In last exercise, we have get the column LOOKUP_KEY without actually using it. The column LOOKUP_KEY that is a "permanent" link to the contact row. Because the Contacts Provider maintains contacts automatically, it may change a contact row's _ID value in response to an aggregation or sync. Even If this happens, the content URI CONTENT_LOOKUP_URI combined with contact's LOOKUP_KEY will still point to the contact row, so you can use LOOKUP_KEY to maintain links to "favorite" contacts, and so forth. This column has its own format that is unrelated to the format of the _ID column. ~ To understand it in more details, refer HERE.
package com.example.androidquerycontacts;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.support.v4.content.CursorLoader;
import android.support.v4.widget.CursorAdapter;
import android.support.v4.widget.SimpleCursorAdapter;
import android.app.Activity;
import android.database.Cursor;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends Activity {
ListView listContacts;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listContacts = (ListView)findViewById(R.id.conactlist);
Uri queryUri = ContactsContract.Contacts.CONTENT_URI;
String[] projection = new String[] {
ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.Contacts.HAS_PHONE_NUMBER,
ContactsContract.Contacts.LOOKUP_KEY};
String selection = ContactsContract.Contacts.DISPLAY_NAME + " IS NOT NULL";
CursorLoader cursorLoader = new CursorLoader(
this,
queryUri,
projection,
selection,
null,
null);
Cursor cursor = cursorLoader.loadInBackground();
String[] from = {ContactsContract.Contacts.DISPLAY_NAME};
int[] to = {android.R.id.text1};
ListAdapter adapter = new SimpleCursorAdapter(
this,
android.R.layout.simple_list_item_1,
cursor,
from,
to,
CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
listContacts.setAdapter(adapter);
listContacts.setOnItemClickListener(myOnItemClickListener);
}
OnItemClickListener myOnItemClickListener
= new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Cursor cursor = (Cursor)parent.getItemAtPosition(position);
int item_ID = cursor.getInt(cursor.getColumnIndex(ContactsContract.Contacts._ID));
String item_DisplayName = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
int item_HasPhoneNumber = cursor.getInt(cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER));
String item_LookUp = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
/*
String item_PhoneNumber = "";
if (item_HasPhoneNumber > 0){
item_PhoneNumber = "Has phone number.";
}else{
item_PhoneNumber = "No number.";
}
String item = String.valueOf(item_ID) + ": " + item_DisplayName
+ "\n" + item_PhoneNumber
+ "\nLOOKUP_KEY: " + item_LookUp;
Toast.makeText(getApplicationContext(), item, Toast.LENGTH_LONG).show();
*/
Uri lookUpUri = ContactsContract.Data.CONTENT_URI;
String[] projection = new String[] {
ContactsContract.CommonDataKinds.Phone.NUMBER,
ContactsContract.CommonDataKinds.Phone.TYPE,
ContactsContract.CommonDataKinds.Phone.LABEL};
String selection = ContactsContract.Data.LOOKUP_KEY + "=?";
String[] selectionArgs = new String[]{item_LookUp};
CursorLoader cursorLoader_LookUp = new CursorLoader(
MainActivity.this,
lookUpUri,
projection,
selection,
selectionArgs,
null);
Cursor cursor_LookUp = cursorLoader_LookUp.loadInBackground();
int lookUpCol_Type = cursor_LookUp.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE);
int lookUpCol_Number = cursor_LookUp.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
int lookUpCol_Label = cursor_LookUp.getColumnIndex(ContactsContract.CommonDataKinds.Phone.LABEL);
String stringNums = item_LookUp + "\n";
while(cursor_LookUp.moveToNext()){
int type = cursor_LookUp.getInt(lookUpCol_Type);
String stringType;
switch(type){
case ContactsContract.CommonDataKinds.Phone.TYPE_CUSTOM:
//the actual type in LABEL
stringType = "*" + cursor_LookUp.getString(lookUpCol_Label) + "*";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_HOME:
stringType = "HOME";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE:
stringType = "MOBILE";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_WORK:
stringType = "WORK";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_FAX_WORK:
stringType = "FAX_WORK";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_FAX_HOME:
stringType = "FAX_HOME";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_PAGER:
stringType = "PAGER";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_OTHER:
stringType = "OTHER";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_CALLBACK:
stringType = "CALLBACK";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_CAR:
stringType = "CAR";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_COMPANY_MAIN:
stringType = "COMPANY_MAIN";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_ISDN:
stringType = "ISDN";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_MAIN:
stringType = "MAIN";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_OTHER_FAX:
stringType = "OTHER_FAX";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_RADIO:
stringType = "RADIO";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_TELEX:
stringType = "TELEX";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_TTY_TDD:
stringType = "TTY_TDD";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_WORK_MOBILE:
stringType = "WORK_MOBILE";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_WORK_PAGER:
stringType = "WORK_PAGER";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_ASSISTANT:
stringType = "ASSISTANT";
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_MMS:
stringType = "MMS";
break;
default:
stringType = "unknown";
break;
}
String stringNumber = cursor_LookUp.getString(lookUpCol_Number);
stringNums += String.valueOf(type) + " " + stringType + " : " + stringNumber + "\n";
}
Toast.makeText(getApplicationContext(),
stringNums,
Toast.LENGTH_LONG).show();
}
};
}
Download the files.Next:
- Get Email from Contacts database
