Dynamic Sensor Discovery Implementation
Defined the dynamic sensor meta data type and UUID of sensor, as well
as the broadcast intent that is related to dynamic sensor status
change.
Modify SensorManager, SystemSensorManager and the JNI layer to support
dynamic sensor discovery.
Added SensorNotificationService to notify apps that sensor connected
or disconnected via broadcast.
Change-Id: I28adfb005357d7e3983d65117d6865830c75027d
diff --git a/services/core/java/com/android/server/SensorNotificationService.java b/services/core/java/com/android/server/SensorNotificationService.java
new file mode 100644
index 0000000..0610464
--- /dev/null
+++ b/services/core/java/com/android/server/SensorNotificationService.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.hardware.Sensor;
+import android.hardware.SensorEvent;
+import android.hardware.SensorEventListener;
+import android.hardware.SensorManager;
+import android.os.SystemClock;
+import android.os.SystemProperties;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.util.Slog;
+
+public class SensorNotificationService extends SystemService implements SensorEventListener {
+ //TODO: set DBG to false or remove Slog before release
+ private static final boolean DBG = true;
+ private static final String TAG = "SensorNotificationService";
+ private Context mContext;
+
+ private SensorManager mSensorManager;
+ private Sensor mMetaSensor;
+
+ public SensorNotificationService(Context context) {
+ super(context);
+ mContext = context;
+ }
+
+ public void onStart() {
+ LocalServices.addService(SensorNotificationService.class, this);
+ }
+
+ public void onBootPhase(int phase) {
+ if (phase == PHASE_THIRD_PARTY_APPS_CAN_START) {
+ // start
+ mSensorManager = (SensorManager) mContext.getSystemService(Context.SENSOR_SERVICE);
+ mMetaSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_DYNAMIC_SENSOR_META);
+ if (mMetaSensor == null) {
+ if (DBG) Slog.d(TAG, "Cannot obtain dynamic meta sensor, not supported.");
+ } else {
+ mSensorManager.registerListener(this, mMetaSensor,
+ SensorManager.SENSOR_DELAY_FASTEST);
+ }
+ }
+ }
+
+ private void broadcastDynamicSensorChanged() {
+ Intent i = new Intent(Intent.ACTION_DYNAMIC_SENSOR_CHANGED);
+ i.setFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); // avoid waking up manifest receivers
+ mContext.sendBroadcastAsUser(i, UserHandle.ALL);
+ if (DBG) Slog.d(TAG, "DYNS sent dynamic sensor broadcast");
+ }
+
+ @Override
+ public void onSensorChanged(SensorEvent event) {
+ if (event.sensor == mMetaSensor) {
+ broadcastDynamicSensorChanged();
+ }
+ }
+
+ @Override
+ public void onAccuracyChanged(Sensor sensor, int accuracy) {
+
+ }
+}
+