Android Chinese API (92) -- MenuInflater

Preface

This chapter is about android. view. MenuInflater. The version is Android 2.3 r1 and translated from "zookeeper". You are welcome to visit his blog: http://www.cnblogs.com/mxgsa/. thank you again for "zookeeper "! I look forward to your participation in Android Chinese API translation, contact me over140@gmail.com.

 

Statement

You are welcome to repost, but please keep the original source of the article :)

Blog Garden: http://www.cnblogs.com/

Android Chinese translation group: http://goo.gl/6vJQl

 

Body

I. Structure

Public class MenuInflater extends Object

Java. lang. Object

Android. view. MenuInflater

 

Direct subclass

TabActivity

 

Ii. Overview

　　　　

This class is used to instantiate the menu XML file as a menu object.

Due to performance, too many menus may cause a heavy burden because the program loads some pre-processed XML files during creation. Therefore, MenuInflater cannot be used for running more than one XmlPullParser xml file. It can only use the compiled resources returned by one XmlPullParser (R. Some files)

 

Iii. Constructor

Public MenuInflater (Context context)

Create a menu for filling

See

getMenuInflater()

 

Iv. Public Methods

Public voidInflate(Int menuRes, Menu menu)

The menu layer is filled with a specified xml resource.InflateException。

Parameters

MenuRes: The resource ID in the XML layout file to be loaded (for exampleR.menu.main_activity)

The items and sub-menus to be filled are added to the menus to be filled.

 

5. Supplement

Article Selection

How to Create a MenuInflater Android menu from xml

MenuInflater instance in Android

Use of MenuInflater in Android (layout definition menu)

Sample Code

Create a project, project file list

　　　　　　

MenuInfalterTest. java

Public class MenuInflaterTest extends Activity {
@ Override
Public void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. main );
}

Public boolean onCreateOptionsMenu (Menu menu ){
// Obtain the current menu
MenuInflater inflater = getMenuInflater ();
// Fill the menu
Inflater. inflate (R. menu. option_menu, menu );
Return true;
}

/**
* Processing menu click events
*/
Public boolean onOptionsItemSelected (MenuItem item ){
Switch (item. getItemId ()){
Case R. id. menu_add:
Break;
Case R. id. menu_wallaper:
Break;
Case R. id. menu_search:
Break;
Case R. id. menu_setting:
ShowSettings ();
Break;
}
Return super. onOptionsItemSelected (item );
}

/**
* Display setting options
*/
Private void showSettings (){
Intent settings = new Intent
(Android. provider. Settings. ACTION_SETTINGS );
Settings. setFlags (Intent. FLAG_ACTIVITY_NEW_TASK
| Intent. FLAG_ACTIVITY_RESET_TASK_IF_NEEDED );
StartActivity (settings );
}
}
}
Main. xml <? Xml version = "1.0" encoding = "UTF-8"?>
<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"
Android: orientation = "vertical"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
>
<TextView
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: text = "@ string/hello"
/>
</LinearLayout>
Option_menu.xml

<? Xml version = "1.0" encoding = "UTF-8"?>
<Menu xmlns: android = "http://schemas.android.com/apk/res/android">
<Item android: id = "@ + id/menu_add"
Android: title = "Add"
Android: icon = "@ android: drawable/ic_menu_add"/>
<Item android: id = "@ + id/menu_wallaper"
Android: title = "Wallpaper"
Android: icon = "@ android: drawable/ic_menu_gallery"/>
<Item android: id = "@ + id/menu_search"
Android: title = "Search"
Android: icon = "@ android: drawable/ic_search_category_default"/>
<Item android: id = "@ + id/menu_setting"
Android: title = "Settings"
Android: icon = "@ android: drawable/ic_menu_preferences"/>
</Menu>