Sometimes need to group your Options menu items.
Group is very useful when you need to work (remove,disable or hide) with several menu items.
I am going to show example about how to remove,disable/enable and hide/show group of menu items.
These operations are very simple I will not describe how they works. You need to copy this class to your IDE and run it and you will understand how it work:
These operations are very simple I will not describe how they works. You need to copy this class to your IDE and run it and you will understand how it work:
import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class Main extends Activity{private boolean isRemoved = false;private boolean isEnabled = false;private boolean isVisible = false;private static final int FILE = 0;private static final int EDIT = 1;private static final int VIEW = 2;private static final int NEW_MENU_ITEM = Menu.FIRST;private static final int SAVE_MENU_ITEM = NEW_MENU_ITEM + 1;private static final int CUT_MENU_ITEM = SAVE_MENU_ITEM + 1;private static final int COPY_MENU_ITEM = CUT_MENU_ITEM + 1;private static final int LIST_MENU_ITEM = COPY_MENU_ITEM + 1;private static final int ICON_MENU_ITEM = LIST_MENU_ITEM + 1;@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);Button rmBtn = (Button) findViewById(R.id.rmBtn);rmBtn.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){isRemoved = true}});Button enableBtn = (Button) findViewById(R.id.enableBtn);enableBtn.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){if(isEnabled){isEnabled = false} else{isEnabled = true}}});Button visibleBtn = (Button) findViewById(R.id.visibleBtn);visibleBtn.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){if(isVisible){isVisible = false} else{isVisible = true}}})}@Overridepublic boolean onPrepareOptionsMenu(Menu menu){menu.clear();menu.add(FILE,NEW_MENU_ITEM,0,"New");menu.add(FILE,SAVE_MENU_ITEM,1,"Save");if(isRemoved){menu.removeGroup(FILE)}menu.add(EDIT,CUT_MENU_ITEM,2,"Cut");menu.add(EDIT,COPY_MENU_ITEM,3,"Edit");if(isEnabled){menu.setGroupEnabled(EDIT,true)} else{menu.setGroupEnabled(EDIT,false)}menu.add(VIEW,LIST_MENU_ITEM,4,"List");menu.add(VIEW,ICON_MENU_ITEM,5,"Icons");if(isVisible){menu.setGroupVisible(VIEW,true)} else{menu.setGroupVisible(VIEW,false)}return super.onCreateOptionsMenu(menu)}}Above example shows how to remove whole menu items group
menu.removeGroup(FILE);
How to enable and disable whole menu items group
menu.setGroupEnabled(EDIT,true/false);
How to show and hide whole menu items group
menu.setGroupVisible(VIEW,true/false);
As you see it is very easy,and it is very useful when you have group of menu items.
Personally I very often use groups of menu items and also these methods.
I hope that this example was useful for you.
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