android面試之contentProvider擷取連絡人

標籤：

1.使用contentprovider尋找連絡人

MainActivity.java

public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);getContacts();}private void getContacts() {// 得到ContentResolver對象   ContentResolver cr = this.getContentResolver();     // 取得電話本中開始一項的游標,主要就是查詢"contacts"表Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);   while (cursor.moveToNext())   {   StringBuilder sbLog = new StringBuilder();    // 取得連絡人名字 (顯示出來的名字)，實際內容在 ContactsContract.Contacts中   int nameIndex = cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME);      String name = cursor.getString(nameIndex);   sbLog.append("name=" + name + ";");        // 取得連絡人ID    String contactId = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));           // 根據連絡人ID查詢對應的電話號碼    Cursor phoneNumbers = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = "              + contactId, null, null);         // 取得電話號碼(可能存在多個號碼)       while (phoneNumbers.moveToNext())       {        String strPhoneNumber = phoneNumbers.getString(phoneNumbers.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));           sbLog.append("Phone=" + strPhoneNumber + ";");    }       phoneNumbers.close();         // 根據連絡人ID查詢對應的email    Cursor emails = cr.query(ContactsContract.CommonDataKinds.Email.CONTENT_URI, null, ContactsContract.CommonDataKinds.Email.CONTACT_ID + " = "              + contactId, null, null);         // 取得email(可能存在多個email)       while (emails.moveToNext())       {        String strEmail = emails.getString(emails.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));           sbLog.append("Email=" + strEmail + ";");    }       emails.close();         Log.i("TAG", sbLog.toString());}cursor.close();    }}

 

android面試之contentProvider擷取連絡人