@Override
                    public void onAnimationFinished() {
                        // Set max viewpirt and remove listener.
                        chart.setMaximumViewport(v);
                        chart.setViewportAnimationListener(null);

                    }
Adds lines to data, after that data should be set again with
{@link LineChartView#setLineChartData(LineChartData)}. Last 4th line has non-monotonically x values.
hellocharts-samples/src/lecho/lib/hellocharts/samples/LineChartActivity.java