Notes

package com.example.droidcafe2;

import android.content.Intent;
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.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

import com.example.android.droidcafe.R;

/**
* This app shows images used as buttons to launch a second activity
* and displays a Toast message showing the delivery method chosen
* for a Droid Cafe food order. It also shows how to set up
* the options menu and floating action button.
*/
public class MainActivity extends AppCompatActivity {

/**
* Creates the content view, the toolbar, and
* the floating action button.
* This method is provided in the Basic Activity template.
*
* @param savedInstanceState Saved instance.
*/
@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();
}
});
}

/**
* Inflates the menu, and adds items to the action bar if it is present.
*
* @param menu Menu to inflate.
* @return Returns true if the menu inflated.
*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}

/**
* Handles app bar item clicks.
*
* @param item Item clicked.
* @return Returns true if one of the defined items was clicked.
*/
@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();

//noinspection SimplifiableIfStatement

if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}

/**
* Shows a message that the donut image was clicked.
*/
public void showDonutOrder(View view) {
showFoodOrder(getString(R.string.donut_order_message));
}

/**
* Shows a message that the ice cream sandwich image was clicked.
*/
public void showIceCreamOrder(View view) {
showFoodOrder(getString(R.string.ice_cream_order_message));
}

/**
* Shows a message that the froyo image was clicked.
*/
public void showFroyoOrder(View view) {
showFoodOrder(getString(R.string.froyo_order_message));
}

/**
* Displays a Toast message for the food order.
*
* @param message Message to display.
*/
public void showFoodOrder(String message) {
Toast.makeText(getApplicationContext(), message,
Toast.LENGTH_SHORT).show();
Intent intent = new Intent(this, OrderActivity.class);
startActivity(intent);
}
}