Fix #260 => Add colorful marker zones chart demo

Introduces a new chart example 'colorfulMarkerWithZonesChart' to demonstrate high-saturation wave charts with solid and hollow markers. Refactors zone and series element construction for improved readability and locale-aware formatting in CustomStyleChartComposer2.

Author: AAChartModel

sample/src/main/java/com/github/aachartmodel/aainfographics/demo/basiccontent/MainActivity.kt

@@ -110,6 +110,8 @@ class MainActivity : AppCompatActivity() {
                 "connectNullsForSingleAASeriesElement---为单个 AASeriesElement 单独设置是否断点重连",
                 "lineChartsWithLargeDifferencesInTheNumberOfDataInDifferentSeriesElement---不同数据列数据量差异较大的折线图",
                 "customAreasplineChartWithColorfulGradientColorZones---彩色渐变填充区域曲线图",
+
+                "colorfulMarkerWithZonesChart---高饱和度波浪图 — 实心与空心 Marker 对比"
                 ), arrayOf(
                 "customLegendStyle",
                 "drawChartWithOptionsOne",

sample/src/main/java/com/github/aachartmodel/aainfographics/demo/chartcomposer/CustomStyleChartComposer2.kt

@@ -19,66 +19,59 @@ object CustomStyleChartComposer2 {
             for (i in 0 until count) {
                 val y = amplitude * sin((i * step) + phase) + 120
                 val noisyY = y + (Math.random() - 0.5) * noise
-                data.add(String.format("%.2f", noisyY).toDouble())
+                data.add(String.format(java.util.Locale.getDefault(), "%.2f", noisyY).toDouble())
             }
             return data.toTypedArray()
         }
 
         // 色系分区
         val zones = arrayOf(
-            AAZonesElement().apply {
-                value(80.0)
-                color("#25547c")
-            },
-            AAZonesElement().apply {
-                value(110.0)
-                color("#1e90ff")
-            },
-            AAZonesElement().apply {
-                value(140.0)
-                color("#ffd066")
-            },
-            AAZonesElement().apply {
-                value(170.0)
-                color("#04d69f")
-            },
-            AAZonesElement().apply {
-                color("#ef476f")
-            }
+            AAZonesElement()
+                .value(80.0)
+                .color("#25547c"),
+            AAZonesElement()
+                .value(110.0)
+                .color("#1e90ff"),
+            AAZonesElement()
+                .value(140.0)
+                .color("#ffd066"),
+            AAZonesElement()
+                .value(170.0)
+                .color("#04d69f"),
+            AAZonesElement()
+                .color("#ef476f")
         )
 
-        return AAChartModel().apply {
-            chartType(AAChartType.Scatter)
-            title("⚡️高饱和度波浪图 — 实心与空心 Marker 对比")
-            legendEnabled(true)
-            tooltipEnabled(true)
-            series(arrayOf(
-                AASeriesElement().apply {
-                    name("实心数据")
-                    data(generateWaveData(85.0, 0.0, 0.25, 60, 4.0))
-                    zones(zones)
-                    zoneAxis("y")
-                    marker(AAMarker().apply {
-                        symbol(AAChartSymbolType.Circle.value)
-                        radius(6)
-                        lineWidth(1)
-                    })
-                },
-                AASeriesElement().apply {
-                    name("空心数据")
-                    data(generateWaveData(85.0, Math.PI / 2, 0.25, 60, 4.0))
-                    zones(zones)
-                    zoneAxis("y")
-                    marker(AAMarker().apply {
-                        symbol(AAChartSymbolType.Diamond.value)
-                        fillColor("transparent")
-                        lineColor(AANull())
-                        radius(7)
-                        lineWidth(2)
-                    })
-                    dashStyle(AAChartLineDashStyleType.DashDot)
-                }
-            ))
-        }
+        return AAChartModel()
+            .chartType(AAChartType.Scatter)
+            .title("⚡️高饱和度波浪图 — 实心与空心 Marker 对比")
+            .legendEnabled(true)
+            .tooltipEnabled(true)
+            .series(arrayOf(
+                AASeriesElement()
+                    .name("实心数据")
+                    .data(generateWaveData(85.0, 0.0, 0.25, 60, 4.0))
+                    .zones(zones)
+                    .zoneAxis("y")
+                    .marker(AAMarker()
+                        .symbol(AAChartSymbolType.Circle.value)
+                        .radius(6)
+                        .lineWidth(1)
+                    ),
+                AASeriesElement()
+                    .name("空心数据")
+                    .data(generateWaveData(85.0, Math.PI / 2, 0.25, 60, 4.0))
+                    .zones(zones)
+                    .zoneAxis("y")
+                    .marker(AAMarker()
+                        .symbol(AAChartSymbolType.Diamond.value)
+                        .fillColor("transparent")
+                        .lineColor(AANull())
+                        .radius(7)
+                        .lineWidth(2)
+                    )
+                    .dashStyle(AAChartLineDashStyleType.DashDot)
+            )
+            )
     }
 }