Two Methods for Android to call menu

If you don't want to talk about anything, go directly to the Code:

Method 1:

Mainactivity. Java

Package COM. example. bluetoothchatv1; import android. OS. bundle; import android. app. activity; import android. util. log; import android. view. menu; import android. view. menuinflater; import android. view. menuitem; import android. widget. toast; public class mainactivity extends activity {@ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. activity_main);} // when you click menu, the system calls the oncreateoptionsmenu method of the current activity and transmits a menu object that implements a menu interface for you to use @ overridepublic Boolean oncreateoptionsmenu (menu) the four parameters of the {/** add () method are: * 1, group, and menu if no group is set. none, * 2, ID, this is very important, Android determines the different menus * 3, order according to this ID, the menu is now determined by the size of this parameter * 4. text. The displayed text */menu of the menu. add (menu. none, menu. first + 1, 5, "delete "). seticon (Android. r. drawable. ic_menu_delete); // seticon () method is used to set the menu icon. Here, the built-in icons are used. Students should pay attention to it and use // android. resources starting with R are provided by the system. The resources we provide ourselves are menus starting with R. add (menu. none, menu. first + 2, 2, "save "). seticon (Android. r. drawable. ic_menu_edit); menu. add (menu. none, menu. first + 3, 6, "help "). seticon (Android. r. drawable. ic_menu_help); menu. add (menu. none, menu. first + 4, 1, "add "). seticon (Android. r. drawable. ic_menu_add); menu. add (menu. none, menu. first + 5, 4, "Detailed "). seticon (Android. r. drawable. ic_menu_info_details); menu. add (menu. none, menu. first + 6, 3, "send "). seticon (Android. r. drawable. ic_menu_send); // return true will take effect return true;} // The menu item is selected for the event @ overridepublic Boolean onoptionsitemselected (menuitem item) {Switch (item. getitemid () {Case menu. first + 1: Toast. maketext (this, "the delete menu has been clicked", toast. length_long ). show (); break; Case menu. first + 2: Toast. maketext (this, "saved menu clicked", toast. length_long ). show (); break; Case menu. first + 3: Toast. maketext (this, "the Help menu has been clicked", toast. length_long ). show (); break; Case menu. first + 4: Toast. maketext (this, "added menu clicked", toast. length_long ). show (); break; Case menu. first + 5: Toast. maketext (this, "details menu clicked", toast. length_long ). show (); break; Case menu. first + 6: Toast. maketext (this, "the sending menu has been clicked", toast. length_long ). show (); break;} return false;} // The Show (); break;} Option menu is disabled in three cases, the menu button is clicked again, the back button is clicked, or the user selects a menu item @ overridepublic void onoptionsmenuclosed (menu) {toast. maketext (this, "option menu disabled", toast. length_long ). show () ;}// events before the menu is displayed @ overridepublic Boolean onprepareoptionsmenu (menu) {toast. maketext (this, "The onprepareoptionsmenu method will be called before the option menu is displayed. You can use this method to adjust the menu according to the current situation.", toast. length_long ). show (); // if false is returned, this method will consume the user-clicked menu action. The oncreateoptionsmenu method will not be called return true ;}}

Method 2:

Mainactivity. Java

Package COM. example. bluetoothchatv1; import android. OS. bundle; import android. app. activity; import android. util. log; import android. view. menu; import android. view. menuinflater; import android. view. menuitem; import android. widget. toast; public class mainactivity extends activity {@ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. activity_main);} // when you click menu, the system calls the oncreateoptionsmenu method of the current activity, upload a menu object that implements a menu interface for you to use // @ override // public Boolean oncreateoptionsmenu (menu) {// * Add () the four parameters of the method are: // * 1. group. If no group is set, write menu. none, // * 2, ID, this is very important, Android determines the different menu // * 3, order based on this ID, the menu is determined by the size of this parameter. // * 4. The text is displayed. // * // menu. add (menu. none, menu. first + 1, 5, "delete "). seticon (// android. r. drawable. ic_menu_delete); // The seticon () method is used to set the menu icon. Here, the built-in system icon is used. For more information, see /// android. resources starting with R are provided by the system. The resources we provide ourselves start with R. // menu. add (menu. none, menu. first + 2, 2, "save "). seticon (// android. r. drawable. ic_menu_edit); // menu. add (menu. none, menu. first + 3, 6, "help "). seticon (// android. r. drawable. ic_menu_help); // menu. add (menu. none, menu. first + 4, 1, "add "). seticon (// android. r. drawable. ic_menu_add); // menu. add (menu. none, menu. first + 5, 4, "Detailed "). seticon (// android. r. drawable. ic_menu_info_details); // menu. add (menu. none, menu. first + 6, 3, "send "). seticon (// android. r. drawable. ic_menu_send); // return true will take effect // return true; // The menu item is selected @ overridepublic Boolean onoptionsitemselected (menuitem item) {Switch (item. getitemid () {case R. id. item01: Toast. maketext (this, "the delete menu has been clicked", toast. length_long ). show (); break; case R. id. item02: Toast. maketext (this, "saved menu clicked", toast. length_long ). show (); break; case R. id. item03: Toast. maketext (this, "the Help menu has been clicked", toast. length_long ). show (); break; case R. id. item04: Toast. maketext (this, "added menu clicked", toast. length_long ). show (); break; case R. id. item05: Toast. maketext (this, "details menu clicked", toast. length_long ). show (); break; case R. id. item06: Toast. maketext (this, "the sending menu has been clicked", toast. length_long ). show (); break;} return false;} // The Show (); break;} Option menu is disabled in three cases, the menu button is clicked again, the back button is clicked, or the user selects a menu item @ overridepublic void onoptionsmenuclosed (menu) {toast. maketext (this, "option menu disabled", toast. length_long ). show () ;}// events before the menu is displayed @ overridepublic Boolean onprepareoptionsmenu (menu) {toast. maketext (this, "The onprepareoptionsmenu method will be called before the option menu is displayed. You can use this method to adjust the menu according to the current situation.", toast. length_long ). show (); // if false is returned, this method will consume the user-clicked menu action. The oncreateoptionsmenu method will not be called return true ;} @ override public Boolean oncreateoptionsmenu (menu) {log. I ("effecthchat:", "oncreateoptionsmenu"); // getmenuinflater (). inflate (R. menu. activity_menu, menu); menuinflater Inflater = getmenuinflater (); Inflater. inflate (R. menu. activity_menu, menu); Return true ;}}

Modify the activity_menu.xml File

<Menu xmlns: Android = "http://schemas.android.com/apk/res/android"> <item Android: Id = "@ + ID/item01" Android: icon = "@ Android: drawable/ic_menu_add" Android: title = "add"> </item> <item Android: Id = "@ + ID/item02" Android: icon = "@ Android: drawable/ic_menu_edit" Android: title = "edit"> </item> <item Android: Id = "@ + ID/item03" Android: icon = "@ Android: drawable/ic_menu_save" Android: title = "save"> </item> <item Android: Id = "@ + ID/item04" Android: icon = "@ Android: drawable/ic_menu_info_details" Android: title = "details"> </item> <item Android: Id = "@ + ID/item05" Android: icon = "@ Android: drawable/ic_menu_delete" Android: title = "delete"> </item> <item Android: Id = "@ + ID/item06" Android: icon = "@ Android: drawable/ic_menu_help" Android: title = "help"> </item> </menu>

Reference from: http://android.yaohuiji.com/archives/636

Thank you.