How to change current Theme at runtime in Android

Question

I ve created a PreferenceActivity that allows the user to choose the theme he wants to apply to the entire application   When the user selects a theme  this code is executed   if             getApplication   setTheme R style BlackTheme     else       getApplication   setTheme R style LightTheme       But  even though I ve checked with the debugger that the code is being executed  I can t see any change in the user interface   Themes are defined in res values styles xml  and Eclipse does not show any error    lt resources gt       lt style name  LightTheme  parent   android style Theme Light  gt       lt  style gt        lt style name  BlackTheme  parent   android style Theme Black  gt       lt  style gt       lt  resources gt    Any idea about what could be happening and how to fix it  Should I call setTheme at any special point in the code  My application consists of several Activities if that helps

User · Answer

We have to set theme before calling  super onCreate    and  setContentView    method   Check out this link for applying new theme to whole application at runtime

User · Answer

This had no effect for me   public void changeTheme int newTheme        setTheme newTheme       recreate        But this worked   int theme   R style default   protected void onCreate Bundle savedInstanceState        setTheme this theme       super onCreate savedInstanceState      public void changeTheme int newTheme        this theme   newTheme      recreate

User · Answer

I would like to see the method too  where you set once for all your activities  But as far I know you have to set in each activity before showing any views   For reference check this   http   www anddev org applying a theme to your application-t817 html  Edit  copied from that forum        protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState               Call setTheme before creation of any    View           setTheme android R style Theme Dark                           setContentView R layout main            Edit  If you call setTheme after super onCreate savedInstanceState   your activity recreated but if you call setTheme before super onCreate savedInstanceState   your theme will set and activity  does not recreate anymore    protected void onCreate Bundle savedInstanceState         setTheme android R style Theme Dark        super onCreate savedInstanceState                    setContentView R layout main

User · Answer

I know that i am late but i would like to post a solution here   Check the full source code here   This is the code i used when changing theme using preferences    SharedPreferences pref   PreferenceManager          getDefaultSharedPreferences this   String themeName   pref getString  prefSyncFrequency3    Theme1    if  themeName equals  Africa          setTheme R style AppTheme     else if  themeName equals  Colorful Beach            Toast makeText this   set theme   Toast LENGTH SHORT  show        setTheme R style beach     else if  themeName equals  Abstract            Toast makeText this   set theme   Toast LENGTH SHORT  show        setTheme R style abstract2     else if  themeName equals  Default          setTheme R style defaulttheme

User · Answer

This is what i have created for Material Design  May it will helpful you   Have a look for MultipleThemeMaterialDesign

User · Answer

i got the same problem but i found the solution   public class EditTextSmartPhoneActivity extends Activity implements DialogInterface OnClickListener       public final static int CREATE DIALOG    -1      public final static int THEME HOLO LIGHT    0      public final static int THEME BLACK    1       int position           Called when the activity is first created          Override     public void onCreate Bundle savedInstanceState                 position   getIntent   getIntExtra  position   -1            switch position                    case CREATE DIALOG              createDialog                break          case THEME HOLO LIGHT              setTheme android R style Theme Holo Light               break          case THEME BLACK              setTheme android R style Theme Black               break          default                     super onCreate savedInstanceState           setContentView R layout main               private void createDialog                     Options for user to select           String choose       Theme Holo Light   Theme Black             AlertDialog Builder b   new AlertDialog Builder this                Setting a title for the window            b setTitle  Choose your Application Theme                 Setting items to the alert dialog            b setSingleChoiceItems choose  0  null                Setting a positive button and its listener            b setPositiveButton  OK  this                Setting a positive button and its listener            b setNegativeButton  Cancel   null                Creating the alert dialog window using the builder class            AlertDialog d   b create                 show dialog           d show                Override     public void onClick DialogInterface dialog  int which               TODO Auto-generated method stub         AlertDialog alert    AlertDialog dialog          int position   alert getListView   getCheckedItemPosition             finish            Intent intent   new Intent this  EditTextSmartPhoneActivity class           intent putExtra  position   position           intent addFlags Intent FLAG ACTIVITY CLEAR TOP            intent addFlags Intent FLAG ACTIVITY NEW TASK           startActivity intent

User · Answer

This way work for me      Override protected void onCreate Bundle savedInstanceState        setTheme GApplication getInstance   getTheme         super onCreate savedInstanceState        setContentView R layout activity main       Then you want to change a new theme   GApplication getInstance   setTheme R style LightTheme   recreate

User · Answer

Instead of  getApplication   setTheme R style BlackTheme     use  setTheme R style BlackTheme     My code  in onCreate   method   super onCreate savedInstanceState    if someExpression        setTheme R style OneTheme     else       setTheme R style AnotherTheme      setContentView R layout activity some layout     Somewhere  for example  on a button click    YourActivity this recreate      You have to recreate activity  otherwise - change won t happen

User · Answer

I had a similar problem and I solved in this way     Override public void onCreate Bundle savedInstanceState         if  getIntent   hasExtra  bundle    amp  amp  savedInstanceState  null           savedInstanceState   getIntent   getExtras   getBundle  bundle                 add code for theme      switch theme            case LIGHT          setTheme R style LightTheme           break      case BLACK          setTheme R style BlackTheme           break       default            super onCreate savedInstanceState       setContentView R layout activity main         code      this code is for recreate the Activity saving Bundle and changing the theme  You have to write your own onSaveInstanceState Bundle outState   From API-11 you can use the method recreate   instead  Bundle temp bundle   new Bundle    onSaveInstanceState temp bundle   Intent intent   new Intent this  MainActivity class   intent putExtra  bundle   temp bundle   startActivity intent   finish

User · Answer

Call SetContentView Resource Layout Main  after setTheme

User · Answer

You can finish the Acivity and recreate it afterwards in this way your activity will be created again and all the views will be created with the new theme

User · Answer

If you want to change theme of an already existing activity  call recreate   after setTheme     Note  don t call recreate if you change theme in onCreate    to avoid infinite loop

User · Answer

recreate    as mentioned by TPReal  will only restart current activity  but the previous activities will still be in back stack and theme will not be applied to them   So  another solution for this problem is to recreate the task stack completely  like this       TaskStackBuilder create getActivity                 addNextIntent new Intent getActivity    MainActivity class                addNextIntent getActivity   getIntent                 startActivities      EDIT   Just put the code above after you perform changing of theme on the UI or somewhere else  All your activities should have method setTheme   called before onCreate    probably in some parent activity  It is also a normal approach to store the theme chosen in SharedPreferences  read it and then set using setTheme   method

[android] How to change current Theme at runtime in Android

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