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MainActivity.java
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MainActivity.java
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package com.example.finalstrobelight;
import androidx.appcompat.app.AppCompatActivity;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
public class MainActivity extends AppCompatActivity {
Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RelativeLayout bgElement = findViewById(R.id.activity_main);
bgElement.setBackgroundColor(Color.WHITE);
myButtonListenerMethod();
}
public void myButtonListenerMethod() {
button = (Button)findViewById(R.id.BUTTON);
button.setOnClickListener(new
View.OnClickListener() {
@Override
public void onClick(View v) {
RelativeLayout bgElement =
(RelativeLayout)findViewById(R.id.activity_main);
int color = ((ColorDrawable)
bgElement.getBackground()).getColor();
if (color == Color.RED) {
bgElement.setBackgroundColor(Color.BLUE);
}
else {
bgElement.setBackgroundColor(Color.RED );
}
}
});
}
}