How can I implement BottomSheetDialogFragment with fixed height

Question

I need to implement BottomSheetDialogFragment and face with the problem. I need that my BottomSheetDialogFragment has fixed height. Does anyone has an idea how to do it?

Here is my xml of fragment content

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="@dimen/bottom_sheet_height"
    android:background="@android:color/white"
    android:orientation="vertical">

    <TextView
        android:id="@+id/drag_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="24sp"
        android:textColor="#FF0000"
        android:text="Title"/>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:background="@android:color/white"
        android:layout_weight="1"/>

    <TextView
        android:id="@+id/ok_button"
        android:layout_width="match_parent"
        android:layout_height="54dp"
        android:background="@android:color/holo_blue_dark"
        android:gravity="center"
        android:text="Hello"
        android:textColor="@android:color/white"
        android:textSize="24sp"/>

</LinearLayout>

And in the setupDialog() I am doing this:

@Override
public void setupDialog(Dialog dialog, int style) {
    super.setupDialog(dialog, style);
    View contentView = View.inflate(getContext(), R.layout.bottom_sheet_dialog_content_view, null);
    dialog.setContentView(contentView);
    CoordinatorLayout.LayoutParams layoutParams = ((CoordinatorLayout.LayoutParams) ((View) contentView.getParent()).getLayoutParams());
    CoordinatorLayout.Behavior behavior = layoutParams.getBehavior();
    if (behavior != null && behavior instanceof BottomSheetBehavior) {
        ((BottomSheetBehavior) behavior).setBottomSheetCallback(bottomSheetCallback);
        ((BottomSheetBehavior) behavior).setPeekHeight(getResources().getDimensionPixelSize(R.dimen.bottom_sheet_height));
    }

    initRecyclerView(contentView);
}

And behavior is quite common:

private BottomSheetBehavior.BottomSheetCallback bottomSheetCallback = new BottomSheetBehavior.BottomSheetCallback() {
    @Override
    public void onStateChanged(@NonNull View bottomSheet, int newState) {
        if (newState == BottomSheetBehavior.STATE_HIDDEN) {
            dismiss();
        }
    }

    @Override
    public void onSlide(@NonNull View bottomSheet, float slideOffset) {
    }
};

---

UPD: Solved by set the fixed height to RecyclerView. Does anyone know the better approach?

Answer 1

You can directly give the fix height by Creating it style.

in 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="behavior_peekHeight">500dp</item>
</style>

Update :

BottomSheetDialog dialog = new BottomSheetDialog(this, R.style.BottomSheetDialog);
dialog.setContentView(R.layout.layout_bottom_sheet);
dialog.show();

Or Second Approch :

 CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) ((View) contentView.getParent()).getLayoutParams();
    CoordinatorLayout.Behavior behavior = params.getBehavior();

    if( behavior != null && behavior instanceof BottomSheetBehavior ) {
        ((BottomSheetBehavior) behavior).setBottomSheetCallback(mBottomSheetBehaviorCallback);
        ((BottomSheetBehavior) behavior).setPeekHeight(300);
    }