For the examples in this section, you will create two helper methods in the MenuExample.java file. They are CreateMenu() and MenuChoice(). Define the two helper methods and the onCreate() method as shown below:
package net.learn2develop.AndroidViews;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.Toast;
public class MenuExample extends Activity
{
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.menu);
Button btn = (Button) findViewById(R.id.btn1);
btn.setOnCreateContextMenuListener(this);
}
private void CreateMenu(Menu menu)
{
menu.setQwertyMode(true);
MenuItem mnu1 = menu.add(0, 0, 0, "Item 1");
{
mnu1.setAlphabeticShortcut('a');
mnu1.setIcon(R.drawable.alert_dialog_icon);
}
MenuItem mnu2 = menu.add(0, 1, 1, "Item 2");
{
mnu2.setAlphabeticShortcut('b');
mnu2.setIcon(R.drawable.ic_popup_reminder);
}
MenuItem mnu3 = menu.add(0, 2, 2, "Item 3");
{
mnu3.setAlphabeticShortcut('c');
mnu3.setIcon(R.drawable.icon);
}
MenuItem mnu4 = menu.add(0, 3, 3, "Item 4");
{
mnu4.setAlphabeticShortcut('d');
}
menu.add(0, 3, 3, "Item 5");
menu.add(0, 3, 3, "Item 6");
menu.add(0, 3, 3, "Item 7");
}
private boolean MenuChoice(MenuItem item)
{
switch (item.getItemId()) {
case 0:
Toast.makeText(this, "You clicked on Item 1",
Toast.LENGTH_LONG).show();
return true;
case 1:
Toast.makeText(this, "You clicked on Item 2",
Toast.LENGTH_LONG).show();
return true;
case 2:
Toast.makeText(this, "You clicked on Item 3",
Toast.LENGTH_LONG).show();
return true;
case 3:
Toast.makeText(this, "You clicked on Item 4",
Toast.LENGTH_LONG).show();
return true;
case 4:
Toast.makeText(this, "You clicked on Item 5",
Toast.LENGTH_LONG).show();
return true;
case 5:
Toast.makeText(this, "You clicked on Item 6",
Toast.LENGTH_LONG).show();
return true;
case 6:
Toast.makeText(this, "You clicked on Item 7",
Toast.LENGTH_LONG).show();
return true;
}
return false;
}
}
The CreateMenu() method creates a list of menu items and modifies the behavior of each menu item. The parameters for the add() method are: groupid, itemid, order, and title. The setAlphabeticShortcut() method assigns a keyboard shortcut to the menu item so that when the user presses a specific key, the menu item would be selected. The setIcon() method assigns an icon to the menu item.
The MenuChoice() method displays the selected menu item using the Toast class. Next, copy two images (as shown in Figure 3) into the res/drawable folder.
Figure 3 - Adding images to the res/drawable folder
