Exercise : 12

Understanding content providers and permissions:

a. Read phonebook contacts using content providers and display in list.
Screen Shot:

XML :
main.xml :

JAVA :
TwelveActivity.java

package kmn.Twelve;
import java.util.ArrayList;
import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.PhoneLookup;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListView;


public class TwelveActivity extends Activity 
{
    /** @author Y@@D */
 private ArrayList list;
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        int j=0;
        Cursor c=getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null,null,null);
        list= new ArrayList();
        while(c.moveToNext())
        {
         int nameindex=c.getColumnIndex(PhoneLookup.DISPLAY_NAME);
         String name=c.getString(nameindex);
         list.add(name);
         Log.d("Contacts:",name);   
        }
        ListView l=(ListView)findViewById(R.id.listView1);
        ArrayAdapter aa=new ArrayAdapter(this,android.R.layout.simple_list_item_1,list);
        l.setAdapter(aa);
    }
}