Issue fluttercommunity#37. Updated docs due to NDK version prompt.

wakelock_plus/README.md

@@ -5,11 +5,23 @@
 [![Pub version](https://img.shields.io/pub/v/wakelock_plus.svg)](https://pub.dev/packages/wakelock_plus) [![GitHub stars](https://img.shields.io/github/stars/fluttercommunity/wakelock_plus.svg)](https://github.com/fluttercommunity/wakelock_plus)  
 A continuation of the original [wakelock](https://github.com/creativecreatorormaybenot/wakelock) Flutter Plugin written by [creativecreatorormaybenot](https://github.com/creativecreatorormaybenot) that allows you to keep the device screen awake, i.e. prevent the screen from sleeping.
 
----
-
 You can enable and toggle the screen wakelock, which prevents the screen from turning off 
 automatically.
 
+---
+
+## Table of Contents
+1. [Supported Platforms](#supported-platforms)
+2. [Usage](#usage)
+   1. [Implementation](#implementation)
+   2. [Ensure the `WidgetsBinding` is initialized](#ensure-the-widgetsbinding-is-initialized)
+   3. [Calling `WakelockPlus.enable()` in `main()`](#calling-wakelockplusenable-in-main)
+3. [Platform Specific Integration Instructions](#platform-specific-integration-instructions)
+   1. [Android](#android)
+4. [Learn More](#learn-more)
+
+---
+
 ## Supported Platforms
 
 | Platform | `wakelock_plus` support |
@@ -112,6 +124,28 @@ This is why you should instead prefer to enable the wakelock whenever components
 that require the screen to stay on are active. This can e.g. happen in the `build` method of your
 widget.
 
+## Platform Specific Integration Instructions
+
+### Android
+
+When building your app on Android and using this library, you may be prompted by the following:
+
+```bash
+One or more plugins require a higher Android NDK version.
+```
+
+If this occurs, simply add the NDK version specified in the error message in your `app` module's 
+`build.gradle` file's `android` closure. For example:
+
+```gradle
+android {
+    // Current version at the time of this writing.
+    // Use the version specified by the error message.
+    ndkVersion "25.1.8937393" 
+    //....
+}
+```
+
 ## Learn more
 
 If you want to learn more about how this plugin works, how to contribute, etc., you can read