[android] check for Mapbox#INSTANCE when initializing the MapView

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/Mapbox.java

@@ -180,4 +180,11 @@ static boolean isAccessTokenValid(@Nullable String accessToken) {
     accessToken = accessToken.trim().toLowerCase(MapboxConstants.MAPBOX_LOCALE);
     return accessToken.length() != 0 && (accessToken.startsWith("pk.") || accessToken.startsWith("sk."));
   }
+
+  /**
+   * Internal use. Check if the {@link Mapbox#INSTANCE} is present.
+   */
+  public static boolean hasInstance() {
+    return INSTANCE != null;
+  }
 }

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java

@@ -26,6 +26,7 @@
 import com.mapbox.mapboxsdk.R;
 import com.mapbox.mapboxsdk.annotations.Annotation;
 import com.mapbox.mapboxsdk.constants.MapboxConstants;
+import com.mapbox.mapboxsdk.exceptions.MapboxConfigurationException;
 import com.mapbox.mapboxsdk.location.LocationComponent;
 import com.mapbox.mapboxsdk.maps.renderer.MapRenderer;
 import com.mapbox.mapboxsdk.maps.renderer.glsurfaceview.GLSurfaceViewMapRenderer;
@@ -120,6 +121,10 @@ protected void initialize(@NonNull final Context context, @NonNull final MapboxM
       return;
     }
 
+    if (!Mapbox.hasInstance()) {
+      throw new MapboxConfigurationException();
+    }
+
     // hide surface until map is fully loaded #10990
     setForeground(new ColorDrawable(options.getForegroundLoadColor()));
 

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/renderer/MapRenderer.java

@@ -3,8 +3,9 @@
 import android.content.Context;
 import android.support.annotation.CallSuper;
 import android.support.annotation.Keep;
-
 import android.support.annotation.NonNull;
+
+import com.mapbox.mapboxsdk.LibraryLoader;
 import com.mapbox.mapboxsdk.log.Logger;
 import com.mapbox.mapboxsdk.maps.MapboxMap;
 import com.mapbox.mapboxsdk.storage.FileSource;
@@ -22,6 +23,10 @@
 @Keep
 public abstract class MapRenderer implements MapRendererScheduler {
 
+  static {
+    LibraryLoader.load();
+  }
+
   private static final String TAG = "Mbgl-MapRenderer";
 
   // Holds the pointer to the native peer after initialisation

platform/android/MapboxGLAndroidSDK/src/test/java/com/mapbox/mapboxsdk/MapboxTest.java

@@ -1,16 +1,29 @@
 package com.mapbox.mapboxsdk;
 
 import android.content.Context;
+import android.content.res.Resources;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.util.DisplayMetrics;
+
+import com.mapbox.mapboxsdk.exceptions.MapboxConfigurationException;
+import com.mapbox.mapboxsdk.maps.MapView;
+
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.ExpectedException;
 
 import static junit.framework.TestCase.assertNotNull;
 import static junit.framework.TestCase.assertSame;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.nullable;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
@@ -19,6 +32,9 @@ public class MapboxTest {
   private Context context;
   private Context appContext;
 
+  @Rule
+  public ExpectedException expectedException = ExpectedException.none();
+
   @Before
   public void before() {
     context = mock(Context.class);
@@ -66,9 +82,28 @@ public void testBlaBlaToken() {
     assertFalse(Mapbox.isAccessTokenValid("blabla"));
   }
 
+  @Test
+  public void testNoInstance() {
+    DisplayMetrics displayMetrics = mock(DisplayMetrics.class);
+    Resources resources = mock(Resources.class);
+    when(resources.getDisplayMetrics()).thenReturn(displayMetrics);
+    when(context.getResources()).thenReturn(resources);
+    TypedArray typedArray = mock(TypedArray.class);
+    when(context.obtainStyledAttributes(nullable(AttributeSet.class), any(int[].class), anyInt(), anyInt()))
+      .thenReturn(typedArray);
+
+    expectedException.expect(MapboxConfigurationException.class);
+    expectedException.expectMessage(
+      "\nUsing MapView requires calling Mapbox.getInstance(Context context, String accessToken) before "
+        + "inflating or creating the view. The access token parameter is required when using a Mapbox service."
+        + "\nPlease see https://www.mapbox.com/help/create-api-access-token/ to learn how to create one."
+        + "\nMore information in this guide https://www.mapbox.com/help/first-steps-android-sdk/#access-tokens."
+    );
+    new MapView(context);
+  }
+
   @After
   public void after() {
     MapboxInjector.clear();
   }
-
 }