Add basic API methods showPoint(s)OnMap

lib/src/main/java/app/organicmaps/api/OrganicMapsApi.java

@@ -0,0 +1,51 @@
+package app.organicmaps.api;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ActivityInfo;
+
+import java.util.ArrayList;
+
+public class OrganicMapsApi {
+
+    static final String PACKAGE_NAME = "app.organicmaps";
+
+    private OrganicMapsApi() {
+        // utility class
+    }
+
+    public static void showPointOnMap(final Activity activity, final double lat, final double lon, final String name) {
+        final ArrayList<Point> points = new ArrayList<>(1);
+        points.add(new Point(lat, lon, name));
+        showPointsOnMap(activity, name, points);
+    }
+
+    public static void showPointsOnMap(final Activity activity, final String name, final ArrayList<Point> points) {
+        final Intent intent = new MapRequest()
+                .setPoints(points)
+                .setAppName(name)
+                .toIntent();
+        sendRequest(activity, intent);
+    };
+
+    public static void sendRequest(final Activity caller, final Intent intent) {
+        if (isOrganicMapsInstalled(caller)) {
+            // Match activity for intent
+            final ActivityInfo aInfo = caller.getPackageManager().resolveActivity(intent, 0).activityInfo;
+            intent.setClassName(aInfo.packageName, aInfo.name);
+            caller.startActivity(intent);
+        } else {
+            new DownloadDialog(caller).show();
+        }
+    }
+
+    /**
+     * Detects if any version of OrganicMaps is installed on the device
+     */
+    public static boolean isOrganicMapsInstalled(final Context context) {
+        final Intent i = context.getPackageManager().getLaunchIntentForPackage(PACKAGE_NAME);
+        return i != null;
+    }
+
+}