Fix jar file lost bug

yukihookapi/src/api/kotlin/me/weishu/reflection/BootstrapClass.java

@@ -0,0 +1,78 @@
+package me.weishu.reflection;
+
+import static android.os.Build.VERSION.SDK_INT;
+
+import android.os.Build;
+import android.util.Log;
+
+import androidx.annotation.Keep;
+
+import java.lang.reflect.Method;
+
+/**
+ * @author weishu
+ * @date 2020/7/13.
+ */
+@SuppressWarnings("ALL")
+@Keep
+public final class BootstrapClass {
+
+    private static final String TAG = "BootstrapClass";
+
+    private static Object sVmRuntime;
+    private static Method setHiddenApiExemptions;
+
+    static {
+        if (SDK_INT >= Build.VERSION_CODES.P) {
+            try {
+                Method forName = Class.class.getDeclaredMethod("forName", String.class);
+                Method getDeclaredMethod = Class.class.getDeclaredMethod("getDeclaredMethod", String.class, Class[].class);
+
+                Class<?> vmRuntimeClass = (Class<?>) forName.invoke(null, "dalvik.system.VMRuntime");
+                Method getRuntime = (Method) getDeclaredMethod.invoke(vmRuntimeClass, "getRuntime", null);
+                setHiddenApiExemptions = (Method) getDeclaredMethod.invoke(vmRuntimeClass, "setHiddenApiExemptions", new Class[]{String[].class});
+                sVmRuntime = getRuntime.invoke(null);
+            } catch (Throwable e) {
+                Log.w(TAG, "reflect bootstrap failed:", e);
+            }
+        }
+    }
+
+    /**
+     * make the method exempted from hidden API check.
+     *
+     * @param method the method signature prefix.
+     * @return true if success.
+     */
+    public static boolean exempt(String method) {
+        return exempt(new String[]{method});
+    }
+
+    /**
+     * make specific methods exempted from hidden API check.
+     *
+     * @param methods the method signature prefix, such as "Ldalvik/system", "Landroid" or even "L"
+     * @return true if success
+     */
+    public static boolean exempt(String... methods) {
+        if (sVmRuntime == null || setHiddenApiExemptions == null) {
+            return false;
+        }
+
+        try {
+            setHiddenApiExemptions.invoke(sVmRuntime, new Object[]{methods});
+            return true;
+        } catch (Throwable e) {
+            return false;
+        }
+    }
+
+    /**
+     * Make all hidden API exempted.
+     *
+     * @return true if success.
+     */
+    public static boolean exemptAll() {
+        return exempt(new String[]{"L"});
+    }
+}