How to make custom dialog with rounded corners in android

Question

What I am trying to do  I am trying to make a custom dialog in android With rounded corners   What is happening  I am able to make custom dialog but it doesn t have rounded corners  I tried adding a selector but still I couldn t achieve rounded corners   Below is my code for the same     Java code    private void launchDismissDlg              dialog   new Dialog getActivity    android R style Theme Dialog           dialog requestWindowFeature Window FEATURE NO TITLE           dialog setContentView R layout dlg dismiss           dialog setCanceledOnTouchOutside true            Button btnReopenId    Button  dialog findViewById R id btnReopenId           Button btnCancelId    Button  dialog findViewById R id btnCancelId            btnReopenId setOnClickListener new OnClickListener                  Override             public void onClick View v                                           btnCancelId setOnClickListener new OnClickListener                  Override             public void onClick View v                                         dialog setCanceledOnTouchOutside false           dialog getWindow   setSoftInputMode WindowManager LayoutParams SOFT INPUT STATE ALWAYS HIDDEN           dialog getWindow   setLayout LayoutParams MATCH PARENT LayoutParams WRAP CONTENT           dialog show             xml code    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   android color white      android orientation  vertical   gt        lt TableLayout         android layout width  match parent          android layout height  wrap content   gt            lt TableRow             android id    id tableRow1              android layout width  match parent              android layout height  wrap content              android layout marginTop  20dp              android gravity  center   gt                lt TextView                 android id    id textView1                  android layout width  wrap content                  android layout height  wrap content                  android gravity  center                  android text   amp quot I WOULD LIKE TO DISMISS THE VENDOR amp quot                   android textColor   color col dlg blue light                  android textSize  14sp                  android textStyle  bold    gt           lt  TableRow gt            lt TableRow             android id    id tableRow2              android layout width  match parent              android layout height  wrap content              android layout marginTop  5dp              android gravity  center   gt                lt TextView                 android id    id textView2                  android layout width  wrap content                  android layout height  wrap content                  android gravity  center                  android text  BECAUSE                  android textColor   android color black                  android textStyle  bold    gt           lt  TableRow gt              lt TableRow             android id    id tableRow4              android layout width  match parent              android layout height  wrap content   gt                lt Button                 android id    id btnReopenId                  android layout width  0dp                  android layout height  wrap content                  android layout weight  1                  android background   color col dlg green light                  android text  REOPEN                  android padding  5dp                  android textSize  14sp                  android textColor   android color white                  android textStyle  bold    gt                lt Button                 android id    id btnCancelId                  android layout width  0dp                  android layout height  wrap content                  android layout weight  1                  android background   color col dlg pink light                  android text  CANCEL                  android padding  5dp                  android textSize  14sp                  android textColor   android color white                  android textStyle  bold    gt           lt  TableRow gt       lt  TableLayout gt    lt  LinearLayout gt

User · Answer

simplest way is to use from

CardView and its card:cardCornerRadius

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView 
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:card="http://schemas.android.com/apk/res-auto"
 android:orientation="vertical"
 android:id="@+id/cardlist_item"
 android:layout_width="match_parent"
 android:layout_height="130dp"
 card:cardCornerRadius="40dp"
 android:layout_marginLeft="8dp"
 android:layout_marginRight="8dp"
 android:layout_marginTop="5dp"
 android:layout_marginBottom="5dp"
 android:background="@color/white">

  <RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="12sp"
    android:orientation="vertical"
    android:weightSum="1">
    </RelativeLayout>

</android.support.v7.widget.CardView>

And when you are creating your Dialog

dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));

User · Answer

Create a xml in drawable  say customd xml  then set it at background in your custom Dialog layout xml  android background  quot  drawable customd quot   finally in the java part for custom Dialog class you need to do this  public class Customdialoque extends DialogFragment    public View onCreateView  NonNull LayoutInflater inflater   Nullable ViewGroup container   Nullable Bundle savedInstanceState         getDialog   getWindow   setBackgroundDrawable new ColorDrawable Color TRANSPARENT         View view   inflater inflate R layout activity customdialoque  container  false        return view

User · Answer

Create a xml in drawable   say dialog bg xml   lt  xml version  1 0  encoding  utf-8   gt   lt shape xmlns android  http   schemas android com apk res android  gt       lt solid         android color   color white   gt       lt corners         android radius  30dp    gt       lt padding         android left  10dp          android top  10dp          android right  10dp          android bottom  10dp    gt   lt  shape gt    set it as the background in your layout xml  android background   drawable dialog bg    Set the background of the dialog s root view to transparent  because Android puts your dialog layout within a root view that hides the corners in your custom layout    dialog getWindow   setBackgroundDrawable new ColorDrawable Color TRANSPARENT

User · Answer

If you use Material Components   CustomDialog kt  class CustomDialog  DialogFragment          override fun getTheme     R style RoundedCornersDialog      styles xml   lt style name  RoundedCornersDialog  parent  Theme MaterialComponents Dialog  gt       lt item name  dialogCornerRadius  gt dimen lt  item gt   lt  style gt

User · Answer

With the Androidx library and Material Components Theme you can override the getTheme   method  import androidx fragment app DialogFragment  class RoundedDialog  DialogFragment          override fun getTheme     R style RoundedCornersDialog                 with   lt style name  quot RoundedCornersDialog quot  parent  quot  style Theme MaterialComponents Dialog quot  gt       lt item name  quot dialogCornerRadius quot  gt 16dp lt  item gt   lt  style gt   Or you can use the MaterialAlertDialogBuilder included in the Material Components Library  import androidx fragment app DialogFragment import com google android material dialog MaterialAlertDialogBuilder  class RoundedAlertDialog   DialogFragment                     override fun onCreateDialog savedInstanceState  Bundle    Dialog           return MaterialAlertDialogBuilder requireActivity    R style MaterialAlertDialog rounded                   setTitle  quot Test quot                    setMessage  quot Message quot                    setPositiveButton  quot OK quot   null                   create             with   lt style name  quot MaterialAlertDialog rounded quot  parent  quot  style ThemeOverlay MaterialComponents MaterialAlertDialog quot  gt       lt item name  quot shapeAppearanceOverlay quot  gt  style DialogCorners lt  item gt   lt  style gt    lt style name  quot DialogCorners quot  gt       lt item name  quot cornerFamily quot  gt rounded lt  item gt       lt item name  quot cornerSize quot  gt 16dp lt  item gt   lt  style gt    If you don t need a DialogFragment just use the MaterialAlertDialogBuilder

User · Answer

You can simply use MaterialAlertDialogBuilder to create custom dialog with rounded corners   First create a style for the material dialog like this     lt style name  MyRounded MaterialComponents MaterialAlertDialog  parent   style ThemeOverlay MaterialComponents MaterialAlertDialog  gt       lt item name  shapeAppearanceOverlay  gt  style ShapeAppearanceOverlay App CustomDialog Rounded      lt  item gt       lt item name  colorSurface  gt  color YOUR COLOR lt  item gt   lt  style gt    lt style name  ShapeAppearanceOverlay App CustomDialog Rounded  parent    gt       lt item name  cornerFamily  gt rounded lt  item gt       lt item name  cornerSize  gt 10dp lt  item gt   lt  style gt    then create a Alert Dialog object in Java class like this    AlertDialog alertDialog    new MaterialAlertDialogBuilder this R style MyRounded MaterialComponents MaterialAlertDialog      for fragment you can use getActivity   instead of this                       setView R layout custom layout     custom layout is here                       show                 final EditText editText   alertDialog findViewById R id custom layout text        access to text view of custom layout                      Button btn   alertDialog findViewById R id custom layout btn                btn setOnClickListener new View OnClickListener                      Override                 public void onClick View v                         Log d TAG   onClick      editText getText   toString                                         That s all you need to do

User · Answer

You need to do the following    Create a background with rounded corners for the Dialog s background    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 solid android color   fff    gt        lt corners         android bottomLeftRadius  8dp          android bottomRightRadius  8dp          android topLeftRadius  8dp          android topRightRadius  8dp    gt    lt  shape gt   Now in your Dialog s XML file in the root layout use that background with required margin   android layout marginLeft  20dip  android layout marginRight  20dip  android background   drawable dialog background   finally in the java part you need to do this   dialog requestWindowFeature Window FEATURE NO TITLE   dialog setContentView layoutResId   View v   getWindow   getDecorView    v setBackgroundResource android R color transparent      This works perfectly for me

User · Answer

For API level    28 available attribute android dialogCornerRadius   To support previous API versions need use   lt style name  RoundedDialog  parent  Theme AppCompat Light Dialog Alert  gt           lt item name  android windowBackground  gt  drawable dialog bg lt  item gt       lt  style gt    where dialog bg xml   lt  xml version  1 0  encoding  utf-8   gt   lt layer-list xmlns android  http   schemas android com apk res android  gt       lt item  gt           lt shape  gt               lt solid android color   android color transparent    gt           lt  shape gt       lt  item gt       lt item         android left  16dp          android right  16dp  gt           lt shape gt               lt solid                 android color   color white   gt               lt corners                 android radius  8dp    gt                lt padding                 android left  16dp                  android right  16dp    gt           lt  shape gt       lt  item gt   lt  layer-list gt

User · Answer

I implemented rounded dialog using CardView in the custom layout and setting its corner radius  Here s my xml code   lt  xml version  quot 1 0 quot  encoding  quot utf-8 quot   gt   lt androidx cardview widget CardView  xmlns android  quot http   schemas android com apk res android quot  xmlns app  quot http   schemas android com apk res-auto quot  android id  quot   id bottomSheet quot  android layout width  quot match parent quot  android layout margin  quot  dimen padding 5dp quot  app cardCornerRadius  quot  dimen dimen 20dp quot  android layout height  quot wrap content quot  gt    lt androidx constraintlayout widget ConstraintLayout     android layout width  quot match parent quot      android layout height  quot wrap content quot      android background  quot  drawable main gradient bg quot      android paddingBottom  quot 32dp quot  gt        lt TextView         android id  quot   id subdomain label quot          android layout width  quot wrap content quot          android layout height  quot wrap content quot          android layout marginStart  quot  dimen margin 32dp quot          android layout marginLeft  quot  dimen margin 32dp quot          android layout marginTop  quot  dimen margin 50dp quot          android fontFamily  quot  font nunito sans quot          android text  quot  string enter subdomain quot          android textColor  quot  color white quot          android textSize  quot  dimen size 18sp quot          app layout constraintLeft toLeftOf  quot parent quot          app layout constraintTop toTopOf  quot parent quot    gt         lt ImageView         android layout width  quot wrap content quot          android layout height  quot wrap content quot          android layout marginTop  quot  dimen dimen 45dp quot          app layout constraintLeft toRightOf  quot  id subdomain label quot          app layout constraintTop toTopOf  quot parent quot          app srcCompat  quot  drawable ic baseline info 24 quot    gt        lt EditText         android id  quot   id subdomain edit text bottom sheet quot          android layout width  quot match parent quot          android layout height  quot wrap content quot          android layout marginStart  quot  dimen dimen 20dp quot          android layout marginLeft  quot  dimen dimen 20dp quot          android layout marginEnd  quot  dimen dimen 20dp quot          android layout marginRight  quot  dimen dimen 20dp quot          android textColor  quot  color white quot          android theme  quot  style EditTextTheme quot          app layout constraintTop toBottomOf  quot  id subdomain label quot    gt        lt Button         android id  quot   id proceed btn quot          android layout width  quot  dimen dimen 150dp quot          android layout height  quot  dimen margin 50dp quot          android layout marginTop  quot  dimen margin 30dp quot          android background  quot  drawable primary btn bg quot          android text  quot  string proceed quot          android textAllCaps  quot false quot          android textColor  quot  color white quot          android textSize  quot  dimen size 18sp quot          app layout constraintLeft toLeftOf  quot parent quot          app layout constraintRight toRightOf  quot parent quot  app layout constraintTop toBottomOf  quot  id subdomain edit text bottom sheet quot    gt   lt  androidx constraintlayout widget ConstraintLayout gt   lt  androidx cardview widget CardView gt   After that  i called it in Kotlin as follows  -     val builder   AlertDialog Builder mContext      val viewGroup  ViewGroup   findViewById android R id content      val dialogView  View        LayoutInflater from mContext  inflate R layout subdomain bottom sheet       viewGroup  false      val alertDialog  AlertDialog   builder create       alertDialog setView dialogView 0 0 0 0      alertDialog show       val windowParam   WindowManager LayoutParams       windowParam copyFrom alertDialog window   attributes      windowParam width   AppConstant getDisplayMetricsWidth mContext  - 100     windowParam height   WindowManager LayoutParams WRAP CONTENT     windowParam gravity   Gravity CENTER     alertDialog window   attributes   windowParam              alertDialog window   setBackgroundDrawable      ColorDrawable Color TRANSPARENT    Where last line is very important  Missing that would cause a color mostly white  to show behind the corners

User · Answer

In Kotlin  I am using a class DoubleButtonDialog Java with line  window  setBackgroundDrawable ColorDrawable Color TRANSPARENT   as important one  class DoubleButtonDialog context  Context    Dialog context  R style DialogTheme         private var cancelableDialog  Boolean   true     private var titleDialog  String    null     private var messageDialog  String    null     private var leftButtonDialog  String    Yes            private var rightButtonDialog  String    null     private var onClickListenerDialog  OnClickListener    null      override fun onCreate savedInstanceState  Bundle             window  setBackgroundDrawable ColorDrawable Color TRANSPARENT             requestWindowFeature android view Window FEATURE NO TITLE          setCancelable cancelableDialog          setContentView R layout dialog double button            val btnNegative   findViewById lt Button gt  R id btnNegative            btnNegative visibility   View GONE           if  rightButtonDialog    null                  btnNegative visibility   View VISIBLE               btnNegative text   rightButtonDialog               btnNegative setOnClickListener                     dismiss                     onClickListenerDialog  onClickCancel                                       val btnPositive   findViewById lt Button gt  R id btnPositive          btnPositive text   leftButtonDialog         btnPositive setOnClickListener               onClickListenerDialog  onClick               dismiss                      findViewById lt TextView gt  R id title   text   titleDialog          findViewById lt TextView gt  R id message   text   messageDialog         super onCreate savedInstanceState             constructor          context  Context  cancelableDialog  Boolean  titleDialog  String           messageDialog  String  leftButtonDialog  String    rightButtonDialog  String             onClickListenerDialog  OnClickListener         this context            this cancelableDialog   cancelableDialog         this titleDialog   titleDialog         this messageDialog   messageDialog         this leftButtonDialog   leftButtonDialog           this rightButtonDialog   rightButtonDialog         this onClickListenerDialog   onClickListenerDialog           interface OnClickListener             fun onClickCancel       fun onClick       In layout  we can create a dialog double button xml       lt  xml version  1 0  encoding  utf-8   gt       lt LinearLayout xmlns android  http   schemas android com apk res android          xmlns tools  http   schemas android com tools          android layout width  fill parent          android layout height  wrap content          android layout gravity  center          android layout margin   dimen dimen 10          android background   drawable bg double button          android orientation  vertical          android padding   dimen dimen 5  gt            lt TextView             android id    id title              style   style TextViewStyle              android layout gravity  center horizontal              android layout margin   dimen dimen 10              android fontFamily   font campton semi bold              android textColor   color red dark4              android textSize   dimen text size 24              tools text   string dial    gt            lt TextView             android id    id message              style   style TextViewStyle              android layout gravity  center horizontal              android layout margin   dimen dimen 10              android gravity  center              android textColor   color semi gray 2              tools text   string diling police number    gt            lt LinearLayout             android layout width  match parent              android layout height  wrap content              android layout marginTop   dimen dimen 10              android gravity  center          android orientation  horizontal          android padding   dimen dimen 5  gt            lt  -- lt Button             android id    id btnNegative              style   style ButtonStyle              android layout width  0dp              android layout height   dimen dimen 40              android layout marginEnd   dimen dimen 10              android layout weight   4              android text   string cancel    gt -- gt            lt Button             android id    id btnPositive              style   style ButtonStyle              android layout width  wrap content              android layout height  wrap content              android backgroundTint   color red dark4              android fontFamily   font campton semi bold              android padding   dimen dimen 10              android text   string proceed              android textAllCaps  false              android textColor   color white              android textSize   dimen text size 20    gt       lt  LinearLayout gt   lt  LinearLayout gt    then use drawable xml as   lt  xml version  1 0  encoding  utf-8   gt   lt shape xmlns android  http   schemas android com apk res android  gt       lt solid         android color   color white   gt       lt corners         android radius   dimen dimen 10    gt       lt padding         android left   dimen dimen 10          android top   dimen dimen 10          android right   dimen dimen 10          android bottom   dimen dimen 10    gt   lt  shape gt

User · Answer

Setting   dialog getWindow   setBackgroundDrawable new ColorDrawable Color TRANSPARENT      will prevent dialog to cast a shadow   Solution is to use  dialog getWindow   setBackgroundDrawableResource R drawable dialog rounded background     where is R drawable dialog rounded background   lt  xml version  1 0  encoding  utf-8   gt   lt layer-list xmlns android  http   schemas android com apk res android   gt       lt item gt           lt shape android shape  rectangle  android padding  10dp  gt               lt solid                 android color   color dialog bg color   gt               lt corners                 android radius  30dp    gt           lt  shape gt       lt  item gt    lt  layer-list gt

User · Answer

You can use the shape for the background as-   lt shape xmlns android  http   schemas android com apk res android  android shape  rectangle  gt   lt solid android color   android color transparent   gt   lt corners android radius  10dp    gt   lt padding android left  10dp  android right  10dp   gt   lt  shape gt    Have a look on this for the details

User · Answer

dimen xml   lt  xml version  1 0  encoding  utf-8   gt   lt resources gt        lt integer name  weight  gt 1 lt  integer gt        lt dimen name  dialog top radius  gt 21dp lt  dimen gt        lt dimen name  textview dialog head min height  gt 50dp lt  dimen gt       lt dimen name  textview dialog drawable padding  gt 5dp lt  dimen gt        lt dimen name  button dialog layout margin  gt 3dp lt  dimen gt     lt  resources gt    styles xml   lt style name  TextView Dialog  gt           lt item name  android paddingLeft  gt  dimen dimen size lt  item gt           lt item name  android paddingRight  gt  dimen dimen size lt  item gt           lt item name  android gravity  gt center vertical lt  item gt           lt item name  android textColor  gt  color black lt  item gt       lt  style gt        lt style name  TextView Dialog Head  gt           lt item name  android minHeight  gt  dimen textview dialog head min height lt  item gt           lt item name  android textColor  gt  color white lt  item gt           lt item name  android background  gt  drawable dialog title style lt  item gt           lt item name  android drawablePadding  gt  dimen textview dialog drawable padding lt  item gt       lt  style gt        lt style name  TextView Dialog Text  gt           lt item name  android textAppearance  gt  style Font Medium 16 lt  item gt       lt  style gt        lt style name  Button  parent  Base Widget AppCompat Button  gt           lt item name  android layout height  gt  dimen button min height lt  item gt           lt item name  android layout width  gt match parent lt  item gt           lt item name  android textColor  gt  color white lt  item gt           lt item name  android gravity  gt center lt  item gt           lt item name  android textAppearance  gt  style Font Medium 20 lt  item gt       lt  style gt     lt style name  Button Dialog  gt           lt item name  android layout weight  gt  integer weight lt  item gt           lt item name  android layout margin  gt  dimen button dialog layout margin lt  item gt       lt  style gt        lt style name  Button Dialog Middle  gt           lt item name  android background  gt  drawable button primary selector lt  item gt       lt  style gt    dialog title style xml   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 gradient         android angle  270          android endColor   color primaryDark          android startColor   color primaryDark    gt        lt corners         android topLeftRadius   dimen dialog top radius          android topRightRadius   dimen dialog top radius    gt    lt  shape gt    dialog background xml   lt  xml version  1 0  encoding  utf-8   gt   lt shape xmlns android  http   schemas android com apk res android  gt       lt solid android color   color backgroundDialog    gt       lt corners         android topLeftRadius   dimen dialog top radius          android topRightRadius   dimen dialog top radius    gt       lt padding   gt   lt  shape gt    dialog one button 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  wrap content      android background   drawable dailog background      android orientation  vertical  gt        lt TextView         android id    id dialogOneButtonTitle          style   style TextView Dialog Head          android text  Process Completed    gt        lt LinearLayout         android layout width  match parent          android layout height  wrap content          android layout marginBottom  16dp          android layout marginLeft  16dp          android layout marginRight  16dp          android orientation  vertical  gt            lt TextView             android id    id dialogOneButtonText              style   style TextView Dialog Text              android text  Return the main menu    gt            lt LinearLayout             android layout width  match parent              android layout height  wrap content              android orientation  horizontal  gt                lt Button                 android id    id dialogOneButtonOkButton                  style   style Button Dialog Middle                  android text  Ok    gt            lt  LinearLayout gt        lt  LinearLayout gt    lt  LinearLayout gt    OneButtonDialog java  package com example sametoztoprak concept dialogs   import android app Dialog  import android graphics Color  import android graphics drawable ColorDrawable  import android os Bundle  import android support v7 app AppCompatActivity  import android view View  import android view Window  import android widget Button  import android widget TextView   import com example sametoztoprak concept R  import com example sametoztoprak concept models DialogFields          Created by sametoztoprak on 26 09 2017       public class OneButtonDialog extends Dialog implements View OnClickListener        private static OneButtonDialog oneButtonDialog      private static DialogFields dialogFields       private Button dialogOneButtonOkButton      private TextView dialogOneButtonText      private TextView dialogOneButtonTitle       public OneButtonDialog AppCompatActivity activity            super activity              public static OneButtonDialog getInstance AppCompatActivity activity  DialogFields dialogFields            OneButtonDialog dialogFields   dialogFields          return oneButtonDialog    oneButtonDialog    null    new OneButtonDialog activity    oneButtonDialog              Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           requestWindowFeature Window FEATURE NO TITLE           setContentView R layout dialog one button           getWindow   setBackgroundDrawable new ColorDrawable Color TRANSPARENT             dialogOneButtonTitle    TextView  findViewById R id dialogOneButtonTitle           dialogOneButtonText    TextView  findViewById R id dialogOneButtonText           dialogOneButtonOkButton    Button  findViewById R id dialogOneButtonOkButton            dialogOneButtonOkButton setOnClickListener this               Override     protected void onStart             super onStart            dialogOneButtonTitle setText dialogFields getTitle             dialogOneButtonText setText dialogFields getText             dialogOneButtonOkButton setText dialogFields getOneButton                 Override     public void onClick View v            switch  v getId                  case R id dialogOneButtonOkButton                   break              default                  break                    dismiss

User · Answer

For anyone who like do things in XML  specially in case where you are using Navigation architecture component actions in order to navigate to dialogs  You can use    lt style name  DialogStyle  parent  ThemeOverlay MaterialComponents Dialog Alert  gt        lt  -- dialog background is drawable shape with corner radius -- gt       lt item name  android background  gt  drawable dialog background lt  item gt        lt item name  android windowBackground  gt  android color transparent lt  item gt   lt  style gt

User · Answer

I made a new way without having a background drawable is that make it have CardView as parent and give it a app cardCornerRadius  20dp  and then add this in the java class dialog getWindow   setBackgroundDrawable new ColorDrawable Color TRANSPARENT     It s another way to make it

User · Answer

Here is the complete solution if you want to control the corner radius of the dialog and preserve elevation shadow   Dialog   class OptionsDialog  DialogFragment      override fun onCreateView inflater  LayoutInflater  container  ViewGroup  savedInstanceState  Bundle    View       dialog  window  setBackgroundDrawable ColorDrawable Color TRANSPARENT       return inflater inflate R layout dialog options  container         dialog options xml layout    lt FrameLayout xmlns android  http   schemas android com apk res android  xmlns app  http   schemas android com apk res-auto  android layout width  wrap content  android layout height  wrap content  gt    lt androidx cardview widget CardView     android layout width  wrap content      android layout height  wrap content      android layout margin  40dp      app cardElevation  20dp      app cardCornerRadius  12dp  gt        lt androidx constraintlayout widget ConstraintLayout         id    id actual content goes here          android layout width  wrap content          android layout height  wrap content  gt       lt  androidx constraintlayout widget ConstraintLayout gt    lt  androidx cardview widget CardView gt   lt  FrameLayout gt    The key is to wrap the CardView with another ViewGroup  here FrameLayout  and set margins to create space for the elevation shadow

User · Answer

dialog getWindow   setBackgroundDrawable new ColorDrawable Color TRANSPARENT     this works for me

[android] How to make custom dialog with rounded corners in android

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