Android programming-option menu & context menu basic usage

I found that I spent a lot of time learning every android interface control. Because I am a beginner, I may still need to improve my learning methods and methods.

This document describes the basic implementation and usage of option menus and context menus.

The option menu is the bottom menu popped up by pressing the menu key of the mobile phone. A maximum of six items are displayed at the same time. More items are displayed as more... click to submenu.

// Add a menu item

@ Overridepublic Boolean oncreateoptionsmenu (menu) {// todo auto-generated method stubmainmenu = menu; mainmenu. add (0, 1, menu. none, "menu 1 "). seticon (R. drawable. icon); mainmenu. add (0, 2, menu. none, "menu 2"); mainmenu. add (0, 3, menu. none, "menu 3"); mainmenu. add (1, 4, menu. none, "menu 4"); mainmenu. add (1, 5, menu. none, "menu 5"); mainmenu. add (1, 6, menu. none, "menu 6"); // The first parameter of ADD is the group number. You can click the button to hide the return Super. oncreateoptionsmenu (menu );}

// Implement menu Behavior

@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// TODO Auto-generated method stubsetTitle(item.getItemId() + item.getTitle().toString());return super.onOptionsItemSelected(item);}

// Hide a group menu function and write it in the listener function of a button

Private onclicklistener toggle_listen = new onclicklistener () {public void onclick (view v) {If (misgroupvisible = true) {mainmenu. setgroupvisible (1, false); // hide the menu group misgroupvisible = false;} else {mainmenu. setgroupvisible (1, true); misgroupvisible = true ;}}};

// Register the oncreat function to accept the long-pressed response context menu

// Register the context menu this. registerforcontextmenu (findviewbyid (R. Id. longan2) for two text boxes; this. registerforcontextmenu (findviewbyid (R. Id. Longan ));

// Add a long-pressed menu item

@ Overridepublic void oncreatecontextmenu (contextmenu menu, view V, contextmenuinfo menuinfo) {// todo auto-generated method stubswitch (v. GETID () {case R. id. longan: // If (menu. hasvisibleitems () return; menu. add (2, 11, menu. none, "menu 1"); submenu master = menu. addsubmenu (4, 41, 1, "Master .. "); // submenu is a sub-menu with only one layer. You can click master. add ("WT1"); master. add ("WT2"); master. add ("wt3"); menu. add (2, 12, menu. none, "menu 2"); menu. add (2, 13, menu. none, "menu 3"); menu. add (2, 14, menu. none, "menu 4"); break; case R. id. longan2: menu. add (3, 21, menu. none, "menu 21"); menu. add (3, 22, menu. none, "menu 22"); break;} super. oncreatecontextmenu (menu, V, menuinfo );}

// Menu response function, similar to the previous option menu

@Overridepublic boolean onContextItemSelected(MenuItem item) {// TODO Auto-generated method stubsetTitle(item.getTitle());return super.onContextItemSelected(item);}