diff --git a/README.en.md b/README.en.md
index a4b3cb2..9ca51d1 100644
--- a/README.en.md
+++ b/README.en.md
@@ -83,6 +83,7 @@ Other languages: [:cn: Chinese](./README.md)
     * [Screen density](#screen-density-1)
     * [Overscan](#overscan)
     * [Turn off Android Debug](#turn-off-android-debug)
+    * [allow/forbidden access non SDK API](#allowforbidden-access-non-sdk-api)
     * [Show/hide status bar or navigation bar](#showhide-status-bar-or-navigation-bar)
 * [Utility functions](#utility-functions)
     * [Screenshots](#screenshots)
@@ -1860,6 +1861,33 @@ So just do it on device manually:
 
 "Settings" - "Developer options" - "Android Debug".
 
+### allow/forbidden access non SDK API
+
+allow access non SDK API:
+
+```sh
+adb shell settings put global hidden_api_policy_pre_p_apps 1
+adb shell settings put global hidden_api_policy_p_apps 1
+```
+
+forbidden access non SDK API:
+
+```sh
+adb shell settings delete global hidden_api_policy_pre_p_apps
+adb shell settings delete global hidden_api_policy_p_apps
+```
+
+*Note: Commands above don't need root privileges.*
+
+meaning for number in command tail:
+
+| value | meaning                                                                                                                                                            |
+|-------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| 0     | disable detect for non SDK API call. In this situation, there is no call log in logcat, and make strict mode API, detectNonSdkApiUsage() invalid. Not recommended. |
+| 1     | Just warning -- allow access all non SDK API, but retain warning in logcat. You can continue to use strick mode API.                                               |
+| 2     | It is forbidden to invoke interfaces in dark grey lists and black lists.                                                                                           |
+| 3     | It is forbidden to invoke the interface in the black list, but it is allowed to call the interface in the dark grey list.                                          |
+
 ### Show/hide status bar or navigation bar
 
 Settings in this section correspond with "Expanded desktop" in Cyanogenmod.
diff --git a/README.md b/README.md
index e04898a..fca635a 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,7 @@ Other languages: [:gb: English](./README.en.md)
     * [屏幕密度](#屏幕密度-1)
     * [显示区域](#显示区域)
     * [关闭 USB 调试模式](#关闭-usb-调试模式)
+    * [允许/禁止访问非 SDK API](#允许禁止访问非-sdk-api)
     * [状态栏和导航栏的显示隐藏](#状态栏和导航栏的显示隐藏)
 * [实用功能](#实用功能)
     * [屏幕截图](#屏幕截图)
@@ -1866,6 +1867,33 @@ adb shell settings put global adb_enabled 0
 
 去设备上手动恢复吧：「设置」-「开发者选项」-「Android 调试」。
 
+### 允许/禁止访问非 SDK API
+
+允许访问非 SDK API：
+
+```sh
+adb shell settings put global hidden_api_policy_pre_p_apps 1
+adb shell settings put global hidden_api_policy_p_apps 1
+```
+
+禁止访问非 SDK API：
+
+```sh
+adb shell settings delete global hidden_api_policy_pre_p_apps
+adb shell settings delete global hidden_api_policy_p_apps
+```
+
+不需要设备获得 Root 权限。
+
+命令最后的数字的含义：
+
+| 值 | 含义                                                                                                                      |
+|----|---------------------------------------------------------------------------------------------------------------------------|
+| 0  | 禁止检测非 SDK 接口的调用。该情况下，日志记录功能被禁用，并且令 strict mode API，即 detectNonSdkApiUsage() 无效。不推荐。 |
+| 1  | 仅警告——允许访问所有非 SDK 接口，但保留日志中的警告信息，可继续使用 strick mode API。                                     |
+| 2  | 禁止调用深灰名单和黑名单中的接口。                                                                                        |
+| 3  | 禁止调用黑名单中的接口，但允许调用深灰名单中的接口。                                                                      |
+
 ### 状态栏和导航栏的显示隐藏
 
 本节所说的相关设置对应 Cyanogenmod 里的「扩展桌面」。