作者：程序员小冰，GitHub主页：https://github.com/QQ986945193

微博：http://weibo.com/mcxiaobing

首先给大家看一下效果图：



先写一个广播类：

package david.qq986945193.com.davidphonebroadcastreceivershowelectricity;

import android.app.AlertDialog;

import android.app.Dialog;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

/**

 * @author ：程序员小冰

 * @新浪微博 ：http://weibo.com/mcxiaobing

 * @GitHub:https://github.com/QQ986945193

 * @CSDN博客: http://blog.csdn.net/qq_21376985

 * @交流Qq ：986945193

 */

public class BatteryInfoBroadcastReceiver extends BroadcastReceiver {

    @Override

    public void onReceive(Context context, Intent intent) {

        if (Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())) {

            int level = intent.getIntExtra("level", 0);

            //默认总电量 数值范围

            int scale = intent.getIntExtra("scale", 100);

            Dialog dialog = new AlertDialog.Builder(context).setTitle(

                    "电池电量"

            ).setMessage("电池电量为：" + String.valueOf(level * 100 / scale) + "%").setNegativeButton(

                    "关闭", new DialogInterface.OnClickListener() {

                        @Override

                        public void onClick(DialogInterface dialog, int which) {

                        }

                    }

            ).create();

            dialog.show();

        }

    }

}

然后再用一个主类进行动态注册广播调用即可：

 /**

         * 动态注册广播

         */

        BatteryInfoBroadcastReceiver receiver = new BatteryInfoBroadcastReceiver();

        IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);

        registerReceiver(receiver, filter);

项目源代码下载地址：

https://github.com/QQ986945193/PhoneBroadcastReceiverShowElectricity