Just use some simple dropdown Spinner with listview and pass a string array which contains all country names and country calling (ISD). Something like this:
<string-array name="CountryCodes" >
<item>93,AF</item>
<item>355,AL</item>
<item>297,AW</item>
<item>61,AU</item>
<item>43,AT</item>
<item>994,AZ</item>
<item>973,BH</item>
<item>880,BD</item>
<item>375,BY</item>
<item>32,BE</item>
<item>501,BZ</item>
<item>229,BJ</item>
<item>975,BT</item>
<item>591,BO</item>
<item>387,BA</item>
<item>267,BW</item>
<item>55,BR</item>
<item>673,BN</item>
<item>359,BG</item>
<item>226,BF</item>
<item>95,MM</item>
<item>257,BI</item>
<item>855,KH</item>
<item>237,CM</item>
<item>1,CA</item>
<item>238,CV</item>
<item>236,CF</item>
<item>235,TD</item>
<item>56,CL</item>
<item>86,CN</item>
<item>61,CX</item>
<item>61,CC</item>
<item>57,CO</item>
<item>269,KM</item>
<item>242,CG</item>
<item>243,CD</item>
<item>682,CK</item>
<item>506,CR</item>
<item>385,HR</item>
<item>53,CU</item>
<item>357,CY</item>
<item>420,CZ</item>
<item>45,DK</item>
<item>263,ZW</item>
</string-array>
Here is the complete list.
And Here are some tutorial (this or this) for spinners with listview.
and when user will select one from the list then do something like this:
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
// Get select item
int sid=spinnerDropDown.getSelectedItemPosition();
your_txtview.setText(""+ countries[sid]);
}
Here you go! Cheers!!