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テキスト


MenuInflater

版本:Android 2.3 r1

结构

继承关系

public classMenuInflaterextendsObject

java.lang.Object

android.view.MenuInflater

子类及间接子类

直接子类

TabActivity

概述

这个类是用来实例化菜单XML文件成菜单对象。

由于性能的原因,由于程序创建时候就加载一些预处理XML文件,Menu过多就造成很重的负担。因此,这是目前无法在运行时使用多于一个XmlPullParserxml文件去使用MenuInflater,它只能使用一个XmlPullParser返回的编译过的资源(R.某些文件)

构造函数

public MenuInflater (Context context)

构造填充(inflater)一个菜单

参见

getMenuInflater()

公共方法

public voidinflate(int menuRes, Menu menu)

菜单层次从一个指定的xml资源去填充,如果有错误会抛掷InflateException

参数

menuRes要加载XML布局文件中的资源ID(例如R.menu.main_activity

menu要填充的菜单,这些项目和子菜单就被添加到要填充菜单中

补充

文章精选

MenuInflater Android菜单从xml创建方法

AndroidMenuInflater实例

AndroidMenuInflater的使用(布局定义菜单)

示例代码

新建一个android2.2的项目,项目文件列表

MenuInfalterTest.java

publicclassMenuInflaterTestextendsActivity {

@Override

publicvoidonCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

}

publicbooleanonCreateOptionsMenu(Menu menu) {

//获取当前的菜单

MenuInflater inflater = getMenuInflater();

//填充菜单

inflater.inflate(R.menu.option_menu, menu);

returntrue;

}

publicbooleanonOptionsItemSelected(MenuItem item) {

switch(item.getItemId()) {

caseR.id.menu_add:

break;

caseR.id.menu_wallaper:

break;

caseR.id.menu_search:

break;

caseR.id.menu_setting:

showSettings();

break;

}

returnsuper.onOptionsItemSelected(item);

}

privatevoidshowSettings() {

Intent settings =newIntent

(android.provider.Settings.ACTION_SETTINGS);

settings.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK

| Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);

startActivity(settings);

}

}

}

Main.xml

xmlversion="1.0"encoding="utf-8"?>

<LinearLayoutxmlns: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

xmlversion="1.0"encoding="utf-8"?>

<menuxmlns:android="http://schemas.android.com/apk/res/android">

<itemandroid:id="@+id/menu_add"

android:title="Add"

android:icon="@android:drawable/ic_menu_add"/>

<itemandroid:id="@+id/menu_wallaper"

android:title="Wallpaper"

android:icon="@android:drawable/ic_menu_gallery"/>

<itemandroid:id="@+id/menu_search"

android:title="Search"

android:icon="@android:drawable/ic_search_category_default"/>

<itemandroid:id="@+id/menu_setting"

android:title="Settings"

android:icon="@android:drawable/ic_menu_preferences"/>menu>


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