diff --git a/include/android/permission_manager.h b/include/android/permission_manager.h
new file mode 100644
index 0000000..7817126
--- /dev/null
+++ b/include/android/permission_manager.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_PERMISSION_MANAGER_H
+#define ANDROID_PERMISSION_MANAGER_H
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+__BEGIN_DECLS
+
+/**
+ * Permission check results.
+ *
+ * Introduced in API 31.
+ */
+enum {
+    /**
+     * This is returned by APermissionManager_checkPermission()
+     * if the permission has been granted to the given package.
+     */
+    PERMISSION_MANAGER_PERMISSION_GRANTED = 0,
+    /**
+     * This is returned by APermissionManager_checkPermission()
+     * if the permission has not been granted to the given package.
+     */
+    PERMISSION_MANAGER_PERMISSION_DENIED = -1,
+};
+
+/**
+ * Permission check return status values.
+ *
+ * Introduced in API 31.
+ */
+enum {
+    /**
+     * This is returned if the permission check completed without errors.
+     * The output result is valid and contains one of {PERMISSION_MANAGER_PERMISSION_GRANTED,
+     * PERMISSION_MANAGER_PERMISSION_DENIED}.
+     */
+    PERMISSION_MANAGER_STATUS_OK = 0,
+    /**
+     * This is returned if the permission check encountered an unspecified error.
+     * The output result is unmodified.
+     */
+    PERMISSION_MANAGER_STATUS_ERROR_UNKNOWN = -1,
+    /**
+     * This is returned if the permission check failed because the service is
+     * unavailable. The output result is unmodified.
+     */
+    PERMISSION_MANAGER_STATUS_SERVICE_UNAVAILABLE = -2,
+};
+
+#if __ANDROID_API__ >= 31
+
+/**
+ * Checks whether the package with the given pid/uid has been granted a permission.
+ *
+ * Note that the Java API of Context#checkPermission() is usually faster due to caching,
+ * thus is preferred over this API wherever possible.
+ *
+ * @param permission the permission to be checked.
+ * @param pid the process id of the package to be checked.
+ * @param uid the uid of the package to be checked.
+ * @param outResult output of the permission check result.
+ *
+ * @return error codes if any error happened during the check.
+ */
+int32_t APermissionManager_checkPermission(const char* permission,
+                                           pid_t pid,
+                                           uid_t uid,
+                                           int32_t* outResult) __INTRODUCED_IN(31);
+
+#endif // __ANDROID_API__ >= 31
+
+__END_DECLS
+
+#endif  // ANDROID_PERMISSION_MANAGER_H
diff --git a/libs/binder/ActivityManager.cpp b/libs/binder/ActivityManager.cpp
index 5e4c98f..727ea60 100644
--- a/libs/binder/ActivityManager.cpp
+++ b/libs/binder/ActivityManager.cpp
@@ -17,6 +17,7 @@
 #include <mutex>
 #include <unistd.h>
 
+#include <android/permission_manager.h>
 #include <binder/ActivityManager.h>
 #include <binder/Binder.h>
 #include <binder/IServiceManager.h>
@@ -98,6 +99,18 @@
     return PROCESS_STATE_UNKNOWN;
 }
 
+status_t ActivityManager::checkPermission(const String16& permission,
+                                     const pid_t pid,
+                                     const uid_t uid,
+                                     int32_t* outResult) {
+    sp<IActivityManager> service = getService();
+    if (service != nullptr) {
+        return service->checkPermission(permission, pid, uid, outResult);
+    }
+    // ActivityManagerService appears dead. Return usual error code for dead service.
+    return DEAD_OBJECT;
+}
+
 status_t ActivityManager::linkToDeath(const sp<IBinder::DeathRecipient>& recipient) {
     sp<IActivityManager> service = getService();
     if (service != nullptr) {
diff --git a/libs/binder/IActivityManager.cpp b/libs/binder/IActivityManager.cpp
index 1eb5363..e9f5aae 100644
--- a/libs/binder/IActivityManager.cpp
+++ b/libs/binder/IActivityManager.cpp
@@ -17,9 +17,11 @@
 #include <unistd.h>
 #include <fcntl.h>
 
+#include <android/permission_manager.h>
 #include <binder/ActivityManager.h>
 #include <binder/IActivityManager.h>
 #include <binder/Parcel.h>
+#include <utils/Errors.h>
 
 namespace android {
 
@@ -104,6 +106,23 @@
         }
         return reply.readInt32();
     }
+
+    virtual status_t checkPermission(const String16& permission,
+                                    const pid_t pid,
+                                    const uid_t uid,
+                                    int32_t* outResult) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IActivityManager::getInterfaceDescriptor());
+        data.writeString16(permission);
+        data.writeInt32(pid);
+        data.writeInt32(uid);
+        status_t err = remote()->transact(CHECK_PERMISSION_TRANSACTION, data, &reply);
+        if (err != NO_ERROR || ((err = reply.readExceptionCode()) != NO_ERROR)) {
+            return err;
+        }
+        *outResult = reply.readInt32();
+        return NO_ERROR;
+    }
 };
 
 // ------------------------------------------------------------------------------------
diff --git a/libs/binder/include/binder/ActivityManager.h b/libs/binder/include/binder/ActivityManager.h
index 9108e31..6796723 100644
--- a/libs/binder/include/binder/ActivityManager.h
+++ b/libs/binder/include/binder/ActivityManager.h
@@ -77,9 +77,9 @@
     void unregisterUidObserver(const sp<IUidObserver>& observer);
     bool isUidActive(const uid_t uid, const String16& callingPackage);
     int getUidProcessState(const uid_t uid, const String16& callingPackage);
+    status_t checkPermission(const String16& permission, const pid_t pid, const uid_t uid, int32_t* outResult);
 
-
-  status_t linkToDeath(const sp<IBinder::DeathRecipient>& recipient);
+    status_t linkToDeath(const sp<IBinder::DeathRecipient>& recipient);
     status_t unlinkToDeath(const sp<IBinder::DeathRecipient>& recipient);
 
 private:
diff --git a/libs/binder/include/binder/IActivityManager.h b/libs/binder/include/binder/IActivityManager.h
index e0248f6..4573347 100644
--- a/libs/binder/include/binder/IActivityManager.h
+++ b/libs/binder/include/binder/IActivityManager.h
@@ -39,13 +39,18 @@
     virtual void unregisterUidObserver(const sp<IUidObserver>& observer) = 0;
     virtual bool isUidActive(const uid_t uid, const String16& callingPackage) = 0;
     virtual int32_t getUidProcessState(const uid_t uid, const String16& callingPackage) = 0;
+    virtual status_t checkPermission(const String16& permission,
+                                    const pid_t pid,
+                                    const uid_t uid,
+                                    int32_t* outResult) = 0;
 
     enum {
         OPEN_CONTENT_URI_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
         REGISTER_UID_OBSERVER_TRANSACTION,
         UNREGISTER_UID_OBSERVER_TRANSACTION,
         IS_UID_ACTIVE_TRANSACTION,
-        GET_UID_PROCESS_STATE_TRANSACTION
+        GET_UID_PROCESS_STATE_TRANSACTION,
+        CHECK_PERMISSION_TRANSACTION,
     };
 };