Question

In my activity there are 3 buttons. By clicking on the first button, I want a dialog to appear with a graph (in the layout itself it works fine).

 btn1 = (Button)findViewById(R.id.btn1);
        btn1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                 dialog = new Dialog(ChartsDuration.this);
                 dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
                 dialog.setContentView(R.layout.dialog_charts1);     

// code to show a graph. Here I have a function that calls  drawChartAll(), 
// but since the layout is declared outside the dialog it cannot render it to the
// linearlayout, and my graph1 linearlayout will be empty.

                 dialog.show();


            }
        });

Tha graph uses data that are queried in functions outside like

public void drawChartAll()
   {
//blablabla and this is how I define the layout and render the graph to it:
LinearLayout layout = (LinearLayout) findViewById(R.id.graph1);   
mChartView = ChartFactory.getBarChartView(ChartsDuration.this, buildBarDataset(titles, values),renderer,Type.DEFAULT);
mChartView.setBackgroundColor(renderer.getBackgroundColor());
layout.addView(mChartView);
}

So without the dialog, I can easily show the graph in the graph1 LinearLayout e.g below the buttons, because they are “on the same levels”, but I want to show the graph in a dialog opened by clicking on a button. Because if I were in a dialog I would do this: LinearLayout layout = (LinearLayout)dialog.findViewById(R.id.graph1); But now I cannot do this, since I am outside the dialog.

How do I reach this layout?

Edit:

user113215 I did this:

in the activity:

 LayoutInflater inflater = LayoutInflater.from(ChartsDuration.this);
 customDialog = (ViewGroup) inflater.inflate(R.layout.dialog_charts1, null);


        btn1 = (Button)findViewById(R.id.btn1);
        btn1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                 dialog.setContentView(customDialog);
                 //queries

                 dialog.show();


            }
        });

and in drawChartAll:

   public void drawChartAll()
       {
    //code
     LinearLayout layout = (LinearLayout) customDialog.findViewById(R.id.graph1);
    }

Is this what you mean? This throws me a nullpointer exception to dialog.setContentView(customDialog); line.

Answer 1

Make the dialogvariable a field in your Activity class. You can reach it from anywhere. You can still use dialog.findviewbyid throughout you Activity. Just make sure setcontentView has been called before you call findviewbyid

Edit: I hope when you wrote since I am outside the dialog. you meant you could not access the variable