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/e.java

@@ -0,0 +1,78 @@
+package com.google.android.material.datepicker;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.TextView;
+import com.adif.elcanomovil.R;
+import java.util.Calendar;
+import java.util.Locale;
+
+/* loaded from: classes3.dex */
+public final class e extends BaseAdapter {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final Calendar f5644a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final int f5645b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public final int f5646c;
+
+    public e() {
+        Calendar c4 = w.c(null);
+        this.f5644a = c4;
+        this.f5645b = c4.getMaximum(7);
+        this.f5646c = c4.getFirstDayOfWeek();
+    }
+
+    @Override // android.widget.Adapter
+    public final int getCount() {
+        return this.f5645b;
+    }
+
+    @Override // android.widget.Adapter
+    public final Object getItem(int i) {
+        int i4 = this.f5645b;
+        if (i >= i4) {
+            return null;
+        }
+        int i5 = i + this.f5646c;
+        if (i5 > i4) {
+            i5 -= i4;
+        }
+        return Integer.valueOf(i5);
+    }
+
+    @Override // android.widget.Adapter
+    public final long getItemId(int i) {
+        return 0L;
+    }
+
+    @Override // android.widget.Adapter
+    public final View getView(int i, View view, ViewGroup viewGroup) {
+        TextView textView = (TextView) view;
+        if (view == null) {
+            textView = (TextView) LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.mtrl_calendar_day_of_week, viewGroup, false);
+        }
+        int i4 = i + this.f5646c;
+        int i5 = this.f5645b;
+        if (i4 > i5) {
+            i4 -= i5;
+        }
+        Calendar calendar = this.f5644a;
+        calendar.set(7, i4);
+        textView.setText(calendar.getDisplayName(7, 4, textView.getResources().getConfiguration().locale));
+        textView.setContentDescription(String.format(viewGroup.getContext().getString(R.string.mtrl_picker_day_of_week_column_header), calendar.getDisplayName(7, 2, Locale.getDefault())));
+        return textView;
+    }
+
+    public e(int i) {
+        Calendar c4 = w.c(null);
+        this.f5644a = c4;
+        this.f5645b = c4.getMaximum(7);
+        this.f5646c = i;
+    }
+}