Open Google Maps on Google devices

.idea/deploymentTargetDropDown.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetDropDown">
+    <runningDeviceTargetSelectedWithDropDown>
+      <Target>
+        <type value="RUNNING_DEVICE_TARGET" />
+        <deviceKey>
+          <Key>
+            <type value="VIRTUAL_DEVICE_PATH" />
+            <value value="$USER_HOME$/.android/avd/Nexus_4_API_30.avd" />
+          </Key>
+        </deviceKey>
+      </Target>
+    </runningDeviceTargetSelectedWithDropDown>
+    <timeTargetWasSelectedWithDropDown value="2022-02-23T20:43:47.864894Z" />
+  </component>
+</project>

app/src/main/AndroidManifest.xml

@@ -21,10 +21,13 @@
     package="it.danieleverducci.nextcloudmaps">
 
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
 
     <queries>
         <package android:name="com.nextcloud.client" />
+        <!-- To see if google maps is installed, as it needs a specific intent Uri) -->
+        <package android:name="com.google.android.apps.maps" />
     </queries>
 
     <application

app/src/main/java/it/danieleverducci/nextcloudmaps/activity/detail/GeofavoriteDetailActivity.java

@@ -161,7 +161,7 @@ public class GeofavoriteDetailActivity extends NextcloudMapsStyledActivity imple
             if (getIntent().getData() != null) {
                 // Opened by external generic intent: parse URI
                 try {
-                    double[] coords = GeoUriParser.parseUri(getIntent().getData());
+                    double[] coords = GeoUriParser.parseUri(getIntent().getData(), false);
                     mGeofavorite.setLat(coords[0]);
                     mGeofavorite.setLng(coords[1]);
                     mViewHolder.hideAccuracy();

app/src/main/java/it/danieleverducci/nextcloudmaps/activity/mappicker/MapPickerActivity.java

@@ -15,25 +15,19 @@ import android.view.inputmethod.InputMethodManager;
 import android.widget.Toast;
 
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.app.ActivityCompat;
-import androidx.preference.PreferenceManager;
 
 import org.osmdroid.api.IGeoPoint;
 import org.osmdroid.api.IMapController;
-import org.osmdroid.config.Configuration;
-import org.osmdroid.config.IConfigurationProvider;
 import org.osmdroid.events.MapListener;
 import org.osmdroid.events.ScrollEvent;
 import org.osmdroid.events.ZoomEvent;
 import org.osmdroid.util.GeoPoint;
 import org.osmdroid.views.CustomZoomButtonsController;
 import org.osmdroid.views.MapView;
-import org.osmdroid.views.Projection;
 
 import java.util.Locale;
 
-import it.danieleverducci.nextcloudmaps.BuildConfig;
 import it.danieleverducci.nextcloudmaps.R;
 import it.danieleverducci.nextcloudmaps.activity.NextcloudMapsStyledActivity;
 import it.danieleverducci.nextcloudmaps.activity.detail.GeofavoriteDetailActivity;
@@ -64,7 +58,7 @@ public class MapPickerActivity extends NextcloudMapsStyledActivity {
             @Override
             public void onConfirmButtonPressed() {
                 double[] coords = mViewHolder.getCurrentCoordinates();
-                Uri geoUri = GeoUriParser.createUri(coords[0], coords[1], null);
+                Uri geoUri = GeoUriParser.createGeoUri(coords[0], coords[1], null);
                 Intent i = new Intent(MapPickerActivity.this, GeofavoriteDetailActivity.class);
                 i.setData(geoUri);
                 startActivity(i);

app/src/main/java/it/danieleverducci/nextcloudmaps/model/Geofavorite.java

@@ -164,7 +164,10 @@ public class Geofavorite implements Serializable {
     }
 
     public Uri getGeoUri() {
-        return GeoUriParser.createUri(this.lat, this.lng, this.name);
+        return GeoUriParser.createGeoUri(this.lat, this.lng, this.name);
+    }
+    public Uri getGmapsUri() {
+        return GeoUriParser.createGmapsUri(this.lat, this.lng);
     }
 
     public boolean valid() {

app/src/main/java/it/danieleverducci/nextcloudmaps/utils/GeoUriParser.java

@@ -10,35 +10,79 @@ import it.danieleverducci.nextcloudmaps.model.Geofavorite;
 
 public class GeoUriParser {
     private static final Pattern PATTERN_GEO = Pattern.compile("geo:(-?[\\d.]+),(-?[\\d.]+)");
+    // Try to match not only geoUri but also Google Maps Uri
+    private static final Pattern PATTERN_BROAD = Pattern.compile(
+        "(?:&query=|&center=|geo:)(-?\\d{1,2}\\.\\d{1,10})(?:,|%2C)(-?\\d{1,3}\\.\\d{1,10})"
+    );
 
-    public static double[] parseUri(Uri uri) throws IllegalArgumentException {
+    /**
+     * Parses an URI into latitude and longitude
+     * @param uri to parse
+     * @param strict if true, the uri must be a valid geo: uri, otherwise a broader check is applied to include other uris, like Google Maps ones
+     * @return the parsed coordinates in an array [lat,lon]
+     * @throws IllegalArgumentException if the url could not be parsed
+     */
+    public static double[] parseUri(Uri uri, boolean strict) throws IllegalArgumentException {
         if (uri == null)
             throw new IllegalArgumentException("no uri");
 
-        Matcher m = PATTERN_GEO.matcher(uri.toString());
+        // Try to extract coordinates in uri string with regexp
-        if (m.find() && m.groupCount() == 2) {
+        Pattern pattern = strict ? PATTERN_GEO : PATTERN_BROAD;
+        Matcher m = pattern.matcher(uri.toString());
+        if (!m.find() || m.groupCount() != 2)
+            throw new IllegalArgumentException("unable to parse uri: unable to find coordinates in uri");
+
+        // Obtain coordinates from regexp result
         String sLat = m.group(1);
         String sLon = m.group(2);
+        double[] coords = null;
         try {
-                return new double[]{Double.parseDouble(sLat), Double.parseDouble(sLon)};
+            // Check coordinates are numeric
+            coords = new double[]{Double.parseDouble(sLat), Double.parseDouble(sLon)};
         } catch (NumberFormatException e) {
-                throw new IllegalArgumentException("unable to parse uri");
+            throw new IllegalArgumentException("unable to parse uri: coordinates are not double");
-            }
-        } else {
-            throw new IllegalArgumentException("unable to parse uri");
-        }
         }
 
-    public static Uri createUri(double lat, double lon, String name) {
+        // Check coordinates validity
-        // Check coords validity
+        String error = checkCoordsValidity(coords[0], coords[1]);
-        if (lon <= -180 || lon >= 180 )
+        if (error != null)
-            throw new IllegalArgumentException("Invalid longitude: " + lon);
+            throw new IllegalArgumentException(error);
-        if (lat <= -90 || lat >= 90)
+
-            throw new IllegalArgumentException("Invalid latitude: " + lat);
+        return coords;
+    }
+
+    public static Uri createGeoUri(double lat, double lon, String name) {
+        String error = checkCoordsValidity(lat, lon);
+        if (error != null)
+            throw new IllegalArgumentException(error);
 
         String uriStr = "geo:" + lat + "," + lon;
         if (name != null)
             uriStr += "(" + name + ")";
         return Uri.parse(uriStr);
     }
+
+    public static Uri createGmapsUri(double lat, double lon) {
+        String error = checkCoordsValidity(lat, lon);
+        if (error != null)
+            throw new IllegalArgumentException(error);
+
+        String uriStr = "https://www.google.com/maps/search/?api=1&query=" + lat + "," + lon;
+        return Uri.parse(uriStr);
+    }
+
+    /**
+     * Checks a latitude/longitude is valid
+     * @param lat latitude
+     * @param lon longitude
+     * @return null if valid, a string containing an error otherwise
+     */
+    private static String checkCoordsValidity(double lat, double lon) {
+        // Check coords validity
+        if (lon <= -180 || lon >= 180 )
+            return "Invalid longitude: " + lon;
+        if (lat <= -90 || lat >= 90)
+            return "Invalid latitude: " + lat;
+        return null;
+    }
 }

app/src/main/java/it/danieleverducci/nextcloudmaps/utils/GoogleMapsUri.java

@@ -1,33 +0,0 @@
-package it.danieleverducci.nextcloudmaps.utils;
-
-import android.content.Context;
-import android.content.pm.PackageManager;
-import android.net.Uri;
-
-/**
- * Google maps doesn't honor geouri standard, instead implements its own uri.
- * A geouri opens google maps, but the position is ignored, so it is needed to use gmaps own uri.
- * Utility to check if gmaps is installed and generate a gmaps uri
- */
-public class GoogleMapsUri {
-
-    public static boolean isGoogleMapsInstalled(Context context) {
-        try {
-            context.getPackageManager().getApplicationInfo("com.google.android.apps.maps", 0);
-            return true;
-        } catch (PackageManager.NameNotFoundException e) {
-            return false;
-        }
-    }
-
-    public static Uri createGmapsUri(double lat, double lon) {
-        // Check coords validity
-        if (lon <= -180 || lon >= 180 )
-            throw new IllegalArgumentException("Invalid longitude: " + lon);
-        if (lat <= -90 || lat >= 90)
-            throw new IllegalArgumentException("Invalid latitude: " + lat);
-
-        String uriStr = "https://www.google.com/maps/search/?api=1&query=" + lat + "," + lon;
-        return Uri.parse(uriStr);
-    }
-}

app/src/main/java/it/danieleverducci/nextcloudmaps/utils/IntentGenerator.java

@@ -2,6 +2,7 @@ package it.danieleverducci.nextcloudmaps.utils;
 
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.util.Log;
 
 import it.danieleverducci.nextcloudmaps.R;
@@ -22,7 +23,16 @@ public class IntentGenerator {
     public static Intent newGeoUriIntent(Context context, Geofavorite item) {
         Intent i = new Intent();
         i.setAction(Intent.ACTION_VIEW);
-        i.setData(item.getGeoUri());
+        i.setData(isGoogleMapsInstalled(context) ? item.getGmapsUri() : item.getGeoUri());
         return i;
     }
+    
+    public static boolean isGoogleMapsInstalled(Context context) {
+        try {
+            context.getPackageManager().getApplicationInfo("com.google.android.apps.maps", 0);
+            return true;
+        } catch (PackageManager.NameNotFoundException e) {
+            return false;
+        }
+    }
 }