added reflection helper

make content provider authorities dynamic

restrictionbypass/src/androidTest/java/org/chickenhook/restrictionbypass/ReflectionHelperTest.java

@@ -0,0 +1,16 @@
+package org.chickenhook.restrictionbypass;
+
+import org.chickenhook.restrictionbypass.helpers.Reflection;
+import org.junit.Test;
+
+import static org.junit.Assert.assertSame;
+
+public class ReflectionHelperTest {
+
+    Object reflectiveField = new Object();
+
+    @Test
+    public void getReflective() throws Exception {
+        assertSame(Reflection.getReflective(this, "reflectiveField"), reflectiveField);
+    }
+}

restrictionbypass/src/main/AndroidManifest.xml

@@ -5,7 +5,7 @@
     <application>
         <provider
             android:name=".BypassProvider"
-            android:authorities="org.chickenhook.restrictionbypass"
+            android:authorities="${applicationId}.restrictionbypass"
             android:enabled="true"
             android:exported="false"></provider>
     </application>

restrictionbypass/src/main/java/org/chickenhook/restrictionbypass/helpers/Reflection.java

@@ -0,0 +1,21 @@
+package org.chickenhook.restrictionbypass.helpers;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import java.lang.reflect.Field;
+
+public class Reflection {
+
+    public static @Nullable
+    <T> T getReflective(@NonNull Object obj, @NonNull String field) throws NoSuchFieldException, IllegalAccessException {
+        return getReflective(obj, obj.getClass(), field);
+    }
+
+    public static @Nullable
+    <T> T getReflective(@Nullable Object obj, @NonNull Class<?> cls, @NonNull String field) throws NoSuchFieldException, IllegalAccessException {
+        Field f = cls.getDeclaredField(field);
+        f.setAccessible(true);
+        return (T) f.get(obj);
+    }
+}