220 lines
8.3 KiB
Java
220 lines
8.3 KiB
Java
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server;
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import android.app.Notification;
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import android.app.NotificationManager;
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import android.app.PendingIntent;
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import android.content.Context;
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import android.content.Intent;
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import android.hardware.ISensorService;
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import android.hardware.SensorManager;
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import android.os.Binder;
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import android.os.ParcelFileDescriptor;
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import android.os.RemoteException;
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import android.os.IBinder;
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import android.os.SystemProperties;
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import android.util.Config;
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import android.util.Log;
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import com.android.internal.R;
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import java.util.ArrayList;
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/**
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* Class that manages the device's sensors. It register clients and activate
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* the needed sensors. The sensor events themselves are not broadcasted from
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* this service, instead, a file descriptor is provided to each client they
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* can read events from.
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*/
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class SensorService extends ISensorService.Stub {
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private static final int SENSOR_NOTIFICATION_ACCURACY_LEVEL = 1;
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private static final String TAG = SensorService.class.getSimpleName();
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private static final boolean DEBUG = false;
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private static final boolean localLOGV = DEBUG ? Config.LOGD : Config.LOGV;
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private static final int SENSOR_DISABLE = -1;
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private NotificationManager mNotificationManager;
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private int mCompassAccuracy = -1;
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private final Context mContext;
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private final class Listener implements IBinder.DeathRecipient {
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final IBinder mListener;
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int mSensors = 0;
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int mDelay = 0x7FFFFFFF;
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Listener(IBinder listener) {
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mListener = listener;
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}
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void addSensor(int sensor, int delay) {
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mSensors |= sensor;
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if (mDelay > delay)
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mDelay = delay;
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}
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void removeSensor(int sensor) {
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mSensors &= ~sensor;
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}
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boolean hasSensor(int sensor) {
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return ((mSensors & sensor) != 0);
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}
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public void binderDied() {
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if (localLOGV) Log.d(TAG, "sensor listener died");
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synchronized(mListeners) {
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mListeners.remove(this);
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for (int sensor = SensorManager.SENSOR_MAX; sensor > 0; sensor >>>= 1) {
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if (hasSensor(sensor)) {
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try {
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deactivateIfUnused(sensor);
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} catch (RemoteException e) {
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Log.w(TAG, "RemoteException in binderDied");
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}
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}
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}
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mListeners.notify();
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}
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}
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}
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public SensorService(Context context) {
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if (localLOGV) Log.d(TAG, "SensorService startup");
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_sensors_control_init();
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mNotificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
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mContext = context;
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}
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public ParcelFileDescriptor getDataChanel() throws RemoteException {
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return _sensors_control_open();
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}
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public void reportAccuracy(int sensor, int value) {
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if ((sensor & (SensorManager.SENSOR_ORIENTATION|SensorManager.SENSOR_ORIENTATION_RAW)) != 0) {
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synchronized (mNotificationManager) {
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if (value != mCompassAccuracy) {
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Log.d(TAG, "Compass needs calibration, accuracy=" + value);
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if (!SystemProperties.getBoolean("debug.sensors.notification", false)) {
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// don't show the sensors notification by default
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return;
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}
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mCompassAccuracy = value;
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if (value == -1) {
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mNotificationManager.cancel(0);
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} else {
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if (value <= SENSOR_NOTIFICATION_ACCURACY_LEVEL) {
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long token = Binder.clearCallingIdentity();
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try {
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CharSequence banner = mContext.getString(R.string.compass_accuracy_banner);
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CharSequence title = mContext.getString(R.string.compass_accuracy_notificaction_title);
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CharSequence body = mContext.getString(R.string.compass_accuracy_notificaction_body);
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Notification n = new Notification(R.drawable.stat_notify_calibrate_compass,
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banner, System.currentTimeMillis());
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Intent bogusIntent = new Intent(mContext, SensorService.class);
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PendingIntent contentIntent = PendingIntent.getActivity(mContext, 0, bogusIntent,
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PendingIntent.FLAG_CANCEL_CURRENT|PendingIntent.FLAG_ONE_SHOT);
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n.setLatestEventInfo(mContext, title, body, contentIntent);
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mNotificationManager.notify(0, n);
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} finally {
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Binder.restoreCallingIdentity(token);
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}
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} else {
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mNotificationManager.cancel(0);
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}
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}
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}
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}
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}
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}
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public boolean enableSensor(IBinder listener, int sensor, int enable)
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throws RemoteException {
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if (localLOGV) Log.d(TAG, "enableSensor " + sensor + " " + enable);
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if (listener == null) throw new NullPointerException("listener is null in enableSensor");
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synchronized(mListeners) {
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if (enable!=SENSOR_DISABLE && !_sensors_control_activate(sensor, true)) {
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Log.w(TAG, "could not enable sensor " + sensor);
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return false;
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}
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IBinder binder = listener;
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Listener l = null;
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int minDelay = enable;
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int size = mListeners.size();
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for (int i = 0; i < size ; i++) {
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Listener test = mListeners.get(i);
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if (binder.equals(test.mListener)) {
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l = test;
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}
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if (minDelay > test.mDelay)
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minDelay = test.mDelay;
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}
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if (l == null && enable!=SENSOR_DISABLE) {
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l = new Listener(listener);
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binder.linkToDeath(l, 0);
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mListeners.add(l);
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mListeners.notify();
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}
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if (l == null) {
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throw new NullPointerException("no Listener object in enableSensor");
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}
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if (minDelay >= 0) {
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_sensors_control_set_delay(minDelay);
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}
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if (enable != SENSOR_DISABLE) {
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l.addSensor(sensor, enable);
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} else {
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l.removeSensor(sensor);
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deactivateIfUnused(sensor);
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if (l.mSensors == 0) {
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mListeners.remove(l);
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binder.unlinkToDeath(l, 0);
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mListeners.notify();
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}
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}
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}
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return true;
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}
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private void deactivateIfUnused(int sensor) throws RemoteException {
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int size = mListeners.size();
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for (int i = 0; i < size ; i++) {
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if (mListeners.get(i).hasSensor(sensor))
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return;
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}
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_sensors_control_activate(sensor, false);
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reportAccuracy(sensor, -1);
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}
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private ArrayList<Listener> mListeners = new ArrayList<Listener>();
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private static native int _sensors_control_init();
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private static native ParcelFileDescriptor _sensors_control_open();
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private static native boolean _sensors_control_activate(int sensor, boolean activate);
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private static native int _sensors_control_set_delay(int ms);
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}
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