Merge pull request giantray#84 from lcs1795192/patch-1

添加第一个翻译

Author: giantray

contents/proper-use-cases-for-android-usermanager-isuseragoat.md

@@ -0,0 +1,38 @@
+##安卓中“UserManger.isUserAGoat()”的合适案例？
+
+###问题描述：
+我正在看在安卓4.2里介绍的新API。当看到“UserManger”类时，我遇到了如下的“method”：
+public boolean isUserAGoat()
+Used to determine whether the user making this call is subject to teleportations.
+
+Returns whether the user making this call is a goat.
+这个应该怎样使用和什么时候使用？
+
+###回答：
+根据他们的资料，在API21前，这个“method”用来返回“false”
+/**
+ * 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;
+}
+看起来这个“method”对我们开发者没有真正的用途。一些人之前认为它可能是个复活节彩蛋。
+再次编辑：
+在API21它改为判断是否存在有包“com.coffeestainstudios.goatsimulator”的已安装app。
+/**
+ * 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");
+}
+
+[stackoverflow链接：Proper use cases for Android UserManager.isUserAGoat()](http://stackoverflow.com/questions/13375357/proper-use-cases-for-android-usermanager-isuseragoat)