Android通讯录开发之删除功能的实现方法

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <group android:id="@+id/metting_menu" >
        <item
            android:id="@+id/select_all_item"
            android:icon="@drawable/select_all_not"
            android:title="全选">
        </item>
        <item
            android:id="@+id/delete_item"
            android:icon="@drawable/delete"
            android:title="删除">
        </item>
        <item
            android:id="@+id/sync_item"
            android:icon="@drawable/sync_manage"
            android:title="同步">
        </item>
    </group>

</menu>

/**
  * 创建菜单
  */
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  MenuInflater inflater = getMenuInflater();
  inflater.inflate(R.menu.meetting_contact_menu, menu);
  selectAllItem = menu.findItem(R.id.select_all_item);
  return true;
 }

 // 当用户打开菜单的时候触发
 @Override
 public boolean onMenuOpened(int featureId, Menu menu) {
  if (menu != null) {
   refreshSelectAllItemIcon();
  }
  return super.onMenuOpened(featureId, menu);
 }

 /**
  * menu的点击事件
  */
 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
  case R.id.select_all_item:
   if (isAllChecked) { // 反选
    item.setIcon(R.drawable.select_all_not);
    invertSelection();
   } else { // 全选
    if (contactList.size() == 0) {
     Toast.makeText(this, "目前没有可选的联系人", Toast.LENGTH_SHORT)
       .show();
     break;
    }
    item.setIcon(R.drawable.select_all);
    selectAllContacts();
   }
   break;
  case R.id.delete_item: // 删除
   if (count == 0) {
    Toast.makeText(this, "您还没有选择任何联系人", Toast.LENGTH_SHORT).show();
    break;
   }
   showDeleteDialog(this, "您确定要删除吗");
   isAllChecked = false;
   selectAllItem.setIcon(R.drawable.select_all_not);
   break;
  case R.id.sync_item:
   Intent fresh_intent = new Intent(this, CloudSyncActivity.class);
   if (flag) {// 如果是会议
    fresh_intent.putExtra("number", meetingNumber);
   }
   startActivityForResult(fresh_intent, CLOUD_SYNC);
   break;
  default:
   break;
  }
  return false;
 }

 // 刷新菜单项全选
 private void refreshSelectAllItemIcon() {
  for (String contactId : map_NumberSelected.keySet()) {
   if (!map_NumberSelected.get(contactId)) {
    isAllChecked = false;
    selectAllItem.setIcon(R.drawable.select_all_not);
    break;
   }
   isAllChecked = true;
   selectAllItem.setIcon(R.drawable.select_all);
  }
 }

/** 显示确认删除对话框 **/
 public void showDeleteDialog(Context context, String msg) {
  final Dialog dialog = new Dialog(context, R.style.MyDialog);
  View view = LayoutInflater.from(context).inflate(R.layout.back_dialog,
    null);
  TextView msg_tv = (TextView) view.findViewById(R.id.msg);
  msg_tv.setText(msg);
  Button sure = (Button) view.findViewById(R.id.sure);
  Button cancle = (Button) view.findViewById(R.id.cancle);
  dialog.setContentView(view);
  sure.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    deleteContacts();
    dialog.dismiss();
   }
  });
  cancle.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {
    dialog.dismiss();
   }
  });
  dialog.show();
 }

 // 删除选中的联系人
 public void deleteContacts() {
  DialogHelp.getInstance().showHttpDialog(this, R.string.wait_for_while,
    getString(R.string.deleting_contact));
  new Thread() {
   @Override
   public void run() {
    ArrayList<Contact> deleteContacts = new ArrayList<Contact>();
    for (Contact contact : contactList) {
     boolean isselected = map_NumberSelected
       .get(contact.getId());
     if (isselected) {
      for (RawContact rawContact : rawList) {
       if (contact.getUserId() == rawContact.getUserId()) { // 是同一个id
        if (contact.getNumber() == rawContact
          .getPhone1()) {
         rawContact.setPhone1(null);
        } else if (contact.getNumber() == rawContact
          .getPhone2()) {
         rawContact.setPhone2(null);
        } else if (contact.getNumber() == rawContact
          .getTelephone()) {
         rawContact.setTelephone(null);
        }
        if ((rawContact.getPhone1() == null || ""
          .equals(rawContact.getPhone1()))
          && (rawContact.getPhone2() == null || ""
            .equals(rawContact.getPhone2()))
          && (rawContact.getTelephone() == null || ""
            .equals(rawContact
              .getTelephone()))) {
         MyDataBase.deleteContact(
           MeetingContactActivity.this,
           rawContact);
        } else {
         MyDataBase.updateContactById(
           MeetingContactActivity.this,
           rawContact);
        }
        break;
       }
      }
      // 将需要删除的联系人保存下来
      deleteContacts.add(contact);
     }
    }
    Message msg = new Message();
    msg.obj = deleteContacts;
    msg.what = DELETE_COMPLETE;
    handler.sendMessage(msg);
   };
  }.start();

 }

private Handler handler = new Handler() {
  @Override
  public void handleMessage(Message msg) {
   if (msg.obj != null) {
    ArrayList<Contact> deleteContacts = (ArrayList<Contact>) msg.obj;
    for (Contact contact : deleteContacts) {
     map_NumberSelected.remove(contact.getId());
     contactList.remove(contact);
    }
   }
   switch (msg.what) {
   case LOAD_CONTACT_FINISHED:
    // 判断是否为空
    if (contactList == null || contactList.size() == 0) {
     syncLayout.setVisibility(View.VISIBLE);
     bottomLayout.setVisibility(View.GONE);
     listView.setVisibility(View.GONE);
    } else {
     syncLayout.setVisibility(View.GONE);
     bottomLayout.setVisibility(View.VISIBLE);
     listView.setVisibility(View.VISIBLE);
    }
    adapter.setContactList(contactList);
    refreshList();
    DialogHelp.getInstance().dismissDialog();
    break;
   case CLOUD_SYNC: // 同步
    initContacts();
    refreshList();
    break;
   case SEARCH_FINISH:
    refreshList();
    break;
   case DELETE_COMPLETE: // 删除完毕
    DialogHelp.getInstance().dismissDialog();
    // 重新初始化
    refreshList();
    break;
   }
  }
 };