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我坚持使用MPAndroidChart在图表上添加图例。我想这是因为提供了多个图表。 我已经使用了Google。我已经尝试过这样的东西：MPAndroidChart：无法将图例添加到具有多个图表的lineChart
Legend l = chart.getLegend();
l.setEnabled(true);
寻求你的帮助。 在此先感谢。
这里是ChartActivity：
public class StatisticActivity extends BaseActivity {
private LineChart[] mCharts = new LineChart[4];
private Date mCurrDay;
private Date getStartDay() {
return DateHelper.getStartDay(Calendar.getInstance().getTime());
}
@Override
public void initViews() {
mCharts[0] = (LineChart) findViewById(R.id.chart1);
mCharts[1] = (LineChart) findViewById(R.id.chart2);
mCharts[2] = (LineChart) findViewById(R.id.chart3);
mCharts[3] = (LineChart) findViewById(R.id.chart4);
for (int i = 0; i < mCharts.length; i++) {
LineData data = getData(i);
// add some transparency to the color with "& 0x90FFFFFF"
setupChart(mCharts[i], data, mColors[i % mColors.length]);
}
}
private LineData getData(int category) {
mCurrDay = getStartDay();
ArrayList<Entry> yVals = new ArrayList<>();
int c = Integer.valueOf(DateHelper.convertToString(mCurrDay).substring(11)) + 7;
for (int i = Integer.valueOf(DateHelper.convertToString(mCurrDay).substring(11)); i < c; i++) {
float val = (float) DbHelper.getInstance(context).getDailyStatistic(DateHelper.convertToString(mCurrDay), String.valueOf(category));
yVals.add(new Entry(i, val));
mCurrDay = DateHelper.goToNextDay(mCurrDay);
}
// create a dataset and give it a type
LineDataSet set1 = new LineDataSet(yVals, "DataSet 1");
set1.setFillAlpha(110);
set1.setFillColor(Color.RED);
set1.setMode(LineDataSet.Mode.HORIZONTAL_BEZIER);
// set1.setLineWidth(1.75f);
set1.setDrawCircles(false);
set1.setDrawCircleHole(false);
set1.setDrawFilled(true);
if (Utils.getSDKInt() >= 18) {
// fill drawable only supported on api level 18 and above
Drawable drawable = ContextCompat.getDrawable(this, R.drawable.fade_red);
set1.setFillDrawable(drawable);
} else {
set1.setFillColor(Color.BLACK);
}
set1.setColor(Color.WHITE);
set1.setHighLightColor(Color.WHITE);
set1.setDrawValues(false);
set1.setLabel("Label");
// create a data object with the datasets
LineData data = new LineData(set1);
return data;
}
private int[] mColors = new int[]{
Color.rgb(137, 230, 81),
Color.rgb(240, 240, 30),
Color.rgb(89, 199, 250),
Color.rgb(250, 104, 104)
};
private void setupChart(LineChart chart, LineData data, int color) {
((LineDataSet) data.getDataSetByIndex(0)).setCircleColorHole(color);
// no description text
chart.setDescription("Descr");
chart.setDescriptionColor(Color.WHITE);
chart.setNoDataTextDescription("You need to provide data for the chart.");
chart.setDrawGridBackground(false);
chart.setTouchEnabled(true);
chart.setDragEnabled(true);
chart.setScaleEnabled(true);
chart.setPinchZoom(true);
chart.setBackgroundColor(color);
// set custom chart offsets (automatic offset calculation is hereby disabled)
// chart.setViewPortOffsets(10, 0, 10, 0);
// add data
chart.setData(data);
// get the legend (only possible after setting data)
// Legend l = chart.getLegend();
// l.setEnabled(true);
// l.setForm(Legend.LegendForm.LINE);
// l.setVerticalAlignment(Legend.LegendVerticalAlignment.BOTTOM);
//
l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.CENTER);
// l.setOrientation(Legend.LegendOrientation.HORIZONTAL);
// l.setDrawInside(false);
// l.setPosition(Legend.LegendPosition.BELOW_CHART_LEFT);
// l.setWordWrapEnabled(true);
// l.setYEntrySpace(30);
// l.setXEntrySpace(30);
// l.setFormSize(30);
Legend l = chart.getLegend();
l.setFormSize(10f); // set the size of the legend forms/shapes
l.setForm(Legend.LegendForm.CIRCLE); // set what type of form/shape should be used
l.setPosition(Legend.LegendPosition.BELOW_CHART_LEFT);
l.setTextSize(12f);
l.setTextColor(Color.BLACK);
l.setXEntrySpace(5f); // set the space between the legend entries on the x-axis
l.setYEntrySpace(5f); // set the space between the legend entries on the y-axis
// set custom labels and colors
l.setCustom(new int[]{Color.WHITE}, new String[] {"LEGEND"});
chart.getAxisLeft().setEnabled(true);
// chart.getAxisLeft().setSpaceTop(80);
chart.getAxisLeft().setAxisLineColor(Color.WHITE);
// chart.getAxisLeft().setSpaceBottom(80);
chart.getAxisLeft().setDrawAxisLine(false);
chart.getAxisLeft().setGridColor(Color.WHITE);
chart.getAxisLeft().setTextColor(Color.WHITE);
chart.getAxisLeft().setLabelCount(4, false);
chart.getAxisLeft().setAxisMinValue(0);
chart.getAxisRight().setEnabled(false);
XAxis xAxis = chart.getXAxis();
xAxis.setEnabled(true);
xAxis.setPosition(XAxis.XAxisPosition.TOP);
xAxis.setDrawGridLines(false);
xAxis.setDrawAxisLine(false);
xAxis.setAxisLineColor(Color.WHITE);
xAxis.setTextColor(Color.WHITE);
xAxis.setValueFormatter(new AxisValueFormatter() {
@Override
public String getFormattedValue(float value, AxisBase axis) {
switch ((int) value) {
case 1:
default:
return "0";
}
}
@Override
public int getDecimalDigits() {
return 0;
}
});
// animate calls invalidate()...
chart.animateX(2500);
}
}