MPAndroidChart - First and last bars not rendering correctly

Question

1. In the bar chart I am creating the first and last rows are consistently being cut in half (even if I add additional bars). This also causes the values above the bar

Answer 1

Please use setAxisMinimum and setAxisMaximum, it will work perfectly!

After your BarData is instantiated, you just need

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

There is no need for setFitBars, and the count is BARENTRY size.

Answer 2

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

xAxis.setAxisMinimum(-0.5f);

Like in the answer to this question here:

Answer 3

To answer your questions:

1. In order to properly show your bars you need to fit the bars, like this (don't ask me why it's not enabled by default):

   chart.setFitBars(true)
   

   You can find more information in the BarChart javadocs:

   setFitBars(boolean enabled): Adds half of the bar width to each side of the x-axis range in order to allow the bars of the barchart to be fully displayed.

   If you have a CombinedChart you could use setSpaceMin() and setSpaceMax() to add additional spacing on both ends of the axis:

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

2. It is currently impossible to infuence the value positions rendered on the axis. Creating a ValueFormatter only changes the displayed text, not the actual position of the label.

Answer 4

i just fixed it,settings the x range min, using

  barChart.setFitBars(true);
  barChart.setVisibleXRangeMinimum(barEntries.size());