In MPAndroidChart, how to add the click event for the each Bar in Barchart?

问题

Am using MPAndroidChart library to implemented the Barchart, How to implement the click listener for each bar in Barchart.I want to show the clicked barvalue in Toast.How to implement this one ?

mChart = (BarChart) findViewById(R.id.chart1);
mChart.setDrawYValues(true);
mChart.setDrawValueAboveBar(true);
mChart.setDescription("");
mChart.setMaxVisibleValueCount(10);
mChart.set3DEnabled(false);

mChart.setPinchZoom(false);
mChart.setUnit(" mg/dL");
mChart.setDrawGridBackground(false);
mChart.setDrawHorizontalGrid(true);
mChart.setDrawVerticalGrid(false);
mChart.setValueTextSize(10f);
mChart.setDrawBorder(false);


XLabels xl = mChart.getXLabels();
xl.setPosition(XLabelPosition.BOTTOM);
xl.setSpaceBetweenLabels(10);
xl.setCenterXLabelText(true);

YLabels yl = mChart.getYLabels();
yl.setLabelCount(8);
yl.setPosition(YLabelPosition.LEFT);

setData();

Legend l = mChart.getLegend();
l.setPosition(LegendPosition.BELOW_CHART_RIGHT);
l.setFormSize(8f);
l.setXEntrySpace(4f);

mChart.animateY(3000);


private void setData() {

    ArrayList<String> xVals = new ArrayList<String>();
    xVals.add("F");
    xVals.add("PP");
    xVals.add("U");
    xVals.add("C");
    xVals.add("TC");
    xVals.add("Tri");
    xVals.add("HDL");
    xVals.add("LDL");
    xVals.add("VLDL");

    ArrayList<BarEntry> yVals1 = new ArrayList<BarEntry>();
    yVals1.add(new BarEntry(95, 0));
    yVals1.add(new BarEntry(99, 1));
    yVals1.add(new BarEntry(19, 2));
    yVals1.add(new BarEntry((float) 1.21, 3));
    yVals1.add(new BarEntry(250, 4));
    yVals1.add(new BarEntry(323, 5));
    yVals1.add(new BarEntry(47, 6));
    yVals1.add(new BarEntry(135, 7));
    yVals1.add(new BarEntry(68, 8));


    BarDataSet set1 = new BarDataSet(yVals1, "");
    //set1.setColors(ColorTemplate.VORDIPLOM_COLORS);
    set1.setColors(new int[]{R.color.green,R.color.green,R.color.green,R.color.green,R.color.margin,R.color.red,R.color.green,R.color.green,R.color.green},getApplicationContext());
    set1.setBarSpacePercent(50f);

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

    BarData data = new BarData(xVals, dataSets);

    mChart.setData(data);
}

回答1:

Try implementing OnChartValueSelectedListener present in the mpandroidchart library

回答2:

You need to implement OnChartValueSelectedListener. Click here for the javadoc for that class.

There is an example from the MPAndroidChart demo project here (using MPAndroidChart 3.0.2)

@Override
public void onValueSelected(Entry e, Highlight h) {
    Log.i("VAL SELECTED",
            "Value: " + e.getY() + ", xIndex: " + e.getX()
                    + ", DataSet index: " + h.getDataSetIndex());
}

@Override
public void onNothingSelected() {
}

来源：https://stackoverflow.com/questions/28314966/in-mpandroidchart-how-to-add-the-click-event-for-the-each-bar-in-barchart

标签

android

mpandroidchart