @@ class AATooltip {
     var positioner: String? = null
     var dateTimeLabelFormats: AADateTimeLabelFormats? = null
 
-    fun backgroundColor(prop: String): AATooltip {
+    fun backgroundColor(prop: Any): AATooltip {
         backgroundColor = prop
         return this
     }

sample/src/main/java/com/github/aachartmodel/aainfographics/demo/chartcomposer/ChartOptionsComposer.kt

@@ -79,6 +79,11 @@ object ChartOptionsComposer {
         //https://github.com/AAChartModel/AAChartCore-Kotlin/issues/61
         aaOptions.chart?.animation = false //turn off animation
 
+        aaOptions.tooltip?.apply {
+             backgroundColor(AAGradientColor.Firebrick)
+            .style(AAStyle.style(AAColor.White))
+        }
+
         aaOptions.yAxis?.labels?.format = "{value} %"//给y轴添加单位
 
         aaOptions.xAxis?.apply {