[android] #4365 - add toolbar to Polygon example

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/annotation/PolygonActivity.java

@@ -2,7 +2,11 @@ package com.mapbox.mapboxsdk.testapp.activity.annotation;
 
 import android.graphics.Color;
 import android.os.Bundle;
+import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.MenuItem;
+import android.view.ViewGroup;
 
 import com.mapbox.mapboxsdk.annotations.PolygonOptions;
 import com.mapbox.mapboxsdk.camera.CameraPosition;
@@ -24,6 +28,16 @@ public class PolygonActivity extends AppCompatActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_polygon);
+
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+
+        ActionBar actionBar = getSupportActionBar();
+        if (actionBar != null) {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+            actionBar.setDisplayShowHomeEnabled(true);
+        }
 
         // configure inital map state
         MapboxMapOptions options = new MapboxMapOptions()
@@ -61,8 +75,8 @@ public class PolygonActivity extends AppCompatActivity {
             }
         });
 
-        // set as content view
-        setContentView(mapView);
+        // add to layout
+        ((ViewGroup) findViewById(R.id.container)).addView(mapView);
     }
 
     @Override
@@ -94,4 +108,15 @@ public class PolygonActivity extends AppCompatActivity {
         super.onLowMemory();
         mapView.onLowMemory();
     }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                onBackPressed();
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
 }

platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_polygon.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/container"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <android.support.v7.widget.Toolbar
+        android:id="@id/toolbar"
+        android:layout_width="match_parent"
+        android:layout_height="?attr/actionBarSize"
+        android:background="@color/primary"
+        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />
+
+</LinearLayout>

platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/ids.xml

@@ -3,5 +3,7 @@
     <item name="mapView" type="id" />
     <item name="fab" type="id" />
     <item name="imageView" type="id" />
+    <item name="toolbar" type="id" />
+    <item name="container" type="id" />
     <item name="item_click_support" type="id" />
 </resources>