带复选框的联系人列表
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【中文标题】带复选框的联系人列表【英文标题】：contact list with checkbox 【发布时间】：2012-06-25 13:50:49 【问题描述】：我正在尝试创建一个联系人列表，每个联系人旁边都有一个复选框。 我找到了一个对我有很大帮助的代码，但我仍然无法让它工作。 这里是：
import java.util.ArrayList;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.Toast;
public class ContactReadActivity extends ListActivity
private ArrayList<Contact> contacts = null;
private ProgressDialog progressDialog = null;
private ContactAdapter contactAdapter = null;
private Runnable viewContacts = null;
private SparseBooleanArray selectedContacts = new SparseBooleanArray() ;
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
contacts = new ArrayList<Contact>();
this.contactAdapter = new ContactAdapter(this, R.layout.read_contacts, contacts);
setListAdapter(this.contactAdapter);
viewContacts = new Runnable()
@Override
public void run()
getContacts();
;
Thread thread = new Thread(null, viewContacts, "ContactReadBackground");
thread.start();
progressDialog = ProgressDialog.show(ContactReadActivity.this,"Please wait...", "Retrieving contacts ...", true);
private void getContacts()
try
String[] projection = new String[]
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.Contacts.HAS_PHONE_NUMBER,
ContactsContract.Contacts._ID
;
Cursor cursor = managedQuery(ContactsContract.Contacts.CONTENT_URI, projection, ContactsContract.Contacts.HAS_PHONE_NUMBER+"=?", new String[]"1", ContactsContract.Contacts.DISPLAY_NAME);
contacts = new ArrayList<Contact>();
while(cursor.moveToNext())
Contact contact = new Contact();
String contactId = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
contact.setContactName(cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)));
contacts.add(contact);
cursor.close();
runOnUiThread(returnRes);
catch(Exception e)
e.printStackTrace();
private Runnable returnRes = new Runnable()
@Override
public void run()
// close the progress dialog
if (progressDialog.isShowing())
progressDialog.dismiss();
contactAdapter.notifyDataSetChanged();
;
public class ContactAdapter extends ArrayAdapter<Contact>
private ArrayList<Contact> items;
public ContactAdapter(Context context, int textViewResourceId, ArrayList<Contact> items)
super(context, textViewResourceId, items);
this.items = items;
@Override
public View getView(int position, View convertView, ViewGroup parent)
View view = convertView;
if (view == null)
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = vi.inflate(R.layout.read_contacts, null);
Contact contact = items.get(position);
if (contact != null)
CheckBox nameCheckBox = (CheckBox) view.findViewById(R.id.checkBox);
nameCheckBox.setChecked(selectedContacts.get(position));
if (nameCheckBox != null)
nameCheckBox.setText(contact.getContactName());
nameCheckBox.setOnClickListener(new OnItemClickListener(position,nameCheckBox.getText(),nameCheckBox));
return view;
class OnItemClickListener implements OnClickListener
private int position;
private CharSequence text;
private CheckBox checkBox;
OnItemClickListener(int position, CharSequence text,CheckBox checkBox)
this.position = position;
this.text = text;
this.checkBox = checkBox;
@Override
public void onClick(View arg0)
selectedContacts.append(position, true);
Toast.makeText(getBaseContext(), "Clicked "+position +" and text "+text,Toast.LENGTH_SHORT).show();
public class Contact
private String contactName;
public String getContactName()
return contactName;
public void setContactName(String contactName)
this.contactName = contactName;
我有两个 XML 文件：
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
>
<ListView
android:id="@+id/android:list"
android:layout_
android:layout_
/>
</LinearLayout>
还有：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="horizontal">
<CheckBox android:text=""
android:id="@+id/checkBox"
android:layout_
android:layout_
android:textSize="25sp"/>
</RelativeLayout>
当然我在清单中得到了许可
<uses-permission android:name="android.permission.READ_CONTACTS"/>
谁能告诉我我做错了什么？
谢谢！！
【问题讨论】：
【参考方案1】：尝试使用 ASyncTask 并简化您的实现..
活动
public class YourListActivity extends ListActivity
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(..);
// DoStuff
ListView lv = getListView();
new LoadContacts().execute();
// DoStuff
异步任务
class LoadContacts extends AsyncTask<String, String, String>
@Override
protected void onPreExecute()
super.onPreExecute();
// Do Dialog stuff here
protected String doInBackground(String... args)
// Put your implementation to retrieve contacts here
getContacts();
protected void onPostExecute(String file_url)
// Dismiss Dialog
runOnUiThread(new Runnable()
public void run()
// Create list adapter and notify it
);
【讨论】：
【参考方案2】：代码对我来说似乎很好。我对 ArrayAdapter 不太满意，我更喜欢使用 SimpleAdapter。在阅读了您的目的之后，我认为使用一个简单的适配器似乎很容易实现。 Here's 一个简单的启动。
更多关于 ListView，我认为最好的，总是帮了我很多： http://www.vogella.com/articles/AndroidListView/article.html
还有更多关于 SimpleAdapter 的内容，它真的很简单： http://wptrafficanalyzer.in/blog/listview-with-images-and-text-using-simple-adapter-in-android/
【讨论】：
那么知道为什么我没有看到包含我的联系人的列表吗？我在模拟器中添加了几个联系人，但我看到的只是一个空白列表......以上是关于带复选框的联系人列表的主要内容，如果未能解决你的问题，请参考以下文章