Question

尝试编译堆积条形图时出现以下错误。我已经复制了用于分组条形图的代码，并且我正在尝试将“堆叠”功能添加到此代码中。错误在下面的代码中的注释中标记，在每个条形图行中，如下例所示： “ BarEntry v1e1 = new BarEntry（0f，new float [] {10,20,20}）; “ 这是代码：

public class StackedBarGraph extends AppCompatActivity{

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

        BarChart chart = (BarChart) findViewById(R.id.mpandroidstackedbargraph );
        BarData data = new BarData(getXAxisValues(),getDataSet());       //!! ignore the complaint - it compiles and works
        chart.setData(data);
        chart.setDescription("My Chart");
        chart.animateXY(2000, 2000);
        chart.invalidate();
    }

    private ArrayList<IBarDataSet> getDataSet() {
        ArrayList<IBarDataSet> dataSets = null;
        ArrayList<BarEntry> valueSet1 = new ArrayList<>();
        BarEntry v1e1 = new BarEntry(0f, new float[]{10,20,20}); // ERROR
        valueSet1.add(v1e1);  //THESE LINES ALL GIVE ABOVE ERROR
        BarEntry v1e2 = new BarEntry(1f, new float[]{20,30,30}); // ERROR
        valueSet1.add(v1e2);
        BarEntry v1e3 = new BarEntry(2f, new float[]{30,50,40}); // ERROR
        valueSet1.add(v1e3);
        BarEntry v1e4 = new BarEntry(3f, new float[]{50,70,50}); // ERROR
        valueSet1.add(v1e4);
        BarEntry v1e5 = new BarEntry(4f, new float[]{70,40,60}); // ERROR
        valueSet1.add(v1e5);
        BarEntry v1e6 = new BarEntry(5f, new float[]{40,30,70}); // Jun
        valueSet1.add(v1e6);

        ArrayList<BarEntry> valueSet2 = new ArrayList<>();
        BarEntry v2e1 = new BarEntry(0, new float[]{10,20,30}); // ERROR
        valueSet2.add(v2e1);
        BarEntry v2e2 = new BarEntry(1, new float[]{10,20,30}); // ERROR
        valueSet2.add(v2e2);
        BarEntry v2e3 = new BarEntry(2, new float[]{10,20,30}); // ERROR
        valueSet2.add(v2e3);
        BarEntry v2e4 = new BarEntry(3, new float[]{10,20,30}); // ERROR
        valueSet2.add(v2e4);
        BarEntry v2e5 = new BarEntry(4, new float[]{10,20,30}); // ERROR
        valueSet2.add(v2e5);
        BarEntry v2e6 = new BarEntry(5, new float[]{10,20,30}); // ERROR
        valueSet2.add(v2e6);

        BarDataSet barDataSet1 = new BarDataSet(valueSet1, "Brand 1");
        barDataSet1.setColor(Color.rgb(0, 155, 0));     // Green
        BarDataSet barDataSet2 = new BarDataSet(valueSet2, "Brand 2");
        barDataSet1.setColor(Color.rgb(0, 155, 155));   // Light Blue

        dataSets = new ArrayList<>();
        dataSets.add(barDataSet1);
        dataSets.add(barDataSet2);
        return dataSets;
    }

    private ArrayList<String> getXAxisValues() {
        ArrayList<String> xAxis = new ArrayList<>();
        xAxis.add("JAN");
        xAxis.add("FEB");
        xAxis.add("MAR");
        xAxis.add("APR");
        xAxis.add("MAY");
        xAxis.add("JUN");
        return xAxis;


    }

Answer 1

BarEntry包含以下构造函数：

BarEntry(float[] vals, int xIndex)

BarEntry(float val, int xIndex)

BarEntry(float[] vals, int xIndex, String label)

BarEntry(float val, int xIndex, Object data)

所以，你做的事情是不可能的。翻转你的论点......

即

BarEntry v1e1 = new BarEntry(new float[]{10,20,20}, 0);

请查看源代码了解详情。

MPAndroidGraph'没有为BarEntry找到合适的构造函数（float，float []）'

1 个答案: