'Custom FragmentDialog with round corners and not 100% screen width

I am creating a custom fragment dialog with round corners and with layout that would not fill the screen width (I would prefer if it just wrapped its content).

this is my rounded_dialog.xml in drawable folder, which is called by my Custom ThemeWithCorners as a background for the dialog. I also tried to set it as background to the linear layout which creates its content but nothing works.

<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" 
>
<solid android:color="@android:color/white"/>
<corners android:radius="20dp"
/>
</shape>

and this is how i call the dialog:

final String FTAG = "TAG_FRAGMENT_DIALOG_CALENDAR";
    dialog = (CalendarDialog) fm.findFragmentByTag(FTAG);
    ft = fm.beginTransaction();
    if (dialog != null)
    {
        ft.remove(dialog);
    }
    dialog = CalendarDialog.newInstance(this);      
    dialog.setCancelable(true);

    ft.add(dialog, FTAG);
    ft.show(dialog);
    ft.commit();

In onCreate method of the dialog I set the style and theme:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setStyle(DialogFragment.STYLE_NO_TITLE, R.style.ThemeWithCorners);      
}

This is the onCreateView method:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
getDialog().setCanceledOnTouchOutside(true);
v = (MyCalendar)inflater.inflate(R.layout.calendar_dialog, container, true)
    return v;
}

I also tried to add this to onCreateDialog method as other answers on SO suggested but did not work either:

@Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
    Dialog d =  super.onCreateDialog(savedInstanceState);
    LayoutParams lp=d.getWindow().getAttributes();
    d.getWindow().setBackgroundDrawable(new ColorDrawable(0));
    lp.width=-2;lp.height=-2;lp.gravity=Gravity.CENTER;
    lp.dimAmount=0;            
    lp.flags=LayoutParams.FLAG_LAYOUT_NO_LIMITS | LayoutParams.FLAG_NOT_TOUCH_MODAL;

    return d;
}

So to sum it up, I want round corners, not 100% width of the screen, it preferably should wrap its content. Please, please, I need some help, I am really desperate about this, I´v ebeen trying it for days!

Solution 1:^[1]

Dialog background: dialog_rounded_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="@android:color/white" />
    <corners android:radius="12dp" />
</shape>

Dialog layout: dialog_rounded.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/dialog_rounded_bg"
    android:minWidth="260dp"
    android:orientation="vertical"
    android:padding="24dp">
    ...
</LinearLayout>

Dialog fragment: RoundedDialog.java

public class RoundedDialog extends DialogFragment {
    ...
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                            Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.dialog_rounded, container, false);
        // Set transparent background and no title
        if (getDialog() != null && getDialog().getWindow() != null) {
            getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
            getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);
        }
        return view;
    }
    ...
}

Update: If you don't set the flag Window.FEATURE_NO_TITLE, a blue line appears on top of the dialog in devices with Android ? 4.4.

Solution 2:^[2]

Updated 2022 answer with Kotlin and View Binding -

class InternetLostDialog : DialogFragment() {

    private lateinit var binding: DialogInternetLostBinding

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        binding = DialogInternetLostBinding.inflate(LayoutInflater.from(context))
        val builder = AlertDialog.Builder(requireActivity())
        isCancelable = false
        builder.setView(binding.root)
        binding.root.setOnClickListener {
            requireActivity().finish()
        }
        val dialog = builder.create()
        dialog.window!!.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
        return dialog
    }

}

Solution 3:^[3]

Another way:
Use setStyle() in onCreate() method to apply a style to your DialogFragment.
Then, you can use android:background same as always in the root view of your_layout.xml file.

Steps:

style.xml file (in res folder) :

<style name="DialogTheme_transparent" parent="Theme.AppCompat.Dialog">
    <item name="android:windowBackground">@android:color/transparent</item>
    <!--You can set other style items also, such as animations and etc-->
</style>

Create your_layout.xml file in the layout folder:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="8dp"
    android:background="@drawable/bg_corner_dialog">
    ...
</LinearLayout>

Create bg_corner_dialog.xml file in the drawable folder:

<?xml version="1.0" encoding="utf-8"?>
<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle"
    android:dither="true">
    <solid android:color="#ffffff"/>
    <corners android:radius="16dp"/>
</shape>

Finally apply style and layout to the your DialogFragment:

public class CustomDialogFragment extends DialogFragment {
    ...

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setStyle(STYLE_NO_TITLE, R.style.DialogTheme_transparent);
        ...
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.your_layout, container, false);
        ButterKnife.bind(this, v);
        //init UI Elements...
        return v;
    }

}

I hope this helps you.
Best wishes

Solution 4:^[4]

An updated solution that works for me using Kotlin.

I set the background (rounded_dialog.xml) for the dialog like this:

    <?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners android:radius="28dp" />
    <solid android:color="@color/white"/>
</shape>

then calculating the screen width programmatically then subtract the Margin value from it, using this code snippet.

val displayMetrics = DisplayMetrics()
        requireActivity().windowManager.defaultDisplay.getMetrics(displayMetrics)
        val width = displayMetrics.widthPixels

then inside onStart callback I applied that width minus Margin. here is the full code.

@AndroidEntryPoint
class CancelDialogFragment : DialogFragment() {

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {

        if (dialog != null && dialog?.window != null) {
            dialog?.window?.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT));
            dialog?.window?.requestFeature(Window.FEATURE_NO_TITLE);
        }
        return inflater.inflate(R.layout.fragment_cancel_dialog, container, false)
    }

    override fun onStart() {
        super.onStart()
        val displayMetrics = DisplayMetrics()
        requireActivity().windowManager.defaultDisplay.getMetrics(displayMetrics)

        val width = displayMetrics.widthPixels
        val height = displayMetrics.heightPixels

        dialog?.window?.setLayout(width-64, ViewGroup.LayoutParams.WRAP_CONTENT)
    }


}

XML Layout fragment_cancel_dialog

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingVertical="32dp"
    android:padding="8dp"
    android:layout_marginHorizontal="8dp"
    android:background="@drawable/rounded_dialog"
    tools:context=".ui.orders.CancelDialogFragment">


    <TextView
        android:id="@+id/textView9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="Reason of cancellation"
        android:textSize="16sp"
        app:layout_constraintStart_toStartOf="@+id/firstNameTIL"
        app:layout_constraintTop_toTopOf="parent" />


    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/firstNameTIL"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginHorizontal="24dp"
        android:layout_marginTop="16dp"
        app:hintAnimationEnabled="false"
        app:hintEnabled="false"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView9">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/firstNameET"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/edit_text_bg"
            android:drawablePadding="12dp"
            android:inputType="textPersonName"
            android:paddingHorizontal="16dp"
            android:paddingVertical="16dp"
            android:textAlignment="viewStart"
            android:textColor="@color/textColor"
            android:textColorHint="@color/black" />
    </com.google.android.material.textfield.TextInputLayout>


    <Button
        android:id="@+id/signUpButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="16dp"
        android:layout_marginBottom="32dp"
        android:background="@drawable/button_bg"
        android:paddingHorizontal="56dp"
        android:text="@string/confirmStr"
        android:textAllCaps="false"
        android:inputType="text"
        android:textColor="@color/black"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/firstNameTIL" />


</androidx.constraintlayout.widget.ConstraintLayout>

Solution 5:^[5]

I think to make rounded corners, its much easier if u make cardview as the root of your layout and add below code in onCreateView(): alertDialog.getWindow().setBackgroundDrawableResource(android.R.color.transpare??nt)

Solution 6:^[6]

For Any One who wants to Use the AlertDialogBuilder and transparent the background and set the Drawable in XML file.

<style name="DialogStyle" parent="ThemeOverlay.MaterialComponents.Dialog.Alert">

<item name="android:background">@drawable/dialog_background</item>
<item name="android:windowBackground">@android:color/transparent</item>

Set this Theme on Builder like below

private val builder: AlertDialog.Builder = AlertDialog.Builder(context,R.style.DialogStyle)
    .setView(dialogView)

where is R.drawable.dialog_background

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
    <shape android:shape="rectangle" android:padding="10dp">
        <solid
            android:color="@color/dialog_bg_color"/>
        <corners
            android:radius="30dp" />
    </shape>
</item>

Solution 7:^[7]

There is a quick fix for DialogFragment. For example, in the method onCreateDialog() add style in AlertDialog.Builder(context, style):

@NonNull
@Override
public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
    View view = LayoutInflater.from(getActivity()).inflate(R.layout.custom_dialog_lauout, null);
    return new AlertDialog.Builder(getActivity(), R.style.custom_alert_dialog)
            .setView(view)
            .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int i) {
                    // do something
                }
            })
            .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            })
            .create();
}

In styles folder custom_alert_dialog

<style name="custom_alert_dialog" parent="Theme.AppCompat.Light.Dialog.Alert">
    <item name="android:windowBackground">@drawable/corner_background</item>
</style>

In drawable folder corner_background.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#FFFFFF" />
<corners android:radius="8dp" />

It's tested for API >= 21

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1
Solution 2
Solution 3	Ghasem Sadeghi
Solution 4	Mohamed AbdelraZek
Solution 5	Muhammed Ashraf
Solution 6	waheed shah
Solution 7

'Custom FragmentDialog with round corners and not 100% screen width

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]

Solution 6:[6]

Solution 7:[7]