Question

I am adding say ‘n’ spinners in a loop. But only last added spinner is visible when I ran my code. Please see my code below

Context context = this;
        ArrayList<ArrayList<String>> list = new ArrayList<ArrayList<String>>();

        ArrayList<String> hi = new ArrayList<String>();
        hi.add("Test 1");
        hi.add("Test 2");

        list.add(hi);

        ArrayList<String> hi1 = new ArrayList<String>();
        hi1.add("Test 3");
        hi1.add("Test 4");

        list.add(hi1);

        AlertDialog.Builder alert = new AlertDialog.Builder(context);

        alert.setTitle("Test App");
        alert.setMessage("Testing");


        for (int i = 0; i < 2; i++) {
            final Spinner spinner = (Spinner) layout
                    .findViewById(R.id.spinner1);
            ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
                    android.R.layout.simple_spinner_item, list.get(i));

            dataAdapter
                    .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            spinner.setAdapter(dataAdapter);
                    alert.setView(spinner); 
        }

        alert.show();

Answer 1

That is happening because all you do in your for loop is searching for a Spinner in the Activity‘ layout and then using the setView method of the AlertDialog to add it(this method doesn’t add the views to the other Views already present, it just replaces them). If you want to add multiple Spinner to the same AlertDialog you should do it like this:

LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);
for (int i = 0; i < 2; i++) {
     Spinner spinner = new Spinner(this);
     ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
                   android.R.layout.simple_spinner_item, list.get(i));
     dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
     spinner.setAdapter(dataAdapter);
     LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
     ll.addView(spinner, params);
}
alert.setView(ll); 

Edit :
You can add more views by using a proper layout manager. For example, for a TextView and a Spinner on the same row you could use a TableLayout:

    TableLayout tl = new TableLayout(this);
    for (int i = 0; i < 2; i++) {
        TableRow tr = new TableRow(this);
        TextView t = new TextView(this);
        t.setText("Text " + i);
        TableRow.LayoutParams params1 = new TableRow.LayoutParams(
                TableRow.LayoutParams.WRAP_CONTENT,
                TableRow.LayoutParams.WRAP_CONTENT);
        tr.addView(t, params1);
        Spinner spinner = new Spinner(this);
        ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_spinner_item, list.get(i));
        dataAdapter
                .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(dataAdapter);
        TableRow.LayoutParams params2 = new TableRow.LayoutParams(
                TableRow.LayoutParams.FILL_PARENT,
                TableRow.LayoutParams.WRAP_CONTENT);
        tr.addView(spinner, params2);
        TableLayout.LayoutParams trParams = new TableLayout.LayoutParams(
                TableLayout.LayoutParams.FILL_PARENT,
                TableLayout.LayoutParams.WRAP_CONTENT);
        tl.addView(tr, trParams);
    }
    alert.setView(tl);