How to Use Switch to DarkMode in Android

Hello friends today we will learn about How to Use switch to DarkMode in Android.Today we see in many apps, we are seeing the use of dark theme, so today we will see how we will use dark theme in our app.

First of all we will do a project in our android studio or where we want to use it.

activity_main

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="10dp"
        android:text="Switch"
        android:textColor="@color/purple_500"
        android:textSize="20sp"
        android:textStyle="bold" />

    <androidx.appcompat.widget.SwitchCompat
        android:id="@+id/switch1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="10dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        tools:layout_editor_absoluteY="197dp" />

</LinearLayout>

MainActivity

package com.example.darkmode;

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.app.AppCompatDelegate;
import androidx.appcompat.widget.SwitchCompat;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private SwitchCompat switchCompat;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        switchCompat = findViewById(R.id.switch1);
        SharedPreferences sharedPreferences = getSharedPreferences("sharedPrefs", MODE_PRIVATE);
        final SharedPreferences.Editor editor = sharedPreferences.edit();
        final boolean isDarkMode = sharedPreferences.getBoolean("isDarkMode", false);
        switchCompat.setChecked(sharedPreferences.getBoolean("value", true));

        if (isDarkMode) {
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);

        } else {

            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);

        }
        switchCompat.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (switchCompat.isChecked()) {
                    if (isDarkMode) {
                        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
                        editor.putBoolean("isDarkMode", false);
                        editor.apply();
                        editor.putBoolean("value", true);
                        editor.apply();
                        switchCompat.setChecked(true);

                    }
                } else {
                    AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
                    editor.putBoolean("isDarkMode", true);
                    editor.apply();
                    editor.putBoolean("value", false);
                    editor.apply();
                    switchCompat.setChecked(false);

                }
            }
        });
       
       }
       

Thanks