Support hooking class static initializer

Author: yujincheng08

api/src/main/java/io/github/libxposed/api/XposedInterface.java

@@ -271,6 +271,37 @@ interface MethodUnhooker<T> {
     @NonNull
     MethodUnhooker<Method> hook(@NonNull Method origin, @NonNull Class<? extends Hooker> hooker);
 
+    /**
+     * Hook the static initializer of a class with default priority.
+     * <p>
+     * Note: If the class is initialized, the hook will never be called.
+     * </p>
+     *
+     * @param origin The class to be hooked
+     * @param hooker The hooker class
+     * @return Unhooker for canceling the hook
+     * @throws IllegalArgumentException if class has no static initializer or hooker is invalid
+     * @throws HookFailedError          if hook fails due to framework internal error
+     */
+    @NonNull
+    <T> MethodUnhooker<Constructor<T>> hookClassInitializer(@NonNull Class<T> origin, @NonNull Class<? extends Hooker> hooker);
+
+    /**
+     * Hook the static initializer of a class with specified priority.
+     * <p>
+     * Note: If the class is initialized, the hook will never be called.
+     * </p>
+     *
+     * @param origin   The class to be hooked
+     * @param priority The hook priority
+     * @param hooker   The hooker class
+     * @return Unhooker for canceling the hook
+     * @throws IllegalArgumentException if class has no static initializer or hooker is invalid
+     * @throws HookFailedError          if hook fails due to framework internal error
+     */
+    @NonNull
+    <T> MethodUnhooker<Constructor<T>> hookClassInitializer(@NonNull Class<T> origin, int priority, @NonNull Class<? extends Hooker> hooker);
+
     /**
      * Hook a method with specified priority.
      *
@@ -358,6 +389,7 @@ interface MethodUnhooker<T> {
     /**
      * Basically the same as {@link Constructor#newInstance(Object...)}, but calls the original constructor
      * as it was before the interception by Xposed.
+     *
      * @param constructor The constructor to create and initialize a new instance
      * @param thisObject  The instance to be constructed
      * @param args        The arguments used for the construction

api/src/main/java/io/github/libxposed/api/XposedInterfaceWrapper.java

@@ -55,6 +55,18 @@ public final MethodUnhooker<Method> hook(@NonNull Method origin, @NonNull Class<
         return mBase.hook(origin, hooker);
     }
 
+    @NonNull
+    @Override
+    public <T> MethodUnhooker<Constructor<T>> hookClassInitializer(@NonNull Class<T> origin, @NonNull Class<? extends Hooker> hooker) {
+        return mBase.hookClassInitializer(origin, hooker);
+    }
+
+    @NonNull
+    @Override
+    public <T> MethodUnhooker<Constructor<T>> hookClassInitializer(@NonNull Class<T> origin, int priority, @NonNull Class<? extends Hooker> hooker) {
+        return mBase.hookClassInitializer(origin, priority, hooker);
+    }
+
     @NonNull
     @Override
     public final MethodUnhooker<Method> hook(@NonNull Method origin, int priority, @NonNull Class<? extends Hooker> hooker) {