Android常数值至常数名称(app：showAsAction =“ 2”)

概述我已经反编译了一些代码,并且试图找出与常量值一起出现的常量名称.在我的一个xml文件中,我看到了app：showAsAction=“2”.看起来像是accordingandroid,它可以取值“ifRoom”|“从不”|“withText”|“总是”|“collapseActionView”但是我如何找出哪一个呢？有时我可以

我已经反编译了一些代码,并且试图找出与常量值一起出现的常量名称.在我的一个xml文件中,我看到了app：showAsAction =“ 2”.看起来像是according android,它可以取值“ ifRoom” | “从不” | “ withText” | “总是” | “ collapseActionVIEw”但是我如何找出哪一个呢？有时我可以在网上找到对常量值-名称映射的引用,但有时却找不到.有办法确定吗？

<?xml version="1.0" enCoding="utf-8"?><menu xmlns:androID="http://schemas.androID.com/apk/res/androID" xmlns:app="http://schemas.androID.com/apk/res-auto">    <item androID:icon="@drawable/my_drawable" androID:enabled="false" androID:title="my Title" app:showAsAction="2"></item></menu>

解决方法:

你当然可以,

您需要查看androID.vIEw.MenuItem的源代码.在那里定义了许多常量,包括您需要的常量.

public static final int SHOW_AS_ACTION_ALWAYS = 2;

这是androID.vIEw.MenuItem接口的来源,

public interface MenuItem {    /*     * These should be kept in sync with attrs.xml enum constants for showAsAction     */    /** Never show this item as a button in an Action bar. */    public static final int SHOW_AS_ACTION_NEVER = 0;    /** Show this item as a button in an Action bar if the system decIDes there is room for it. */    public static final int SHOW_AS_ACTION_IF_ROOM = 1;    /**     * Always show this item as a button in an Action bar.     * Use sparingly! If too many items are set to always show in the Action bar it can     * crowd the Action bar and degrade the user experIEnce on devices with smaller screens.     * A good rule of thumb is to have no more than 2 items set to always show at a time.     */    public static final int SHOW_AS_ACTION_ALWAYS = 2;    /**     * When this item is in the action bar, always show it with a text label even if     * it also has an icon specifIEd.     */    public static final int SHOW_AS_ACTION_WITH_TEXT = 4;    /**     * This item's action vIEw collapses to a normal menu item.     * When expanded, the action vIEw temporarily takes over     * a larger segment of its container.     */    public static final int SHOW_AS_ACTION_ColLAPSE_ACTION_VIEW = 8;    ...}

This链接到MenuItem类的源代码

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