get Battery Level - Android Hardware

Android examples for Hardware:Battery

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Description

get Battery Level

Demo Code

/*/*ww  w  . j a  v  a 2  s .c o  m*/
    SnooZy Charger
    Power Connection manager. Turn the screen off on power connection
    or disconnection, to save battery consumption by the phone's display.

    Copyright (C) 2013 Mudar Noufal <mn@mudar.ca>

    This file is part of SnooZy Charger.

    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 3 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, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.BatteryManager;

public class Main {
    public static float getBatteryLevel(Context context) {
        Intent batteryIntent = context.registerReceiver(null,
                new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
        int level = batteryIntent.getIntExtra(BatteryManager.EXTRA_LEVEL,
                -1);
        int scale = batteryIntent.getIntExtra(BatteryManager.EXTRA_SCALE,
                -1);

        // Error checking that probably isn't needed, just in case.
        if (level == -1 || scale == -1) {
            return 0.50f;
        }

        return ((float) level / (float) scale);
    }
}

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