MPAndroidChart - the first and last lines do not display correctly

Question

• On the histogram, I create the first and last lines that are sequentially cut in half (even if I add additional bars). This also leads to the fact that the values ​​above the bars are not true. I inflate it inside the fragment.

• The axis also increases by only 0.9 instead of 1. To fix this, do I need to implement the AxisValueFormatter interface?

Picture

code: .java

chart = (BarChart) view.findViewById(R.id.chart1); // Chart settings chart.setDrawGridBackground(false); chart.setHighlightFullBarEnabled(true); chart.setDrawBarShadow(false); chart.setDrawValueAboveBar(true); chart.setDescription(""); // Settings for X-Axis XAxis xAxis = chart.getXAxis(); xAxis.setDrawGridLines(false); xAxis.setEnabled(true); xAxis.setDrawLabels(true); xAxis.setPosition(XAxisPosition.BOTTOM); // Settings for Y-Axis YAxis leftAxis = chart.getAxisLeft(); YAxis rightAxis = chart.getAxisRight(); leftAxis.setAxisMinValue(0f); rightAxis.setAxisMinValue(0f); BARENTRY = new ArrayList<>(); BarEntryLabels = new ArrayList<String>(); BARENTRY.add(new BarEntry(2f, 1)); BARENTRY.add(new BarEntry(3f, 2)); BARENTRY.add(new BarEntry(4f, 3)); BARENTRY.add(new BarEntry(5f, 4)); BARENTRY.add(new BarEntry(6f, 5)); Bardataset = new BarDataSet(BARENTRY, "Projects"); Bardataset.setColors(ColorTemplate.COLORFUL_COLORS); BARDATA = new BarData(Bardataset); chart.setData(BARDATA); chart.invalidate(); // refresh chart.animateY(1500); return view; 

Answer 1

To answer your questions:

• For your bars to display correctly, you need to fit in bars like this (don't ask me why it's not turned on by default):

   chart.setFitBars(true) 

  More information can be found in BarChart javadocs:

  setFitBars(boolean enabled) : adds half the width of the bar to each side of the range along the x axis to allow barcode bars to display fully.

  If you have CombinedChart , you can use setSpaceMin() and setSpaceMax() to add extra distance at both ends of the axis:

   XAxis xAxis = chart.getXAxis(); xAxis.setSpaceMin(barData.getBarWidth() / 2f); xAxis.setSpaceMax(barData.getBarWidth() / 2f); 

• Currently, it is not possible to influence the positions of values ​​displayed on the axis. Creating a ValueFormatter only changes the displayed text, not the actual position of the label.

Answer 2

Use setAxisMinimum and setAxisMaximum , it will work setAxisMaximum fine!

After creating an instance of BarData you just need to

 chart.getXAxis().setAxisMinimum(-data.getBarWidth() / 2); chart.getXAxis().setAxisMaximum(count-data.getBarWidth() / 2);` 

There is no need for setFitBars , but the value is count BARENTRY .

Answer 3

If the problem is only in the first bar, you can use negative values ​​for the minimum axis:

 xAxis.setAxisMinimum(-0.5f); 

As the answer to this question is here :