[Reprinted] Android 2.3.3 API reads the phone number instance in the address book

I recently started to learn about Android, mainly focusing on the secrets of Android Application Development. In chapter 3rd, example_03_02 is an example of reading the name and phone number of contacts in the address book. However, due to API 2.0, each contact can have multiple phone numbers (such as mobile phones, residential buildings, companies, and faxes). The original Instance of the book reports an error in API 2.0.

Example_03_02 in the bookCode:

View code

 Package  Com. Yarin. Android. examples_03_02;  Import  Android. App. activity;  Import  Android. content. contentresolver;  Import  Android. database. cursor;  Import  Android. OS. Bundle; Import  Android. provider. contactscontract;  Import  Android. provider. contactscontract. phonelookup;  Import  Android. util. log;  Import  Android. widget. textview;  Import  Org. Apache. commons. Lang. stringutils;  Public   Class Activity01 Extends  Activity { Public   Void  Oncreate (bundle savedinstancestate) {textview TV = New Textview ( This  ); String = "" ;  Super  . Oncreate (savedinstancestate );  //  Obtain the contentresolver object. Contentresolver Cr = Getcontentresolver ();  // Get the cursor of the first item in the phone book Cursor cursor = Cr. Query (contactscontract. Contacts. content_uri, Null , Null , Null , Null  ); Log. I ( "Tag" , Integer. tostring (cursor. getcolumncount (); log. I ( "Tag", stringutils. Join (cursor. getcolumnnames (),"," ));  //  Move the cursor down          While (Cursor. movetonext ()){  //  Get contact name              Int Namefieldcolumnindex = Cursor. getcolumnindex (phonelookup. display_name); string contact = Cursor. getstring (namefieldcolumnindex );  //  Get the phone number (this method reports an error because one contact may have multiple phone numbers)  //  Int numberfieldcolumnindex = cursor. getcolumnindex (phonelookup. _ id );  // String number = cursor. getstring (numberfieldcolumnindex );  //  String + = (contact + ":" + number + "\ n ");  //  New method for obtaining phone numbers String contactid = Cursor. getstring (cursor. getcolumnindex (contactscontract. Contacts. _ id); cursor phone = Cr. Query (contactscontract. commondatakinds. Phone. content_uri, Null , Contactscontract. commondatakinds. Phone. contact_id + "=" + contactid, Null , Null  ); While  (Phone. movetonext () {string phonenumber = Phone. getstring (phone. getcolumnindex (contactscontract. commondatakinds. Phone. Number); string + = (Contact + ":" + phonenumber + "\ n" ) ;}} Cursor. Close ();  //  Set the content displayed in textview  TV. settext (string );  //  Display to screen  Setcontentview (TV );}} 

The original code has been annotated by me and the correct code has been modified.

What if we only want to get the mobile phone number?

 
Cursor phone = Cr. Query (contactscontract. commondatakinds. Phone. content_uri,Null, Contactscontract. commondatakinds. Phone. contact_id+ "=" + Contactid,Null,Null);
 

Change the preceding statement:

 
Cursor phone = Cr. Query (contactscontract. commondatakinds. Phone. content_uri,Null, Contactscontract. commondatakinds. Phone. contact_id+ "=" + Contactid + "and" +Contactscontract. commondatakinds. Phone. Type+ "=" + Contactscontract. commondatakinds. Phone. type_mobile,Null,Null);
 

Contactscontract. commondatakinds. Phone. type indicates the contact phone type, which corresponds to the following:
Type_mobile: mobile phone number
Type_home: residential phone number
Type_work: company phone number

 

Add the main. XML code.

 

 <?  XML version = "1.0" encoding = "UTF-8"  ?>  <  Linearlayout  Xmlns: Android  = "Http://schemas.android.com/apk/res/android"  Android: Orientation  = "Vertical" Android: layout_width  = "Fill_parent"  Android: layout_height  = "Fill_parent"      >  <  Textview  Android: layout_width  = "Fill_parent"  Android: layout_height  = "Wrap_content"  Android: Text  = "@ String/hello"      />  </ Linearlayout  >