How to use SharedPreferences in Android to store fetch and edit values

Question

I want to store a time value and need to retrieve and edit it  How can I use SharedPreferences to do this

User · Answer

I wanted to add here that most of the snippets for this question will have something like MODE_PRIVATE when using SharedPreferences. Well, MODE_PRIVATE means that whatever you write into this shared preference can only be read by your application only.

Whatever key you pass to getSharedPreferences() method, android creates a file with that name and stores the preference data into it. Also remember that getSharedPreferences() is supposed to be used when you intend to have multiple preference files for your application. If you intend to use single preference file and store all key-value pairs into it then use the getSharedPreference() method. Its weird why everyone (including myself) simply uses getSharedPreferences() flavor without even understanding the difference between the above two.

The following video tutorial should help https://www.youtube.com/watch?v=2PcAQ1NBy98

User · Answer

You can save value using this method   public void savePreferencesForReasonCode Context context      String key  String value        SharedPreferences sharedPreferences   PreferenceManager      getDefaultSharedPreferences context       SharedPreferences Editor editor   sharedPreferences edit        editor putString key  value       editor commit            And using this method you can get value from SharedPreferences   public String getPreferences Context context  String prefKey      SharedPreferences sharedPreferences   PreferenceManager   getDefaultSharedPreferences context    return sharedPreferences getString prefKey           Here prefKey is the key that you used to saved the specific value  Thanks

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2 for Storing in shared prefrence    SharedPreferences Editor editor    getSharedPreferences  DeviceToken  MODE PRIVATE  edit                        editor putString  DeviceTokenkey   ABABABABABABABB12345    editor apply      2 for retrieving the same use      SharedPreferences prefs   getSharedPreferences  DeviceToken     MODE PRIVATE     String deviceToken   prefs getString  DeviceTokenkey   null

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There are many ways people recommend how to use SharedPreferences  I have made a demo project here  Key point in sample is to use ApplicationContext  amp  single sharedpreferences object  This demonstrates how to use SharedPreferences with following features -   Using singelton class to access update SharedPreferences No need to pass context always for read write SharedPreferences It uses apply   instead of commit   apply   is asynchronus save  doesn t return anything  it update value in memory first  amp  changes are written to disk later asynchronusly  commit   is synchronus save  it return true false based on outcome  Changes are written to disk synchronusly works on android 2 3  versions   Usage example as below -  MyAppPreference getInstance   setSampleStringKey  some value    String value  MyAppPreference getInstance   getSampleStringKey      Get source code here  amp  Detailed API s can be found here on developer android com

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To Write   SharedPreferences preferences   getSharedPreferences  quot AUTHENTICATION FILE NAME quot   Context MODE PRIVATE   SharedPreferences Editor editor   preferences edit    editor putString  quot Authentication Id quot  userid getText   toString     editor putString  quot Authentication Password quot  password getText   toString     editor putString  quot Authentication Status quot   quot true quot    editor apply     To Read   SharedPreferences prfs   getSharedPreferences  quot AUTHENTICATION FILE NAME quot   Context MODE PRIVATE   String Astatus   prfs getString  quot Authentication Status quot    quot  quot

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To obtain shared preferences  use the following method In your activity   SharedPreferences prefs   this getSharedPreferences         com example app   Context MODE PRIVATE     To read preferences   String dateTimeKey    com example app datetime       use a default value using new Date   long l   prefs getLong dateTimeKey  new Date   getTime        To edit and save preferences  Date dt   getSomeDate    prefs edit   putLong dateTimeKey  dt getTime    apply      The android sdk s sample directory contains an example of retrieving and storing shared preferences  Its located in the    lt android-sdk-home gt  samples android- lt platformversion gt  ApiDemos directory   Edit     I noticed  it is important to write difference between commit   and apply   here as well   commit   return true if value saved successfully otherwise false  It save values to SharedPreferences synchronously   apply   was added in 2 3 and doesn t return any value either on success or failure  It saves values to SharedPreferences immediately but starts an asynchronous commit  More detail is here

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Basic idea of SharedPreferences is to store things on XML file     Declare your xml file path  if you don t have this file  Android will create it  If you have this file  Android will access it    SharedPreferences prefs   this getSharedPreferences  com example app   Context MODE PRIVATE    Write value to Shared Preferences  prefs edit   putLong  preference file key   1010101  apply      the preference file key is the name of shared preference files  And the 1010101 is the value you need to store    apply   at last is to save the changes  If you get error from apply    change it to commit    So this alternative sentence is  prefs edit   putLong  preference file key   1010101  commit     Read from Shared Preferences  SharedPreferences sp   this getSharedPreferences  com example app   Context MODE PRIVATE   long lsp   sp getLong  preference file key   -1     lsp will be -1 if preference file key has no value  If  preference file key  has a value  it will return the value of this    The whole code for writing is      SharedPreferences prefs   this getSharedPreferences  com example app   Context MODE PRIVATE         Declare xml file     prefs edit   putLong  preference file key   1010101  apply          Write the value to key    The code for reading is      SharedPreferences sf   this getSharedPreferences  com example app   Context MODE PRIVATE         Declare xml file     long lsp   sp getLong  preference file key   -1         Read the key and store in lsp

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To store values in shared preferences   SharedPreferences sp   PreferenceManager getDefaultSharedPreferences this   SharedPreferences Editor editor   sp edit    editor putString  Name   Jayesh    editor commit      To retrieve values from shared preferences   SharedPreferences sp   PreferenceManager getDefaultSharedPreferences this   String name   sp getString  Name           Second parameter is the default value

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Store in SharedPreferences  SharedPreferences preferences   getSharedPreferences  temp   getApplicationContext   MODE PRIVATE   Editor editor   preferences edit    editor putString  name   name   editor commit      Fetch in SharedPreferences  SharedPreferences preferences getSharedPreferences  temp   getApplicationContext   MODE PRIVATE   String name preferences getString  name  null     Note   temp  is sharedpreferences name and  name  is input value  if value does t exit then return null

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To store information  SharedPreferences preferences   getSharedPreferences PREFS NAME Context MODE PRIVATE   SharedPreferences Editor editor   preferences edit    editor putString  username   username getText   toString     editor putString  password   password getText   toString     editor putString  logged    logged    editor commit      To reset your preferences  SharedPreferences Editor editor   preferences edit    editor clear    editor commit

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to save   PreferenceManager getDefaultSharedPreferences this  edit   putString  VarName   your value   apply      to retreive    String name   PreferenceManager getDefaultSharedPreferences this  getString  VarName   defaultValue         default value is   Values to return if this preference does not exist       you can change  this  with getActivity   or getApplicationContext   in   some cases

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In any application  there are default preferences that can accessed through the PreferenceManager instance and its related method getDefaultSharedPreferences Context     With the SharedPreference instance one can retrieve the int value of the any preference with the getInt String key  int defVal   The preference we are interested in this case is counter    In our case  we can modify the SharedPreference instance in our case using the edit   and use the putInt String key  int newVal  We increased the count for our application that presist beyond the application and displayed accordingly   To further demo this  restart and you application again  you will notice that the count will increase each time you restart the application    PreferencesDemo java  Code   package org example preferences  import android app Activity  import android content SharedPreferences  import android os Bundle  import android preference PreferenceManager  import android widget TextView   public class PreferencesDemo extends Activity          Called when the activity is first created          Override     public void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout main               Get the app s shared preferences         SharedPreferences app preferences            PreferenceManager getDefaultSharedPreferences this               Get the value for the run counter         int counter   app preferences getInt  counter   0               Update the TextView         TextView text    TextView  findViewById R id text           text setText  This app has been started     counter     times                 Increment the counter         SharedPreferences Editor editor   app preferences edit            editor putInt  counter     counter           editor commit       Very important           main xml  Code    lt  xml version  1 0  encoding  utf-8   gt   lt LinearLayout xmlns android  http   schemas android com apk res android        android orientation  vertical        android layout width  fill parent        android layout height  fill parent   gt            lt TextView             android id    id text                android layout width  fill parent               android layout height  wrap content               android text   string hello    gt   lt  LinearLayout gt

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To store values in shared preferences   SharedPreferences preferences   PreferenceManager getDefaultSharedPreferences this   SharedPreferences Editor editor   preferences edit    editor putString  Name   Harneet    editor apply      To retrieve values from shared preferences   SharedPreferences preferences   PreferenceManager getDefaultSharedPreferences this   String name   preferences getString  Name        if  name equalsIgnoreCase            name   name      Sethi       Edit the value here

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I write a helper class for sharedpreferences   import android content Context  import android content SharedPreferences          Created by mete  on 23 12 2016      public class HelperSharedPref    Context mContext   public HelperSharedPref Context mContext        this mContext   mContext                param key Constant RC     param value Only String  Integer  Long  Float  Boolean types     public void saveToSharedPref String key  Object value  throws Exception       SharedPreferences Editor editor   mContext getSharedPreferences key  Context MODE PRIVATE  edit        if  value instanceof String            editor putString key   String  value         else if  value instanceof Integer            editor putInt key   Integer  value         else if  value instanceof Long            editor putLong key   Long  value         else if  value instanceof Float            editor putFloat key   Float  value         else if  value instanceof Boolean            editor putBoolean key   Boolean  value         else           throw new Exception  Unacceptable object type               editor commit              Return String     param key     return null default is null     public String loadStringFromSharedPref String key  throws Exception       SharedPreferences prefs   mContext getSharedPreferences key  Context MODE PRIVATE       String restoredText   prefs getString key  null        return restoredText            Return int     param key     return null default is -1     public Integer loadIntegerFromSharedPref String key  throws Exception       SharedPreferences prefs   mContext getSharedPreferences key  Context MODE PRIVATE       Integer restoredText   prefs getInt key  -1        return restoredText            Return float     param key     return null default is -1     public Float loadFloatFromSharedPref String key  throws Exception       SharedPreferences prefs   mContext getSharedPreferences key  Context MODE PRIVATE       Float restoredText   prefs getFloat key  -1        return restoredText            Return long     param key     return null default is -1     public Long loadLongFromSharedPref String key  throws Exception       SharedPreferences prefs   mContext getSharedPreferences key  Context MODE PRIVATE       Long restoredText   prefs getLong key  -1        return restoredText            Return boolean     param key     return null default is false     public Boolean loadBooleanFromSharedPref String key  throws Exception       SharedPreferences prefs   mContext getSharedPreferences key  Context MODE PRIVATE       Boolean restoredText   prefs getBoolean key  false        return restoredText

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editor putString  text   mSaved getText   toString       Here  mSaved can be any TextView or EditText from where we can extract a string  you can simply specify a string  Here text will be the key which hold the value obtained from the mSaved  TextView or EditText        SharedPreferences prefs   this getSharedPreferences  com example app   Context MODE PRIVATE     Also there is no need to save the preference file using the package name i e    com example app   You can mention your own preferred name   Hope this helps

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To edit data from sharedpreference   SharedPreferences Editor editor   getPreferences MODE PRIVATE  edit     editor putString  text   mSaved getText   toString      editor putInt  selection-start   mSaved getSelectionStart      editor putInt  selection-end   mSaved getSelectionEnd      editor apply      To retrieve data from sharedpreference  SharedPreferences prefs   getPreferences MODE PRIVATE    String restoredText   prefs getString  text   null   if  restoredText    null         mSaved setText restoredText  TextView BufferType EDITABLE     int selectionStart   prefs getInt  selection-start   -1     int selectionEnd   prefs getInt  selection-end   -1       if  selectionStart    -1  amp  amp  selectionEnd    -1           mSaved setSelection selectionStart  selectionEnd             Edit  I took this snippet from API Demo sample  It had an EditText box there   In this context it is not required I am commenting the same

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If you are making a large application with other developers in your team and intend to have everything well organized without scattered code or different SharedPreferences instances  you may do something like this     SharedPreferences manager class public class SharedPrefs          SharedPreferences file name     private static String SHARED PREFS FILE NAME    my app shared prefs          here you can centralize all your shared prefs keys     public static String KEY MY SHARED BOOLEAN    my shared boolean       public static String KEY MY SHARED FOO    my shared foo          get the SharedPreferences object instance       create SharedPreferences file if not present       private static SharedPreferences getPrefs Context context            return context getSharedPreferences SHARED PREFS FILE NAME  Context MODE PRIVATE                Save Booleans     public static void savePref Context context  String key  boolean value            getPrefs context  edit   putBoolean key  value  commit                        Get Booleans     public static boolean getBoolean Context context  String key            return getPrefs context  getBoolean key  false                Get Booleans if not found return a predefined default value     public static boolean getBoolean Context context  String key  boolean defaultValue            return getPrefs context  getBoolean key  defaultValue                Strings     public static void save Context context  String key  String value            getPrefs context  edit   putString key  value  commit               public static String getString Context context  String key            return getPrefs context  getString key                  public static String getString Context context  String key  String defaultValue            return getPrefs context  getString key  defaultValue                Integers     public static void save Context context  String key  int value            getPrefs context  edit   putInt key  value  commit               public static int getInt Context context  String key            return getPrefs context  getInt key  0              public static int getInt Context context  String key  int defaultValue            return getPrefs context  getInt key  defaultValue                Floats     public static void save Context context  String key  float value            getPrefs context  edit   putFloat key  value  commit               public static float getFloat Context context  String key            return getPrefs context  getFloat key  0              public static float getFloat Context context  String key  float defaultValue            return getPrefs context  getFloat key  defaultValue                Longs     public static void save Context context  String key  long value            getPrefs context  edit   putLong key  value  commit               public static long getLong Context context  String key            return getPrefs context  getLong key  0              public static long getLong Context context  String key  long defaultValue            return getPrefs context  getLong key  defaultValue                StringSets     public static void save Context context  String key  Set lt String gt  value            getPrefs context  edit   putStringSet key  value  commit               public static Set lt String gt  getStringSet Context context  String key            return getPrefs context  getStringSet key  null              public static Set lt String gt  getStringSet Context context  String key  Set lt String gt  defaultValue            return getPrefs context  getStringSet key  defaultValue             In your activity you may save SharedPreferences this way    saving a boolean into prefs SharedPrefs savePref this  SharedPrefs KEY MY SHARED BOOLEAN  booleanVar     and you may retrieve your SharedPreferences this way    getting a boolean from prefs booleanVar   SharedPrefs getBoolean this  SharedPrefs KEY MY SHARED BOOLEAN

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Here i have created an Helper class to use preferences in android   This is the helper class   public class PrefsUtil    public static SharedPreferences getPreference         return PreferenceManager getDefaultSharedPreferences Applicatoin getAppContext        public static void putBoolean String key  boolean value        getPreference   edit   putBoolean key  value               apply       public static boolean getBoolean String key        return getPreference   getBoolean key  false      public static void putInt String key  int value         getPreference   edit   putInt key  value  apply        public static void delKey String key         getPreference   edit   remove key  apply

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I have created a Helper class to make my Life easy  This is a generic class and has a-lot of methods those are commonly used in Apps like Shared Preferences  Email Validity  Date Time Format  Copy this class in your code and access it s methods wherever you need    import android app AlertDialog   import android app ProgressDialog   import android content Context   import android content DialogInterface   import android content SharedPreferences   import android support v4 app FragmentActivity   import android view inputmethod InputMethodManager   import android widget EditText   import android widget Toast    import java text ParseException   import java text SimpleDateFormat   import java util Date   import java util Random   import java util regex Matcher   import java util regex Pattern   import java util regex PatternSyntaxException         Created by Zohaib Hassan on 3 4 2016      public class Helper    private static ProgressDialog pd   public static void saveData String key  String value  Context context        SharedPreferences sp   context getApplicationContext                getSharedPreferences  appData   0       SharedPreferences Editor editor      editor   sp edit        editor putString key  value       editor commit       public static void deleteData String key  Context context       SharedPreferences sp   context getApplicationContext                getSharedPreferences  appData   0       SharedPreferences Editor editor      editor   sp edit        editor remove key       editor commit        public static String getSaveData String key  Context context        SharedPreferences sp   context getApplicationContext                getSharedPreferences  appData   0       String data   sp getString key           return data         public static long dateToUnix String dt  String format        SimpleDateFormat formatter      Date date   null      long unixtime      formatter   new SimpleDateFormat format       try           date   formatter parse dt         catch  Exception ex             ex printStackTrace              unixtime   date getTime        return unixtime      public static String getData long unixTime  String formate         long unixSeconds   unixTime      Date date   new Date unixSeconds       SimpleDateFormat sdf   new SimpleDateFormat formate       String formattedDate   sdf format date       return formattedDate     public static String getFormattedDate String date  String currentFormat                                        String desiredFormat        return getData dateToUnix date  currentFormat   desiredFormat         public static double distance double lat1  double lon1  double lat2                                double lon2  char unit        double theta   lon1 - lon2      double dist   Math sin deg2rad lat1     Math sin deg2rad lat2                 Math cos deg2rad lat1     Math cos deg2rad lat2                 Math cos deg2rad theta        dist   Math acos dist       dist   rad2deg dist       dist   dist   60   1 1515      if  unit     K             dist   dist   1 609344        else if  unit     N             dist   dist   0 8684            return  dist                                                                                      This function converts decimal degrees to radians                                                                                private static double deg2rad double deg        return  deg   Math PI   180 0                                                                                      This function converts radians to decimal degrees                                                                                private static double rad2deg double rad        return  rad   180 0   Math PI      public static int getRendNumber         Random r   new Random        return r nextInt 360      public static void hideKeyboard Context context  EditText editText        InputMethodManager imm    InputMethodManager  context              getSystemService Context INPUT METHOD SERVICE       imm hideSoftInputFromWindow editText getWindowToken    0      public static void showLoder Context context  String message        pd   new ProgressDialog context        pd setCancelable false       pd setMessage message       pd show       public static void showLoderImage Context context  String message        pd   new ProgressDialog context       pd setProgressStyle ProgressDialog STYLE HORIZONTAL       pd setCancelable false       pd setMessage message       pd show       public static void dismissLoder         pd dismiss       public static void toast Context context  String text         Toast makeText context  text  Toast LENGTH LONG  show              public static Boolean connection Context context        ConnectionDetector connection   new ConnectionDetector context       if   connection isConnectingToInternet               Helper showAlert context   No Internet access                  Helper toast context   No internet access               return false        else         return true       public static void removeMapFrgment FragmentActivity fa  int id         android support v4 app Fragment fragment      android support v4 app FragmentManager fm      android support v4 app FragmentTransaction ft      fm   fa getSupportFragmentManager        fragment   fm findFragmentById id       ft   fa getSupportFragmentManager   beginTransaction        ft remove fragment       ft commit        public static AlertDialog showDialog Context context  String message        AlertDialog Builder builder   new AlertDialog Builder context       builder setMessage message        builder setPositiveButton  OK   new DialogInterface OnClickListener               Override         public void onClick DialogInterface dialog  int id                   TODO Auto-generated method stub                         return builder create       public static void showAlert Context context  String message        AlertDialog Builder builder   new AlertDialog Builder context       builder setTitle  Alert        builder setMessage message               setPositiveButton  Ok   new DialogInterface OnClickListener                     public void onClick DialogInterface dialog  int id                        dialog dismiss                                     show       public static boolean isURL String url        if  url    null          return false       boolean foundMatch   false      try           Pattern regex   Pattern                  compile                             b    https  ftp file     www      -A-Z0-9  amp                  A-Z0-9  amp               -A-Z0-9  amp                   A-Z0-9  amp                                      Pattern CASE INSENSITIVE   Pattern UNICODE CASE           Matcher regexMatcher   regex matcher url           foundMatch   regexMatcher matches            return foundMatch        catch  PatternSyntaxException ex               Syntax error in the regular expression         return false           public static boolean atLeastOneChr String string        if  string    null          return false       boolean foundMatch   false      try           Pattern regex   Pattern compile   a-zA-Z0-9                    Pattern CASE INSENSITIVE   Pattern UNICODE CASE           Matcher regexMatcher   regex matcher string           foundMatch   regexMatcher matches            return foundMatch        catch  PatternSyntaxException ex               Syntax error in the regular expression         return false           public static boolean isValidEmail String email  Context context        String expression        w   -       w  -        A-Z  2 4         CharSequence inputStr   email      Pattern pattern   Pattern compile expression  Pattern CASE INSENSITIVE       Matcher matcher   pattern matcher inputStr       if  matcher matches              return true        else              Helper toast context   Email is not valid                return false           public static boolean isValidUserName String email  Context context        String expression      0-9a-zA-Z          CharSequence inputStr   email      Pattern pattern   Pattern compile expression  Pattern CASE INSENSITIVE       Matcher matcher   pattern matcher inputStr       if  matcher matches              return true        else           Helper toast context   Username is not valid               return false           public static boolean isValidDateSlash String inDate        SimpleDateFormat dateFormat   new SimpleDateFormat  dd mm yyyy        dateFormat setLenient false       try           dateFormat parse inDate trim           catch  ParseException pe            return false            return true     public static boolean isValidDateDash String inDate        SimpleDateFormat dateFormat   new SimpleDateFormat  dd-mm-yyyy        dateFormat setLenient false       try           dateFormat parse inDate trim           catch  ParseException pe            return false            return true     public static boolean isValidDateDot String inDate        SimpleDateFormat dateFormat   new SimpleDateFormat  dd mm yyyy        dateFormat setLenient false       try           dateFormat parse inDate trim           catch  ParseException pe            return false            return true

User · Answer

SharedPreferences Editor editor   getSharedPreferences  identifier    MODE PRIVATE  edit      identifier is the unique to fetch data from your SharedPreference    editor putInt  keyword   0       saved value place with 0    use this  keyword  to fetch saved value again  editor commit     important line without this line your value is not stored in preference        fetch the stored data using       SharedPreferences prefs   getSharedPreferences  identifier   MODE PRIVATE       here both identifier will same  int fetchvalue   prefs getInt  keyword   0      here keyword will same as used above     0 is default value when you nothing save in preference that time fetch value is 0    you need to use SharedPreferences in AdapterClass or any other  that time just use this declaration and use same ass above   SharedPreferences Editor editor   context getSharedPreferences  idetifier    Context MODE PRIVATE  edit    SharedPreferences prefs   context getSharedPreferences  identifier   Context MODE PRIVATE      here context is your application context   for string or boolean value   editor putString  stringkeyword    your string     editor putBoolean  booleankeyword   your boolean value    editor commit      fetch data same as above   String fetchvalue   prefs getString  keyword        Boolean fetchvalue   prefs getBoolean  keyword

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Simple solution of how to store login value in by SharedPreferences   You can extend the MainActivity class or other class where you will store the  value of something you want to keep   Put this into writer and reader classes   public static final String GAME PREFERENCES LOGIN    Login     Here InputClass is input and OutputClass is output class  respectively      This is a storage  put this in a class which you can extend or in both classes     input and output  public static final String GAME PREFERENCES LOGIN    Login       String from the text input  can be from anywhere  String login   inputLogin getText   toString        then to add a value in InputCalss  SAVE   SharedPreferences example   getSharedPreferences GAME PREFERENCES LOGIN  0   Editor editor   example edit    editor putString  value   login   editor commit      Now you can use it somewhere else  like other class  The following is OutputClass   SharedPreferences example   getSharedPreferences GAME PREFERENCES LOGIN  0   String userString   example getString  value    defValue        the following will print it out in console Logger getLogger  Name of a OutputClass  class getName    log Level INFO  userString

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To store values in shared preferences   SharedPreferences sp   PreferenceManager getDefaultSharedPreferences this   SharedPreferences Editor editor   sp edit    editor putString  Name   Jayesh    editor commit      To retrieve values from shared preferences   SharedPreferences sp   PreferenceManager getDefaultSharedPreferences this   String name   sp getString  Name

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Setting values in Preference      MY PREFS NAME - a static String variable like     public static final String MY PREFS NAME    MyPrefsFile   SharedPreferences Editor editor   getSharedPreferences MY PREFS NAME  MODE PRIVATE  edit     editor putString  name    Elena     editor putInt  idName   12    editor commit      Retrieve data from preference   SharedPreferences prefs   getSharedPreferences MY PREFS NAME  MODE PRIVATE    String restoredText   prefs getString  text   null   if  restoredText    null      String name   prefs getString  name    No name defined      No name defined  is the default value    int idName   prefs getInt  idName   0     0 is the default value      more info   Using Shared Preferences  Shared Preferences

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Using this simple library  here is how you make the calls to SharedPreferences    TinyDB tinydb   new TinyDB context    tinydb putInt  clickCount   2    tinydb putString  userName    john    tinydb putBoolean  isUserMale   true     tinydb putList  MyUsers   mUsersArray   tinydb putImagePNG  DropBox WorkImages    MeAtlunch png   lunchBitmap      These plus the corresponding get methods are all Included

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To store and retrieve global variables in a function way   To test  make sure you have Textview items on your page  uncomment the two lines in the code and run  Then comment the two lines again  and run  Here the id of the TextView is username and password   In every Class where you want to use it  add these two routines at the end   I would like this routine to be global routines  but do not know how  This works   The variabels are available everywhere  It stores the variables in  MyFile   You may change it your way   You call it using   storeSession  username   frans     storeSession  password    2 4          the variable username will be filled with  frans  and the password with   2 4    Even after a restart they are available   and you retrieve it using   password setText getSession   password       usernames setText getSession   username        below the entire code of my grid java      package nl yentel yenteldb2      import android content SharedPreferences      import android os Bundle      import android support design widget FloatingActionButton      import android support design widget Snackbar      import android support v7 app AppCompatActivity      import android support v7 widget Toolbar      import android view View      import android widget EditText      import android widget TextView       public class Grid extends AppCompatActivity       private TextView usernames      private TextView password        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState          setContentView R layout activity grid           Toolbar toolbar    Toolbar  findViewById R id toolbar           setSupportActionBar toolbar            FloatingActionButton fab    FloatingActionButton  findViewById R id fab           fab setOnClickListener new View OnClickListener                  Override             public void onClick View view                    Snackbar make view   Replace with your own action   Snackbar LENGTH LONG                           setAction  Action   null  show                                      getSupportActionBar   setDisplayHomeAsUpEnabled true                 storeSession  username   frans eilering gmail com              storeSession  password   mijn wachtwoord               password    TextView  findViewById R id password           password setText getSession   password              usernames  TextView  findViewById R id username           usernames setText getSession   username                 public void storeSession String key  String waarde             SharedPreferences pref   getApplicationContext   getSharedPreferences  MyFile   MODE PRIVATE           SharedPreferences Editor editor   pref edit            editor putString key  waarde           editor commit               public String getSession String key      http   androidexample com Android SharedPreferences Basics index php view article discription amp aid 126 amp aaid 146         SharedPreferences pref   getApplicationContext   getSharedPreferences  MyFile   MODE PRIVATE           SharedPreferences Editor editor   pref edit            String output   pref getString key  null           return output                 below you find the textview items   lt TextView     android layout width  wrap content      android layout height  wrap content      android text  usernames      android id    id username      android layout below    id textView      android layout alignParentStart  true      android layout marginTop  39dp      android hint  hier komt de username    gt     lt TextView     android layout width  wrap content      android layout height  wrap content      android text  password      android id    id password      android layout below    id user      android layout alignParentStart  true      android hint  hier komt het wachtwoord    gt

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Best practice ever  Create Interface named with PreferenceManager      Interface to save values in shared preferences and also for retrieve values from shared preferences public interface PreferenceManager        SharedPreferences getPreferences        Editor editPreferences         void setString String key  String value       String getString String key        void setBoolean String key  boolean value       boolean getBoolean String key        void setInteger String key  int value       int getInteger String key        void setFloat String key  float value       float getFloat String key        How to use with Activity   Fragment   public class HomeActivity extends AppCompatActivity implements PreferenceManager        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity home               Override     public SharedPreferences getPreferences            return getSharedPreferences  SP TITLE   Context MODE PRIVATE               Override     public SharedPreferences Editor editPreferences            return getPreferences   edit                Override     public void setString String key  String value            editPreferences   putString key  value  commit                Override     public String getString String key            return getPreferences   getString key                   Override     public void setBoolean String key  boolean value            editPreferences   putBoolean key  value  commit                Override     public boolean getBoolean String key            return  getPreferences   getBoolean key  false               Override     public void setInteger String key  int value            editPreferences   putInt key  value  commit                Override     public int getInteger String key            return getPreferences   getInt key  0               Override     public void setFloat String key  float value            editPreferences   putFloat key  value  commit                Override     public float getFloat String key            return getPreferences   getFloat key  0             Note  Replace your key of SharedPreference with SP TITLE   Examples   Store string in shareperence    setString  my key    my value      Get string from shareperence   String strValue   getString  my key      Hope this will help you

User · Answer

Easiest way   To save   getPreferences MODE PRIVATE  edit   putString  Name of variable  value  commit      To retrieve   your variable   getPreferences MODE PRIVATE  getString  Name of variable  default value

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Singleton Shared Preferences Class  it may help for others in future   import android app Activity  import android content Context  import android content SharedPreferences   public class SharedPref       private static SharedPreferences mSharedPref      public static final String NAME    NAME       public static final String AGE    AGE       public static final String IS SELECT    IS SELECT        private SharedPref                     public static void init Context context                if mSharedPref    null              mSharedPref   context getSharedPreferences context getPackageName    Activity MODE PRIVATE              public static String read String key  String defValue            return mSharedPref getString key  defValue              public static void write String key  String value            SharedPreferences Editor prefsEditor   mSharedPref edit            prefsEditor putString key  value           prefsEditor commit               public static boolean read String key  boolean defValue            return mSharedPref getBoolean key  defValue              public static void write String key  boolean value            SharedPreferences Editor prefsEditor   mSharedPref edit            prefsEditor putBoolean key  value           prefsEditor commit               public static Integer read String key  int defValue            return mSharedPref getInt key  defValue              public static void write String key  Integer value            SharedPreferences Editor prefsEditor   mSharedPref edit            prefsEditor putInt key  value  commit              Simply call SharedPref init   on MainActivity once  SharedPref init getApplicationContext       To Write data   SharedPref write SharedPref NAME   XXXX     save string in shared preference  SharedPref write SharedPref AGE  25    save int in shared preference  SharedPref write SharedPref IS SELECT  true    save boolean in shared preference    To Read Data  String name   SharedPref read SharedPref NAME  null    read string in shared preference  int age   SharedPref read SharedPref AGE  0    read int in shared preference  boolean isSelect   SharedPref read SharedPref IS SELECT  false    read boolean in shared preference

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Edit  SharedPreferences pref   getSharedPreferences  YourPref   MODE PRIVATE   SharedPreferences Editor editor   pref edit    editor putString  yourValue   value   editor commit      Read  SharedPreferences pref   getSharedPreferences  YourPref   MODE PRIVATE   value  pref getString  yourValue

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Use used this example simple and clear and checked   lt  xml version  1 0  encoding  utf-8   gt   lt manifest xmlns android  http   schemas android com apk res android     package  com example sairamkrishna myapplication   gt       lt application       android allowBackup  true        android icon   mipmap ic launcher        android label   string app name        android theme   style AppTheme   gt          lt activity          android name   MainActivity           android label   string app name   gt             lt intent-filter gt               lt action android name  android intent action MAIN    gt               lt category android name  android intent category LAUNCHER    gt            lt  intent-filter gt          lt  activity gt       lt  application gt   lt  manifest gt    public class MainActivity extends AppCompatActivity      EditText ed1 ed2 ed3     Button b1      public static final String MyPREFERENCES    MyPrefs       public static final String Name    nameKey      public static final String Phone    phoneKey      public static final String Email    emailKey       SharedPreferences sharedpreferences       Override    protected void onCreate Bundle savedInstanceState          super onCreate savedInstanceState         setContentView R layout activity main          ed1  EditText findViewById R id editText         ed2  EditText findViewById R id editText2         ed3  EditText findViewById R id editText3          b1  Button findViewById R id button         sharedpreferences   getSharedPreferences MyPREFERENCES  Context MODE PRIVATE          b1 setOnClickListener new View OnClickListener               Override          public void onClick View v                String n    ed1 getText   toString                String ph    ed2 getText   toString                String e    ed3 getText   toString                 SharedPreferences Editor editor   sharedpreferences edit                 editor putString Name  n               editor putString Phone  ph               editor putString Email  e               editor commit                Toast makeText MainActivity this  Thanks  Toast LENGTH LONG  show

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Simple and hassle-free      Android-SharedPreferences-Helper  library  Better late than never  I created the  Android-SharedPreferences-Helper  library to help reduce the complexity and effort of using SharedPreferences  It also provides some extended functionality  Few things that it offers are as follows         One line initialization and setup   Easily selecting whether to use default preferences or a custom preference file   Predefined  data type defaults  and customizable  what you may choose  default values for each datatype   Ability to set different default value for single use with just an additional param   You can register and unregister OnSharedPreferenceChangeListener as you do for default class      dependencies                       compile group   com viralypatel sharedpreferenceshelper   name   library   version   1 1 0   ext   aar          Declaration of SharedPreferencesHelper object   recommended at class   level    SharedPreferencesHelper sph        Instantiation of the SharedPreferencesHelper object   recommended in   onCreate   method       use one of the following ways to instantiate sph   new SharedPreferencesHelper this     this will use default shared preferences sph   new SharedPreferencesHelper this   myappprefs       this will create a named shared preference file sph   new SharedPreferencesHelper this   myappprefs   0      this will allow you to specify a mode      Putting values into shared preferences   Fairly simple  Unlike the default way  when using the SharedPreferences class  you ll NOT need to call  edit   and  commit   ever time   sph putBoolean  boolKey   true   sph putInt  intKey   123   sph putString  stringKey    string value    sph putLong  longKey   456876451   sph putFloat  floatKey   1 51f       putStringSet is supported only for android versions above HONEYCOMB Set name   new HashSet    name add  Viral    name add  Patel    sph putStringSet  name   name     That s it  Your values are stored in the shared preferences      Getting values from shared preferences   Again  just one simple method call with the key name   sph getBoolean  boolKey    sph getInt  intKey    sph getString  stringKey    sph getLong  longKey    sph getFloat  floatKey        getStringSet is supported only for android versions above HONEYCOMB sph getStringSet  name         It has a lot of other extended functionality   Check the details of extended functionality  usage and installation instructions etc on the GitHub Repository Page

[android] How to use SharedPreferences in Android to store, fetch and edit values

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