Bottom Sheet Dialog from inside a fragment

Question

i'm currently trying to implement bottomSheetDialog inside my application. My main activity is composed by a viewpager, a top bar and a bottom navigation bar that i use to switch between fragments. In one of the fragment i'm trying to setup a modal button sheet dialog that have to appear on top of the Main Activity

    titleDemo = view.findViewById(R.id.title1);

    titleDemo.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            BottomSheetDialog bottomSheetDialog = new BottomSheetDialog(getContext());
            View parentView = getLayoutInflater().inflate(R.layout.dialog, null);
            bottomSheetDialog.setContentView(parentView);
            bottomSheetDialog.show();
        }
    });

When i click, the activity behave correctly, fading its colours but nothing shows. For my tests i used a simple layout with some random background color.

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/lightCyan">

</LinearLayout>

I feel that i'm messing with the views but i can't understand how to fix this.

Thanks

Answer 1

you need to add these lines

    app:behavior_hideable="true"
    app:behavior_peekHeight="120dp"
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior"

in your LinearLayout