BottomSheetDialog Example Android

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_vertical|center_horizontal"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello"
        android:padding="10dp"
        android:layout_margin="10dp"
        android:textSize="30dp" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="SHOW DIALOG"
        android:textSize="30dp"
        android:layout_margin="20dp"
        android:id="@+id/button1"/>

</LinearLayout>

<?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="360dp"
    android:background="#ee64aa">

    <TextView
        android:id="@+id/textView11"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="This is a bottom sheet dialog"
        android:textSize="30dp"
        android:textColor="@color/white"
        app:layout_constraintBottom_toTopOf="@+id/button11"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button11"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Show Time"
        android:textSize="30dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.dialog;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;

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

import java.util.Date;

public class MainActivity extends AppCompatActivity {

    TextView textView1;

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

        textView1 = findViewById(R.id.textView1);
        Button button1 = findViewById(R.id.button1);

        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog();
            }
        });

    }

    public  void showDialog(){
        BottomSheetDialog mydialog = new BottomSheetDialog(MainActivity.this);
        mydialog.setContentView(R.layout.dialog);
        Button dialog_button = mydialog.findViewById(R.id.button11);
        dialog_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                textView1.setText("Date: " + new Date());
                mydialog.cancel();
            }
        });
        mydialog.create();
        mydialog.show();
    }
    
}