我一直在寻找在的Andr​​oid 4.2 推出了新的API。 在注视UserManager一流的我碰到下面的方法：

I was looking at the new APIs introduced in Android 4.2. While looking at the UserManager class I came across the following method:

公共布​​尔isUserAGoat（）

public boolean isUserAGoat ()

用于确定在进行此调用用户是否受到teleportations。

Used to determine whether the user making this call is subject to teleportations.

返回在进行此调用用户是否是山羊。

Returns whether the user making this call is a goat.

如何以及何时该使用？

推荐答案

从他们的 source,该方法用于返回假，直到它在21 API被改变。

From their source, the method used to return false until it was changed in API 21.

/**
 * Used to determine whether the user making this call is subject to
 * teleportations.
 * @return whether the user making this call is a goat 
 */
public boolean isUserAGoat() {
    return false;
}

它看起来像方法没有真正使用我们作为开发商。有人做过previously表示，它可能是一个 复活节彩蛋 。

It looks like the method has no real use for us as developers. Someone has previously stated that it might be an Easter egg.

编辑：

在21 API执行改为检查是否有与包的安装的应用程序 com.coffeestainstudios.goatsimulator

In API 21 the implementation was changed to check if there is an installed app with the package com.coffeestainstudios.goatsimulator

/**
 * Used to determine whether the user making this call is subject to
 * teleportations.
 *
 * <p>As of {@link android.os.Build.VERSION_CODES#LOLLIPOP}, this method can
 * now automatically identify goats using advanced goat recognition technology.</p>
 *
 * @return Returns true if the user making this call is a goat.
 */
public boolean isUserAGoat() {
    return mContext.getPackageManager()
            .isPackageAvailable("com.coffeestainstudios.goatsimulator");
}

下面是更新后的 source链接

Here is the updated source link