使用AsyncTask异步获取联系人信息

来源：互联网发布：算法第四版高清pdf 编辑：程序博客网时间：2024/04/30 20:49

Activity源代码:

public class ContactsActivity extends Activity {

private final static StringTAG = "ContactsActivity";

private ListViewlistViewContacts;

private ButtonbuttonConfirm;

private ButtonbuttonCancel;

//保存联系人信息

private ArrayList<HashMap<String,String>>contactsItems = new ArrayList<HashMap<String,String>>();

//列名

private final static String CONTACT_NAME = "name";

private final static String CONTACT_PHONE = "phone";

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.contactsview);

initUI();

//执行异步任务

new GetContactsTask().execute(null);

}

//初始化控件

private void initUI(){

listViewContacts = (ListView) findViewById(R.id.listview_contacts);

buttonConfirm = (Button) findViewById(R.id.btn_contacts_confirm);

buttonCancel = (Button) findViewById(R.id.btn_contacts_cancel);

//设置在ListView为空时显示的View

listViewContacts.setEmptyView(findViewById(R.id.ContactsViewEmpty));

}

//获取联系人信息

private void GetContacts(){

//存储单个联系人信息

HashMap<String, String> mMap;

//获得所有的联系人

Cursor cur = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,null, null, null, null);

//循环遍历

if (cur.moveToFirst()) {

int idColumn = cur.getColumnIndex(ContactsContract.Contacts._ID);

int displayNameColumn = cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME);

do {

//获得联系人的ID号

String contactId = cur.getString(idColumn);

//获得联系人姓名

String disPlayName = cur.getString(displayNameColumn);

//查看该联系人有多少个电话号码。如果没有这返回值为0

int phoneCount = cur.getInt(cur.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER));

if(phoneCount>0){

//获得联系人的电话号码

Cursor phones = getContentResolver().query(

ContactsContract.CommonDataKinds.Phone.CONTENT_URI,

null,

ContactsContract.CommonDataKinds.Phone.CONTACT_ID

+" = " + contactId, null, null);

//获取第一个电话号码

if(phones.moveToFirst()){

//do{

//遍历所有的电话号码

String phoneNumber= phones.getString(phones

.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

mMap = new HashMap<String, String>();

//保存联系人姓名

mMap.put(CONTACT_NAME, disPlayName);

//保存联系人第一个电话号码

mMap.put(CONTACT_PHONE, phoneNumber);

contactsItems.add(mMap);

//System.out.println(phoneNumber);

//}while(phones.moveToNext());

} }

} while (cur.moveToNext());

}

//异步Task

private class GetContactsTaskextends AsyncTask<Void,Void,Void>{

@Override

protected Void doInBackground(Void... params) {

GetContacts();

returnnull;

}

@Override

protectedvoid onPostExecute(Void result) {

listViewContacts.setAdapter(new SimpleAdapter(ContactsActivity.this,

contactsItems,

R.layout.contacts_item,

new String[]{CONTACT_NAME,CONTACT_PHONE},

newint[]{R.id.contacts_name,R.id.contacts_phone}));

}

对应的XML文件：(1)contactsview.xml

<?xml version="1.0"encoding="utf-8"?>

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

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical">

<ViewFlipper android:id="@+id/SmsViewFlipper"

android:background="#fff"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

<ListViewandroid:id="@+id/listview_contacts"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:divider="#9c9c9c"

android:dividerHeight="1dp"

</ListView>

<TextView

android:id="@+id/ContactsViewEmpty"

android:textColor="#000"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/nocontacts"

android:layout_gravity="center">

</TextView>

</ViewFlipper>

<LinearLayout

android:id = "@+id/layout01"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:background="@drawable/gradient_orange"

android:layout_alignParentBottom = "true">

<LinearLayout

android:orientation="horizontal"

android:layout_width="fill_parent"

android:layout_height="50dp"

android:gravity="center_vertical"

<Button

android:id="@+id/btn_contacts_confirm"

android:layout_weight="1"

android:layout_width="fill_parent"

android:layout_height="50dp"

android:text="@string/confirm"

</Button>

<Button

android:id="@+id/btn_contacts_cancel"

android:layout_weight="1"

android:layout_width="fill_parent"

android:layout_height="50dp"

android:text="@string/cancel"

android:layout_toRightOf="@+id/btn_contacts_confirm"

</Button>

</LinearLayout>

</RelativeLayout>

(2)contacts_item.xml

<?xml version="1.0"encoding="utf-8"?>

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

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

<LinearLayout

android:id="@+id/contacts_linearlayout"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="wrap_content">

<TextView

android:id="@+id/contacts_name"

style="@style/textviewcontactsnamestyles"

></TextView>

<TextView

android:id="@+id/contacts_phone"

style="@style/textviewcontactsphonestyles"

></TextView>

</LinearLayout>

<CheckBox

android:id="@+id/contacts_checkbox"

android:layout_alignParentRight="true"

android:layout_height="wrap_content"

android:layout_width="wrap_content"></CheckBox>

</RelativeLayout>

转自：http://blog.163.com/supered_yang@126/blog/static/4126004120120565054340/

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