We can now recognise iBeacons (need to check how correct this is)

res/layout/list_item_device.xml

@@ -17,52 +17,66 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:orientation="vertical" >
+    android:gravity="center_vertical"
+    android:orientation="horizontal" >
 
-    <TextView
+    <ImageView
-        android:id="@+id/device_name"
+        android:id="@+id/device_icon"
-        android:layout_width="match_parent"
+        android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:textSize="24sp" />
+        android:paddingRight="5dp"
+        android:src="@drawable/ic_bluetooth" />
 
     <LinearLayout
-        android:layout_width="fill_parent"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="horizontal" >
+        android:orientation="vertical" >
 
         <TextView
-            android:layout_width="wrap_content"
+            android:id="@+id/device_name"
+            android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:paddingRight="5dp"
+            android:textSize="24sp" />
-            android:text="MAC:"
-            android:textSize="12sp" />
 
-        <TextView
+        <LinearLayout
-            android:id="@+id/device_address"
+            android:layout_width="fill_parent"
-            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:textSize="12sp"
+            android:orientation="horizontal" >
-            android:typeface="monospace" />
 
-        <TextView
+            <TextView
-            android:layout_width="wrap_content"
+                android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+                android:layout_height="wrap_content"
-            android:text=" - "
+                android:paddingRight="5dp"
-            android:textSize="12sp" />
+                android:text="MAC:"
+                android:textSize="12sp" />
 
-        <TextView
+            <TextView
-            android:layout_width="wrap_content"
+                android:id="@+id/device_address"
-            android:layout_height="wrap_content"
+                android:layout_width="wrap_content"
-            android:paddingRight="5dp"
+                android:layout_height="wrap_content"
-            android:text="RSSI:"
+                android:textSize="12sp"
-            android:textSize="12sp" />
+                android:typeface="monospace" />
 
-        <TextView
+            <TextView
-            android:id="@+id/device_rssi"
+                android:layout_width="wrap_content"
-            android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
-            android:layout_height="wrap_content"
+                android:text=" - "
-            android:paddingRight="5dp"
+                android:textSize="12sp" />
-            android:textSize="12sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:paddingRight="5dp"
+                android:text="RSSI:"
+                android:textSize="12sp" />
+
+            <TextView
+                android:id="@+id/device_rssi"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:paddingRight="5dp"
+                android:textSize="12sp" />
+        </LinearLayout>
     </LinearLayout>
 
 </LinearLayout>

src/uk/co/alt236/btlescan/activities/DetailsActivity.java

@@ -4,8 +4,8 @@ import java.util.Collection;
 
 import uk.co.alt236.btlescan.R;
 import uk.co.alt236.btlescan.containers.AdRecord;
-import uk.co.alt236.btlescan.containers.AdRecordUtils;
 import uk.co.alt236.btlescan.containers.BluetoothLeDevice;
+import uk.co.alt236.btlescan.util.AdRecordUtils;
 import android.app.Activity;
 import android.os.Bundle;
 import android.widget.TextView;

src/uk/co/alt236/btlescan/activities/MainActivity.java

@@ -31,11 +31,6 @@ public class MainActivity extends ListActivity {
 		public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
 
 			final BluetoothLeDevice deviceLe = new BluetoothLeDevice(device, rssi, scanRecord);
-			//			Log.d("TAG", "~ New BT Device: " + deviceLe);
-			//			final Collection<AdRecord> adRecords = deviceLe.getAdRecordStore().getRecordsAsCollection();
-			//			for(final AdRecord record : adRecords){
-			//				Log.d("TAG", "~ Has Record: " + record.getType() + ": '" + record.getHumanReadableType() +"', data: '"+ AdRecordUtils.getRecordDataAsString(record) + "'");
-			//			}
 
 			runOnUiThread(new Runnable() {
 				@Override

src/uk/co/alt236/btlescan/adapters/LeDeviceListAdapter.java

@@ -5,11 +5,13 @@ import java.util.List;
 
 import uk.co.alt236.btlescan.R;
 import uk.co.alt236.btlescan.containers.BluetoothLeDevice;
+import uk.co.alt236.btlescan.util.ManufacturerDataParser;
 import android.app.Activity;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
+import android.widget.ImageView;
 import android.widget.TextView;
  // Adapter for holding devices found through scanning.
    public class LeDeviceListAdapter extends BaseAdapter {
@@ -64,6 +66,7 @@ import android.widget.TextView;
                 viewHolder.deviceAddress = (TextView) view.findViewById(R.id.device_address);
                 viewHolder.deviceName = (TextView) view.findViewById(R.id.device_name);
                 viewHolder.deviceRssi = (TextView) view.findViewById(R.id.device_rssi);
+                viewHolder.deviceIcon = (ImageView) view.findViewById(R.id.device_icon);
                 view.setTag(viewHolder);
             } else {
                 viewHolder = (ViewHolder) view.getTag();
@@ -78,6 +81,14 @@ import android.widget.TextView;
                 viewHolder.deviceName.setText(R.string.unknown_device);
             }
 
+            final boolean isIBeacon = ManufacturerDataParser.isThisAnIBeacon(device);
+
+            if (isIBeacon){
+            	viewHolder.deviceIcon.setImageResource(R.drawable.ic_bluetooth_ibeacon);
+            } else {
+            	viewHolder.deviceIcon.setImageResource(R.drawable.ic_bluetooth);
+            }
+
             viewHolder.deviceAddress.setText(device.getAddress());
             viewHolder.deviceRssi.setText(String.valueOf(device.getRssi()) + "db");
             return view;
@@ -87,6 +98,7 @@ import android.widget.TextView;
             TextView deviceName;
             TextView deviceAddress;
             TextView deviceRssi;
+            ImageView deviceIcon;
         }
 
     }

src/uk/co/alt236/btlescan/containers/AdRecord.java

@@ -32,6 +32,10 @@ public final class AdRecord implements Parcelable{
 	//	c5 # The 2's complement of the calibrated Tx Power
 
 
+	private static final String PARCEL_RECORD_DATA = "record_data";
+	private static final String PARCEL_RECORD_TYPE = "record_type";
+	private static final String PARCEL_RECORD_LENGTH = "record_length";
+
 	/**
 	 * General FLAGS
 	 *
@@ -149,9 +153,9 @@ public final class AdRecord implements Parcelable{
 
 	public AdRecord(Parcel in) {
 		final Bundle b = in.readBundle(getClass().getClassLoader());
-		mLength = b.getInt("record_length");
+		mLength = b.getInt(PARCEL_RECORD_LENGTH);
-		mType = b.getInt("record_type");
+		mType = b.getInt(PARCEL_RECORD_TYPE);
-		mData = b.getByteArray("record_data");
+		mData = b.getByteArray(PARCEL_RECORD_DATA);
 	}
 
 	@Override
@@ -184,9 +188,9 @@ public final class AdRecord implements Parcelable{
 	public void writeToParcel(Parcel parcel, int arg1) {
 		final Bundle b = new Bundle(getClass().getClassLoader());
 
-		b.putInt("record_length", mLength);
+		b.putInt(PARCEL_RECORD_LENGTH, mLength);
-		b.putInt("record_type", mType);
+		b.putInt(PARCEL_RECORD_TYPE, mType);
-		b.putByteArray("record_data", mData);
+		b.putByteArray(PARCEL_RECORD_DATA, mData);
 
 		parcel.writeBundle(b);
 	}

src/uk/co/alt236/btlescan/containers/AdRecordStore.java

@@ -4,6 +4,7 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 
+import uk.co.alt236.btlescan.util.AdRecordUtils;
 import android.os.Bundle;
 import android.os.Parcel;
 import android.os.Parcelable;

src/uk/co/alt236/btlescan/containers/BluetoothLeDevice.java

@@ -2,6 +2,7 @@ package uk.co.alt236.btlescan.containers;
 
 import java.util.Arrays;
 
+import uk.co.alt236.btlescan.util.AdRecordUtils;
 import android.bluetooth.BluetoothClass;
 import android.bluetooth.BluetoothDevice;
 import android.os.Bundle;

src/uk/co/alt236/btlescan/containers/ManufacturerDataIBeacon.java

@@ -0,0 +1,28 @@
+package uk.co.alt236.btlescan.containers;
+
+public final class ManufacturerDataIBeacon {
+	private final byte[] mData;
+	private final int mTxPower;
+
+	public ManufacturerDataIBeacon(byte[] data){
+		mData = data;
+		mTxPower = 0;
+	}
+
+
+	// Code taken from: http://stackoverflow.com/questions/20416218/understanding-ibeacon-distancing
+	protected static double calculateAccuracy(int txPower, double rssi) {
+		if (rssi == 0) {
+			return -1.0; // if we cannot determine accuracy, return -1.
+		}
+
+		double ratio = rssi*1.0/txPower;
+		if (ratio < 1.0) {
+			return Math.pow(ratio,10);
+		}
+		else {
+			double accuracy =  (0.89976)*Math.pow(ratio,7.7095) + 0.111;
+			return accuracy;
+		}
+	}
+}

src/uk/co/alt236/btlescan/util/AdRecordUtils.java

@@ -1,4 +1,4 @@
-package uk.co.alt236.btlescan.containers;
+package uk.co.alt236.btlescan.util;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -7,6 +7,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import uk.co.alt236.btlescan.containers.AdRecord;
 import android.annotation.SuppressLint;
 import android.util.SparseArray;
 

src/uk/co/alt236/btlescan/util/ManufacturerDataParser.java

@@ -0,0 +1,36 @@
+package uk.co.alt236.btlescan.util;
+
+import uk.co.alt236.btlescan.containers.BluetoothLeDevice;
+
+public class ManufacturerDataParser {
+	private static final byte[] SCAN_RECORD_PREFIX_IBEACON_1 = new byte[]{0x02, 0x01, 0x1A, 0x1A, (byte) 0xFF, 0x4C, 0x00, 0x02, 0x15};
+	private static final byte[] SCAN_RECORD_PREFIX_IBEACON_2 = new byte[]{0x02, 0x01, 0x06, 0x1A, (byte) 0xFF, 0x4C, 0x00, 0x02, 0x15};
+
+	public static boolean isThisAnIBeacon(BluetoothLeDevice device){
+		return isThisAnIBeacon(device.getScanRecord());
+	}
+
+	public static boolean isThisAnIBeacon(byte[] scanRecord){
+		if(doesArrayBeginWith(scanRecord, SCAN_RECORD_PREFIX_IBEACON_1)){
+			return true;
+		}
+
+		if(doesArrayBeginWith(scanRecord, SCAN_RECORD_PREFIX_IBEACON_2)){
+			return true;
+		}
+
+		return false;
+	}
+
+	private static boolean doesArrayBeginWith(byte[] array, byte[] prefix){
+		if(array.length < prefix.length){return false;}
+
+		for(int i = 0; i < prefix.length; i++){
+			if(array[i] != prefix[i]){
+				return false;
+			}
+		}
+
+		return true;
+	}
+}