我有以下数据使用MPAndroidChart库以图表格式表示:
Subject Marks
Needs Attention Average Outstanding
Hindi 1/5 2/5 2/5
English 2/7 3/7 2/7
Maths 1/3 1/3 1/3
Science 2/7 2/7 3/7
Physics 2/9 4/9 4/9
Sanskrit 3/7 3/5 0
我想要一个如下图表:
上面的图表只是样本,我想在每个栏中叠加三种颜色(堆叠).我已经制作了一个单独颜色的条形图,但不能制作这样的多色图表.在MPAndroidChart中有可能吗?
解决方法:
这称为“堆积条形图”,可以在MPAndroidChart中使用.
在以下代码生成的MPAndroidChart here的Github存储库中有一个示例Activity:
ArrayList<BarEntry> yVals1 = new ArrayList<BarEntry>();
for (int i = 0; i < size + 1; i++) {
float mult = (size + 1);
float val1 = (float) (Math.random() * mult) + mult / 3;
float val2 = (float) (Math.random() * mult) + mult / 3;
float val3 = (float) (Math.random() * mult) + mult / 3;
yVals1.add(new BarEntry(
i,
new float[]{val1, val2, val3},
getResources().getDrawable(R.drawable.star)));
}
BarDataSet set1;
if (mChart.getData() != null &&
mChart.getData().getDataSetCount() > 0) {
set1 = (BarDataSet) mChart.getData().getDataSetByIndex(0);
set1.setValues(yVals1);
mChart.getData().notifyDataChanged();
mChart.notifyDataSetChanged();
} else {
set1 = new BarDataSet(yVals1, "Statistics Vienna 2014");
set1.setDrawIcons(false);
set1.setColors(getColors());
set1.setStackLabels(new String[]{"Births", "Divorces", "Marriages"});
ArrayList<IBarDataSet> dataSets = new ArrayList<IBarDataSet>();
dataSets.add(set1);
BarData data = new BarData(dataSets);
data.setValueFormatter(new MyValueFormatter());
data.setValueTextColor(Color.WHITE);
mChart.setData(data);
}
mChart.setFitBars(true);
mChart.invalidate();
输出看起来像这样: