From ccd2772c195ba65b37abec1ae4a8462eb7428dfc Mon Sep 17 00:00:00 2001
From: Tobrun <tobrun.van.nuland@gmail.com>
Date: Wed, 21 Nov 2018 11:25:23 +0100
Subject: [android] - add overlay example with custom drawing using paint and
 canvas

---
 .../src/main/AndroidManifest.xml                   | 11 +++
 .../activity/maplayout/OverlayMapActivity.kt       | 82 ++++++++++++++++++++++
 .../src/main/res/layout/activity_overlay.xml       | 13 ++++
 .../src/main/res/values/descriptions.xml           |  1 +
 .../src/main/res/values/titles.xml                 |  1 +
 5 files changed, 108 insertions(+)
 create mode 100644 platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/maplayout/OverlayMapActivity.kt
 create mode 100644 platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_overlay.xml

diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml
index d30265f18a..22ae7f9824 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml
@@ -739,6 +739,17 @@
                 android:name="android.support.PARENT_ACTIVITY"
                 android:value=".activity.FeatureOverviewActivity" />
         </activity>
+        <activity
+                android:name=".activity.maplayout.OverlayMapActivity"
+                android:description="@string/description_overlay"
+                android:label="@string/activity_overlay">
+            <meta-data
+                    android:name="@string/category"
+                    android:value="@string/category_maplayout" />
+            <meta-data
+                    android:name="android.support.PARENT_ACTIVITY"
+                    android:value=".activity.FeatureOverviewActivity" />
+        </activity>
         <activity
             android:name=".activity.maplayout.LocalGlyphActivity"
             android:description="@string/description_local_glyph"
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/maplayout/OverlayMapActivity.kt b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/maplayout/OverlayMapActivity.kt
new file mode 100644
index 0000000000..8549ab8a60
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/maplayout/OverlayMapActivity.kt
@@ -0,0 +1,82 @@
+package com.mapbox.mapboxsdk.testapp.activity.maplayout
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.graphics.*
+import android.os.Bundle
+import android.support.v7.app.AppCompatActivity
+import android.view.View
+import com.mapbox.mapboxsdk.testapp.R
+import kotlinx.android.synthetic.main.activity_overlay.*
+
+/**
+ * Test overlaying a Map with a View that uses a radial gradient shader.
+ */
+class OverlayMapActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_overlay)
+        mapView.onCreate(savedInstanceState)
+        parentView.addView(OverlayView(this))
+    }
+
+    override fun onStart() {
+        super.onStart()
+        mapView.onStart()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        mapView.onResume()
+    }
+
+    override fun onPause() {
+        super.onPause()
+        mapView.onPause()
+    }
+
+    override fun onStop() {
+        super.onStop()
+        mapView.onStop()
+    }
+
+    override fun onLowMemory() {
+        super.onLowMemory()
+        mapView.onLowMemory()
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        mapView.onDestroy()
+    }
+
+    override fun onSaveInstanceState(outState: Bundle?) {
+        super.onSaveInstanceState(outState)
+        outState?.let {
+            mapView.onSaveInstanceState(it)
+        }
+    }
+
+    class OverlayView(context: Context) : View(context) {
+
+        private lateinit var paint: Paint
+        
+        @SuppressLint("DrawAllocation") // only happens once
+        override fun onDraw(canvas: Canvas?) {
+            super.onDraw(canvas)
+
+            canvas?.let {
+                if (!::paint.isInitialized) {
+                    paint = Paint()
+                    paint.color = Color.BLACK
+                    paint.strokeWidth = 1.0f
+                    paint.style = Paint.Style.FILL_AND_STROKE
+                    paint.shader = RadialGradient(width / 2.0f, height / 2.0f,
+                            height / 3.0f, Color.TRANSPARENT, Color.BLACK, Shader.TileMode.CLAMP)
+                }
+                it.drawRect(0.0f, 0.0f, width.toFloat(), height.toFloat(), paint)
+            }
+        }
+    }
+}
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_overlay.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_overlay.xml
new file mode 100644
index 0000000000..915b0a2c5b
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_overlay.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:id="@+id/parentView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+    <com.mapbox.mapboxsdk.maps.MapView
+            android:id="@+id/mapView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"/>
+
+</android.support.constraint.ConstraintLayout>
\ No newline at end of file
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/descriptions.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/descriptions.xml
index ca54c954d4..7fdc4c1bea 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/descriptions.xml
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/descriptions.xml
@@ -63,6 +63,7 @@
     <string name="description_textureview_resize">Resize a map rendered on a TextureView</string>
     <string name="description_textureview_animate">Animate a map rendered on a TextureView</string>
     <string name="description_textureview_transparent">Enable a transparent surface on TextureView</string>
+    <string name="description_overlay">Blend an overlay on a map</string>
     <string name="description_grid_source">Example Custom Geometry Source</string>
     <string name="description_local_glyph">Suzhou using Droid Sans for Chinese glyphs</string>
     <string name="description_hillshade">Example raster-dem source and hillshade layer</string>
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/titles.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/titles.xml
index f73bcc147d..3345c8db4e 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/titles.xml
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/titles.xml
@@ -63,6 +63,7 @@
     <string name="activity_textureview_resize">TextureView resize</string>
     <string name="activity_textureview_animate">TextureView animation</string>
     <string name="activity_textureview_transparent">TextureView transparent background</string>
+    <string name="activity_overlay">Map overlay</string>
     <string name="activity_grid_source">Grid Source</string>
     <string name="activity_local_glyph">Local CJK glyph generation</string>
     <string name="activity_hillshade">Hillshade</string>
-- 
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