[android] - add realtime geojson example from gl-js (#6751)

1 files changed, 141 insertions, 0 deletions

diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/RealTimeGeoJsonActivity.java b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/RealTimeGeoJsonActivity.java
new file mode 100644
index 0000000000..debd44fb1f
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/RealTimeGeoJsonActivity.java
@@ -0,0 +1,141 @@
+package com.mapbox.mapboxsdk.testapp.activity.style;
+
+import android.os.Bundle;
+import android.os.Handler;
+import android.support.annotation.NonNull;
+import android.support.v7.app.ActionBar;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.util.Log;
+import android.view.MenuItem;
+
+import com.mapbox.mapboxsdk.constants.MapboxConstants;
+import com.mapbox.mapboxsdk.maps.MapView;
+import com.mapbox.mapboxsdk.maps.MapboxMap;
+import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
+import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
+import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
+import com.mapbox.mapboxsdk.testapp.R;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconImage;
+
+/**
+ * Use realtime GeoJSON data streams to move a symbol on your map
+ * <p>
+ * GL-native equivalent of https://www.mapbox.com/mapbox-gl-js/example/live-geojson/
+ * </p>
+ */
+public class RealTimeGeoJsonActivity extends AppCompatActivity implements OnMapReadyCallback {
+
+    private final static String ID_GEOJSON_LAYER = "wanderdrone";
+    private final static String ID_GEOJSON_SOURCE = ID_GEOJSON_LAYER;
+    private final static String URL_GEOJSON_SOURCE = "https://wanderdrone.appspot.com/";
+
+    private MapView mapView;
+    private MapboxMap mapboxMap;
+
+    private Handler handler;
+    private Runnable runnable;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_default);
+
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+
+        ActionBar actionBar = getSupportActionBar();
+        if (actionBar != null) {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+            actionBar.setDisplayShowHomeEnabled(true);
+        }
+
+        mapView = (MapView) findViewById(R.id.mapView);
+        mapView.onCreate(savedInstanceState);
+        mapView.getMapAsync(this);
+    }
+
+    @Override
+    public void onMapReady(@NonNull final MapboxMap map) {
+        mapboxMap = map;
+
+        // add source
+        try {
+            mapboxMap.addSource(new GeoJsonSource(ID_GEOJSON_SOURCE, new URL(URL_GEOJSON_SOURCE)));
+        }catch (MalformedURLException e){
+            Log.e(MapboxConstants.TAG, "Invalid URL", e);
+        }
+
+        // add layer
+        SymbolLayer layer = new SymbolLayer(ID_GEOJSON_LAYER, ID_GEOJSON_SOURCE);
+        layer.setProperties(iconImage("rocket-15"));
+        mapboxMap.addLayer(layer);
+
+        // loop refresh geojson
+        handler = new Handler();
+        runnable = new RefreshGeoJsonRunnable(mapboxMap, handler);
+        handler.postDelayed(runnable, 2000);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        mapView.onResume();
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        mapView.onPause();
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        handler.removeCallbacks(runnable);
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        mapView.onDestroy();
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        mapView.onSaveInstanceState(outState);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                onBackPressed();
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    private static class RefreshGeoJsonRunnable implements Runnable {
+
+        private MapboxMap mapboxMap;
+        private Handler handler;
+
+        RefreshGeoJsonRunnable(MapboxMap mapboxMap, Handler handler) {
+            this.mapboxMap = mapboxMap;
+            this.handler = handler;
+        }
+
+        @Override
+        public void run() {
+            ((GeoJsonSource) mapboxMap.getSource(ID_GEOJSON_SOURCE)).setUrl(URL_GEOJSON_SOURCE);
+            handler.postDelayed(this, 2000);
+        }
+    }
+}