使用ContentProvider管理联系人------搜索联系人

此博客只实现了查询功能:

import java.util.ArrayList;

import android.os.Bundle;
import android.provider.ContactsContract;
import android.app.Activity;
import android.app.AlertDialog;
import android.database.Cursor;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.Button;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.TextView;

search.setOnClickListener(new OnClickListener() {

  @Override
  public void onClick(View v) {
    // 定义两个List来封装系统的联系人信息、指定联系人的电话号码、Email等详情
    final ArrayList<String> names = new ArrayList<String>();
    final ArrayList<ArrayList<String>> details = new ArrayList<ArrayList<String>>();
    //使用ContentResolver查找联系人的数据
    Cursor cursor = getContentResolver().query(
    ContactsContract.Contacts.CONTENT_URI, null, null, null,null );
    //遍历查询结果,获取系统中所有联系人
    while(cursor.moveToNext()){
      //获取联系人ID
      String contactId = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
      //获取联系人的名字
      String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
      names.add(name);
      //使用ContentResolver查询联系人的电话号码
      Cursor phones = getContentResolver().query(
          ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,
          ContactsContract.CommonDataKinds.Phone.CONTACT_ID
          +"="+contactId, null, null);
      ArrayList<String> detail = new ArrayList<String>();
      //遍历查询结果,获取该联系人的多个电话号码
      while(cursor.moveToNext()){
        //获取查询结果中电话号码列中的数据
        String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
        detail.add("电话号码:"+phoneNumber);
      }
      phones.close();
      //使用ContentResolver查询联系人的E_mail地址
      Cursor emails = getContentResolver().query(
          ContactsContract.CommonDataKinds.Email.CONTENT_URI, null,
          ContactsContract.CommonDataKinds.Email.CONTACT_ID
          +"="+contactId, null, null);
      //遍历查询结果,获取该联系人的多个E_mail地址
      while(emails.moveToNext()){
      //获取查询结果中E_mail地址列中的数据
      String emailAddress = emails.getString(
          emails.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA
          ));
      detail.add("邮件地址:"+emailAddress);
      }
      emails.close();
      details.add(detail);
    }
    cursor.close();
    //加载result.xml界面布局代表的视图
    View resultDialog = getLayoutInflater().inflate(R.layout.result, null);
    //获取resultDialog中ID为list的ExpandableListView
    ExpandableListView list = (ExpandableListView) resultDialog.findViewById(R.id.list);
    //创建一个ExpandableListAdapter对象
    ExpandableListAdapter adapter = new BaseExpandableListAdapter() {

      @Override
      public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
      }

      @Override
      public boolean hasStableIds() {
      return true;
      }

      //该方法决定每个组选项的外观
      @Override
      public View getGroupView(int groupPosition, boolean isExpanded,
      View convertView, ViewGroup parent) {
        TextView textView = getTextView();
        textView.setText(getGroup(groupPosition).toString());
        return textView;
      }

      @Override
      public long getGroupId(int groupPosition) {
        return groupPosition;
      }

      @Override
      public int getGroupCount() {
        return names.size();
      }

      //获取指定组位置处的组数据
      @Override
      public Object getGroup(int groupPosition) {
        return names.get(groupPosition);
      }

      @Override
      public int getChildrenCount(int groupPosition) {
        return details.get(groupPosition).size();
      }
      private TextView getTextView(){
        AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
              ViewGroup.LayoutParams.MATCH_PARENT, 64);
        TextView textView = new TextView(MainActivity.this);
        textView.setLayoutParams(lp);
        textView.setGravity(Gravity.CENTER_VERTICAL|Gravity.LEFT);
        textView.setPadding(36, 0, 0, 0);
        textView.setTextSize(20);
        return textView;
      }

      //该方法决定每个子选项的外观
      @Override
      public View getChildView(int groupPosition, int childPosition,
          boolean isLastChild, View convertView, ViewGroup parent) {
        TextView textView = getTextView();
        textView.setText(getChild(groupPosition, childPosition).toString());
        return textView;
      }

      @Override
      public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
      }

      //获取指定组位置、指定子列表项处的子列表项数据
      @Override
      public Object getChild(int groupPosition, int childPosition) {
        return details.get(groupPosition).get(childPosition);
      }
    };
    //为ExpandableListView设置Adapter
    list.setAdapter(adapter);
    //使用对话框来显示查询结果
    new AlertDialog.Builder(MainActivity.this)
        .setView(resultDialog).setPositiveButton("确定", null).show();
    }
});

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