GraphView within a dialog not working

When I place the below codes (while removing GraphDialog in front of the findViewById) in my MainActivity.java, it works perfectly.

But when I place it inside my dialog "GraphDialog", logcat error pointed to this line (see comment lines)
Appreciate so much if anyone can help me out! Thanks!

//Graph View function
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public void ShowGraphview(View v)
GraphView graphResult = GraphDialog.findViewById(R.id.graph);
GraphDialog.setContentView(R.layout.ivb_popup_graphview);
btn_close = GraphDialog.findViewById(R.id.dia_btn_close);
GraphDialog.setCanceledOnTouchOutside(true);

//Apply Graph view
LineGraphSeries<DataPoint> series = new LineGraphSeries<>(new DataPoint
new DataPoint(0, 6),
new DataPoint(1, 5),
new DataPoint(2, 3),
new DataPoint(3, 2),
new DataPoint(4, 6)
);

//------------This line is where the logcat error pointed to-------
graphResult.addSeries(series);
//------------logcat error pointed to------------------------------

/*Close Button */
btn_close.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
GraphDialog.dismiss();

);
GraphDialog.show();



1 Answer
1

Works when I swap these 2 lines....

GraphView graphResult = GraphDialog.findViewById(R.id.graph);

GraphDialog.setContentView(R.layout.ivb_popup_graphview);


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