Menu option

Option menu

1. To implement Option menu we have to add new folder in res/directory name menu.xml.

          In the new directory we have to make  menu .xml

     2.  Copy the code into the new menu.xml file

               <?xml version="1.0" encoding="utf-8"?>

                <menu xmlns:android="http://schemas.android.com/apk/res/android">
   
                 <item android:id="@+id/icon"
                          android:icon="@drawable/icon" />
  
                  <item android:id="@+id/text"
                          android:title="Text" />
  
                  <item android:id="@+id/icontext"
                          android:title="Icon and text"
                          android:icon="@drawable/icon" />

                         </menu>

     3.   Then change the main activity as follows:
        
                          public class SimpleOptionMenuActivity extends Activity {
                            /** Called when the activity is first created. */
                           @Override
            public boolean onCreateOptionsMenu(Menu menu)  //here specify the xml file defined by menu.xml
                    {
                          MenuInflater inflater = getMenuInflater();
                          inflater.inflate(R.menu.menu, menu);
                          return true;
                    }

On line 2 you see the parameter menu. In this menu we will inflate our own menu defined by our menu.xml.
On line 3 we get the MenuInflater from the Activity class. We need this MenuInflater object to inflate, or merge, our own menu in the menu given as a parameter on line 2.
Line 4 inflate the given menu with our own menu. Line 5 is just our return type.

    4.  To implement a reaction of our menu, we should override another method  onOptionItemSelected().                                         
         @Override
         public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.icon:     Toast.makeText(this, "You pressed the icon!", Toast.LENGTH_LONG).show();
                                break;
            case R.id.text:     Toast.makeText(this, "You pressed the text!", Toast.LENGTH_LONG).show();
                                break;
            case R.id.icontext: Toast.makeText(this,"You pressed the icon and text!", Toast.LENGTH_LONG).show();
                                break;
        }
        return true;
    }