Minor change, README update

README.md

@@ -1,4 +1,37 @@
 ArduinoPixel
 ============
 
-An Android app that communicates with an Arduino Web server to control a NeoPixel LED strip.
+This project consists of two pieces. The first piece is an **Arduino sketch** that implements a **Web Server** and offers an **API** for controlling a [NeoPixel LED Strip](http://www.adafruit.com/products/1138). The second piece is an **Android app**, `ArduinoPixel`, that connects to the **Arduino Web Server** and sends **commands** to control the **color** and the **on/off state** of the **LED strip**.
+
+<br>
+![promo](http://i859.photobucket.com/albums/ab154/lampnick67/promo__zpsbbabfe87.png)
+<br><br>
+
+The **Arduino sketch** is also available at [codebender](https://codebender.cc/sketch:31742). You can **clone** the project, **update** the controller and network parameters, and **upload** it straight to your **Arduino Ethernet**, or any other Arduino compatible board w/ an Ethernet Shield.
+
+The **Android application** is available on [Google Play](https://play.google.com/store/apps/details?id=ln.paign10.arduinopixel). **Install** the app to your phone or tablet, **configure** the network parameters you set earlier in the Arduino sketch, and you are **ready** to go. You can watch a demo on [YouTube](http://www.youtube.com/watch?v=AuqOQ0Pe_c0).
+
+API
+---
+
+The server accepts the following HTTP requests:
+* A `GET` request to `/`. It responds with a **Hello from Arduino Server** message.
+* A `GET` request to `/strip/status/`. It responds with **ON** or **OFF** for the on/off state of the strip.
+* A `GET` request to `/strip/color/`. It responds with a **JSON representation** of the strip's **color**, e.g. `{"r":92,"g":34,"b":127}`.
+* A `PUT` request to `/strip/status/on`. It **turns** the strip **on**.
+* A `PUT` request to `/strip/status/off`. It **turns** the strip **off**.
+* A `PUT` request to `/strip/color/`. It **changes** the strip's **color**. The **data** are delivered as a **JSON object**, e.g. `{"r":48,"g":254,"b":176}`.
+
+
+Testing
+-------
+
+The **Android app** was tested on a tablet with Android v`4.1.1`.
+
+
+Attribution
+-----------
+
+The **Android app** makes use of **Piotr Adamus'** [ColorPicker](https://github.com/chiralcode/Android-Color-Picker) view.
+
+**Thank you Piotr**... with your **beautiful** work, you gave me the motivation I needed to attempt this project.

android_app/ArduinoPixel/src/ln/paign10/arduinopixel/MainActivity.java

@@ -138,19 +138,27 @@ public void onCheckedChanged(CompoundButton buttonView,
 		});
 
 		mToast = Toast.makeText(MainActivity.this, "", Toast.LENGTH_SHORT);
-		
+
 		executor = Executors.newScheduledThreadPool(1);
 	}
 
 	@Override
 	protected void onResume() {
 		online = false;
-		if (isNetworkAvailable())
-			new HttpTask(Method.GET, URI_STATUS).execute();
+		// if (isNetworkAvailable())
+		new HttpTask(Method.GET, URI_STATUS).execute();
 
 		super.onResume();
 	}
 
+	@Override
+	protected void onPause() {
+		if (mCheckHost != null)
+			cancelExecutor();
+
+		super.onPause();
+	}
+
 	private class HttpTask extends AsyncTask<Integer, Void, String> {
 		private AndroidHttpClient mClient = AndroidHttpClient.newInstance("");
 		private Method reqMethod; // HTTP request method
@@ -280,7 +288,7 @@ private void parseJsonData(String result) {
 			String[] optNames = { "r", "g", "b" };
 			for (int i = 0; i < 3; ++i)
 				mColor[i] = responseObject.optInt(optNames[i]);
-			
+
 			mColorPicker.setColor(Color.rgb(mColor[0], mColor[1], mColor[2]));
 			mColorPicker.postInvalidate();
 
@@ -297,21 +305,22 @@ public static synchronized boolean isOnline() {
 
 	// Updates the power state of the LED strip
 	private void updatePowerState(boolean state) {
+		mState = state;
+
 		if (!isNetworkAvailable()) {
 			mToast.setText("Network Unavailable");
 			mToast.show();
 			online = false;
+			if (mCheckHost == null)
+				startExecutor();
 			return;
 		}
 
 		if (online) {
-			if (state) {
-				mState = true;
+			if (state)
 				new HttpTask(Method.PUT, URI_STATUS_ON).execute();
-			} else {
-				mState = false;
+			else
 				new HttpTask(Method.PUT, URI_STATUS_OFF).execute();
-			}
 		}
 	}