Android开发：ListView中Checkbox的处理

た入场券 2022-04-12 11:14 228阅读 0赞

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：  
\[align=center\]  
\[img\]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：\[/b\]

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:descendantFocusability="blocksDescendants"
        android:layout_width="match_parent" android:layout_height="match_parent">
    
        <CheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:focusable="false"
            android:clickable="false"
            android:id="@+id/contact_checbox" />
    
        <TextView
            android:layout_width="2dp"
            android:layout_height="wrap_content"
            android:id="@+id/contact_id"
            android:visibility="invisible" />
    
        <TextView
            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" />
    
        <TextView
            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" />
    
        <TextView
            android:layout_width="60dp"
            android:layout_height="wrap_content"
            android:text=""
            android:id="@+id/contact_title"
            android:background="#cafeff" />
    
        <TextView
            android:layout_width="60dp"
            android:layout_height="wrap_content"
            android:text=""
            android:id="@+id/contact_remark1"
            android:background="#b5aaff"
            style="@style/style_edit" />
    
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text=""
            android:id="@+id/contact_remark2" />
    </LinearLayout>

\[b\]布局文件，文件名contact\_activity：\[/b\]

\[b\]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<ContactDetail> 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<ContactDetail>();
    
    
            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<String ,String> sels = new HashMap<String ,String>();
                SQLiteDatabase db = DbUtil.getConnection(this);
                Map<String,String> 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<String,String> 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<ContactDetail> list;
            private Context context;
    
            public  List<ContactDetail> 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<ContactDetail> 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;
            }
    
        }
    }