anks anks - 1 month ago 7
Android Question

Android creating AlertDialog using values from ArrayList?

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();

Answer Source

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
     alert.dismiss();
}
});
AlertDialog alert = builder.create();
alert.show();