How can I get a Dialog style activity window to fill the screen

Question

I am using an activity with the dialog theme set  and I want it to be full screen  I tried all sorts of things  even going through the WindowManager to expand the window to full width and height manually  but nothing works   Apparently  a dialog window  or an activity with the dialog theme  will only expand according to its contents  but even that doesn t always work  For instance  I show a progress bar circle which has width and height set to FILL PARENT  so does its layout container   but still  the dialog wraps around the much smaller progress bar instead of filling the screen   There must be a way of displaying something small inside a dialog window but have it expand to full screen size without its content resizing as well

User · Answer

This answer is a workaround for those who use  Theme AppCompat Dialog  or any other  Theme AppCompat Dialog  descendants like  Theme AppCompat Light Dialog    Theme AppCompat DayNight Dialog   etc  I myself has to use AppCompat dialog because i use AppCompatActivity as extends for all my activities  There will be a problem that make the dialog has padding on every sides top  right  bottom and left  if we use the accepted answer    Override public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState        setContentView R layout your layout        getWindow   setLayout ViewGroup LayoutParams MATCH PARENT  ViewGroup LayoutParams MATCH PARENT       On your Activity s style  add these code   lt style name  DialogActivityTheme  parent  Theme AppCompat Dialog  gt       lt item name  windowNoTitle  gt true lt  item gt       lt item name  android windowBackground  gt  null lt  item gt   lt  style gt    As you may notice  the problem that generate padding to our dialog is  android windowBackground   so here i make the window background to null

User · Answer

I just want to fill only 80  of the screen for that I did like this below          DisplayMetrics metrics   getResources   getDisplayMetrics            int screenWidth    int   metrics widthPixels   0 80            setContentView R layout mylayout            getWindow   setLayout screenWidth  LayoutParams WRAP CONTENT     set below the setContentview   it works only when I put the getwindow   setLayout    line below the setContentView      thanks  Matthias

User · Answer

You may add this values to your style android windowMinWidthMajor and android windowMinWidthMinor   lt style name  Theme Dialog  parent  android Theme Holo Dialog  gt               lt item name  android windowMinWidthMajor  gt 97  lt  item gt       lt item name  android windowMinWidthMinor  gt 97  lt  item gt   lt  style gt

User · Answer

For Dialog This may helpful for someone  I want a dialog to take full width of screen  searched a lot but nothing found useful  Finally this worked for me   mDialog setContentView R layout my custom dialog   mDialog getWindow   setBackgroundDrawable null     after adding this  my dialog appears in full width of screen

User · Answer

Set a minimum width at the top most layout    android minWidth  300dp    For example    lt  xml version  1 0  encoding  utf-8   gt   lt LinearLayout android orientation  vertical  android layout width  fill parent  android layout height  fill parent    xmlns android  http   schemas android com apk res android  android minWidth  300dp  gt    lt  -- Put remaining contents here -- gt    lt  LinearLayout gt

User · Answer

Wrap your dialog custom layout xml into RelativeLayout instead of any other layout That worked for me

User · Answer

In your manifest file where our activity is defined   lt activity         android name   YourPopUpActivity          android theme   android style Theme Holo Dialog   gt       lt  activity gt    without action bar   lt activity android name   YourPopUpActivity              android theme   android style Theme Holo Dialog NoActionBar   gt

User · Answer

I found the solution   In your activity which has the Theme Dialog style set  do this    Override public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState        setContentView R layout your layout        getWindow   setLayout ViewGroup LayoutParams MATCH PARENT  ViewGroup LayoutParams MATCH PARENT       It s important that you call Window setLayout   after you call setContentView    otherwise it won t work

User · Answer

Matthias  answer is mostly right but it s still not filling the entire screen as it has a small padding on each side  pointed out by  Holmes   In addition to his code  we could fix this by extending Theme Dialog style and add some attributes like this    lt style name  MyDialog  parent   android style Theme Dialog  gt       lt item name  android windowBackground  gt  android color transparent lt  item gt       lt item name  android windowNoTitle  gt true lt  item gt   lt  style gt    Then we simply declare Activity with theme set to MyDialog    lt activity     android name   FooActivity      android theme   style MyDialog    gt

User · Answer

This would be helpful for someone like me  Create custom dialog style    lt style name  MyDialog  parent  Theme AppCompat Light Dialog  gt       lt item name  windowNoTitle  gt true lt  item gt       lt item name  android windowFullscreen  gt true lt  item gt       lt item name  android windowIsFloating  gt false lt  item gt   lt  style gt    In AndroidManifest xml file set theme for wanted activity    lt activity         android name   CustomDialog                      android theme   style MyDialog   gt    That is all  no need to call methods programaticaly

[android] How can I get a Dialog style activity window to fill the screen?

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