Android development searches for the address book to obtain contact information

Import Android. App. activity;

Import Android. content. intent;

Import Android. database. cursor;

Import android.net. Uri;

Import Android. OS. Bundle;

Import Android. provider. contactscontract;

Import Android. View. view;

Import Android. widget. Button;

Import Android. widget. edittext;

Import Android. widget. textview;

Import Android. widget. Toast;

Public class phonebook extends activity {

/* Declare four UI variables and a constant as the return value received by the activity */

Private textview mtextview01;

Private button mbutton01;

Private edittext medittext01;

Private edittext medittext02;

Private Static final int pick_contact_subactivity = 2;

/** Called when the activity is first created .*/

@ Override

Public void oncreate (bundle savedinstancestate)

{

Super. oncreate (savedinstancestate );

Setcontentview (R. layout. Main );

/* Use findviewbyid to construct a textview, two edittexts, and one button object **/

Mtextview01 = (textview) findviewbyid (R. Id. mytextview1 );

Medittext01 = (edittext) findviewbyid (R. Id. myedittext01 );

Medittext02 = (edittext) findviewbyid (R. Id. myedittext02 );

Mbutton01 = (button) findviewbyid (R. Id. mybutton1 );

/* Set onclicklistener to allow users to search for contacts when clicking the button */

Mbutton01.setonclicklistener (New button. onclicklistener ()

{



// @ Override

Public void onclick (view V)

{

// Todo auto-generated method stub

/* Construct a URI to obtain the contact's resource location */

// URI uri = URI. parse ("content: // contacts/people /");

/* Use intent to retrieve contact data and return the selected value */

// Intent = new intent (intent. action_pick, Uri );

/* Start a new activity and expect it to return a value */

// Startactivityforresult (intent, pick_contact_subactivity );

Startactivityforresult

(

New intent (intent. action_pick,


Android. provider. contactscontract. Contacts. content_uri ),

Pick_contact_subactivity );

}

});

}

@ Override

Protected void onactivityresult (INT requestcode, int resultcode,
Intent data)

{

// Todo auto-generated method stub

Try

{

Switch (requestcode)

{

Case pick_contact_subactivity:

Final URI uriret = data. getdata ();

If (uriret! = NULL)

{

Try

{

/* Android. Permission. read_contacts permissions must be granted */

Cursor c = managedquery (uriret, null,
Null );

/* Move cursor to the data frontend */

C. movetofirst ();

/* Obtain the contact name */

String strname =
C. getstring (C. getcolumnindexorthrow (contactscontract. Contacts. display_name ));

/* Write the name to edittext01 */

Medittext01.settext (strname );

/* Obtain the contact's phone number */

Int contactid =
C. getint (C. getcolumnindex (contactscontract. Contacts. _ id ));

Cursor phones = getcontentresolver (). Query (
Contactscontract. commondatakinds. Phone. content_uri, null,
Contactscontract. commondatakinds. Phone. contact_id + "=" + contactid,
Null, null );

Stringbuffer sb = new stringbuffer ();

Int typephone, restype;

String numphone;

If (phones. getcount ()> 0)

{

Phones. movetofirst ();

/* 2.0 allow the user to set multiple phone numbers, but in this example, only one group of phone numbers are available for demonstration */

Typephone = phones. getint (
Phones. getcolumnindex (contactscontract. commondatakinds. Phone. type ));

Numphone = phones. getstring (
Phones. getcolumnindex (contactscontract. commondatakinds. Phone. Number ));

Restype =
Contactscontract. commondatakinds. Phone. gettypelabelresource (typephone );

SB. append (getstring (restype) + ":" + numphone
+ "/N ");

/* Write the phone number to edittext02 */

Medittext02.settext (numphone );

}

Else

{

SB. append ("no phone number found ");

}

/* Whether toast reads the complete phone type and phone number */

Toast. maketext (this, SB. tostring (),
Toast. length_short). Show ();

}

Catch (exception E)

{

/* Display the error message in textview */

Mtextview01.settext (E. tostring ());

E. printstacktrace ();

}

}

Break;

Default: break;

}

}

Catch (exception E)

{

E. printstacktrace ();

}

Super. onactivityresult (requestcode, resultcode, data );

}

}

-------------------------

String. xml

<? XML version = "1.0" encoding = "UTF-8"?>

<Resources>

<String name = "app_name"> phonebook </string>

<String name = "str_button1"> Search </string>

<String name = "str_title"> my contacts </string>

<String name = "str_name"> name </string>

<String name = "str_telephone"> phone number </string>

</Resources>

-----------------------------

Main. xml

<? XML version = "1.0" encoding = "UTF-8"?>

<Absolutelayout

Android: Id = "@ + ID/widget32"

Android: layout_width = "fill_parent"

Android: layout_height = "fill_parent"

Xmlns: Android = "http://schemas.android.com/apk/res/android"

>

<Textview

Android: Id = "@ + ID/mytextview1"

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"

Android: text = "@ string/str_title"

Android: layout_x = "0px"

Android: layout_y = "0px"

>

</Textview>

<Edittext

Android: Id = "@ + ID/myedittext01"

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"

Android: text = "@ string/str_name"

Android: textsize = "18sp"

Android: layout_x = "0px"

Android: layout_y = "22px"

>

</Edittext>

<Edittext

Android: Id = "@ + ID/myedittext02"

Android: layout_width = "fill_parent"

Android: layout_height = "wrap_content"

Android: text = "@ string/str_telephone"

Android: textsize = "18sp"

Android: layout_x = "0px"

Android: layout_y = "82px"

>

</Edittext>

<Button

Android: Id = "@ + ID/mybutton1"

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"

Android: text = "@ string/str_button1"

Android: layout_x = "10px"

Android: layout_y = "142px"

>

</Button>

</Absolutelayout>

------------------------------------

Androidmanifest. xml

Note that after </Application>, add

<Uses-Permission
Android: Name = "android. Permission. read_contacts"> </uses-Permission>

<! -- Get the permission to read the address book -->