ScreenColor Changer

 

                        Color Changer

package com.example.buttoncolor;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         Button b1= findViewById(R.id.btnRed);
         Button b2= findViewById(R.id.btnOrange);
         Button b3= findViewById(R.id.btnGreen);
         Button b4= findViewById(R.id.btnBlue);
         Button b5= findViewById(R.id.btnPink);
         Button b6= findViewById(R.id.btnYellow);
        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                setMyScreenColor(Color.RED);
            }
        });
        b2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                setMyScreenColor(0xFFeb5c2d);
            }
        });
        b3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                setMyScreenColor(Color.GREEN);
            }
        });
        b4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                setMyScreenColor(Color.BLUE);
            }
        });
        b5.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

//0xFF is written before writing the color code :
                setMyScreenColor(0xFFe81099);
            }
        });
        b6.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                setMyScreenColor(Color.YELLOW);
            }
        });

    }
    public void setMyScreenColor(int color){
        View view =this.getWindow().getDecorView();
        view .setBackgroundColor(color);
    }
}

Image: