How do I create a transparent Activity on Android

Question

I want to create a transparent Activity on top of another activity   How can I achieve this

User · Answer

It goes like this    lt activity android name   usual activity Declaration  android theme   android style Theme Translucent NoTitleBar    gt

User · Answer

Assign the translucent theme to the activity that you want to make transparent in the Android manifest file of your project    lt activity     android name  YOUR COMPLETE ACTIVITY NAME WITH PACKAGE      android theme   android style Theme Translucent NoTitleBar    gt

User · Answer

In the onCreate function  below the setContentView  add this line   getWindow   setBackgroundDrawable new ColorDrawable Color TRANSPARENT

User · Answer

Add the following style in your res values styles xml file  if you don   t have one  create it   Here   s a complete file    lt  xml version  1 0  encoding  utf-8   gt   lt resources gt     lt style name  Theme Transparent  parent  android Theme  gt       lt item name  android windowIsTranslucent  gt true lt  item gt       lt item name  android windowBackground  gt  android color transparent lt  item gt       lt item name  android windowContentOverlay  gt  null lt  item gt       lt item name  android windowNoTitle  gt true lt  item gt       lt item name  android windowIsFloating  gt true lt  item gt       lt item name  android backgroundDimEnabled  gt false lt  item gt     lt  style gt   lt  resources gt     The value  color transparent is the color value  00000000 which I put in the res values color xml file  You can also use  android color transparent in later Android versions    Then apply the style to your activity  for example    lt activity android name   SampleActivity  android theme   style Theme Transparent  gt       lt  activity gt

User · Answer

Along with the gnobal s above solution  I had to set alpha to 0 in the layout file of that particular activity  because on certain phone  Redmi Narzo 20 pro running on Android 10  a dialog portion of the screen was showing with the screen that was supposed to be transparent  For some reason the windowIsFloating was causing this issue  but on removing it I wasn t getting the desired output  Steps   Add the following in the style xml located under res  gt  values  gt  styles xml   lt style name  quot Theme Transparent quot  parent  quot android Theme quot  gt      lt item name  quot android windowIsTranslucent quot  gt true lt  item gt      lt item name  quot android windowBackground quot  gt  android color transparent lt  item gt      lt item name  quot android windowContentOverlay quot  gt  null lt  item gt      lt item name  quot android windowNoTitle quot  gt true lt  item gt      lt item name  quot android windowIsFloating quot  gt true lt  item gt      lt item name  quot android backgroundDimEnabled quot  gt false lt  item gt      lt item name  quot android colorBackgroundCacheHint quot  gt  null lt  item gt    lt  style gt      Set the theme of the activity with the above style in AndroidManifest xml  lt activity       android name  quot  activityName quot        android theme  quot  style Theme Transparent quot   gt       Open your layout file of the activity on which you applied the above style and set it s alpha value to 0  android alpha  quot 0 quot   for the parent layout element   lt  xml version  quot 1 0 quot  encoding  quot utf-8 quot   gt   lt androidx constraintlayout widget ConstraintLayout      xmlns android  quot http   schemas android com apk res android quot      xmlns tools  quot http   schemas android com tools quot      android layout width  quot match parent quot      android layout height  quot match parent quot      android alpha  quot 0 quot  gt      lt WebView                 android layout width  quot match parent quot          android layout height  quot match parent quot          android alpha  quot 0 quot   gt    lt  androidx constraintlayout widget ConstraintLayout gt      Please Note  You ll have to extend you activity using Activity   class and not AppCompatActivity for using the above solution

User · Answer

All those answers might be confusing  there is a difference between Transparent activity and None UI activity   Using this   android theme   android style Theme Translucent NoTitleBar   Will make the activity transparent but will block the UI   If you want a None UI activity than use this   android theme   android style Theme NoDisplay

User · Answer

If you are using AppCompatActivity then add this in styles xml   lt style name  TransparentCompat  parent   style Theme AppCompat Light DarkActionBar  gt       lt item name  android windowNoTitle  gt true lt  item gt       lt item name  android windowBackground  gt  android color transparent lt  item gt       lt item name  android colorBackgroundCacheHint  gt  null lt  item gt       lt item name  android windowIsTranslucent  gt true lt  item gt       lt item name  android windowAnimationStyle  gt  android style Animation lt  item gt   lt  style gt    In manifest file you can add this theme to activity tag like this  android theme   style TransparentCompat    for more details read this article

User · Answer

Just let the activity background image be transparent  Or add the theme in the XML file    lt activity android name   usual activity Declaration  android theme   android style Theme Translucent NoTitleBar    gt

User · Answer

In my case  i have to set the theme on the runtime in java based on some conditions  So I created one theme in style  similar to other answers     lt  xml version  1 0  encoding  utf-8   gt   lt resources gt     lt style name  Theme Transparent  parent  android Theme  gt       lt item name  android windowIsTranslucent  gt true lt  item gt       lt item name  android windowBackground  gt  android color transparent lt  item gt       lt item name  android windowContentOverlay  gt  null lt  item gt       lt item name  android windowNoTitle  gt true lt  item gt       lt item name  android windowIsFloating  gt true lt  item gt       lt item name  android backgroundDimEnabled  gt false lt  item gt     lt  style gt   lt  resources gt    Then in Java I applied it to my activity    Override protected void onCreate Bundle savedInstanceState         String email   getIntent   getStringExtra AppConstants REGISTER EMAIL INTENT KEY       if  email    null  amp  amp   email isEmpty                 We have the valid email ID  no need to take it from user             prepare transparent activity just to perform bg tasks required for login         setTheme R style Theme Transparent           super onCreate savedInstanceState           setContentView R layout activity login          else         super onCreate savedInstanceState            setContentView R layout activity dummy       Remember one Important point here  You must call the setTheme   function before super onCreate savedInstanceState    I missed this point and stucked for 2 hours  thinking why my theme is not reflected at run time

User · Answer

There re two ways    Using Theme NoDisplay Using Theme Translucent NoTitleBar   Using Theme NoDisplay will still work    but only on older Android devices  On Android 6 0 and higher  using Theme NoDisplay without calling finish   in onCreate    or  technically  before onResume    will crash your app  This is why the recommendation is to use Theme Translucent NoTitleBar  which does not suffer from this limitation

User · Answer

For dialog activity I use this   getWindow   getDecorView   setBackgroundResource android R color transparent     But you also need to set your main View in the activity to invisible  Otherwise the background will be invisible while all views in it will be visible

User · Answer

Note 1 In Drawable folder create test xml and copy the following code      lt  xml version  1 0  encoding  UTF-8   gt   lt shape xmlns android  http   schemas android com apk res android      android shape  rectangle   gt        lt stroke android width  2dp    gt        lt gradient         android angle  90          android endColor   29000000          android startColor   29000000    gt        lt corners         android bottomLeftRadius  7dp          android bottomRightRadius  7dp          android topLeftRadius  7dp          android topRightRadius  7dp    gt    lt  shape gt        Note  Corners and shape is as per your requirement       Note 2 Create xml        lt  xml version  1 0  encoding  utf-8   gt       lt LinearLayout xmlns android  http   schemas android com apk res android          android layout width  match parent          android layout height  match parent          android background   drawable test          android orientation  vertical   gt            lt LinearLayout             android layout width  fill parent              android layout height  wrap content              android layout weight  1 09              android gravity  center           android background   drawable transperent shape              android orientation  vertical   gt        lt  LinearLayout gt       lt  LinearLayout gt

User · Answer

in addition to the above answers   to avoid android Oreo related crash on activity   lt style name  AppTheme Transparent  parent   style Theme AppCompat Dialog  gt       lt item name  windowNoTitle  gt true lt  item gt       lt item name  android windowCloseOnTouchOutside  gt false lt  item gt   lt  style gt    lt activity      android name  xActivity       android theme   style AppTheme Transparent    gt

User · Answer

You can remove setContentView R layout mLayout  from your activity and set theme as android theme   style AppTheme Transparent   Check this link for more details

User · Answer

I wanted to add to this a little bit as I am a new Android developer as well  The accepted answer is great  but I did run into some trouble  I wasn t sure how to add in the color to the colors xml file  Here is how it should be done  colors xml  lt  xml version  quot 1 0 quot  encoding  quot utf-8 quot   gt   lt resources gt        lt color name  quot class zero background quot  gt  7f040000 lt  color gt        lt color name  quot transparent quot  gt  00000000 lt  color gt   lt  resources gt   In my original colors xml file I had the tag  quot drawable quot    lt drawable name  quot class zero background quot  gt  7f040000 lt  drawable gt   And so I did that for the color as well  but I didn t understand that the  quot  color  quot  reference meant look for the tag  quot color quot  in the XML  I thought that I should mention this as well to help anyone else out

User · Answer

In the styles xml    lt style name  Theme AppCompat Translucent  parent  Theme AppCompat NoActionBar  gt       lt item name  android background  gt  33000000 lt  item gt   lt  -- Or any transparency or color you need -- gt       lt item name  android windowNoTitle  gt true lt  item gt       lt item name  android windowBackground  gt  android color transparent lt  item gt       lt item name  android colorBackgroundCacheHint  gt  null lt  item gt       lt item name  android windowIsTranslucent  gt true lt  item gt       lt item name  android windowAnimationStyle  gt  android style Animation lt  item gt   lt  style gt    In the AndroidManifest xml    lt activity     android name   WhateverNameOfTheActivityIs      android theme   style Theme AppCompat Translucent  gt           lt  activity gt

User · Answer

Declare your activity in the manifest like this     lt activity         android name   yourActivity           android theme   android style Theme Translucent NoTitleBar Fullscreen   gt    And add a transparent background to your layout

User · Answer

Assign it the Translucent theme  android theme   android style Theme Translucent NoTitleBar

User · Answer

I just did two things  and it made my activity transparent  They are below    In the manifest file I just added the below code in the activity tag   android theme   android style Theme Translucent NoTitleBar Fullscreen   And I just set the background of the main layout for that activity as   80000000   Like  android background   80000000     It perfectly works for me

User · Answer

I achieved it on 2 3 3 by just adding android theme   android style Theme Translucent  in the activity tag in the manifest   I don t know about lower versions

User · Answer

Just add the following line to the activity tag in your manifest file that needs to look transparent   android theme   android style Theme Translucent

User · Answer

The easiest way that I have found is to set the activity s theme in the AndroidManifest to android theme   android style Theme Holo Dialog     Then in the activity s onCreate method  call getWindow   setBackgroundDrawable new ColorDrawable 0

[android] How do I create a transparent Activity on Android?

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