WIP : Generic Sensor API implementation

device/sensors/android/java/src/org/chromium/device/sensors/ProximitySensorImpl.java

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.device.sensors;
+
+import android.hardware.Sensor;
+import android.hardware.SensorEvent;
+import android.hardware.SensorManager;
+import android.os.Handler;
+
+import org.chromium.mojo.system.SharedBufferHandle;
+import org.chromium.mojom.device.sensors.SensorType;
+
+import java.nio.ByteBuffer;
+
+/**
+ * ProximitySensor implementation.
+ */
+public class ProximitySensorImpl extends SensorBase {
+    ProximitySensorImpl(SensorManager manager, Handler handler, SharedBufferHandle handle,
+            long offset, long size, SensorStateObserver observer)
+            throws SensorException {
+        super(Sensor.TYPE_PROXIMITY, manager, handler, handle, offset, size, observer);
+    }
+
+    @Override
+    public int getType() {
+        return SensorType.PROXIMITY;
+    }
+
+    @Override
+    protected void fillSensorReadingData(SensorEvent event, ByteBuffer buffer)
+            throws SensorException {
+        if(event.values.length < 1) throw new SensorException();
+        // Distance
+        buffer.putDouble(event.values[0]);
+    }
+}