android - How to add an icon before each item in alert dialog?

Question

I am using an AlertDialog (see the below code) and would like to put an image before each text.

For example, email icon then text "Email", Facebook icon then text "Facebook", etc.

Using the following code, how to add an icon before each text value?

final CharSequence[] items = { "Email", "Facebook", "Twitter", "LinkedIn" };
AlertDialog.Builder builder = new AlertDialog.Builder(More.this);
builder.setTitle("Share Appliction");
builder.setItems(items, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int item) {
        if (item == 0) {

        } else if (item == 1) {

        } else if (item == 2) {

        } else if(item == 3) {

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

Answer 1

You need custom ListAdapter to add your image. One way is to subclass the ArrayAdapter (used by default by the AlertDialog). Here is an example:

final Item[] items = {
    new Item("Email", android.R.drawable.ic_menu_add),
    new Item("Facebook", android.R.drawable.ic_menu_delete),
    new Item("...", 0),//no icon for this one
};

ListAdapter adapter = new ArrayAdapter<Item>(
    this,
    android.R.layout.select_dialog_item,
    android.R.id.text1,
    items){
        public View getView(int position, View convertView, ViewGroup parent) {
            //Use super class to create the View
            View v = super.getView(position, convertView, parent);
            TextView tv = (TextView)v.findViewById(android.R.id.text1);

            //Put the image on the TextView
            tv.setCompoundDrawablesWithIntrinsicBounds(items[position].icon, 0, 0, 0);

            //Add margin between image and text (support various screen densities)
            int dp5 = (int) (5 * getResources().getDisplayMetrics().density + 0.5f);
            tv.setCompoundDrawablePadding(dp5);

            return v;
        }
    };


new AlertDialog.Builder(this)
    .setTitle("Share Appliction")
    .setAdapter(adapter, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int item) {
            //...
        }
    }).show();

Here is the Item class

public static class Item{
    public final String text;
    public final int icon;
    public Item(String text, Integer icon) {
        this.text = text;
        this.icon = icon;
    }
    @Override
    public String toString() {
        return text;
    }
}