Add NorthType selection screen and enhance diagnostics info

app/build.gradle.kts

@@ -13,8 +13,8 @@ android {
         applicationId = "io.github.iso53.nothingcompass"
         minSdk = 27
         targetSdk = 36
-        versionCode = 3
-        versionName = "1.3.0"
+        versionCode = 4
+        versionName = "1.3.1"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }

app/src/main/AndroidManifest.xml

@@ -23,6 +23,9 @@
             </intent-filter>
         </activity>
         <activity android:name=".OptionsActivity" />
+        <activity
+            android:name=".NorthTypeActivity"
+            android:parentActivityName=".OptionsActivity" />
         <activity android:name=".AboutActivity" />
     </application>
 

app/src/main/java/io/github/iso53/nothingcompass/NorthTypeActivity.java

@@ -0,0 +1,79 @@
+package io.github.iso53.nothingcompass;
+
+import android.content.SharedPreferences;
+import android.graphics.drawable.AnimatedVectorDrawable;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.ImageView;
+
+import androidx.appcompat.app.AppCompatActivity;
+import com.google.android.material.materialswitch.MaterialSwitch;
+import androidx.appcompat.widget.Toolbar;
+import androidx.preference.PreferenceManager;
+
+import io.github.iso53.nothingcompass.preference.PreferenceConstants;
+
+public class NorthTypeActivity extends AppCompatActivity {
+
+    private ImageView northAnimation;
+    private MaterialSwitch switchTrueNorth;
+    private SharedPreferences prefs;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_north_type);
+
+        setupToolbar();
+
+        northAnimation = findViewById(R.id.north_animation);
+        switchTrueNorth = findViewById(R.id.switch_true_north);
+        prefs = PreferenceManager.getDefaultSharedPreferences(this);
+
+        boolean isTrueNorth = prefs.getBoolean(PreferenceConstants.TRUE_NORTH, false);
+        switchTrueNorth.setChecked(isTrueNorth);
+
+        switchTrueNorth.setOnCheckedChangeListener((buttonView, isChecked) -> {
+            prefs.edit().putBoolean(PreferenceConstants.TRUE_NORTH, isChecked).apply();
+        });
+    }
+
+    private void setupToolbar() {
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        if (getSupportActionBar() != null) {
+            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+        }
+        toolbar.setNavigationOnClickListener(v -> finish());
+
+        // Apply custom font to CollapsingToolbarLayout
+        com.google.android.material.appbar.CollapsingToolbarLayout collapsingToolbar = findViewById(R.id.collapseToolbar);
+        android.graphics.Typeface typeface = androidx.core.content.res.ResourcesCompat.getFont(this, R.font.ntype82headline);
+        if (typeface != null) {
+            collapsingToolbar.setExpandedTitleTypeface(typeface);
+            collapsingToolbar.setCollapsedTitleTypeface(typeface);
+        }
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        if (northAnimation.getDrawable() instanceof AnimatedVectorDrawable) {
+            ((AnimatedVectorDrawable) northAnimation.getDrawable()).start();
+        }
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        if (northAnimation.getDrawable() instanceof AnimatedVectorDrawable) {
+            ((AnimatedVectorDrawable) northAnimation.getDrawable()).stop();
+        }
+    }
+
+    @Override
+    public boolean onSupportNavigateUp() {
+        finish();
+        return true;
+    }
+}

app/src/main/java/io/github/iso53/nothingcompass/OptionsActivity.java

@@ -1,9 +1,13 @@
 package io.github.iso53.nothingcompass;
 
 import android.content.ActivityNotFoundException;
+import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.graphics.Typeface;
+import android.hardware.Sensor;
+import android.hardware.SensorManager;
+import android.location.LocationManager;
 import android.net.Uri;
 import android.os.Bundle;
 
@@ -72,7 +76,7 @@ private void setupRecyclerView() {
         items.add(new OptionItem(getString(R.string.item_high_precision), null,
                 R.drawable.precision, v -> showHighPrecisionSelectionDialog()));
         items.add(new OptionItem(getString(R.string.item_north_reference), null,
-                R.drawable.ic_compass, v -> showNorthReferenceSelectionDialog()));
+                R.drawable.ic_compass, v -> startActivity(new Intent(this, NorthTypeActivity.class))));
 
         // Category: App
         items.add(new OptionItem(getString(R.string.category_app)));
@@ -206,7 +210,8 @@ private void sendFeedbackEmail() {
                 + android.os.Build.VERSION.RELEASE + " (SDK " + android.os.Build.VERSION.SDK_INT + ")"
                 + "\nManufacturer: " + android.os.Build.MANUFACTURER + "\nModel: "
                 + android.os.Build.MODEL
-                + "\nProduct: " + android.os.Build.PRODUCT;
+                + "\nProduct: " + android.os.Build.PRODUCT
+                + getSensorInfo();
 
         Intent intent = new Intent(Intent.ACTION_SENDTO);
         intent.setData(Uri.parse("mailto:"));
@@ -222,6 +227,43 @@ private void sendFeedbackEmail() {
         }
     }
 
+    private String getSensorInfo() {
+        SensorManager sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
+        StringBuilder sb = new StringBuilder();
+        sb.append("\n\n--- Sensor Information ---");
+
+        if (sensorManager != null) {
+            List<Sensor> sensors = sensorManager.getSensorList(Sensor.TYPE_ALL);
+            sb.append("\nTotal Sensors: ").append(sensors.size());
+
+            // Focus on key sensors for a compass app
+            int[] keyTypes = {Sensor.TYPE_MAGNETIC_FIELD, Sensor.TYPE_ACCELEROMETER,
+                    Sensor.TYPE_GYROSCOPE, Sensor.TYPE_ROTATION_VECTOR};
+            String[] keyNames = {"Magnetometer", "Accelerometer", "Gyroscope", "Rotation Vector"};
+
+            for (int i = 0; i < keyTypes.length; i++) {
+                Sensor s = sensorManager.getDefaultSensor(keyTypes[i]);
+                sb.append("\n").append(keyNames[i]).append(": ");
+                if (s != null) {
+                    sb.append(s.getName()).append(" (").append(s.getVendor()).append(")");
+                } else {
+                    sb.append("Not Available");
+                }
+            }
+        }
+
+        LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
+        if (locationManager != null) {
+            sb.append("\n\n--- Location Status ---");
+            boolean gpsEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
+            boolean networkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
+            sb.append("\nGPS Provider: ").append(gpsEnabled ? "Enabled" : "Disabled");
+            sb.append("\nNetwork Provider: ").append(networkEnabled ? "Enabled" : "Disabled");
+        }
+
+        return sb.toString();
+    }
+
     private final androidx.activity.result.ActivityResultLauncher<String> requestPermissionLauncher = registerForActivityResult(
             new androidx.activity.result.contract.ActivityResultContracts.RequestPermission(),
             isGranted -> {

app/src/main/res/animator/anim_declination_rotation.xml

@@ -0,0 +1,10 @@
+<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
+    android:propertyName="rotation"
+    android:valueFrom="0"
+    android:valueTo="13"
+    android:valueType="floatType"
+    android:duration="1400"
+    android:startOffset="600"
+    android:interpolator="@android:anim/overshoot_interpolator"
+    android:repeatCount="infinite"
+    android:repeatMode="reverse" />

app/src/main/res/color/switch_thumb_color.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_enabled="false" android:color="@color/colorTertiary" />
+    <item android:state_checked="true"  android:color="@color/colorBackground" />
+    <item android:state_checked="false" android:color="@color/colorTertiary" />
+</selector>

app/src/main/res/color/switch_track_color.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_enabled="false" android:color="@android:color/transparent" />
+    <item android:state_checked="true"  android:color="@color/colorOnBackground" />
+    <item android:state_checked="false" android:color="@android:color/transparent" />
+</selector>

app/src/main/res/color/switch_track_decoration_color.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_enabled="false" android:color="@color/colorTertiary" />
+    <item android:state_checked="true"  android:color="@color/colorOnBackground" />
+    <item android:state_checked="false" android:color="@color/colorTertiary" />
+</selector>

app/src/main/res/drawable/avd_north_comparison.xml

@@ -0,0 +1,6 @@
+<animated-vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:drawable="@drawable/vd_compass_needles">
+    <target
+        android:name="true_needle_group"
+        android:animation="@animator/anim_declination_rotation" />
+</animated-vector>

app/src/main/res/drawable/vd_compass_needles.xml

@@ -0,0 +1,59 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="200dp"
+    android:height="200dp"
+    android:viewportWidth="200"
+    android:viewportHeight="200">
+    <group android:name="root_group">
+        <!-- Compass Outer Ring -->
+        <path
+            android:fillColor="@android:color/transparent"
+            android:pathData="M 100,100 m -85,0 a 85,85 0 1,1 170,0 a 85,85 0 1,1 -170,0"
+            android:strokeColor="@color/colorTertiary"
+            android:strokeWidth="1.5" />
+
+        <!-- Magnetic North North Group -->
+        <group
+            android:name="magnetic_needle_group"
+            android:pivotX="100"
+            android:pivotY="100">
+            <path
+                android:fillColor="@color/colorOnBackground"
+                android:pathData="M 100,28 L 107,98 L 100,112 L 93,98 Z" />
+            <path
+                android:fillColor="@color/colorSecondary"
+                android:pathData="M 100,112 L 107,98 L 100,172 L 93,98 Z" />
+            <!-- Magnetic Label "M" -->
+            <path
+                android:fillColor="@color/colorOnBackground"
+                android:pathData="M 97,18 L 100,23 L 103,18 L 104.5,18 L 104.5,26 L 103,26 L 103,20 L 100.5,24 L 99.5,24 L 97,20 L 97,26 L 95.5,26 L 95.5,18 Z" />
+        </group>
+
+        <!-- True North Needle Group -->
+        <group
+            android:name="true_needle_group"
+            android:pivotX="100"
+            android:pivotY="100"
+            android:rotation="0">
+            <path
+                android:fillColor="@color/colorSecondary"
+                android:pathData="M 100,34 L 105,98 L 100,110 L 95,98 Z" />
+            <path
+                android:fillColor="@color/colorTertiary"
+                android:pathData="M 100,110 L 105,98 L 100,166 L 95,98 Z" />
+            <!-- True Label "T" -->
+            <path
+                android:fillColor="@color/colorSecondary"
+                android:pathData="M 96,18 L 104,18 L 104,19.5 L 100.75,19.5 L 100.75,26 L 99.25,26 L 99.25,19.5 L 96,19.5 Z" />
+        </group>
+
+        <!-- Center Pivot Dot -->
+        <path
+            android:fillColor="@color/colorSecondary"
+            android:pathData="M 100,100 m -5,0 a 5,5 0 1,1 10,0 a 5,5 0 1,1 -10,0" />
+
+        <!-- Red Center Accent Dot -->
+        <path
+            android:fillColor="@color/colorPrimary"
+            android:pathData="M 100,100 m -2,0 a 2,2 0 1,1 4,0 a 2,2 0 1,1 -4,0" />
+    </group>
+</vector>