How To Settheme To An Activity At Runtime? It Doesn't Work Call Settheme Before Oncreate And Setcontentview

I want setTheme to an activity at runtime, I have search some solutions by google. someone said call setTheme before onCreate and setContentView can works, the code section like pu

Solution 1:

Just try this - set your theme after super.onCreate(savedInstanceState); and before setContentView(...)

Like below code -

public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setTheme(android.R.style.Theme_Translucent_NoTitleBar); // Set heresetContentView(...)
}

Solution 2:

Actually this only worked for me if I set it before calling super.onCreate(savedInstanceState);

publicvoidonCreate(Bundle savedInstanceState)
{
    finalintthemeRes= getIntent().getIntExtra(EXTRA_THEME_ID, 0);
    if (themeRes != 0) setTheme(themeRes);
    super.onCreate(savedInstanceState);
    //ect...
}

Solution 3:

setContentView(...);
setTheme(R.style.MyTheme);
setContentView(...);

It must work well..

More on Themes, Read this http://entertheinfinity.blogspot.in/2016/06/designing-android-interface-themes.html

Solution 4:

To set the theme at runtime and fix the "black background" problem:

1. the theme should be set before onCreate().

   public void onCreate(Bundle savedInstanceState) {
       setTheme(android.R.style.Theme_Translucent_NoTitleBar);
       super.onCreate(savedInstanceState);
       ...
       setContentView(...)
   }
   

2. the theme of the transparent activity in the android manifest should be set to any theme that has a transparent background (e.g. a dialog theme).

   • this tells the Android OS continue to draw the activities behind the transparent activity so that you don't end up with a black background.

   • i'm using an AppCompatActivity; i need to use an AppCompat theme:

     <?xml version="1.0" encoding="utf-8"?><manifestxmlns:android="http://schemas.android.com/apk/res/android"package="com.example.app">
         ...
         <application...>
             ...
             <activityandroid:name=".TranslucentActivity"android:theme="@style/Theme.AppCompat.DayNight.Dialog".../>
             ...
         </application></manifest>