gecko/embedding/android/GeckoBatteryManager.java

130 lines
4.5 KiB
Java

/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Android code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mounir Lamouri <mounir.lamouri@mozilla.com> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.gecko;
import java.lang.Math;
import android.util.Log;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.BatteryManager;
public class GeckoBatteryManager
extends BroadcastReceiver
{
private final static float kDefaultLevel = 1.0f;
private final static boolean kDefaultCharging = true;
private final static float kMinimumLevelChange = 0.01f;
private static boolean sNotificationsEnabled = false;
private static float sLevel = kDefaultLevel;
private static boolean sCharging = kDefaultCharging;
@Override
public void onReceive(Context context, Intent intent) {
if (!intent.getAction().equals(Intent.ACTION_BATTERY_CHANGED)) {
Log.e("GeckoBatteryManager", "Got an unexpected intent!");
return;
}
boolean previousCharging = isCharging();
float previousLevel = getLevel();
if (intent.getBooleanExtra(BatteryManager.EXTRA_PRESENT, false)) {
int plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
if (plugged == -1) {
sCharging = kDefaultCharging;
Log.e("GeckoBatteryManager", "Failed to get the plugged status!");
} else {
// Likely, if plugged > 0, it's likely plugged and charging but the doc
// isn't clear about that.
sCharging = plugged != 0;
}
// We need two floats because sLevel is a float.
float current = (float)intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
float max = (float)intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
if (current == -1 || max == -1) {
Log.e("GeckoBatteryManager", "Failed to get battery level!");
sLevel = kDefaultLevel;
} else {
sLevel = current / max;
}
} else {
sLevel = kDefaultLevel;
sCharging = kDefaultCharging;
}
/*
* We want to inform listeners if the following conditions are fulfilled:
* - we have at least one observer;
* - the charging state has changed
* OR
* the level has changed of at least kMinimumLevelChange
*/
if (sNotificationsEnabled &&
(previousCharging != isCharging() ||
Math.abs(previousLevel - getLevel()) >= kMinimumLevelChange)) {
GeckoAppShell.notifyBatteryChange(sLevel, sCharging);
}
}
public static boolean isCharging() {
return sCharging;
}
public static float getLevel() {
return sLevel;
}
public static void enableNotifications() {
sNotificationsEnabled = true;
}
public static void disableNotifications() {
sNotificationsEnabled = false;
}
public static float[] getCurrentInformation() {
return new float[] { getLevel(), isCharging() ? 1.0f : 0.0f };
}
}