valueformatter / getFormattedValue IndexOutOfBoundsException：索引：7，大小：7 MpAndroidChart in Barchart

Posted 2023-01-08

尝试在valueformatter中创建水平条形图时出现以下错误，但xAxis和mydatasets的大小相同。

这里的奇怪行为是，如果数据集和xAxis的大小为8：8，那么就不会出错，但超出7：7之类的值，它给了我例外。我同时打印了数据集和xAxis arraylist，这是7：7比率的输出：

E/Data: [DataSet, label: NADEC, entries: 1
    Entry, x: 0.0 y: -99.8 , DataSet, label: ALMARAI, entries: 1
    Entry, x: 1.0 y: -3.7 , DataSet, label: CREME CARAMEL, entries: 1
    Entry, x: 2.0 y: -3.7 , DataSet, label: DANETTE, entries: 1
    Entry, x: 3.0 y: -2.9 , DataSet, label: AL MAZRAH, entries: 1
    Entry, x: 4.0 y: 0.0 , DataSet, label: PRIVATE LABEL, entries: 1
    Entry, x: 5.0 y: 7.8 , DataSet, label: RAWABEH, entries: 1
    Entry, x: 6.0 y: 61.5 ]
E/Brands: [NADEC, ALMARAI, CREME CARAMEL, DANETTE, AL MAZRAH, PRIVATE LABEL, RAWABEH]

这里一切都很好吗？这是水平条形图的设置代码：

private fun filterHorizontalBarData(myList: List<ResponseBrandValueGrowthChart>?) 
        try 

            val brand = ArrayList<String>()
            var index = 0f
            var color_index = 0
            val data  = BarData()

            for (item in myList!!) 
                if (item.kPI.equals("Value % Growth") || item.kPI.equals("Volume % growth")) 
                    val kpiValue = ArrayList<BarEntry>()
                    kpiValue.add(BarEntry(index,item.kPIvalue.toFloat()))
                    brand.add(item.brand)
                    val barDataSet = BarDataSet(kpiValue, item.brand)
                    if(color_index<7)
                       barDataSet.setColor(getColor(horizonatal_chart.context, getColorID(color_index)))
                    else
                        barDataSet.setColor(getColorID(color_index))
                    data.addDataSet(barDataSet)
                    index++
                    color_index++
                
            
           setHorizontalChart(data, brand)
        catch (e: Exception)
            e.printStackTrace()
        
    


    private fun setHorizontalChart(data : BarData, brand: ArrayList<String>)

        Log.e("Data ",data.dataSets.toString())
        Log.e("Brands ",brand.toString())

        horizonatal_chart.setDrawBarShadow(false)
        val description = Description()
        description.text = ""
        horizonatal_chart.description = description

        horizonatal_chart.legend.setEnabled(false)
        horizonatal_chart.setPinchZoom(false)
        horizonatal_chart.setDrawValueAboveBar(false)
        horizonatal_chart.setScaleEnabled(false)
        horizonatal_chart.setDrawValueAboveBar(true)

        //Display the axis on the left (contains the labels 1*, 2* and so on)
        val xAxis = horizonatal_chart.getXAxis()
        xAxis.setDrawGridLines(false)
        xAxis.setPosition(XAxis.XAxisPosition.BOTTOM)
        xAxis.setEnabled(true)
        xAxis.setDrawAxisLine(false)
        xAxis.textColor = Color.parseColor("#a1a1a1")

        val yLeft = horizonatal_chart.axisLeft

        //Set the minimum and maximum bar lengths as per the values that they represent
        yLeft.axisMaximum = 100f
        yLeft.axisMinimum = 0f
        yLeft.isEnabled = false

        //Now add the labels to be added on the vertical axis
        xAxis.valueFormatter = IAxisValueFormatter  value, axis -> brand[value.toInt()] 

        val yRight = horizonatal_chart.axisRight
        yRight.setDrawAxisLine(true)
        yRight.setDrawGridLines(false)
        yRight.isEnabled = false

        //Set bar entries and add necessary formatting
        horizonatal_chart.axisLeft.setAxisMinimum(data.yMin)

        data.barWidth = 0.9f
//        val myCustomChartRender = MyCustomChartRender(horizonatal_chart, horizonatal_chart.animator, horizonatal_chart.viewPortHandler)
//        //Add animation to the graph
//        horizonatal_chart.renderer = myCustomChartRender
        horizonatal_chart.animateY(2000)
        horizonatal_chart.data = data
        horizonatal_chart.setTouchEnabled(false)
        horizonatal_chart.invalidate()
    

此代码有什么问题吗？为什么使用mydata和label的大小均为8？请帮帮我！！

更新：异常堆栈跟踪：

java.lang.IndexOutOfBoundsException: Index: 7, Size: 7
        at java.util.ArrayList.get(ArrayList.java:411)
        at com.almaraiquest.almarai.GrowthStoryFragment$setHorizontalChart$1.getFormattedValue(GrowthStoryFragment.kt:321)
        at com.github.mikephil.charting.components.AxisBase.getFormattedLabel(AxisBase.java:489)
        at com.github.mikephil.charting.components.AxisBase.getLongestLabel(AxisBase.java:475)
        at com.github.mikephil.charting.renderer.XAxisRendererHorizontalBarChart.computeSize(XAxisRendererHorizontalBarChart.java:67)
        at com.github.mikephil.charting.renderer.XAxisRenderer.computeAxisValues(XAxisRenderer.java:74)
        at com.github.mikephil.charting.renderer.XAxisRendererHorizontalBarChart.computeAxis(XAxisRendererHorizontalBarChart.java:58)
        at com.github.mikephil.charting.charts.BarLineChartBase.onDraw(BarLineChartBase.java:209)
        at android.view.View.draw(View.java:17071)
        at android.view.View.updateDisplayListIfDirty(View.java:16053)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3754)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3734)
        at android.view.View.updateDisplayListIfDirty(View.java:16016)
        at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:656)
        at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:662)
        at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:770)
        at android.view.ViewRootImpl.draw(ViewRootImpl.java:2828)
        at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2636)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2243)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1278)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6357)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:871)
        at android.view.Choreographer.doCallbacks(Choreographer.java:683)
2019-12-24 07:46:31.169 26673-26673/com.almaraiquest E/AndroidRuntime:     at android.view.Choreographer.doFrame(Choreographer.java:619)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:857)
        at android.os.Handler.handleCallback(Handler.java:751)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6077)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

答案

终于得到了我的解决方案：

 xAxis.valueFormatter = IAxisValueFormatter  value, axis ->
                if (value.toInt() < brand.size) 
                    brand.get(value.toInt())
                 else 
                    "0"
                
            

来源：https://github.com/PhilJay/MPAndroidChart/issues/3253