无法解析构造函数的barentry(java.lang.string，java.lang.float)

2w3kk1z5 于 2021-07-09 发布在 Java

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我想从下面的json数据创建一个agraph

[{"month":"August 2020","total":"4587175.08"},{"month":"July 2020","total":"9151128.27"},{"month":"June 2020","total":"10859553.16"},{"month":"May 2020","total":"2600435.33"}]

这些数据是从db到我的图形的，但是我在插入entires的代码上面得到的错误如下

public void onResponse(@NotNull Call<List<MonthlySales>> call, @NotNull Response<List<MonthlySales>> response) {
            //check if the response body is null
            if(response.body()!=null){
                List<BarEntry> barEntries = new ArrayList<>();
                for (MonthlySales monthlySales : response.body()) {
                    barEntries.add(new BarEntry(monthlySales.getMonth(),monthlySales.getTotal()));
                }
                BarDataSet dataSet = new BarDataSet(barEntries,"Monthly Sales");
                dataSet.setColors(ColorTemplate.MATERIAL_COLORS);
                BarData data = new BarData(dataSet);
                data.setBarWidth(10f);
                chart.setVisibility(View.VISIBLE);
                chart.animateXY(2000, 2000);
                chart.setData(data);
                chart.setFitBars(true);
                Description description = new Description();
                description.setText("Sales per month");
                chart.setDescription(description);
                chart.invalidate();

我会做错什么？请注意，月份应该是xaxis标签，而总数应该是yaxis标签，如何实现这一点？

Java android mpandroidchart

来源：https://stackoverflow.com/questions/63505219/cannot-resolve-constructor-barentryjava-lang-string-java-lang-float

1条答案

按热度按时间

ezykj2lf1#

java中的构造函数是一种用于初始化对象的特殊方法。在创建类的对象时调用构造函数。

import com.github.mikephil.charting.data.BarDataSet;
import com.github.mikephil.charting.data.BarEntry;

检查 BarEntry 班级。

/**
 * Constructor for normal bars (not stacked).
 *
 * @param x
 * @param y
 */
public BarEntry(float x, float y) {
    super(x, y);
}

public BarEntry(float x, float y, Object data) {
    super(x, y, data);
}

public BarEntry(float x, float y, Drawable icon) {
    super(x, y, icon);
}

public BarEntry(float x, float y, Drawable icon, Object data) {
    super(x, y, icon, data);
}

public BarEntry(float x, float[] vals) {
    super(x, calcSum(vals));

    this.mYVals = vals;

}

public BarEntry(float x, float[] vals, Object data) {
    super(x, calcSum(vals), data);

    this.mYVals = vals;

}

public BarEntry(float x, float[] vals, Drawable icon) {
    super(x, calcSum(vals), icon);

    this.mYVals = vals;

}

public BarEntry(float x, float[] vals, Drawable icon, Object data) {
    super(x, calcSum(vals), icon, data);

    this.mYVals = vals;

}

演示

ArrayList<BarEntry> barEntries = new ArrayList<>();

 barEntries.add(new BarEntry(1f, 0));
 barEntries.add(new BarEntry(2f, 1));

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无法解析构造函数的barentry(java.lang.string，java.lang.float)

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