柱状图代码备忘

柱状图代码备忘
public class BarChartActivity extends AppCompatActivity {

private BarChart barChart;
private YAxis leftAxis; //左侧Y轴
private YAxis rightAxis; //右侧Y轴
private XAxis xAxis; //X轴
private Legend legend; //图例
private LimitLine limitLine; //限制线

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bar_chart);

barChart = findViewById(R.id.bar_chart);
initBarChart(barChart);
BarChartBean barChartBean = LocalJsonAnalyzeUtil.JsonToObject(this,
"bar_chart.json", BarChartBean.class);

//处理数据是 记得判断每条柱状图对应的数据集合 长度是否一致
LinkedHashMap<String, List<Float>> chartDataMap = new LinkedHashMap<>();
List<String> xValues = new ArrayList<>();
List<Float> yValue1 = new ArrayList<>();
List<Float> yValue2 = new ArrayList<>();
List<Integer> colors = Arrays.asList(
getResources().getColor(R.color.blue), getResources().getColor(R.color.orange)
);

List<BarChartBean.VtDateValueBean> valueList = barChartBean.getVtDateValue();
List<BarChartBean.VtDateValueAvgBean> avgValueList = barChartBean.getVtDateValueAvg();
Collections.reverse(valueList);

for (BarChartBean.VtDateValueBean valueBean : valueList) {
xValues.add(valueBean.getSYearMonth());
yValue1.add((float) valueBean.getFValue());
}
for (BarChartBean.VtDateValueAvgBean valueAvgBean : avgValueList) {
yValue2.add((float) valueAvgBean.getFValue());
}
chartDataMap.put("标准值", yValue1);
chartDataMap.put("实际值", yValue2);

showBarChart(xValues, chartDataMap, colors);

}

/**
* 初始化BarChart图表
*/
private void initBarChart(BarChart barChart) {
/***图表设置***/
//背景颜色
barChart.setBackgroundColor(Color.WHITE);
//不显示图表网格
barChart.setDrawGridBackground(false);
//背景阴影
barChart.setDrawBarShadow(false);
barChart.setHighlightFullBarEnabled(false);

barChart.setDoubleTapToZoomEnabled(false);
//禁止拖拽
barChart.setDragEnabled(false);
//X轴或Y轴禁止缩放
barChart.setScaleXEnabled(false);
barChart.setScaleYEnabled(false);
barChart.setScaleEnabled(false);
//禁止所有事件
// barChart.setTouchEnabled(false);
//不显示边框
barChart.setDrawBorders(false);

//不显示右下角描述内容
Description description = new Description();
description.setEnabled(false);
barChart.setDescription(description);

//设置动画效果
barChart.animateY(1000, Easing.Linear);
barChart.animateX(1000, Easing.Linear);

/***XY轴的设置***/
//X轴设置显示位置在底部
xAxis = barChart.getXAxis();
xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
xAxis.setGranularity(1f);

leftAxis = barChart.getAxisLeft();
rightAxis = barChart.getAxisRight();
//不绘制 Y轴线条
rightAxis.setDrawAxisLine(false);
//不显示X轴网格线
xAxis.setDrawGridLines(false);
leftAxis.setDrawGridLines(false);
rightAxis.setDrawGridLines(false);


/***折线图例 标签 设置***/
legend = barChart.getLegend();
legend.setForm(Legend.LegendForm.SQUARE);
legend.setTextSize(11f);
//显示位置
legend.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP);
legend.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT);
legend.setOrientation(Legend.LegendOrientation.HORIZONTAL);
//是否绘制在图表里面
legend.setDrawInside(false);
}


/**
* 柱状图始化设置 一个BarDataSet 代表一列柱状图
*
* @param barDataSet 柱状图
* @param color 柱状图颜色
*/
private void initBarDataSet(BarDataSet barDataSet, int color) {
barDataSet.setColor(color);
barDataSet.setFormLineWidth(1f);
barDataSet.setFormSize(15.f);

}

/**
* @param xValues X轴的值
* @param dataLists LinkedHashMap<String, List<Float>>
* key对应柱状图名字 List<Float> 对应每类柱状图的Y值
* @param colors
*/
public void showBarChart(final List<String> xValues, LinkedHashMap<String, List<Float>> dataLists,
@ColorRes List<Integer> colors) {

List<IBarDataSet> dataSets = new ArrayList<>();
int currentPosition = 0;//用于柱状图颜色集合的index

for (LinkedHashMap.Entry<String, List<Float>> entry : dataLists.entrySet()) {
String name = entry.getKey();
List<Float> yValueList = entry.getValue();

List<BarEntry> entries = new ArrayList<>();

for (int i = 0; i < yValueList.size(); i++) {
/**
* 如果需要添加TAG标志 可使用以下构造方法
* BarEntry(float x, float y, Object data)
* e.getData()
*/
entries.add(new BarEntry(i, yValueList.get(i)));
}
// 每一个BarDataSet代表一类柱状图
BarDataSet barDataSet = new BarDataSet(entries, name);
initBarDataSet(barDataSet, colors.get(currentPosition));
dataSets.add(barDataSet);

currentPosition++;
}

//X轴自定义值
xAxis.setValueFormatter(new IAxisValueFormatter() {
@Override
public String getFormattedValue(float value, AxisBase axis) {
return xValues.get((int) Math.abs(value) % xValues.size());
}
});

rightAxis.setValueFormatter(new IAxisValueFormatter() {
@Override
public String getFormattedValue(float value, AxisBase axis) {
return "";
}
});

BarData data = new BarData(dataSets);

/**
* float groupSpace = 0.3f; //柱状图组之间的间距
* float barSpace = 0.05f; //每条柱状图之间的间距 一组两个柱状图
* float barWidth = 0.3f; //每条柱状图的宽度 一组两个柱状图
* (barWidth + barSpace) * 2 + groupSpace = (0.3 + 0.05) * 2 + 0.3 = 1.00
* 3个数值 加起来 必须等于 1 即100% 按照百分比来计算 组间距 柱状图间距 柱状图宽度
*/
int barAmount = dataLists.size(); //需要显示柱状图的类别 数量
//设置组间距占比30% 每条柱状图宽度占比 70% /barAmount 柱状图间距占比 0%
float groupSpace = 0.3f; //柱状图组之间的间距
float barWidth = (1f - groupSpace) / barAmount;
float barSpace = 0f;
//设置柱状图宽度
data.setBarWidth(barWidth);
//(起始点、柱状图组间距、柱状图之间间距)
data.groupBars(0f, groupSpace, barSpace);
barChart.setData(data);

xAxis.setAxisMinimum(0f);
xAxis.setAxisMaximum(xValues.size());
//将X轴的值显示在中央
xAxis.setCenterAxisLabels(true);
}