Android开发：ListView中Checkbox的处理

　　基本功能：读取手机通讯录，形成列表，显示人名、电话，将勾选的信息保存到常用联系人数据库，再次打开时，根据常用联系人数据库中的信息，设置ListView中项目的勾选状态。
　　效果如下图所示：
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[img]http://dl2.iteye.com/upload/attachment/0112/7535/16ffa7da-587e-3763-bedf-388458b5c709.jpg[/img]
[/align]

　　主要涉及三个文件，详细内容如下：

[b]ListView的子项目，文件名：person_row.xml：[/b]

    android:descendantFocusability="blocksDescendants"
    android:layout_width="match_parent" android:layout_height="match_parent">

            android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:focusable="false"
        android:clickable="false"
        android:id="@+id/contact_checbox" />

            android:layout_width="2dp"
        android:layout_height="wrap_content"
        android:id="@+id/contact_id"
        android:visibility="invisible" />

            android:layout_width="60dp"
        android:layout_height="wrap_content"
        android:text=""
        android:id="@+id/contact_name"
        android:textAlignment="textStart"
        android:background="#ffe222"
        style="@style/style_edit" />

            android:layout_width="90dp"
        android:layout_height="wrap_content"
        android:text=""
        android:id="@+id/contact_mobile"
        android:textAlignment="textStart"
        android:background="#34ff1d"
        style="@style/style_edit" />

            android:layout_width="60dp"
        android:layout_height="wrap_content"
        android:text=""
        android:id="@+id/contact_title"
        android:background="#cafeff" />

            android:layout_width="60dp"
        android:layout_height="wrap_content"
        android:text=""
        android:id="@+id/contact_remark1"
        android:background="#b5aaff"
        style="@style/style_edit" />

            android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:id="@+id/contact_remark2" />

[b]布局文件，文件名contact_activity：[/b]

    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.wallimn.iteye.msgutil.ContactActivity">

            android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/contact_list"
        android:layout_alignParentStart="true" />

[b]JAVA文件，文件名ContactActivity ：[/b]

package com.wallimn.iteye.msgutil;

import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.provider.ContactsContract;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CheckedTextView;
import android.widget.CompoundButton;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class ContactActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {

    /**
     * 简短的联系人信息类
     */
    public static class ContactDetail{
        public String id;
        public String name;
        public String mobile;
        public String title;
        public String remark1;
        public boolean checked;

        public ContactDetail(String id,String name,String mobile){
            this.id = id;
            this.name = name;
            this.mobile = mobile;
            this.title = "";
            this.remark1="";
        }
        public ContactDetail(String id,String name,String mobile,String title,String remark1){
            this.id = id;
            this.name = name;
            this.mobile = mobile;
            this.title = title;
            this.remark1 = remark1;
        }
    }

    /**
     * 所有联系人列表，读取手机通讯录的结果
     */
    List allContacts;

    /**
     * 界面元素
     */
    ListView listView;

    /**
     * 读取联系人的线程
     */
    Thread readContactsThread;
    Handler messageHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {

                case UPDATE_LIST:
                    if (proDialog != null) {
                        proDialog.dismiss();
                        proDialog = null;
                    }
                    freshListView();
            }
        }
    };


    private final int UPDATE_LIST=0x3390;
    private ProgressDialog proDialog;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_contact);

        listView = (ListView)this.findViewById(R.id.contact_list);
        listView.setItemsCanFocus(false);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        listView.setOnItemClickListener(this);

        allContacts = new LinkedList();


        readContactsThread=new Thread(new ReadContactsRunnable());
        readContactsThread.start();
        proDialog = ProgressDialog.show(ContactActivity.this, "请稍候","正在读取联系人......", true, true);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_contact, menu);
        return true;
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        //点击菜单上的确定后，将数据保存到本机的数据库中。
        if (id == R.id.menu_ok) {
            Map sels = new HashMap();
            SQLiteDatabase db = DbUtil.getConnection(this);
            Map ids = DbUtil.getLocalContactId(db);
            String insertsql = "insert into t_person (name,mobile,contactid) values(?,?,?)";
            String deletesql = "delete from t_person where contactid=?";

            int selCount = 0;
            for(ContactDetail cd:this.allContacts) {
                //如果选中、且本地数据库中没有，插入本地数据库
                if (cd.checked == true) {
                    if (!ids.containsKey(cd.id)) {
                        db.execSQL(insertsql, new String[]{cd.name, cd.mobile, cd.id});
                        Log.i("wallimn", "插入：" + cd.name);
                        selCount++;
                    }
                    sels.put(cd.id, "1");
                }
            }
            Log.i("wallimn", "共计：" + allContacts.size() + "，选中：" + selCount);

            //删除这次未选的。
            for(String key:ids.keySet()){
                if(!sels.containsKey(key)){
                    db.execSQL(deletesql,new Object[]{key});
                }
            }
            db.close();;
            db=null;

            this.finish();
            return true;
        }
        else if(id == R.id.menu_cancel) {
            this.finish();
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    /**
     * 刷新ListView显示
     */
    private void freshListView(){
        Log.i("wallimn","联系人装载完毕，准备生成列表，读取联系人数量："+allContacts.size());
        if(allContacts!=null){
            ContactAdapter adapter = new ContactAdapter(ContactActivity.this,this.allContacts);

            //读取数据库中保存的常用联系人，如果存在，设置该行为选中状态。
            Map ids = DbUtil.getLocalContactId(ContactActivity.this);
            for(ContactDetail cd :allContacts){
                if(ids.containsKey(cd.id))cd.checked=true;
            }
            listView.setAdapter(adapter);
        }
        Log.i("wallimn","列表生成完毕");

    }

    /**
     * 设置了ListView中的checkbox不能获取焦点、不能点击，ListView才会响应这个事件
     * @param parent
     * @param view
     * @param position
     * @param id
     */
    @Override
    public void onItemClick(AdapterView parent, View view, int position, long id) {
        Log.i("wallimn","ItemClick被点击，position="+position+" , id="+id);
        CheckBox cb = (CheckBox)view.findViewById(R.id.contact_checbox);
        cb.setChecked(!cb.isChecked());
        allContacts.get((int) id).checked = cb.isChecked();
    }

    /**
     * 读取联系人的线程，读取完成后，数据保存到List中，最后发送消息，通知界面更新显示
     */
    class ReadContactsRunnable implements Runnable{
        @Override
        public void run() {
            Uri uri = ContactsContract.Contacts.CONTENT_URI;
            String[] projection = new String[] {
                    ContactsContract.Contacts._ID,
                    ContactsContract.Contacts.DISPLAY_NAME,
                    ContactsContract.Contacts.PHOTO_ID
            };
            String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '1'";
            String[] selectionArgs = null;
            String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";
            ContentResolver contentResolver = ContactActivity.this.getContentResolver();
            Cursor cursor=contentResolver.query(uri, projection, selection, selectionArgs, sortOrder);
            //Cursor cursor=managedQuery(uri, projection, selection, selectionArgs, sortOrder);
            Cursor phonecur = null;

            int count = 0;
            while (cursor.moveToNext()){

                // 取得联系人名字
                int nameFieldColumnIndex = cursor.getColumnIndex(android.provider.ContactsContract.PhoneLookup.DISPLAY_NAME);
                String name = cursor.getString(nameFieldColumnIndex);
                // 取得联系人ID
                String contactId = cursor.getString(cursor.getColumnIndex(android.provider.ContactsContract.Contacts._ID));
                //phonecur = managedQuery(android.provider.ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, android.provider.ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = "  + contactId, null, null);
                phonecur = contentResolver.query(android.provider.ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, android.provider.ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = " + contactId, null, null);
                // 取得电话号码(可能存在多个号码)
                while (phonecur.moveToNext()){
                    String strPhoneNumber = phonecur.getString(phonecur.getColumnIndex(android.provider.ContactsContract.CommonDataKinds.Phone.NUMBER));
                    strPhoneNumber = strPhoneNumber.replace("-", "").replace("+86","").replace(" ","");
                    if(strPhoneNumber.length()==11) {
                        //allContacts.add(new ContactDetail(contactId, "wallimn", "13801380000"));
                        allContacts.add(new ContactDetail(contactId, name, strPhoneNumber));
                    }

                }
                count++;
                phonecur.close();
                phonecur = null;
                //if(count>20)break;
            }

            cursor.close();
            Message loaded=new Message();
            loaded.what=UPDATE_LIST;
            messageHandler.sendMessage(loaded);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        allContacts.clear();
    }

    /**
     * 联系人信息适配器
     */
    public static class ContactAdapter extends BaseAdapter{

        private List list;
        private Context context;

        public  List getList(){
            return this.list;
        }
        /**
         * 构造函数，传入list参数，避免代码耦合
         * @param list
         */
        public ContactAdapter(Context context,List list){
            this.list = list;
            this.context = context;
        }
        @Override
        public int getCount() {
            return list.size();
        }

        @Override
        public Object getItem(int position) {
            return list.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ContactDetail cd = list.get(position);
            final int index = position;
            if(convertView == null){
                convertView = LayoutInflater.from(context).inflate(R.layout.person_row, null);
            }else{
                ;
            }
            ((TextView)convertView.findViewById(R.id.contact_id)).setText(cd.id);
            ((TextView)convertView.findViewById(R.id.contact_name)).setText(cd.name);
            ((TextView)convertView.findViewById(R.id.contact_mobile)).setText(cd.mobile);
            ((TextView)convertView.findViewById(R.id.contact_title)).setText(cd.title);
            ((TextView)convertView.findViewById(R.id.contact_remark1)).setText(cd.remark1);
            ((CheckBox) convertView.findViewById(R.id.contact_checbox)).setChecked(cd.checked);
            return convertView;
        }

    }
}