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/appcompat/widget/ViewStubCompat.java

@@ -0,0 +1,128 @@
+package androidx.appcompat.widget;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewParent;
+import f.AbstractC0336a;
+import java.lang.ref.WeakReference;
+import m.Y0;
+
+/* loaded from: classes.dex */
+public final class ViewStubCompat extends View {
+
+    /* renamed from: a, reason: collision with root package name */
+    public int f2503a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public int f2504b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public WeakReference f2505c;
+
+    /* renamed from: d, reason: collision with root package name */
+    public LayoutInflater f2506d;
+
+    public ViewStubCompat(Context context, AttributeSet attributeSet) {
+        super(context, attributeSet, 0);
+        this.f2503a = 0;
+        TypedArray obtainStyledAttributes = context.obtainStyledAttributes(attributeSet, AbstractC0336a.f6421A, 0, 0);
+        this.f2504b = obtainStyledAttributes.getResourceId(2, -1);
+        this.f2503a = obtainStyledAttributes.getResourceId(1, 0);
+        setId(obtainStyledAttributes.getResourceId(0, -1));
+        obtainStyledAttributes.recycle();
+        setVisibility(8);
+        setWillNotDraw(true);
+    }
+
+    public final View a() {
+        ViewParent parent = getParent();
+        if (!(parent instanceof ViewGroup)) {
+            throw new IllegalStateException("ViewStub must have a non-null ViewGroup viewParent");
+        }
+        if (this.f2503a == 0) {
+            throw new IllegalArgumentException("ViewStub must have a valid layoutResource");
+        }
+        ViewGroup viewGroup = (ViewGroup) parent;
+        LayoutInflater layoutInflater = this.f2506d;
+        if (layoutInflater == null) {
+            layoutInflater = LayoutInflater.from(getContext());
+        }
+        View inflate = layoutInflater.inflate(this.f2503a, viewGroup, false);
+        int i = this.f2504b;
+        if (i != -1) {
+            inflate.setId(i);
+        }
+        int indexOfChild = viewGroup.indexOfChild(this);
+        viewGroup.removeViewInLayout(this);
+        ViewGroup.LayoutParams layoutParams = getLayoutParams();
+        if (layoutParams != null) {
+            viewGroup.addView(inflate, indexOfChild, layoutParams);
+        } else {
+            viewGroup.addView(inflate, indexOfChild);
+        }
+        this.f2505c = new WeakReference(inflate);
+        return inflate;
+    }
+
+    @Override // android.view.View
+    public final void dispatchDraw(Canvas canvas) {
+    }
+
+    @Override // android.view.View
+    public final void draw(Canvas canvas) {
+    }
+
+    public int getInflatedId() {
+        return this.f2504b;
+    }
+
+    public LayoutInflater getLayoutInflater() {
+        return this.f2506d;
+    }
+
+    public int getLayoutResource() {
+        return this.f2503a;
+    }
+
+    @Override // android.view.View
+    public final void onMeasure(int i, int i4) {
+        setMeasuredDimension(0, 0);
+    }
+
+    public void setInflatedId(int i) {
+        this.f2504b = i;
+    }
+
+    public void setLayoutInflater(LayoutInflater layoutInflater) {
+        this.f2506d = layoutInflater;
+    }
+
+    public void setLayoutResource(int i) {
+        this.f2503a = i;
+    }
+
+    public void setOnInflateListener(Y0 y02) {
+    }
+
+    @Override // android.view.View
+    public void setVisibility(int i) {
+        WeakReference weakReference = this.f2505c;
+        if (weakReference != null) {
+            View view = (View) weakReference.get();
+            if (view == null) {
+                throw new IllegalStateException("setVisibility called on un-referenced view");
+            }
+            view.setVisibility(i);
+            return;
+        }
+        super.setVisibility(i);
+        if (i == 0 || i == 4) {
+            a();
+        }
+    }
+}