mpandroidchart - How can I avoid the repeated values in Y-Axis?

Question

I want to avoid the repeated values and the -0 values in Y-Axis, avoiding the image situation.

I have these ideas to solve this, but any solution:

Answer 1

You can set granularity to your required value to prevent the repetition when zoomed.

mBarChart.getAxisLeft().setGranularity(1f);  // y-axis scale will be 0,1,2,3,4....
mBarChart.getAxisLeft().setGranularityEnabled(true);

If you want to set granularity dynamically, then implement IAxisValueFormatter and compare the return value to get the difference and set Granularity to that difference.

    private float yAxisScaleDifference = -1;
    private boolean granularitySet = false;
    //say the values returned by IAxisFormatter is in hundreds: 100, 200, 300...
    mBarChart.getAxisLeft.setValueFormatter(new IAxisValueFormatter() {
    @Override
    public String getFormattedValue(float v, AxisBase axisBase) {
        if(!granularitySet) {

            if(yAxisScaleDifference == -1) {
                yAxisScaleDifference = v;  //10
            }
            else {
                float diff = v - yAxisScaleDifference;  //200 - 100 = 100
                if(diff >= 1000) {
                    yAxisLeft.setGranularity(1000f);  
                }
                else if(diff >= 100) {
                    yAxisLeft.setGranularity(100f);  //set to 100
                }
                else if(diff >= 1f) {
                    yAxisLeft.setGranularity(1f);
                }
                granularitySet =true;
            }
        }
        return val;
    }
});

Another Example:

say Y-Axis returns [1200,3400,8000,9000....]
  first time: 1200
  second time: 3400 - 1200 = 2200
  granularity set to 1000

If the difference is not uniform you have to use array to store the differences and take the average to get the right granularity.