Android creating AlertDialog using values from ArrayList?

android, android-adapter, android-dialog, android-listview

Solution

This is how you can achieve it:

final CharSequence[] items = {"1", "2", "3"};

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select");
builder.setItems(items, new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int item) {
        // Do something with the selection
        dialog.dismiss();
    }
});
builder.show();

Problem

I am using following code to create a Dialog aleart box with lists item from studentNames ArrayList.I am creating this ArrayList by reading childfile array.But when this code runs it just display a Dialog box with zero list item.I have even check my studentNames for null but it has values in it.According to documentation I need to set ListAdapter for showing list items in Dialog box , but that's also not working for me.Please help me finding the problem. ``` ArrayList<String> studentNames = new ArrayList<String>(); for (File file2 : childfile) { studentNames.add(file2.getName()); } AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setTitle(student.getName()).setAdapter(new ArrayAdapter(context, android.R.layout.simple_list_item_1, studentNames), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { switch (which) { cases } } }); builder.create(); builder.show(); ```

Original source