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Initial commit: Norwegian emergency shelter finder app

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Android app (Kotlin) that locates the nearest public shelter (tilfluktsrom)
in Norway. Designed for offline-first emergency use.

Features:
- Downloads and caches all 556 Norwegian shelter locations from Geonorge
- GPS-based nearest shelter finding with distance and bearing
- OSMDroid map with offline tile caching for surroundings
- Large directional compass arrow pointing to selected shelter
- Compass sensor integration for real-time direction updates
- Shows 3 nearest shelters with distance, capacity, and address
- Toggle between map view and compass/arrow view
- Auto-caches map tiles on first launch for offline use
- Weekly background data refresh with manual force-update
- i18n: Norwegian Bokmål, Nynorsk, and English

Technical:
- EPSG:25833 (UTM33N) → WGS84 coordinate conversion
- Haversine distance and bearing calculations
- Room database for shelter persistence
- Fused Location Provider for precise GPS
- Sensor fusion (rotation vector with accel+mag fallback) for compass

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Ole-Morten Duesund 2026-03-08 16:14:19 +01:00
commit 27cad094e7
44 changed files with 2222 additions and 0 deletions
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192
app/src/main/res/layout/activity_main.xml Normal file
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<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/background"
tools:context=".MainActivity">
<!-- Status bar at top -->
<LinearLayout
android:id="@+id/statusBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/status_bar_bg"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="8dp"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/statusText"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="@color/status_text"
android:textSize="12sp"
tools:text="@string/status_ready" />
<ImageButton
android:id="@+id/refreshButton"
android:layout_width="36dp"
android:layout_height="36dp"
android:background="?attr/selectableItemBackgroundBorderless"
android:contentDescription="@string/action_refresh"
android:src="@drawable/ic_refresh"
app:tint="@color/status_text" />
</LinearLayout>
<!-- Map view (main content) -->
<org.osmdroid.views.MapView
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="@id/statusBar"
app:layout_constraintBottom_toTopOf="@id/bottomSheet" />
<!-- Direction arrow overlay (shown when toggled) -->
<FrameLayout
android:id="@+id/compassContainer"
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="@color/compass_bg"
android:visibility="gone"
app:layout_constraintTop_toBottomOf="@id/statusBar"
app:layout_constraintBottom_toTopOf="@id/bottomSheet">
<no.naiv.tilfluktsrom.ui.DirectionArrowView
android:id="@+id/directionArrow"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<TextView
android:id="@+id/compassDistanceText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:layout_marginBottom="32dp"
android:textColor="@color/white"
android:textSize="48sp"
android:textStyle="bold"
tools:text="1.2 km" />
<TextView
android:id="@+id/compassAddressText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top|center_horizontal"
android:layout_marginTop="24dp"
android:textAlignment="center"
android:textColor="@color/white"
android:textSize="18sp"
tools:text="Storgata 1" />
</FrameLayout>
<!-- Toggle button: map <-> compass -->
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/toggleViewFab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:contentDescription="@string/action_toggle_view"
android:src="@drawable/ic_compass"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toTopOf="@id/bottomSheet"
app:backgroundTint="@color/shelter_primary"
app:tint="@color/white" />
<!-- Bottom sheet with shelter info -->
<LinearLayout
android:id="@+id/bottomSheet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/bottom_sheet_bg"
android:orientation="vertical"
android:padding="12dp"
android:elevation="8dp"
app:layout_constraintBottom_toBottomOf="parent">
<!-- Selected shelter summary -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">
<no.naiv.tilfluktsrom.ui.DirectionArrowView
android:id="@+id/miniArrow"
android:layout_width="48dp"
android:layout_height="48dp" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginStart="12dp"
android:orientation="vertical">
<TextView
android:id="@+id/selectedShelterAddress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/text_primary"
android:textSize="16sp"
android:textStyle="bold"
tools:text="Storgata 1" />
<TextView
android:id="@+id/selectedShelterDetails"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/text_secondary"
android:textSize="13sp"
tools:text="1.2 km - 400 plasser - Rom 776" />
</LinearLayout>
</LinearLayout>
<!-- Nearest shelters list -->
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/shelterList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:clipToPadding="false" />
</LinearLayout>
<!-- Loading overlay for initial data download -->
<FrameLayout
android:id="@+id/loadingOverlay"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/loading_bg"
android:clickable="true"
android:focusable="true"
android:visibility="gone">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:orientation="vertical">
<ProgressBar
android:id="@+id/loadingProgress"
android:layout_width="64dp"
android:layout_height="64dp"
android:indeterminate="true" />
<TextView
android:id="@+id/loadingText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:textColor="@color/white"
android:textSize="16sp"
tools:text="@string/loading_shelters" />
</LinearLayout>
</FrameLayout>
</androidx.constraintlayout.widget.ConstraintLayout>