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 c

Answer 1

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:

<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">

<androidx.cardview.widget.CardView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="40dp"
    app:cardElevation="20dp"
    app:cardCornerRadius="12dp">

    <androidx.constraintlayout.widget.ConstraintLayout
        id="@+id/actual_content_goes_here"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.cardview.widget.CardView>
</FrameLayout>

The key is to wrap the CardView with another ViewGroup (here FrameLayout) and set margins to create space for the elevation shadow.

Answer 2

I implemented rounded dialog using CardView in the custom layout and setting its corner radius.

Here's my xml code.

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/bottomSheet"
android:layout_width="match_parent"
android:layout_margin="@dimen/padding_5dp"
app:cardCornerRadius="@dimen/dimen_20dp"
android:layout_height="wrap_content">

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/main_gradient_bg"
    android:paddingBottom="32dp">

    <TextView
        android:id="@+id/subdomain_label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/margin_32dp"
        android:layout_marginLeft="@dimen/margin_32dp"
        android:layout_marginTop="@dimen/margin_50dp"
        android:fontFamily="@font/nunito_sans"
        android:text="@string/enter_subdomain"
        android:textColor="@color/white"
        android:textSize="@dimen/size_18sp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/dimen_45dp"
        app:layout_constraintLeft_toRightOf="@id/subdomain_label"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/ic_baseline_info_24" />

    <EditText
        android:id="@+id/subdomain_edit_text_bottom_sheet"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/dimen_20dp"
        android:layout_marginLeft="@dimen/dimen_20dp"
        android:layout_marginEnd="@dimen/dimen_20dp"
        android:layout_marginRight="@dimen/dimen_20dp"
        android:textColor="@color/white"
        android:theme="@style/EditTextTheme"
        app:layout_constraintTop_toBottomOf="@id/subdomain_label" />

    <Button
        android:id="@+id/proceed_btn"
        android:layout_width="@dimen/dimen_150dp"
        android:layout_height="@dimen/margin_50dp"
        android:layout_marginTop="@dimen/margin_30dp"
        android:background="@drawable/primary_btn_bg"
        android:text="@string/proceed"
        android:textAllCaps="false"
        android:textColor="@color/white"
        android:textSize="@dimen/size_18sp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/subdomain_edit_text_bottom_sheet" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>

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.

Answer 3

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

this works for me

Answer 4

You need to do the following:

• Create a background with rounded corners for the Dialog's background:

  <?xml version="1.0" encoding="utf-8"?>
  <shape xmlns:android="http://schemas.android.com/apk/res/android"
  android:shape="rectangle" >
  
      <solid android:color="#fff" />
  
      <corners
          android:bottomLeftRadius="8dp"
          android:bottomRightRadius="8dp"
          android:topLeftRadius="8dp"
          android:topRightRadius="8dp" />
  
  </shape>
  

• 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.