Save preference settings for users in the Android app (Chuanzhi podcast video notes)

The XML file generated by the application is saved in/data/application package name/shared_prefs/name. xml.

(/Data/Data/COM. sinaapp. Shared/Shared_prefs/ssun. XML)

Sharedpreferenceactivity. Java source code:

Package COM. sinaapp. shared; </P> <p> Import Java. util. map; </P> <p> Import COM. sinaapp. service. service; </P> <p> Import android. app. activity; <br/> Import android. OS. bundle; <br/> Import android. view. view; <br/> Import android. view. view. onclicklistener; <br/> Import android. widget. edittext; <br/> Import android. widget. toast; </P> <p> public class sharedpreferenceactivity extends activity {<br/>/** called when Activity is first created. */<br/> edittext nametext; <br/> edittext agetext; <br/> Service; <br/> Map <string, string> map; </P> <p> @ override <br/> Public void oncreate (bundle savedinstancestate) {<br/> super. oncreate (savedinstancestate); <br/> setcontentview (R. layout. main); <br/> nametext = (edittext) This. findviewbyid (R. id. nametext); <br/> agetext = (edittext) This. findviewbyid (R. id. agetext); <Br/> service = new service (this); <br/> map = service. getpreference (); <br/> nametext. settext (map. get ("name"); <br/> agetext. settext (map. get ("Age"); <br/>}</P> <p> Public void save (view v) {<br/> string name = nametext. gettext (). tostring (); <br/> int age = integer. parseint (agetext. gettext (). tostring (); <br/> service. save (name, age); <br/> toast. maketext (getapplicationcontext (), "Save success! ", Toast. length_long). Show (); <br/>}< br/>}
Service. Java source code:

Package COM. sinaapp. service; </P> <p> Import Java. util. hashmap; <br/> Import Java. util. map; </P> <p> Import android. content. context; <br/> Import android. content. sharedpreferences; <br/> Import android. content. sharedpreferences. editor; </P> <p> public class service {<br/> private context; </P> <p> Public Service (context) {<br/> This. context = context; <br/>}</P> <p>/** <br/> * Save the parameter <br/> * @ Param name <br/> * @ Param age <br /> */<br/> Public void save (string name, int age) {<br/> sharedpreferences preferences = context. getsharedpreferences ("ssun", context. mode_private); <br/> editor edit = preferences. edit (); <br/> edit. putstring ("name", name); <br/> edit. putint ("Age", age); <br/> edit. commit (); <br/>}</P> <p>/** <br/> * @ return parameters previously set <br/> */<br/> Public Map <string, string> getpreference () {<br/> sharedpreferences preferences = context. getsharedpreferences ("ssun", context. mode_private); <br/> Map <string, string> map = new hashmap <string, string> (); <br/> map. put ("name", preferences. getstring ("name", ""); <br/> map. put ("Age", String. valueof (preferences. getint ("Age", 0); <br/> return map; <br/>}< br/>
Main. xml file:

<? XML version = "1.0" encoding = "UTF-8"?> <Br/> <linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "fill_parent" <br/> Android: Orientation = "vertical"> </P> <p> <textview <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content" <br/> Android: TEXT = "@ string/Name"/> </P> <p> <edittext <br/> Android: Id = "@ + ID/nametext" <br/> Android: layout_width = "match_parent" <br/> Android: layout_height = "wrap_content" <br/> Android: inputtype = "text" <br/> Android: EMS = "10"> </P> <p> <requestfocus/> <br/> </edittext> </P> <p> <textview <br/> Android: layout_width = "wrap_content" <br/> Android: layout_height = "wrap_content" <br/> Android: TEXT = "@ string/age"/> </P> <p> <edittext <br/> Android: Id = "@ + ID/agetext" <br/> Android: layout_width = "match_parent" <br/> Android: layout_height = "wrap_content" <br/> Android: inputtype = "Number" <br/> Android: EMS = "10"/> </P> <p> <button <br/> Android: Id = "@ + ID/button1" <br/> Android: layout_width = "wrap_content" <br/> Android: layout_height = "wrap_content" <br/> Android: text = "@ string/Save" <br/> Android: onclick = "save"/> </P> <p> </linearlayout>
Strings. xml file:

<? XML version = "1.0" encoding = "UTF-8"?> <Br/> <resources> </P> <p> <string name = "name"> name </string> <br/> <string name = "Age"> Age </string> <br/> <string name = "app_name"> USER parameter settings </string> <br/> <string name = "save"> Save </string> <br/> </resources>