Question

我一直试图在Android应用程序上绘制两个ArrayLists的图表。我从ArrayList获得的值成功，但我不能调用方法来获取值。

我创建了这个从我的数据库中获取值的方法：

public DataPoint[] setData(String data)
{
    TextView editText4;
    editText4 = (TextView) findViewById(R.id.editText4);
    String[] lucas = data.split(",");

    List<String> ok = new ArrayList<String>(Arrays.asList(lucas));
    List<String> yes = new ArrayList<String>(Arrays.asList(lucas));

    int n = ok.size();     //to find out the no. of data-points
    editText4.setText(String.valueOf(n));
    DataPoint[] values = new DataPoint[n];     //creating an object of type DataPoint[] of size 'n'
    for (int i = 0; i < n; i++)
     {
        DataPoint v = new DataPoint(Double.parseDouble(ok.get(i)), Double.parseDouble(yes.get(i)));
        values[i] = v;
     }
     return values;
 }

我的问题在于setData（无法解析符号＆＃39; setData＆＃39;）：

GraphView graph;
PointsGraphSeries<DataPoint> series;       //an Object of the PointsGraphSeries for plotting scatter graphs
graph = (GraphView) findViewById(R.id.graph);
series = new PointsGraphSeries<>(setData);   //initializing/defining series to get the data from the method 'data()'
graph.addSeries(series);                   //adding the series to the GraphView
series.setShape(PointsGraphSeries.Shape.POINT);
series.setSize(6);

Answer 1

在查找代码时，您会看到方法setData（字符串数据）但在series = new PointsGraphSeries<>(setData);中您正在调用变量。请将setData（String data）方法的结果分配给局部变量，然后在提到的代码行中使用它。

如何调用方法来绘制Android图形

1 个答案: