Android通讯录操作：增删改查源代码解析

摘要: Activty部分： TestContacts.java：package waga.android.study.TestContacts; import android.app.Activity; import android.content.ContentResolver; import android.content.Intent; import android.data ...
Activty部分：

TestContacts.java：

   1. package waga.android.study.TestContacts;
   2. import android.app.Activity;
   3. import android.content.ContentResolver;
   4. import android.content.Intent;
   5. import android.database.Cursor;
   6. import android.os.Bundle;
   7. import android.provider.ContactsContract;
   8. import android.provider.ContactsContract.RawContacts;
   9. import android.view.Menu;
  10. import android.view.MenuInflater;
  11. import android.view.MenuItem;
  12. import android.widget.TextView;
  13. public class TestContacts extends Activity
  14. {
  15. TextView myTextView;
  16. String str;
  17.     @Override
  18.     public void onCreate(Bundle savedInstanceState)
  19.     {
  20.         super.onCreate(savedInstanceState);
  21.         setContentView(R.layout.main);
  22.         setTitle(R.string.ReadContact);
  23.     }
  24.    
  25.     // 创建选项菜单

  26.     @Override
  27.     public boolean onCreateOptionsMenu(Menu menu)
  28.     {
  29.      super.onCreateOptionsMenu(menu);
  30.   MenuInflater inflater = getMenuInflater();
  31.   inflater.inflate(R.layout.menu, menu);
  32.   
  33.   return true;
  34. }
  35.     // 响应选项菜单
  36. @Override
  37. public boolean onOptionsItemSelected(MenuItem item)
  38. {
  39.   switch (item.getItemId())
  40.   {
  41.    // 新建联系人
  42.          case R.id.menu_add:
  43.          {
  44.           // new一 个Intent对 象 ， 并指定class
  45.           Intent intent = new Intent();
  46.           intent.setClass(this, NewContactActivity.class);
  47.           startActivity(intent);
  48.           return true;
  49.    }
  50.          
  51.          // 删除联系人
  52.          case R.id.menu_delete:
  53.          {
  54.           // new一 个Intent对 象 ， 并指定class
  55.           Intent intent = new Intent();