Android Open Source - 2014-Droid-code Main Activity

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License

The source code is released under:

GNU General Public License

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Java Source Code

package cs518.sample.usecontactcontentprovider;
/*/*  w ww .  ja  v a 2s  . co  m*/
 * Uses the Contacts Content Provider
 * needs the following in the manifest
 *     <uses-permission android:name="android.permission.READ_CONTACTS"/>
 *  following 
 *  http://developer.android.com/guide/topics/providers/content-providers.html
 *  http://developer.android.com/guide/topics/providers/contacts-provider.html
 *  http://www.vogella.com/tutorials/AndroidSQLite/article.html#tutorialusecp_example
 *  
 *  This is a simple implementation I leave it to you to implement 
 *  a CursorAdapter and an AdapterView and and other functionality.
 */
import android.app.Activity;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.widget.TextView;

public class MainActivity extends Activity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    TextView contactView = (TextView) findViewById(R.id.tv);
    Cursor cursor = getContacts();
    
    contactView.append("Number of Contacts: " + cursor.getCount() + " (Showing first 50)\n");
    
    int count=50;  // limit to first 50 contacts
    while (cursor.moveToNext() && (count-- > 0) ) {
      String displayName = cursor.getString(cursor
          .getColumnIndex(ContactsContract.Data.DISPLAY_NAME));
      contactView.append("Name: ");
      contactView.append(displayName);
      // get phone numbers for this contact
      String contactId =
          cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
      String phoneNum = getPhoneNum(contactId);


      contactView.append(" Phone1: ");
      contactView.append(phoneNum);
      contactView.append("\n");
    }
    cursor.close();
  }

  private Cursor getContacts() {
    // Run query
    Uri uri = ContactsContract.Contacts.CONTENT_URI;
    String[] projection = new String[] { 
        ContactsContract.Contacts._ID,
        ContactsContract.Contacts.DISPLAY_NAME };

    String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '"
        + ("1") + "'";
    String[] selectionArgs = null;

    String sortOrder = ContactsContract.Contacts.DISPLAY_NAME
        + " COLLATE LOCALIZED ASC";
    /**
     * Not using SQLiteDatabawe.query(table, ...)
     * using ContentResolver.query(uri, ...)
     */
    return getContentResolver().query(uri, projection, selection, selectionArgs,
        sortOrder);
  }
  private String getPhoneNum(String contactId) {    
    String number;
    Uri uri = Phone.CONTENT_URI;
    String[] projection = null;
    String selection = Phone.CONTACT_ID  + " = '"
        + contactId + "'";
    String[] selectionArgs = null;
    String sortOrder = null;

    Cursor phones = getContentResolver().query(uri, projection, selection, selectionArgs,
        sortOrder);

    // returns false if cursor empty 
    if (phones.moveToFirst()) {
      number = phones.getString(phones.getColumnIndex(Phone.NUMBER));
      int type = phones.getInt(phones.getColumnIndex(Phone.TYPE));
      switch (type) {
      case Phone.TYPE_HOME:
        number += " home";
        break;
      case Phone.TYPE_MOBILE:
        number += " mobile";
        break;
      case Phone.TYPE_WORK:
        number += " work";
        break;
      }
    } else {
      number = "none";
    }
    phones.close();
    return number;
  }

}

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