1 files changed, 117 insertions, 0 deletions
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/GradientLineActivity.java b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/GradientLineActivity.java
new file mode 100644
index 0000000000..f980976bf9
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/GradientLineActivity.java
@@ -0,0 +1,117 @@
+package com.mapbox.mapboxsdk.testapp.activity.style;
+
+import android.graphics.Color;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import com.mapbox.mapboxsdk.maps.MapView;
+import com.mapbox.mapboxsdk.maps.MapboxMap;
+import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
+import com.mapbox.mapboxsdk.style.layers.LineLayer;
+import com.mapbox.mapboxsdk.style.sources.GeoJsonOptions;
+import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
+import com.mapbox.mapboxsdk.testapp.R;
+import com.mapbox.mapboxsdk.testapp.utils.ResourceUtils;
+import timber.log.Timber;
+
+import java.io.IOException;
+
+import static com.mapbox.mapboxsdk.style.expressions.Expression.interpolate;
+import static com.mapbox.mapboxsdk.style.expressions.Expression.lineProgress;
+import static com.mapbox.mapboxsdk.style.expressions.Expression.linear;
+import static com.mapbox.mapboxsdk.style.expressions.Expression.rgb;
+import static com.mapbox.mapboxsdk.style.expressions.Expression.stop;
+import static com.mapbox.mapboxsdk.style.layers.Property.LINE_CAP_ROUND;
+import static com.mapbox.mapboxsdk.style.layers.Property.LINE_JOIN_ROUND;
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineCap;
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineColor;
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineGradient;
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineJoin;
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineWidth;
+
+/**
+ * Activity showcasing applying a gradient coloring to a line layer.
+ */
+public class GradientLineActivity extends AppCompatActivity implements OnMapReadyCallback {
+
+  public static final String LINE_SOURCE = "gradient";
+  private MapboxMap mapboxMap;
+  private MapView mapView;
+
+  @Override
+  public void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.activity_gradient_line);
+
+    mapView = findViewById(R.id.mapView);
+    mapView.onCreate(savedInstanceState);
+    mapView.getMapAsync(this);
+  }
+
+  @Override
+  public void onMapReady(MapboxMap map) {
+    this.mapboxMap = map;
+
+    try {
+      String geoJson = ResourceUtils.readRawResource(GradientLineActivity.this, R.raw.test_line_gradient_feature);
+      mapboxMap.addSource(new GeoJsonSource(LINE_SOURCE, geoJson, new GeoJsonOptions().withLineMetrics(true)));
+      mapboxMap.addLayer(new LineLayer("gradient", LINE_SOURCE)
+        .withProperties(
+          lineGradient(interpolate(
+            linear(), lineProgress(),
+            stop(0f, rgb(0, 0, 255)),
+            stop(0.5f, rgb(0, 255, 0)),
+            stop(1f, rgb(255, 0, 0)))
+          ),
+          lineColor(Color.RED),
+          lineWidth(10.0f),
+          lineCap(LINE_CAP_ROUND),
+          lineJoin(LINE_JOIN_ROUND)
+        )
+      );
+    } catch (IOException exception) {
+      Timber.e(exception);
+    }
+  }
+
+  @Override
+  protected void onStart() {
+    super.onStart();
+    mapView.onStart();
+  }
+
+  @Override
+  protected void onResume() {
+    super.onResume();
+    mapView.onResume();
+  }
+
+  @Override
+  protected void onPause() {
+    super.onPause();
+    mapView.onPause();
+  }
+
+  @Override
+  protected void onStop() {
+    super.onStop();
+    mapView.onStop();
+  }
+
+  @Override
+  public void onSaveInstanceState(Bundle outState) {
+    super.onSaveInstanceState(outState);
+    mapView.onSaveInstanceState(outState);
+  }
+
+  @Override
+  public void onLowMemory() {
+    super.onLowMemory();
+    mapView.onLowMemory();
+  }
+
+  @Override
+  public void onDestroy() {
+    super.onDestroy();
+    mapView.onDestroy();
+  }
+}