HLessJon Tutorials

package com.mycompany.menusettings;

import android.graphics.Color;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.RelativeLayout;

public class MainActivity extends AppCompatActivity {
   //new
   RelativeLayout relativeLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
    }


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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        // new RelativeLayout ADDED
        relativeLayout = (RelativeLayout) findViewById(R.id.primary_relativeLayout);

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {

            relativeLayout.setBackgroundColor(Color.GREEN);
           return true;
        }
        else if (id == R.id.action_red) {
            relativeLayout.setBackgroundColor(Color.RED);
            return true;

        }
        else if (id == R.id.action_yellow) {
            relativeLayout.setBackgroundColor(Color.YELLOW);
            return true;

        }
        else if (id == R.id.action_blue) {
            relativeLayout.setBackgroundColor(Color.BLUE);
            return true;
        }
        else {
            relativeLayout.setBackgroundColor(Color.WHITE);
            return true;

        }



    }
}