Question

我试图在x轴上显示日期和时间，但它不是get.also它将x轴返回为空白。

我的代码： -

ArrayList<Entry> entries = new ArrayList<>();
        entries.add(new Entry(1479249799770L, 98.3f));
        entries.add(new Entry(1479249799771L, 58.3f));
        entries.add(new Entry(1479249799772L, 78.3f));
        entries.add(new Entry(1479249799773L, 48.3f));
        entries.add(new Entry(1479249799774L, 68.3f));

        LineDataSet set1;

        // create a dataset and give it a type
        set1 = new LineDataSet(entries, "DataSet 1");
        set1.setFillAlpha(110);

        set1.setColor(Color.BLACK);
        set1.setCircleColor(Color.BLACK);
        set1.setLineWidth(1f);
        set1.setCircleRadius(3f);
        set1.setDrawCircleHole(false);
        set1.setValueTextSize(9f);
        set1.setDrawFilled(false);

        mChart.getXAxis().setPosition(XAxis.XAxisPosition.BOTTOM);
        mChart.getXAxis().setValueFormatter(new MyXAxisValueFormatter());
        mChart.setViewPortOffsets(60, 0, 50, 60);

        //ArrayList<ILineDataSet> dataSets = new ArrayList<>();
        //dataSets.add(set1);

        //LineData data = new LineData(dataSets);
        //LineDataSet set = new LineDataSet(null, null);
        LineData data = new LineData();
        data.addDataSet(set1);
        mChart.setData(data);

还添加了MyAxisValueFormatter类来格式化x轴值： -

public class MyXAxisValueFormatter implements IAxisValueFormatter {
    @Override
    public String getFormattedValue(float value, AxisBase axis) {
        // Simple version. You should use a DateFormatter to specify how you want to textually represent your date.

        Log.d("",""+value);
        Date date = new Date((long) value);
        SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
        String dateString = formatter.format(date);
        return dateString;
    }
    @Override
    public int getDecimalDigits() {
        return 0;
    }
}

Thanks.Suggest me在上面的代码中我做错了什么？

Answer 1

这些是我的新条目x值，即时间戳条目错误。我在下面尝试并获得完美的图表。

 entries.add(new Entry(1451660400L, 98.3f));
    entries.add(new Entry(1451685600L, 58.3f));
    entries.add(new Entry(1451721600L, 78.3f));
    entries.add(new Entry(1451743200L, 48.3f));
    entries.add(new Entry(1451761200L, 68.3f));

并将x值标签作为日期。

作为标签的日期和时间没有进入mpandroidchart库中的x轴（折线图）？

1 个答案: