Round corner for BottomSheetDialogFragment

Question

i have an custom BttomSheetDialogFragment and i want to have round corners in top of Bottom View

this is my Custom class that inflating my layout that i want to appear from bottom

View mView;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    mView = inflater.inflate(R.layout.charge_layout, container, false);
    initChargeLayoutViews();
    return mView;
}

and also i have this xml resource file as background :

<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle"
>
<corners android:topRightRadius="35dp"
    android:topLeftRadius="35dp"
    />
<solid android:color="@color/white"/>

<padding android:top="10dp"
    android:bottom="10dp"
    android:right="16dp"
    android:left="16dp"/>

but the problem is, when i set this resource file as background of my Layout's root element , the corners still are not rounded

and i can't use below code :

    this.getDialog().getWindow().setBackgroundDrawableResource(R.drawable.charge_layout_background);

cuz its override default background of BottomSheetDialog and there wont be any semi-transparent gray color above my Bottom View

Answer 1

1. Create a shape drawable .. which we will use as background for bottom sheet . Provide the appropriate value for radius of top left and right corner .

   <?xml version="1.0" encoding="utf-8"?>
   <shape xmlns:android="http://schemas.android.com/apk/res/android"
       android:shape="rectangle">
       <corners
           android:topLeftRadius="24dp"
           android:topRightRadius="24dp" />
       <padding android:top="2dp" />
       <solid android:color="@color/white" />
   </shape>
   

2. Now create style for " Bottom sheet dialog fragment "

   <style name="BottomSheet" parent="@style/Widget.Design.BottomSheet.Modal">
           <item name="android:background">@drawable/drawable_bottomsheet_background</item>
       </style>
   
       <style name="BaseBottomSheetDialog" parent="@style/Theme.Design.Light.BottomSheetDialog">
           <item name="android:windowIsFloating">false</item>
           <item name="bottomSheetStyle">@style/BottomSheet</item>
       </style>
   
       <style name="BottomSheetDialogTheme" parent="BaseBottomSheetDialog" />
   

3. Now create a custom class that will extend BottomSheetDilogFragment ,where you provide your style .

   open class CustomRoundBottomSheet : BottomSheetDialogFragment() {
   
       override fun getTheme(): Int = R.style.BottomSheetDialogTheme
   
       override fun onCreateDialog(savedInstanceState: Bundle?): Dialog = BottomSheetDialog(requireContext(), theme)
   
   }
   

4. Now use this class wherever you want to have round corner bottom sheet . eg

   class BottomSheetSuccess : CustomRoundBottomSheet() {
   
       override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
           return inflater.inflate(R.layout.bottomsheet_shopcreate_success, container, false)
       }
   
   
       override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
           super.onViewCreated(view, savedInstanceState)
       }
   
   } 
   

Answer 2

The BottomSheetDialog is setting a default white background color , this is why the corners are not visible, In order to show them you need to make the background of the dialog transparent by overriding the style of the BottomSheetDialog.

Define this style In your res/values/styles/styles.xml

<style name="BottomSheetDialog" parent="Theme.Design.Light.BottomSheetDialog">
    <item name="bottomSheetStyle">@style/bottomSheetStyleWrapper</item>
</style>

<style name="bottomSheetStyleWrapper" parent="Widget.Design.BottomSheet.Modal">
    <item name="android:background">@android:color/transparent</item>
</style>

And set this style to your BottomSheetDialog

View view = getLayoutInflater().inflate(R.layout.chooser_bottom_sheet, null);
BottomSheetDialog dialog = new BottomSheetDialog(this,R.style.BottomSheetDialog); // Style here
dialog.setContentView(view);
dialog.show();

Answer 3

Create a custom drawable with rounded corner and set it as background of your BottomSheetDialogFragment's layout root

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">

<solid android:color="@color/colorPrimary" />

<corners
    android:bottomLeftRadius="0dp"
    android:bottomRightRadius="0dp"
    android:topLeftRadius="12dp"
    android:topRightRadius="12dp" />

</shape>

And then simply add the below code to your BottomSheetDialogFragment class

@Override
public void setupDialog(Dialog dialog, int style) {
    super.setupDialog(dialog, style);
    View contentView = View.inflate(getContext(), 
R.layout.fragment_bottom_sheet, null);
    dialog.setContentView(contentView);

    CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) ((View) contentView.getParent())
            .getLayoutParams();
    CoordinatorLayout.Behavior behavior = params.getBehavior();
    ((View) contentView.getParent()).setBackgroundColor(ContextCompat.getColor(getContext(), android.R.color.transparent));
}

You can even play with the params to set margin like below

params.setMargins(50, 0, 50, 0);

Answer 4

With the new Material Component library you can customize the shape of your component using the shapeAppearanceOverlay attribute in your style.

Just use the BottomSheetDialogFragment overriding the onCreateView method and then define your custom style for Bottom Sheet Dialogs.

Define the bottomSheetDialogTheme attribute in styles.xml in your app theme:

  <!-- Base application theme. -->
  <style name="AppTheme" parent="Theme.MaterialComponents.Light">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    ....
    <item name="bottomSheetDialogTheme">@style/CustomBottomSheetDialog</item>
  </style>

Then just define your favorite shape with shapeAppearanceOverlay

  <style name="CustomBottomSheetDialog" parent="@style/ThemeOverlay.MaterialComponents.BottomSheetDialog">
    <item name="bottomSheetStyle">@style/CustomBottomSheet</item>
  </style>

  <style name="CustomBottomSheet" parent="Widget.MaterialComponents.BottomSheet">
    <item name="shapeAppearanceOverlay">@style/CustomShapeAppearanceBottomSheetDialog</item>
  </style>

  <style name="CustomShapeAppearanceBottomSheetDialog" parent="">
    <item name="cornerFamily">rounded</item>
    <item name="cornerSizeTopRight">16dp</item>
    <item name="cornerSizeTopLeft">16dp</item>
    <item name="cornerSizeBottomRight">0dp</item>
    <item name="cornerSizeBottomLeft">0dp</item>
  </style>

It requires the version 1.1.0 (currently the latest version is 1.1.0-beta02).

Answer 5

If you use the last version of material component you just have to override ShapeAppearance.MaterialComponents.LargeComponent (as the bottom sheet use this shape) and set the value you want like :

 <style name="ShapeAppearance.YourApp.LargeComponent" parent="ShapeAppearance.MaterialComponents.LargeComponent">
        <item name="cornerFamily">rounded</item>
        <item name="cornerSize">12dp</item>
 </style>

And then set in your app style :

<item name="shapeAppearanceLargeComponent">@style/ShapeAppearance.YourApp.LargeComponent</item>

The solution of Gabriele Mariotti is similar and works too but this one is simpler.

Answer 6

I was checking the same thing today and yes you were right about following code

this.getDialog().getWindow().setBackgroundDrawableResource(R.drawable.charge_layout_background);

this applies to fragment background, so instead you should get the bottomsheet view from dialog window and change the background here is the code

 @SuppressLint("RestrictedApi")
    @Override
    public void setupDialog(Dialog dialog, int style) {
        super.setupDialog(dialog, style);
        View rootView = getActivity().getLayoutInflater().inflate(R.layout.view_member_info,null,false);
        unbinder = ButterKnife.bind(this, rootView);
        adjustUIComponents();
        dialog.setContentView(rootView);
        FrameLayout bottomSheet = (FrameLayout) dialog.getWindow().findViewById(android.support.design.R.id.design_bottom_sheet);
        bottomSheet.setBackgroundResource(R.drawable.container_background);
    }

here bottomsheet is the actual view you want to change.