Android BottomSheetDialog 크기 조절하기

https://www.crocus.co.kr/1748?category=22652 

Android 빠르게 BottomSheetDialog 만들기

 

앞선 코드에서 BottomSheetDialog를 쉽게 만들 수 있다.

 

보통 BottomSheetDialog를 보면 이렇게 나타나는데 크기를 자유롭게 조절하는 방법을 기술해두고자 한다.

 

출처는 아래와 같다.

 

https://stackoverflow.com/questions/58651661/how-to-set-max-height-in-bottomsheetdialogfragment

How to set max height in BottomSheetDialogFragment?

 

 

package com.demo.testing;

import android.app.Activity;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import com.google.android.material.bottomsheet.BottomSheetBehavior;
import com.google.android.material.bottomsheet.BottomSheetDialog;
import com.google.android.material.bottomsheet.BottomSheetDialogFragment;

public class MyBottomSheetDialog extends BottomSheetDialogFragment {
    private View view;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.bottom_sheet_layout, container,  false);

        view.findViewById(R.id.close_btn).setOnClickListener(v -> dismiss());

        return view;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Dialog dialog = super.onCreateDialog(savedInstanceState);

        dialog.setOnShowListener(dialogInterface -> {
            BottomSheetDialog bottomSheetDialog = (BottomSheetDialog) dialogInterface;
            setupRatio(bottomSheetDialog);
        });
        return  dialog;
    }

    private void setupRatio(BottomSheetDialog bottomSheetDialog) {
        //id = com.google.android.material.R.id.design_bottom_sheet for Material Components
        //id = android.support.design.R.id.design_bottom_sheet for support librares
        FrameLayout bottomSheet = (FrameLayout)
                bottomSheetDialog.findViewById(R.id.design_bottom_sheet);
        BottomSheetBehavior behavior = BottomSheetBehavior.from(bottomSheet);
        ViewGroup.LayoutParams layoutParams = bottomSheet.getLayoutParams();
        layoutParams.height = getBottomSheetDialogDefaultHeight();
        bottomSheet.setLayoutParams(layoutParams);
        behavior.setState(BottomSheetBehavior.STATE_EXPANDED);
    }
    private int getBottomSheetDialogDefaultHeight() {
        return getWindowHeight() * 85 / 100;
    }
    private int getWindowHeight() {
        // Calculate window height for fullscreen use
        DisplayMetrics displayMetrics = new DisplayMetrics();
        ((Activity) getContext()).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
        return displayMetrics.heightPixels;
    }

}