diff --git a/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidInputHandler.cs b/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidInputHandler.cs
index 5d45edd..0ba8327 100644
--- a/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidInputHandler.cs
+++ b/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidInputHandler.cs
@@ -5,7 +5,13 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android input.
 	/// </summary>
-	public abstract class AndroidInputHandler : InputHandler {
+	/// <typeparam name="TSelf">The type that inherits this class.</typeparam>
+	public abstract class AndroidInputHandler<TSelf> : InputHandler where TSelf : AndroidInputHandler<TSelf> {
+		/// <summary>
+		/// The instance of this class.
+		/// </summary>
+		protected static TSelf Instance { get; private set; }
+
 		readonly IntPtr _t_T;
 		static readonly jvalue[] _p_void = new jvalue[0];
 		readonly IntPtr _i_T;
@@ -22,8 +28,11 @@ namespace Cryville.Input.Unity.Android {
 		/// <exception cref="InvalidOperationException">An instance of this class have already been created.</exception>
 		/// <exception cref="NotSupportedException">Android input is not supported on the current device.</exception>
 		public AndroidInputHandler(string className) {
+			if (Instance != null)
+				throw new InvalidOperationException("AndroidInputHandler already created");
 			if (Environment.OSVersion.Platform != PlatformID.Unix)
 				throw new NotSupportedException("Android input is not supported on this device");
+			Instance = (TSelf)this;
 
 			JavaStaticMethods.Init();
 
@@ -40,7 +49,10 @@ namespace Cryville.Input.Unity.Android {
 			_m_T_activate = AndroidJNI.GetMethodID(_t_T, "activate", "()V");
 			_m_T_deactivate = AndroidJNI.GetMethodID(_t_T, "deactivate", "()V");
 
-			AndroidInputPoller.Instance.Register(AndroidJNI.CallIntMethod(_i_T, _m_T_getId, _p_void), this);
+			NativeMethods.AndroidInputProxy_RegisterCallback(
+				AndroidJNI.CallIntMethod(_i_T, _m_T_getId, _p_void),
+				Callback
+			);
 		}
 
 		/// <inheritdoc />
@@ -66,6 +78,6 @@ namespace Cryville.Input.Unity.Android {
 			}
 		}
 
-		internal abstract void OnFeed(int id, int action, long time, float x, float y, float z, float w);
+		private protected abstract AndroidInputProxy_Callback Callback { get; }
 	}
 }
diff --git a/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidInputPoller.cs b/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidInputPoller.cs
deleted file mode 100644
index 0da9218..0000000
--- a/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidInputPoller.cs
+++ /dev/null
@@ -1,34 +0,0 @@
-using System.Collections.Generic;
-using System.Threading;
-
-namespace Cryville.Input.Unity.Android {
-	internal class AndroidInputPoller {
-		static AndroidInputPoller m_instance;
-		public static AndroidInputPoller Instance {
-			get {
-				if (m_instance == null) m_instance = new AndroidInputPoller();
-				return m_instance;
-			}
-		}
-
-		readonly Thread _thread;
-		private AndroidInputPoller() {
-			_thread = new Thread(ThreadLogic) { IsBackground = true, Priority = ThreadPriority.AboveNormal };
-			_thread.Start();
-		}
-
-		readonly Dictionary<int, AndroidInputHandler> _handlers = new Dictionary<int, AndroidInputHandler>();
-		public void Register(int id, AndroidInputHandler handler) {
-			_handlers[id] = handler;
-		}
-
-		void ThreadLogic() {
-			while (true) {
-				while (NativeMethods.AndroidInputProxy_Poll(out var frame) == 1) {
-					_handlers[frame.hid].OnFeed(frame.id, frame.action, frame.time, frame.x, frame.y, frame.z, frame.w);
-				}
-				Thread.Sleep(1);
-			}
-		}
-	}
-}
diff --git a/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidInputPoller.cs.meta b/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidInputPoller.cs.meta
deleted file mode 100644
index 4ecf355..0000000
--- a/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidInputPoller.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 9b69004cd86eb0b42bfa2bcf3d1f7e87
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidSensorHandler.cs b/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidSensorHandler.cs
index 38402b0..7b0d056 100644
--- a/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidSensorHandler.cs
+++ b/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidSensorHandler.cs
@@ -1,3 +1,4 @@
+using Cryville.Common.Interop;
 using Cryville.Common.Logging;
 using System;
 using System.Text.RegularExpressions;
@@ -6,9 +7,9 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android sensor input.
 	/// </summary>
-	public abstract class AndroidSensorHandler : AndroidInputHandler {
+	public abstract class AndroidSensorHandler<TSelf> : AndroidInputHandler<TSelf> where TSelf : AndroidSensorHandler<TSelf> {
 		/// <summary>
-		/// Creates an instance of the <see cref="AndroidSensorHandler{TSelf}" /> class.
+		/// Creates an instance of the <see cref="AndroidSensorHandler" /> class.
 		/// </summary>
 		/// <param name="typeName">The name of the Java class nested in <c>world/cryville/input/unity/android/SensorProxy</c> that performs the low-level jobs.</param>
 		/// <param name="dimension">The dimension.</param>
@@ -38,11 +39,14 @@ namespace Cryville.Input.Unity.Android {
 			return JavaStaticMethods.SystemClock_elapsedRealtimeNanos() / 1e9;
 		}
 
-		internal override void OnFeed(int id, int action, long time, float x, float y, float z, float w) {
+		private protected sealed override AndroidInputProxy_Callback Callback { get { return OnFeed; } }
+
+		[MonoPInvokeCallback]
+		static void OnFeed(int id, int action, long time, float x, float y, float z, float w) {
 			try {
 				double timeSecs = time / 1e9;
-				Feed(0, id, new InputFrame(timeSecs, new InputVector(x, y, z, w)));
-				Batch(timeSecs);
+				Instance.Feed(0, id, new InputFrame(timeSecs, new InputVector(x, y, z, w)));
+				Instance.Batch(timeSecs);
 			}
 			catch (Exception ex) {
 				Shared.Logger.Log(4, "Input", "An error occurred while handling an Android sensor event: {0}", ex);
@@ -53,7 +57,7 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android accelerometer sensor input.
 	/// </summary>
-	public class AndroidAccelerometerHandler : AndroidSensorHandler {
+	public class AndroidAccelerometerHandler : AndroidSensorHandler<AndroidAccelerometerHandler> {
 		/// <summary>
 		/// Creates an instance of the <see cref="AndroidAccelerometerHandler" /> class.
 		/// </summary>
@@ -67,7 +71,7 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android accelerometer (uncalibrated) sensor input.
 	/// </summary>
-	public class AndroidAccelerometerUncalibratedHandler : AndroidSensorHandler {
+	public class AndroidAccelerometerUncalibratedHandler : AndroidSensorHandler<AndroidAccelerometerUncalibratedHandler> {
 		/// <summary>
 		/// Creates an instance of the <see cref="AndroidAccelerometerUncalibratedHandler" /> class.
 		/// </summary>
@@ -81,7 +85,7 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android game rotation vector sensor input.
 	/// </summary>
-	public class AndroidGameRotationVectorHandler : AndroidSensorHandler {
+	public class AndroidGameRotationVectorHandler : AndroidSensorHandler<AndroidGameRotationVectorHandler> {
 		/// <summary>
 		/// Creates an instance of the <see cref="AndroidGameRotationVectorHandler" /> class.
 		/// </summary>
@@ -95,7 +99,7 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android gravity sensor input.
 	/// </summary>
-	public class AndroidGravityHandler : AndroidSensorHandler {
+	public class AndroidGravityHandler : AndroidSensorHandler<AndroidGravityHandler> {
 		/// <summary>
 		/// Creates an instance of the <see cref="AndroidGravityHandler" /> class.
 		/// </summary>
@@ -109,7 +113,7 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android gyroscope sensor input.
 	/// </summary>
-	public class AndroidGyroscopeHandler : AndroidSensorHandler {
+	public class AndroidGyroscopeHandler : AndroidSensorHandler<AndroidGyroscopeHandler> {
 		/// <summary>
 		/// Creates an instance of the <see cref="AndroidGyroscopeHandler" /> class.
 		/// </summary>
@@ -121,9 +125,23 @@ namespace Cryville.Input.Unity.Android {
 		public override ReferenceCue ReferenceCue => _refCue;
 	}
 	/// <summary>
+	/// An <see cref="InputHandler" /> that handles Android gyroscope (uncalibrated) sensor input.
+	/// </summary>
+	public class AndroidGyroscopeUncalibratedHandler : AndroidSensorHandler<AndroidGyroscopeUncalibratedHandler> {
+		/// <summary>
+		/// Creates an instance of the <see cref="AndroidGyroscopeUncalibratedHandler" /> class.
+		/// </summary>
+		public AndroidGyroscopeUncalibratedHandler() : base("GyroscopeUncalibrated", 3) { }
+		static readonly ReferenceCue _refCue = new ReferenceCue {
+			PhysicalDimension = new PhysicalDimension { Time = -1 },
+		};
+		/// <inheritdoc />
+		public override ReferenceCue ReferenceCue => _refCue;
+	}
+	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android linear acceleration sensor input.
 	/// </summary>
-	public class AndroidLinearAccelerationHandler : AndroidSensorHandler {
+	public class AndroidLinearAccelerationHandler : AndroidSensorHandler<AndroidLinearAccelerationHandler> {
 		/// <summary>
 		/// Creates an instance of the <see cref="AndroidLinearAccelerationHandler" /> class.
 		/// </summary>
@@ -137,7 +155,7 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android magnetic field sensor input.
 	/// </summary>
-	public class AndroidMagneticFieldHandler : AndroidSensorHandler {
+	public class AndroidMagneticFieldHandler : AndroidSensorHandler<AndroidMagneticFieldHandler> {
 		/// <summary>
 		/// Creates an instance of the <see cref="AndroidMagneticFieldHandler" /> class.
 		/// </summary>
@@ -151,7 +169,7 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android magnetic field (uncalibrated) sensor input.
 	/// </summary>
-	public class AndroidMagneticFieldUncalibratedHandler : AndroidSensorHandler {
+	public class AndroidMagneticFieldUncalibratedHandler : AndroidSensorHandler<AndroidMagneticFieldUncalibratedHandler> {
 		/// <summary>
 		/// Creates an instance of the <see cref="AndroidMagneticFieldUncalibratedHandler" /> class.
 		/// </summary>
@@ -165,7 +183,7 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android rotation vector sensor input.
 	/// </summary>
-	public class AndroidRotationVectorHandler : AndroidSensorHandler {
+	public class AndroidRotationVectorHandler : AndroidSensorHandler<AndroidRotationVectorHandler> {
 		/// <summary>
 		/// Creates an instance of the <see cref="AndroidRotationVectorHandler" /> class.
 		/// </summary>
diff --git a/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidTouchHandler.cs b/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidTouchHandler.cs
index 26e88e3..5a5ebfa 100644
--- a/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidTouchHandler.cs
+++ b/Assets/Plugins/Android/Cryville.Input.Unity.Android/AndroidTouchHandler.cs
@@ -1,3 +1,4 @@
+using Cryville.Common.Interop;
 using Cryville.Common.Logging;
 using System;
 
@@ -5,7 +6,7 @@ namespace Cryville.Input.Unity.Android {
 	/// <summary>
 	/// An <see cref="InputHandler" /> that handles Android touch input.
 	/// </summary>
-	public class AndroidTouchHandler : AndroidInputHandler {
+	public class AndroidTouchHandler : AndroidInputHandler<AndroidTouchHandler> {
 		/// <summary>
 		/// Creates an instance of the <see cref="AndroidTouchHandler" /> class.
 		/// </summary>
@@ -39,16 +40,19 @@ namespace Cryville.Input.Unity.Android {
 			return JavaStaticMethods.SystemClock_uptimeMillis() / 1000.0;
 		}
 
-		internal override void OnFeed(int id, int action, long time, float x, float y, float z, float w) {
+		private protected override AndroidInputProxy_Callback Callback { get { return OnFeed; } }
+
+		[MonoPInvokeCallback]
+		static void OnFeed(int id, int action, long time, float x, float y, float z, float w) {
 			try {
 				double timeSecs = time / 1000.0;
 				if (action == -2) {
-					Batch(timeSecs);
+					Instance.Batch(timeSecs);
 				}
 				else {
-					Feed(0, id, new InputFrame(timeSecs, new InputVector(x, y)));
+					Instance.Feed(0, id, new InputFrame(timeSecs, new InputVector(x, y)));
 					if (action == 1 /*ACTION_UP*/ || action == 3 /*ACTION_CANCEL*/ || action == 6 /*ACTION_POINTER_UP*/)
-						Feed(0, id, new InputFrame(timeSecs));
+						Instance.Feed(0, id, new InputFrame(timeSecs));
 				}
 			}
 			catch (Exception ex) {
diff --git a/Assets/Plugins/Android/Cryville.Input.Unity.Android/NativeMethods.cs b/Assets/Plugins/Android/Cryville.Input.Unity.Android/NativeMethods.cs
index 306c078..5b3a2ec 100644
--- a/Assets/Plugins/Android/Cryville.Input.Unity.Android/NativeMethods.cs
+++ b/Assets/Plugins/Android/Cryville.Input.Unity.Android/NativeMethods.cs
@@ -1,19 +1,9 @@
 using System.Runtime.InteropServices;
 
 namespace Cryville.Input.Unity.Android {
-	struct ProxiedInputFrame {
-		public int hid;
-		public int id;
-		public int action;
-		public long time;
-		public float x;
-		public float y;
-		public float z;
-		public float w;
-	};
+	internal delegate void AndroidInputProxy_Callback(int id, int action, long time, float x, float y, float z, float w);
 	internal static class NativeMethods {
 		[DllImport("AndroidInputProxy")]
-		[PreserveSig]
-		public static extern int AndroidInputProxy_Poll(out ProxiedInputFrame frame);
+		public static extern void AndroidInputProxy_RegisterCallback(int hid, AndroidInputProxy_Callback cb);
 	}
 }
diff --git a/Assets/Plugins/Android/arm64-v8a/libAndroidInputProxy.so b/Assets/Plugins/Android/arm64-v8a/libAndroidInputProxy.so
index 39ba9d9..ba2373b 100644
Binary files a/Assets/Plugins/Android/arm64-v8a/libAndroidInputProxy.so and b/Assets/Plugins/Android/arm64-v8a/libAndroidInputProxy.so differ
diff --git a/Assets/Plugins/Android/armeabi-v7a/libAndroidInputProxy.so b/Assets/Plugins/Android/armeabi-v7a/libAndroidInputProxy.so
index b2b2821..1659e58 100644
Binary files a/Assets/Plugins/Android/armeabi-v7a/libAndroidInputProxy.so and b/Assets/Plugins/Android/armeabi-v7a/libAndroidInputProxy.so differ