【Android】BottomSheetDialogの実装方法メモ

こんな感じで実装出来た！

ButtonSheetDialog

開発環境

Android Studio = 3.5.3
compileSdkVersion = 29
targetSdkVersion = 29
minSdkVersion = 21
サポート ライブラリ = Androidx Lang = Java

ソース

openDialogメソッドに書いてあります。
ボタンとかレイアウトは適当です。

package com.hiropon.test;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {

    private BottomSheetDialog dialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button btnPlayer1 = findViewById(R.id.Button1);
        btnPlayer1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                openDialog();
            }
        });

        Button btnPlayer2 = findViewById(R.id.Button2);
        btnPlayer2.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                openDialog();
            }
        });
    }

    private void openDialog() {
        View view = getLayoutInflater().inflate(R.layout.layout_bottom_sheet, null);
        dialog = new BottomSheetDialog(this);
        dialog.setContentView(view);
        ImageButton btn1 = (ImageButton) view.findViewById(R.id.btn1);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(v.getContext(),"ImageButton1が押されました",Toast.LENGTH_SHORT).show();
                dialog.dismiss();
            }
        });
        ImageButton btn2 = (ImageButton) view.findViewById(R.id.btn2);
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(v.getContext(),"ImageButton2が押されました",Toast.LENGTH_SHORT).show();
                dialog.dismiss();
            }
        });
        ImageButton btn3 = (ImageButton) view.findViewById(R.id.btn3);
        btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(v.getContext(),"ImageButton3が押されました",Toast.LENGTH_SHORT).show();
                dialog.dismiss();
            }
        });
        dialog.show();
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/Button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.306"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.498" />

    <Button
        android:id="@+id/Button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.709"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.498" />

</androidx.constraintlayout.widget.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"

    android:orientation="horizontal"
    android:background="#ffffff">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical">

        <ImageButton
            android:id="@+id/btn1"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:background="@mipmap/ic_launcher" />
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Button1"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical">

        <ImageButton
            android:id="@+id/btn2"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:background="@mipmap/ic_launcher" />
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Button2"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical">

        <ImageButton
            android:id="@+id/btn3"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:background="@mipmap/ic_launcher" />
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Button3"/>
    </LinearLayout>
</LinearLayout>