Android Samples: add Fragment example (#796)

vtm-android-example/src/org/oscim/android/test/MapFragment.java

@@ -0,0 +1,119 @@
+/*
+ * Copyright 2018-2020 devemux86
+ * Copyright 2020 Meibes
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.oscim.android.test;
+
+import android.app.Fragment;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.RelativeLayout;
+import org.oscim.android.MapView;
+import org.oscim.backend.CanvasAdapter;
+import org.oscim.layers.tile.buildings.BuildingLayer;
+import org.oscim.layers.tile.vector.VectorTileLayer;
+import org.oscim.layers.tile.vector.labeling.LabelLayer;
+import org.oscim.renderer.GLViewport;
+import org.oscim.scalebar.DefaultMapScaleBar;
+import org.oscim.scalebar.MapScaleBar;
+import org.oscim.scalebar.MapScaleBarLayer;
+import org.oscim.theme.VtmThemes;
+import org.oscim.tiling.source.mapfile.MapFileTileSource;
+
+import java.io.File;
+
+/**
+ * You'll need a map with filename berlin.map from download.mapsforge.org in device storage.
+ */
+@SuppressWarnings("deprecation")
+public class MapFragment extends Fragment {
+
+    private MapView mapView;
+
+    public static MapFragment newInstance() {
+        MapFragment instance = new MapFragment();
+
+        Bundle args = new Bundle();
+        instance.setArguments(args);
+        return instance;
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.fragment_map, container, false);
+    }
+
+    @Override
+    public void onViewCreated(View view, Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+
+        mapView = new MapView(getActivity());
+        RelativeLayout relativeLayout = view.findViewById(R.id.mapView);
+        relativeLayout.addView(mapView);
+
+        // Tile source
+        MapFileTileSource tileSource = new MapFileTileSource();
+        File file = new File(getActivity().getExternalFilesDir(null), "berlin.map");
+        tileSource.setMapFile(file.getAbsolutePath());
+
+        // Vector layer
+        VectorTileLayer tileLayer = mapView.map().setBaseMap(tileSource);
+
+        // Building layer
+        mapView.map().layers().add(new BuildingLayer(mapView.map(), tileLayer));
+
+        // Label layer
+        mapView.map().layers().add(new LabelLayer(mapView.map(), tileLayer));
+
+        // Render theme
+        mapView.map().setTheme(VtmThemes.DEFAULT);
+
+        // Scale bar
+        MapScaleBar mapScaleBar = new DefaultMapScaleBar(mapView.map());
+        MapScaleBarLayer mapScaleBarLayer = new MapScaleBarLayer(mapView.map(), mapScaleBar);
+        mapScaleBarLayer.getRenderer().setPosition(GLViewport.Position.BOTTOM_LEFT);
+        mapScaleBarLayer.getRenderer().setOffset(5 * CanvasAdapter.getScale(), 0);
+        mapView.map().layers().add(mapScaleBarLayer);
+
+        // Note: this map position is specific to Berlin area
+        mapView.map().setMapPosition(52.517037, 13.38886, 1 << 12);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (mapView != null) {
+            mapView.onResume();
+        }
+    }
+
+    @Override
+    public void onPause() {
+        if (mapView != null) {
+            mapView.onPause();
+        }
+        super.onPause();
+    }
+
+    @Override
+    public void onDestroyView() {
+        if (mapView != null) {
+            mapView.onDestroy();
+            mapView = null;
+        }
+        super.onDestroyView();
+    }
+}