PowerUtils.java

/*
 * Copyright (C) 2014 AChep@xda <ynkr.wang@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 */
package com.bullmobi.base.utils.power;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.BatteryManager;
import android.os.PowerManager;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

import com.bullmobi.base.Device;

/**
 * Helper class with utils related to power.
 *
 * @author Artem Chepurnoy
 */
public class PowerUtils {

    /**
     * @return true is device is plugged at this moment, false otherwise.
     * @see #isPlugged(android.content.Intent)
     */
    public static boolean isPlugged(@NonNull Context context) {
        IntentFilter intentFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
        return isPlugged(context.registerReceiver(null, intentFilter));
    }

    /**
     * @return true is device is plugged at this moment, false otherwise.
     * @see #isPlugged(android.content.Context)
     */
    @SuppressLint("InlinedApi")
    public static boolean isPlugged(@Nullable Intent intent) {
        if (intent == null) {
            return false;
        }

        final int plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
        return plugged == BatteryManager.BATTERY_PLUGGED_AC
                || plugged == BatteryManager.BATTERY_PLUGGED_USB
                || plugged == BatteryManager.BATTERY_PLUGGED_WIRELESS;
    }

    /**
     * Gets Power Manager by context and checks if screen is on.
     *
     * @return True if screen is on atm, False otherwise.
     */
    public static boolean isScreenOn(@NonNull Context context) {
        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        return isScreenOn(pm);
    }

    @SuppressWarnings("deprecation")
    @SuppressLint("NewApi")
    public static boolean isScreenOn(@NonNull PowerManager pm) {
        return Device.hasKitKatWatchApi()
                ? pm.isInteractive()
                : pm.isScreenOn();
    }

    /**
     * @see #isPlugged(android.content.Context)
     * @see #isPlugged(android.content.Intent)
     */
    @SuppressLint("InlinedApi")
    public static int getBatteryLevel(@Nullable Intent intent) {
        if (intent == null) {
            return 100;
        }

        final int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
        final int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
        return level * 100 / scale;
    }

}