Provide default nav experience for singleInstance activity

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/feature/QueryRenderedFeaturesBoxCountActivity.java

@@ -4,21 +4,21 @@
 import android.graphics.RectF;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
+import android.view.MenuItem;
 import android.view.View;
 import android.widget.Toast;
-
 import com.google.gson.JsonElement;
 import com.mapbox.geojson.Feature;
 import com.mapbox.mapboxsdk.maps.MapView;
 import com.mapbox.mapboxsdk.maps.MapboxMap;
 import com.mapbox.mapboxsdk.maps.Style;
 import com.mapbox.mapboxsdk.testapp.R;
+import com.mapbox.mapboxsdk.testapp.utils.NavUtils;
+import timber.log.Timber;
 
 import java.util.List;
 import java.util.Map;
 
-import timber.log.Timber;
-
 /**
  * Test activity showcasing using the query rendered features API to count features in a rectangle.
  */
@@ -93,7 +93,7 @@ protected void onStart() {
 
     if (mapboxMap != null) {
       // Regression test for #14394
-      mapboxMap.queryRenderedFeatures(new PointF(0,0));
+      mapboxMap.queryRenderedFeatures(new PointF(0, 0));
     }
   }
 
@@ -132,4 +132,23 @@ public void onLowMemory() {
     super.onLowMemory();
     mapView.onLowMemory();
   }
+
+  @Override
+  public boolean onOptionsItemSelected(MenuItem item) {
+    switch (item.getItemId()) {
+      case android.R.id.home:
+        // activity uses singleInstance for testing purposes
+        // code below provides a default navigation when using the app
+        onBackPressed();
+        return true;
+    }
+    return super.onOptionsItemSelected(item);
+  }
+
+  @Override
+  public void onBackPressed() {
+    // activity uses singleInstance for testing purposes
+    // code below provides a default navigation when using the app
+    NavUtils.navigateHome(this);
+  }
 }

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/fragment/FragmentBackStackActivity.kt

@@ -7,39 +7,46 @@ import com.mapbox.mapboxsdk.maps.MapboxMap
 import com.mapbox.mapboxsdk.maps.Style
 import com.mapbox.mapboxsdk.maps.SupportMapFragment
 import com.mapbox.mapboxsdk.testapp.R
+import com.mapbox.mapboxsdk.testapp.utils.NavUtils
 import kotlinx.android.synthetic.main.activity_backstack_fragment.*
 
 /**
  * Test activity showcasing using the MapFragment API as part of a backstacked fragment.
  */
 class FragmentBackStackActivity : AppCompatActivity() {
 
-    private lateinit var mapFragment: SupportMapFragment
+  private lateinit var mapFragment: SupportMapFragment
 
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_backstack_fragment)
+  override fun onCreate(savedInstanceState: Bundle?) {
+    super.onCreate(savedInstanceState)
+    setContentView(R.layout.activity_backstack_fragment)
 
-        mapFragment = SupportMapFragment.newInstance()
-        mapFragment.getMapAsync { initMap(it) }
+    mapFragment = SupportMapFragment.newInstance()
+    mapFragment.getMapAsync { initMap(it) }
 
-        supportFragmentManager.beginTransaction().apply {
-            add(R.id.container, mapFragment)
-        }.commit()
+    supportFragmentManager.beginTransaction().apply {
+      add(R.id.container, mapFragment)
+    }.commit()
 
-        button.setOnClickListener { handleClick(it) }
-    }
-
-    private fun initMap(mapboxMap: MapboxMap) {
-        mapboxMap.setStyle(Style.SATELLITE) {
-            mapboxMap.setPadding(300, 300, 300, 300)
-        }
-    }
+    button.setOnClickListener { handleClick(it) }
+  }
 
-    private fun handleClick(button: View) {
-        supportFragmentManager.beginTransaction().apply {
-            replace(R.id.container, NestedViewPagerActivity.ItemAdapter.EmptyFragment())
-            addToBackStack("map_empty_fragment")
-        }.commit()
+  private fun initMap(mapboxMap: MapboxMap) {
+    mapboxMap.setStyle(Style.SATELLITE) {
+      mapboxMap.setPadding(300, 300, 300, 300)
     }
+  }
+
+  private fun handleClick(button: View) {
+    supportFragmentManager.beginTransaction().apply {
+      replace(R.id.container, NestedViewPagerActivity.ItemAdapter.EmptyFragment())
+      addToBackStack("map_empty_fragment")
+    }.commit()
+  }
+
+  override fun onBackPressed() {
+    // activity uses singleInstance for testing purposes
+    // code below provides a default navigation when using the app
+    NavUtils.navigateHome(this)
+  }
 }

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/maplayout/SimpleMapActivity.java

@@ -2,9 +2,11 @@
 
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
+import android.view.MenuItem;
 import com.mapbox.mapboxsdk.maps.MapView;
 import com.mapbox.mapboxsdk.maps.Style;
 import com.mapbox.mapboxsdk.testapp.R;
+import com.mapbox.mapboxsdk.testapp.utils.NavUtils;
 
 /**
  * Test activity showcasing a simple MapView without any MapboxMap interaction.
@@ -65,4 +67,23 @@ 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:
+        // activity uses singleInstance for testing purposes
+        // code below provides a default navigation when using the app
+        onBackPressed();
+        return true;
+    }
+    return super.onOptionsItemSelected(item);
+  }
+
+  @Override
+  public void onBackPressed() {
+    // activity uses singleInstance for testing purposes
+    // code below provides a default navigation when using the app
+    NavUtils.navigateHome(this);
+  }
 }

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/textureview/TextureViewDebugModeActivity.java

@@ -1,8 +1,10 @@
 package com.mapbox.mapboxsdk.testapp.activity.textureview;
 
+import android.view.MenuItem;
 import com.mapbox.mapboxsdk.maps.MapboxMapOptions;
 import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
 import com.mapbox.mapboxsdk.testapp.activity.maplayout.DebugModeActivity;
+import com.mapbox.mapboxsdk.testapp.utils.NavUtils;
 
 /**
  * Test activity showcasing the different debug modes and allows to cycle between the default map styles.
@@ -15,4 +17,24 @@ protected MapboxMapOptions setupMapboxMapOptions() {
     mapboxMapOptions.textureMode(true);
     return mapboxMapOptions;
   }
+
+  @Override
+  public boolean onOptionsItemSelected(MenuItem item) {
+    switch (item.getItemId()) {
+      case android.R.id.home:
+        // activity uses singleInstance for testing purposes
+        // code below provides a default navigation when using the app
+        onBackPressed();
+        return true;
+    }
+    return super.onOptionsItemSelected(item);
+  }
+
+
+  @Override
+  public void onBackPressed() {
+    // activity uses singleInstance for testing purposes
+    // code below provides a default navigation when using the app
+    NavUtils.navigateHome(this);
+  }
 }

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/utils/NavUtils.java

@@ -0,0 +1,14 @@
+package com.mapbox.mapboxsdk.testapp.utils;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.support.annotation.NonNull;
+import com.mapbox.mapboxsdk.testapp.activity.FeatureOverviewActivity;
+
+public class NavUtils {
+
+  public static void navigateHome(@NonNull Activity context) {
+    context.startActivity(new Intent(context, FeatureOverviewActivity.class));
+    context.finish();
+  }
+}