Primer paso de la investigacion. Se aportan el .apk, las carpetas con el apk extraido y el apk descompilado. El archivo API_DOCUMENTATION.md es un archivo donde se anotaran los descubrimientos del funcionamiento de la API, y los .py son scripts para probar la funcionalidad de la API con los métodos que vayamos encontrando. Finalmente, los archivos .js son scripts de Frida para extraer informacion de la APP durante la ejecucion.

apk_decompiled/sources/androidx/recyclerview/widget/U.java

@@ -0,0 +1,84 @@
+package androidx.recyclerview.widget;
+
+import android.view.View;
+import java.util.List;
+import kotlin.jvm.internal.LongCompanionObject;
+
+/* loaded from: classes.dex */
+public final class U {
+
+    /* renamed from: a, reason: collision with root package name */
+    public boolean f3754a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public int f3755b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public int f3756c;
+
+    /* renamed from: d, reason: collision with root package name */
+    public int f3757d;
+
+    /* renamed from: e, reason: collision with root package name */
+    public int f3758e;
+
+    /* renamed from: f, reason: collision with root package name */
+    public int f3759f;
+
+    /* renamed from: g, reason: collision with root package name */
+    public int f3760g;
+    public int h;
+    public int i;
+
+    /* renamed from: j, reason: collision with root package name */
+    public int f3761j;
+
+    /* renamed from: k, reason: collision with root package name */
+    public List f3762k;
+
+    /* renamed from: l, reason: collision with root package name */
+    public boolean f3763l;
+
+    public final void a(View view) {
+        int layoutPosition;
+        int size = this.f3762k.size();
+        View view2 = null;
+        int i = Integer.MAX_VALUE;
+        for (int i4 = 0; i4 < size; i4++) {
+            View view3 = ((I0) this.f3762k.get(i4)).itemView;
+            C0239r0 c0239r0 = (C0239r0) view3.getLayoutParams();
+            if (view3 != view && !c0239r0.f3897a.isRemoved() && (layoutPosition = (c0239r0.f3897a.getLayoutPosition() - this.f3757d) * this.f3758e) >= 0 && layoutPosition < i) {
+                view2 = view3;
+                if (layoutPosition == 0) {
+                    break;
+                } else {
+                    i = layoutPosition;
+                }
+            }
+        }
+        if (view2 == null) {
+            this.f3757d = -1;
+        } else {
+            this.f3757d = ((C0239r0) view2.getLayoutParams()).f3897a.getLayoutPosition();
+        }
+    }
+
+    public final View b(y0 y0Var) {
+        List list = this.f3762k;
+        if (list == null) {
+            View view = y0Var.k(this.f3757d, LongCompanionObject.MAX_VALUE).itemView;
+            this.f3757d += this.f3758e;
+            return view;
+        }
+        int size = list.size();
+        for (int i = 0; i < size; i++) {
+            View view2 = ((I0) this.f3762k.get(i)).itemView;
+            C0239r0 c0239r0 = (C0239r0) view2.getLayoutParams();
+            if (!c0239r0.f3897a.isRemoved() && this.f3757d == c0239r0.f3897a.getLayoutPosition()) {
+                a(view2);
+                return view2;
+            }
+        }
+        return null;
+    }
+}