Android Open Source - introToDroid4ed Simple Contacts Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.introtoandroid.simplecontacts;
/*  ww w . j ava  2s.  c o m*/

import android.app.Activity;
import android.support.v4.content.CursorLoader;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.util.Log;
import android.view.View;

public class SimpleContactsActivity extends Activity {
    
  public static final String DEBUG_TAG = "SimpleContactsActivity";
  
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);        
    }
  
    public void listContact(View v) {
      String[] requestedColumns = {
          ContactsContract.Contacts.DISPLAY_NAME,
          ContactsContract.CommonDataKinds.Phone.NUMBER,
      };
      CursorLoader loader = new CursorLoader(this, 
        ContactsContract.Data.CONTENT_URI, 
        requestedColumns, null,  null, "display_name desc limit 1");
    Cursor contacts = loader.loadInBackground();

    int recordCount = contacts.getCount();
    Log.d(DEBUG_TAG, "Record Count: " + recordCount);
    
    if(recordCount > 0) {
      int nameIdx = contacts
            .getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME);
        int phoneIdx = contacts
            .getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
        
        contacts.moveToFirst();
        Log.d(DEBUG_TAG, "Name: " + contacts.getString(nameIdx));
        Log.d(DEBUG_TAG, "Phone: " + contacts.getString(phoneIdx));
    }
    }
}

Java Source Code List

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