读取 Android 台设备上的输入电压

Question

我想编写一个应用程序来读取设备充电时输入电源的统计数据（例如电压、毫安等）。此信息可能有多种用途，例如比较通过不同方式充电的能力： - 1m 电源线与 3m 电源线的交流插座 - 车载充电器 - PC USB 与笔记本电脑 USB - 等等....

我曾尝试使用 Google 博士找到它，但我所能找到的只是能够读取电池统计数据（例如当前百分比、charging/unplugged 状态），而不是输入统计数据.

谢谢。

Answer 1

经过多次实验和其他小组的帮助，我发现无法仅通过软件获取电池电流值（因为 h/w 不支持）。我找到的唯一方法是用万用表测量流过电池的电流。

您可以尝试使用下面给出的示例并检查...

您可以只查看当前小部件的源代码。它具有某些平台存储当前值的硬编码路径。

/*
 *  Copyright (c) 2010-2011 Ran Manor
 *  
 *  This file is part of CurrentWidget.
 *    
 *  CurrentWidget 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.
 *
 *  CurrentWidget 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 CurrentWidget.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.manor.currentwidget.library;

import java.io.File;

import android.os.Build;
import android.util.Log;

public class CurrentReaderFactory {

    static public Long getValue() {

        File f = null;

        // htc desire hd / desire z / inspire?
        if (Build.MODEL.toLowerCase().contains("desire hd") ||
                Build.MODEL.toLowerCase().contains("desire z") ||
                Build.MODEL.toLowerCase().contains("inspire")) {

            f = new File("/sys/class/power_supply/battery/batt_current");
            if (f.exists()) {
                return OneLineReader.getValue(f, false);
            }
        }

        // nexus one cyangoenmod
        f = new File("/sys/devices/platform/ds2784-battery/getcurrent");
        if (f.exists()) {
            return OneLineReader.getValue(f, true);
        }

        // sony ericsson xperia x1
        f = new File("/sys/devices/platform/i2c-adapter/i2c-0/0-0036/power_supply/ds2746-battery/current_now");
        if (f.exists()) {
            return OneLineReader.getValue(f, false);
        }

        // xdandroid
            /*if (Build.MODEL.equalsIgnoreCase("MSM")) {*/
        f = new File("/sys/devices/platform/i2c-adapter/i2c-0/0-0036/power_supply/battery/current_now");
        if (f.exists()) {
            return OneLineReader.getValue(f, false);
        }
            /*}*/

        // droid eris
        f = new File("/sys/class/power_supply/battery/smem_text");
        if (f.exists()) {
            Long value = SMemTextReader.getValue();
            if (value != null)
                return value;
        }

        // htc sensation / evo 3d
        f = new File("/sys/class/power_supply/battery/batt_attr_text");
        if (f.exists())
        {
            Long value = BattAttrTextReader.getValue();
            if (value != null)
                return value;
        }

        // some htc devices
        f = new File("/sys/class/power_supply/battery/batt_current");
        if (f.exists())
            return OneLineReader.getValue(f, false);

        // nexus one
        f = new File("/sys/class/power_supply/battery/current_now");
        if (f.exists())
            return OneLineReader.getValue(f, true);

        // samsung galaxy vibrant       
        f = new File("/sys/class/power_supply/battery/batt_chg_current");
        if (f.exists())
            return OneLineReader.getValue(f, false);

        // sony ericsson x10
        f = new File("/sys/class/power_supply/battery/charger_current");
        if (f.exists())
            return OneLineReader.getValue(f, false);

        // Nook Color
        f = new File("/sys/class/power_supply/max17042-0/current_now");
        if (f.exists())
            return OneLineReader.getValue(f, false);

        return null;
    }
}

读取 Android 台设备上的输入电压

Read incoming voltage on Android devices

android

android-studio

battery