How to implement Bottom sheet dialog in android studio

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Working with the activity_main.xml file.

Navigate to the app > res > layout > activity_main.xml and add the below code to that file. Below is the code for the activity_main.xml file. 

<?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"

    android:background="@color/white">

    <Button

        android:id="@+id/openbtn"

        android:layout_width="150dp"

        android:layout_height="50dp"

        android:backgroundTint="@color/black"

        android:text="Open"

        android:textColor="@color/white"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent"

        tools:ignore="HardcodedText" />

    <TextView

        android:id="@+id/txtadd"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:textColor="@color/black"

        android:textSize="25sp"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintHorizontal_bias="0.498"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent"

        app:layout_constraintVertical_bias="0.219" />

</androidx.constraintlayout.widget.ConstraintLayout>

Working with the MainActivity.java file.

Go to the MainActivity.java file and refer to the following code. Below is the code for the MainActivity.java file. 

package com.example.bottom_dialog;

import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    Button btn;

    TextView edt;

    @SuppressLint("MissingInflatedId")

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        btn= findViewById(R.id.openbtn);

        edt = findViewById(R.id.txtadd);

        Intent intent = getIntent();

        String a = intent.getStringExtra("data");

        edt.setText(a);

        btn.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                Bottomsheet bottomsheet = new Bottomsheet();

                bottomsheet.show(getSupportFragmentManager(),"TAG");

            }

        });

    }

}

Create a new Layout file for out bottom sheet dialog.

Go to the row_add_item.xml file and refer to the following code. Below is the code for the row_add_item.xml file. 

<?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:orientation="vertical"

    android:background="@drawable/edittext2">

    

    <View

        android:layout_width="100dp"

        android:layout_height="3dp"

        android:layout_marginTop="10dp"

        android:layout_gravity="center_horizontal"

        android:background="#232222"/>

    <EditText

        android:id="@+id/new_add_task_name"

        android:layout_width="350dp"

        android:layout_height="45dp"

        android:background="@drawable/edit_text"

        android:layout_marginTop="50dp"

        android:layout_gravity="center_horizontal"

        android:hint="Task Name"

        android:textColorHint="#7733C1"

        android:paddingStart="20dp"

        tools:ignore="Autofill,HardcodedText,RtlSymmetry,TextFields" />

    <EditText

        android:id="@+id/new_add_task_des"

        android:layout_width="350dp"

        android:layout_height="45dp"

        android:background="@drawable/edit_text"

        android:layout_marginTop="20dp"

        android:layout_gravity="center_horizontal"

        android:hint="Task Description"

        android:textColorHint="#7733C1"

        android:paddingStart="20dp"

        tools:ignore="Autofill,HardcodedText,RtlSymmetry,TextFields" />

    <Button

        android:id="@+id/new_add_task_btn"

        android:layout_width="350dp"

        android:layout_height="50dp"

        android:layout_marginTop="30dp"

        android:layout_gravity="center_horizontal"

        android:backgroundTint="#7733C1"

        android:text="Done!!"

        android:textColor="@color/white"

        android:textSize="15sp"

        tools:ignore="HardcodedText" />

    <View

        android:layout_width="100dp"

        android:layout_height="3dp"

        android:layout_marginTop="20dp"

        android:layout_gravity="center_horizontal"

        android:background="#D5C3EC"/>

</LinearLayout>

Create a java class for  bottom sheet dialog.

Go to the Bottomsheet.java file and refer to the following code. Below is the code for the Bottomsheet.java file.

package com.example.bottom_dialog;

import android.annotation.SuppressLint;

import android.content.Intent;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

import androidx.annotation.NonNull;

import androidx.annotation.Nullable;

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

public class Bottomsheet extends BottomSheetDialogFragment {

    public Bottomsheet() {

    }

    @Nullable

    @Override

    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.row_add_item,container,false);

        Button btnadd=view.findViewById(R.id.new_add_task_btn);

        EditText ed= view.findViewById(R.id.new_add_task_name);

        btnadd.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                Intent intent =new Intent(getContext(), MainActivity.class);

                intent.putExtra("data",ed.getText().toString());

                startActivity(intent);

            }

        });

        return view;

    }

}