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/com/google/android/material/datepicker/i.java

@@ -0,0 +1,65 @@
+package com.google.android.material.datepicker;
+
+import android.icu.text.DateFormat;
+import android.icu.text.DisplayContext;
+import android.icu.util.TimeZone;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import androidx.recyclerview.widget.v0;
+import com.google.android.material.button.MaterialButton;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.Locale;
+import java.util.concurrent.atomic.AtomicReference;
+
+/* loaded from: classes3.dex */
+public final class i extends v0 {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final /* synthetic */ s f5653a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final /* synthetic */ MaterialButton f5654b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public final /* synthetic */ k f5655c;
+
+    public i(k kVar, s sVar, MaterialButton materialButton) {
+        this.f5655c = kVar;
+        this.f5653a = sVar;
+        this.f5654b = materialButton;
+    }
+
+    @Override // androidx.recyclerview.widget.v0
+    public final void onScrollStateChanged(RecyclerView recyclerView, int i) {
+        if (i == 0) {
+            recyclerView.announceForAccessibility(this.f5654b.getText());
+        }
+    }
+
+    @Override // androidx.recyclerview.widget.v0
+    public final void onScrolled(RecyclerView recyclerView, int i, int i4) {
+        k kVar = this.f5655c;
+        int S02 = i < 0 ? ((LinearLayoutManager) kVar.h.getLayoutManager()).S0() : ((LinearLayoutManager) kVar.h.getLayoutManager()).T0();
+        b bVar = this.f5653a.f5709a;
+        Calendar a2 = w.a(bVar.f5634a.f5693a);
+        a2.add(2, S02);
+        kVar.f5660d = new o(a2);
+        Calendar a4 = w.a(bVar.f5634a.f5693a);
+        a4.add(2, S02);
+        a4.set(5, 1);
+        Calendar a5 = w.a(a4);
+        a5.get(2);
+        a5.get(1);
+        a5.getMaximum(7);
+        a5.getActualMaximum(5);
+        a5.getTimeInMillis();
+        long timeInMillis = a5.getTimeInMillis();
+        Locale locale = Locale.getDefault();
+        AtomicReference atomicReference = w.f5713a;
+        DateFormat instanceForSkeleton = DateFormat.getInstanceForSkeleton("yMMMM", locale);
+        instanceForSkeleton.setTimeZone(TimeZone.getTimeZone("UTC"));
+        instanceForSkeleton.setContext(DisplayContext.CAPITALIZATION_FOR_STANDALONE);
+        this.f5654b.setText(instanceForSkeleton.format(new Date(timeInMillis)));
+    }
+}