"android first line code" learning record 02-use menu in activity
Last Update:2015-10-20
Source: Internet
Author: User
<span id="Label3"></p><p><p>Necessary Steps:</p></p> <ul> <ul> <li>Create a new menu folder in the Res directory and create a new menus file</li> <li>To add a menu item to it, like the following code:</li> </ul> </ul> <blockquote> <blockquote> <pre><menu xmlns:android= "http:<span style="color: #008000;">//</span><span style="color: #008000;">schema.android.com/apk/res/android" ></span> <<span style="color: #000000;">item Android:id</span>= "@+id/<span style="color: #000000;">itemId1" android:title</span>= "itemName1"/> <<span style="color: #000000;">item Android:id </span>= "@+id/<span style="color: #000000;">itemId2" android:title</span>= "itemName2"/></menu></pre> </blockquote> </blockquote> <ul> <ul> <li>Reload the Oncreateoptionsmenu () method in the activity using the menu to load the menu file, similar to the following code:</li> </ul> </ul> <blockquote> <blockquote> <pre><span style="color: #0000ff;"></span> public <span style="color: #0000ff;">Boolean</span> <span style="color: #000000;">oncreateoptionsmenu (menu menu) { getmenuinflater.inflate (r.menu); </span> <span style="color: #0000ff;">return</span> <span style="color: #0000ff;">true</span> <span style="color: #000000;">;}</span></pre> <p><span style="color: #000000; line-height: 1.5; background-color: initial;">Overload the Onoptionsitemselected () method in an activity that uses the menu to respond to the actions that are performed after each menu item click, similar to the following code:</span></p> </blockquote> </blockquote> <blockquote> <pre><span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Boolean</span></span><span style="color: #000000;"><span style="color: #000000;">onoptionsitemselected (MenuItem Item) {</span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Switch</span></span><span style="color: #000000;"><span style="color: #000000;">(item.getitemid ()) {</span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> case</span><span style="color: #000000;"><span style="color: #000000;">r.id.itemid1:</span> ...</span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Working with Code</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;"></span> break</span><span style="color: #000000;"><span style="color: #000000;">; </span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> case</span><span style="color: #000000;"><span style="color: #000000;">r.id.itemid2:</span> ...</span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Working with Code</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;"></span> break</span><span style="color: #000000;"><span style="color: #000000;">; </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">default</span></span><span style="color: #000000;"><span style="color: #000000;">: } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">true</span></span><span style="color: #000000;"><span style="color: #000000;">;}</span></span></pre> </blockquote><p><p>"android first line code" learning record 02-use menu in activity</p></p></span>
