tsChart is not Resolved in Android Studio

[HazyIAm]

I'm trying to get thingspeak.com graphs on my mobile app that I am making. I am following: https://github.com/MacroYau/ThingSpeakAndroid
This tells me that to get the graphs of the channel I have to use :

LineChartView chartView = (LineChartView) findViewById(R.id.chart);
tsChart = new ThingSpeakLineChart(CHANNEL_ID, FIELD_ID);
tsChart.setListener(new ThingSpeakLineChart.ChartDataUpdateListener() {
@OverRide
public void onChartDataUpdated(long channelId, int fieldId, String title, LineChartData lineChartData, Viewport maxViewport, Viewport initialViewport) {
chartView.setLineChartData(lineChartData);
chartView.setMaximumViewport(maxViewport);
chartView.setCurrentViewport(initialViewport);
}
});
tsChart.loadChartData();

However I'm getting the error : "Cannot resolve symbol tsChart".
Why is that?
I have added the library and included all dependencies.

[HazyIAm]

Found the solution.......