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/o.java

@@ -0,0 +1,114 @@
+package com.google.android.material.datepicker;
+
+import android.icu.text.DateFormat;
+import android.icu.text.DisplayContext;
+import android.icu.util.TimeZone;
+import android.os.Parcel;
+import android.os.Parcelable;
+import java.util.Arrays;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.Locale;
+import java.util.concurrent.atomic.AtomicReference;
+
+/* loaded from: classes3.dex */
+public final class o implements Comparable, Parcelable {
+    public static final Parcelable.Creator<o> CREATOR = new D0.a(10);
+
+    /* renamed from: a, reason: collision with root package name */
+    public final Calendar f5693a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final int f5694b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public final int f5695c;
+
+    /* renamed from: d, reason: collision with root package name */
+    public final int f5696d;
+
+    /* renamed from: e, reason: collision with root package name */
+    public final int f5697e;
+
+    /* renamed from: f, reason: collision with root package name */
+    public final long f5698f;
+
+    /* renamed from: g, reason: collision with root package name */
+    public String f5699g;
+
+    public o(Calendar calendar) {
+        calendar.set(5, 1);
+        Calendar a2 = w.a(calendar);
+        this.f5693a = a2;
+        this.f5694b = a2.get(2);
+        this.f5695c = a2.get(1);
+        this.f5696d = a2.getMaximum(7);
+        this.f5697e = a2.getActualMaximum(5);
+        this.f5698f = a2.getTimeInMillis();
+    }
+
+    public static o a(int i, int i4) {
+        Calendar c4 = w.c(null);
+        c4.set(1, i);
+        c4.set(2, i4);
+        return new o(c4);
+    }
+
+    public static o b(long j4) {
+        Calendar c4 = w.c(null);
+        c4.setTimeInMillis(j4);
+        return new o(c4);
+    }
+
+    public final String c() {
+        if (this.f5699g == null) {
+            long timeInMillis = this.f5693a.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.f5699g = instanceForSkeleton.format(new Date(timeInMillis));
+        }
+        return this.f5699g;
+    }
+
+    @Override // java.lang.Comparable
+    public final int compareTo(Object obj) {
+        return this.f5693a.compareTo(((o) obj).f5693a);
+    }
+
+    public final int d(o oVar) {
+        if (!(this.f5693a instanceof GregorianCalendar)) {
+            throw new IllegalArgumentException("Only Gregorian calendars are supported.");
+        }
+        return (oVar.f5694b - this.f5694b) + ((oVar.f5695c - this.f5695c) * 12);
+    }
+
+    @Override // android.os.Parcelable
+    public final int describeContents() {
+        return 0;
+    }
+
+    public final boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof o)) {
+            return false;
+        }
+        o oVar = (o) obj;
+        return this.f5694b == oVar.f5694b && this.f5695c == oVar.f5695c;
+    }
+
+    public final int hashCode() {
+        return Arrays.hashCode(new Object[]{Integer.valueOf(this.f5694b), Integer.valueOf(this.f5695c)});
+    }
+
+    @Override // android.os.Parcelable
+    public final void writeToParcel(Parcel parcel, int i) {
+        parcel.writeInt(this.f5695c);
+        parcel.writeInt(this.f5694b);
+    }
+}