BarChart柱狀圖（多組）

多組柱狀圖.png

 <com.github.mikephil.charting.charts.BarChart
        android:id="@+id/chart"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="20dp" />

首先在activity中對(duì)柱狀圖的屬性進(jìn)行設(shè)置
其中mChart是對(duì)柱狀圖的樣式及效果進(jìn)行設(shè)置，Legend是圖表標(biāo)題圖例位置樣式的設(shè)置

        /***圖表設(shè)置***/
        //背景顏色
        chart.setBackgroundColor(Color.WHITE);
        //不顯示圖表網(wǎng)格
        chart.setDrawGridBackground(false);
        //背景陰影
        chart.setDrawBarShadow(false);
        chart.setHighlightFullBarEnabled(false);
        //顯示邊框
        chart.setDrawBorders(true);
        Matrix m = new Matrix();
        m.postScale(10f, 1f);//兩個(gè)參數(shù)分別是x,y軸的縮放比例。例如：將x軸的數(shù)據(jù)放大為之前的1.5倍
        chart.getViewPortHandler().refresh(m, chart, false);//將圖表動(dòng)畫(huà)顯示之前進(jìn)行縮放
        chart.animateX(1000);
        /***XY軸的設(shè)置***/
        //X軸設(shè)置顯示位置在底部
        xAxis = chart.getXAxis();
        xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
        xAxis.setAxisMinimum(0f);
        xAxis.setGranularity(1f);
        xAxis.setCenterAxisLabels(true);//設(shè)置標(biāo)簽居中

        leftAxis = chart.getAxisLeft();
        rightAxis = chart.getAxisRight();
        //保證Y軸從0開(kāi)始，不然會(huì)上移一點(diǎn)
        leftAxis.setAxisMinimum(0f);
        rightAxis.setAxisMinimum(0f);

        /***折線圖例 標(biāo)簽 設(shè)置***/
        legend = chart.getLegend();
        legend.setForm(Legend.LegendForm.LINE);
        legend.setTextSize(11f);
        //顯示位置
        legend.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP);
        legend.setHorizontalAlignment(Legend.LegendHorizontalAlignment.CENTER);
        legend.setOrientation(Legend.LegendOrientation.HORIZONTAL);
        //是否繪制在圖表里面
        legend.setDrawInside(false);

在設(shè)置好柱狀圖的樣式及效果之后，對(duì)其中的數(shù)據(jù)進(jìn)行設(shè)置,list為數(shù)據(jù)值
屬性為T(mén)ime,OneNum,TwoNum,ThreeNum
多組主要設(shè)置為

1. float groupSpace = 0.04f;
2. float barSpace = 0.02f;
3. float barWidth = 0.3f;
   三個(gè)數(shù)值相加小于1

        float groupSpace = 0.04f;
        float barSpace = 0.02f;
        float barWidth = 0.3f;
        List<BarEntry> barEntryList = new ArrayList();
        for (int i = 0; i < list.size(); i++) {
            if (list.getOneNum()==null||list.getOneNum()==0)
                barEntryList.add(new BarEntry((float) i, 0f));
            else
                barEntryList.add(new BarEntry((float) i, list.getOneNum()));
        }
        BarDataSet dataset1 = new BarDataSet(barEntryList, "數(shù)據(jù)一");
        dataset1.setColor(Color.rgb(255, 0, 0));
        List<BarEntry> barEntryList1 = new ArrayList();
        for (int i = 0; i < list.size(); i++) {
            if (list.getTwoNum()==null||list.getTwoNum()==0)
                barEntryList1.add(new BarEntry((float) i, 0f));
            else
                barEntryList1.add(new BarEntry((float) i, list.getTwoNum()));
        }
        BarDataSet dataset2 = new BarDataSet(barEntryList1, "數(shù)據(jù)二");
        dataset2.setColor(Color.rgb(0, 255, 0));
        List<BarEntry> barEntryList2 = new ArrayList();
        for (int i = 0; i < list.size(); i++) {
            if (list.getThreeNum()==null||list.getThreeNum()==0)
                barEntryList2.add(new BarEntry((float) i, 0f));
            else
                barEntryList2.add(new BarEntry((float) i,list.getThreeNum()));
        }
        BarDataSet dataset3 = new BarDataSet(barEntryList2, "數(shù)據(jù)三");
        dataset3.setColor(Color.rgb(0, 0, 255));
        final LevelOneEntity levelOneEntity1 = levelOneEntity;
        List<IBarDataSet> dataSetList = new ArrayList<>();
        dataSetList.add(dataset1);
        dataSetList.add(dataset2);
        dataSetList.add(dataset3);
        BarData data = new BarData(dataSetList);
        data.setValueTextSize(10f);
        data.setBarWidth(0.9f);

設(shè)置x軸標(biāo)簽樣式

        xAxis.setDrawGridLines(false);
        xAxis.setGranularity(1f);
        xAxis.setLabelCount(list.size());
        xAxis.setCenterAxisLabels(true);//設(shè)置標(biāo)簽居中

設(shè)置圖表柱狀圖樣式寬度

        chart.setData(data);
        chart.getBarData().setBarWidth(barWidth);
        chart.getXAxis().setAxisMinimum(0);
        chart.getXAxis().setAxisMaximum(chart.getBarData().getGroupWidth(groupSpace, barSpace) *list.size() + 0);
        chart.groupBars(0, groupSpace, barSpace);
        chart.invalidate();                    //將圖表重繪以顯示設(shè)置的屬性和數(shù)據(jù)
        chart.getXAxis().setValueFormatter(new IAxisValueFormatter() {
            @Override
            public String getFormattedValue(float value, AxisBase axis) {
                return double2String(value, list);
            }
        });

X軸數(shù)字轉(zhuǎn)中文

 public String double2String(float f, List list) {
        String s = "";
        if (f >= 0 && f < list.size())
            s = list.getName();
        return s;
    }