package com.example.screern;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;

enum Colors {
    Red, Blue, Yellow;
}

public class MainActivity extends Activity implements OnClickListener{

    LinearLayout linearLayout1;

    Color nextColor = Colors.Blue;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        linearLayout1 = (LinearLayout)findViewById(R.id.LinearLayout1);
        linearLayout1.setOnClickListener(this);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public void onClick(View v) {
        switch (color) {
        case Red:
            linearLayout1.setBackgroundColor(Color.RED);
            nextColor = Colors.Yellow;
            break;
        case Yellow:
            linearLayout1.setBackgroundColor(Color.YELLOW);
            nextColor = Colors.Blue;
            break;
        case Blue:
        default:
            linearLayout1.setBackgroundColor(Color.YELLOW);
            nextColor = Colors.Red;
            break;
        }

    }
}