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Tile roof construction calculator, with support for: Type of cover: gable or hip
Roof Tile Calculator — Android App (Java) Tile roof construction calculator, with support for: Type of cover: gable or hip System of measures: metric (m, cm) or English/imperial (ft, in) Interface language: Bulgarian, English, French, German, Spanish — selected inside the application (Spinner), regardless of the system device language, and is remembered between starts How the calculation works The roof is modeled with a common roof profile: Length of the slope (rafter)= (shorter side of base / 2) / cos(slope) Total roof area= 2 × (longer side × length of slope) — this formula is equally valid for both gable and symmetrical a four-pitched roof with the same slope on all slopes (provably geometrically: the "lost" area of the gables in the gable roof is exactly compensated by the additional triangular slopes at the four-pitched one). For a hipped roof, it is also shownthe length of the ridge (0 if the roof is a full pyramid): billo = |long side − short side| Effective area of one tile= (width − horizontal overlap) × (height − vertical overlap) Number of tiles= (total area / effective area) × (1 + waste reserve), rounded up — by default, the reserve is 15% for a four-pitched roof (more cutting at the ridges) and 10% for a two-pitched roof Estimated price= number of tiles × price of tile All internal calculations are performed in the metric system; when selected imperial system input values are converted to meters/centimeters before the calculation, and the results back to ft/sq ft for display. Functionalities Entering tile dimensions, slope and parameters, with units of measurement according to the selected system Optional: deduction of area for chimneys and dormers (number × width × height for each type), subtracted from the total area before calculating the number of tiles — the result card shows gross area, deduction and net area to cover when deduction is greater than 0 Visualization (`RoofView`): front view for a gable roof, plan (top) with ridge lines and the four slopes for a hipped roof Calculation history saved locally via SQLite (`DatabaseHelper`), displayed in the currently selected units of measurement and language Export history as CSV(`CsvExporter`) — "Export CSV" button in the History screen opens the system sharing dialog (email, Drive, Files, etc.) with a generated `.csv` file containing all saved calculations with all raw values in metric system Full localization in 5 languages (`values`, `values-bg`, `values-fr`, `values-de`, `values-es`) Project structure app/src/main/java/com/iigtechnology/rooftilecalculator/ ├── MainActivity.java — main screen: input, calculation, choices ├── RoofCalculation.java — model with formulas (metric, internal) ├── RoofView.java — custom View: gable elevation / hip plan ├── Units.java — metric ⇄ imperial conversions ├── LocaleHelper.java — implementing a selected language within the application ├── DatabaseHelper.java — SQLite history storage ├── CsvExporter.java — generate and share CSV with history └── HistoryActivity.java — list of previous calculations + export