Simpsons_fade_45

package com.example.simpsons45;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

    public void fade(View view){

        ImageView bartImageView = (ImageView) findViewById(R.id.bartImageView);
        ImageView homerImageView = (ImageView) findViewById(R.id.homerImageView);
        if (!flag) {
            bartImageView.animate().alpha(0).setDuration(1000);
            homerImageView.animate().alpha(1).setDuration(1000);
            flag = true;
        }
        else{
            bartImageView.animate().alpha(1).setDuration(1000);
            homerImageView.animate().alpha(0).setDuration(1000);
            flag= false;
        }
    }
    boolean flag = false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}