/*
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* Copyright (C) 2014 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.policy;
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import android.os.Handler;
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import android.content.Context;
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import android.hardware.Sensor;
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import android.hardware.SensorManager;
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import android.hardware.TriggerEvent;
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import android.hardware.TriggerEventListener;
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import java.io.PrintWriter;
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/**
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* Watches for wake gesture sensor events then invokes the listener.
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*/
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public abstract class WakeGestureListener {
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private static final String TAG = "WakeGestureListener";
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private final SensorManager mSensorManager;
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private final Handler mHandler;
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private final Object mLock = new Object();
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private boolean mTriggerRequested;
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private Sensor mSensor;
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public WakeGestureListener(Context context, Handler handler) {
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mSensorManager = (SensorManager)context.getSystemService(Context.SENSOR_SERVICE);
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mHandler = handler;
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mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_WAKE_GESTURE);
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}
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public abstract void onWakeUp();
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public boolean isSupported() {
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synchronized (mLock) {
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return mSensor != null;
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}
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}
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public void requestWakeUpTrigger() {
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synchronized (mLock) {
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if (mSensor != null && !mTriggerRequested) {
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mTriggerRequested = true;
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mSensorManager.requestTriggerSensor(mListener, mSensor);
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}
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}
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}
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public void cancelWakeUpTrigger() {
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synchronized (mLock) {
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if (mSensor != null && mTriggerRequested) {
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mTriggerRequested = false;
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mSensorManager.cancelTriggerSensor(mListener, mSensor);
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}
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}
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}
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public void dump(PrintWriter pw, String prefix) {
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synchronized (mLock) {
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pw.println(prefix + TAG);
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prefix += " ";
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pw.println(prefix + "mTriggerRequested=" + mTriggerRequested);
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pw.println(prefix + "mSensor=" + mSensor);
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}
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}
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private final TriggerEventListener mListener = new TriggerEventListener() {
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@Override
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public void onTrigger(TriggerEvent event) {
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synchronized (mLock) {
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mTriggerRequested = false;
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mHandler.post(mWakeUpRunnable);
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}
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}
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};
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private final Runnable mWakeUpRunnable = new Runnable() {
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@Override
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public void run() {
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onWakeUp();
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}
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};
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}
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