Keyboard hides BottomSheetDialogFragment

I tried all of answers in this topic but nothing helped. I looked through many sites and found only one solution that working for me.

 override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
    val dialog = super.onCreateDialog(savedInstanceState)

    dialog.window?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE)
    dialog.setOnShowListener {
        Handler().post {
            val bottomSheet = (dialog as? BottomSheetDialog)?.findViewById<View>(R.id.design_bottom_sheet) as? FrameLayout
            bottomSheet?.let {
                BottomSheetBehavior.from(it).state = BottomSheetBehavior.STATE_EXPANDED
            }
        }
    }

    return dialog
}

Original solution

You can use the next class:

import android.graphics.Rect; 
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.BottomSheetBehavior;
import android.support.design.widget.BottomSheetDialog;
import android.support.design.widget.BottomSheetDialogFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;

public class TestBottomSheetDialog extends BottomSheetDialogFragment {

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View fragmentView = LayoutInflater.from(getContext()).inflate(R.layout.fragment_bottom_sheet, container, false);
        if (getDialog().getWindow() != null) {
           getDialog().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
        }
        if (getActivity() != null) {
            View decorView = getActivity().getWindow().getDecorView();
            decorView.getViewTreeObserver().addOnGlobalLayoutListener(() -> {
                Rect displayFrame = new Rect();
                decorView.getWindowVisibleDisplayFrame(displayFrame);
                int height = decorView.getContext().getResources().getDisplayMetrics().heightPixels;
                int heightDifference = height - displayFrame.bottom;
                if (heightDifference != 0) {
                    if (fragmentView.getPaddingBottom() != heightDifference) {
                        fragmentView.setPadding(0, 0, 0, heightDifference);
                    }
                } else {
                    if (fragmentView.getPaddingBottom() != 0) {
                        fragmentView.setPadding(0, 0, 0, 0);
                    }
                }
            });
        }
        getDialog().setOnShowListener(dialog -> {
            BottomSheetDialog d = (BottomSheetDialog) dialog;
            View bottomSheetInternal = d.findViewById(android.support.design.R.id.design_bottom_sheet);
            if (bottomSheetInternal == null) return;
             BottomSheetBehavior.from(bottomSheetInternal).setState(BottomSheetBehavior.STATE_EXPANDED);
        });
        return fragmentView;
    }
}

I found the solution for 27 api. So the reason why keyboard hides view even with SOFT_INPUT_ADJUST_RESIZE is that the windowIsFloating is set for Dialogs.

The most convenient way that I found to change this is by creating style:

<style name="DialogStyle" parent="Theme.Design.Light.BottomSheetDialog">
    <item name="android:windowIsFloating">false</item>
    <item name="android:statusBarColor">@android:color/transparent</item>
    <item name="android:windowSoftInputMode">adjustResize</item>
</style>

And set this in onCreate method of your BottomSheetDialogFragment:

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setStyle(DialogFragment.STYLE_NORMAL, R.style.DialogStyle)
}

This is how it looks on my device: