Android 电池电量监控初步

fmms 13年前
     <p>引言</p> ,学习了包括Activity、Service、AppWidget、Broadcast、Intent、Notification、XML布局、XML配置等基础知识之后,尝试着做一个小玩意儿——电池监控,期间也是阻挠多多,现在基本完成了,所以把自己的经验分享给大家,希望能通过我的文章让还不会的朋友少走弯路,也算是这个小玩意儿的一点贡献。    <p></p> 假设读者已经具备并能基本使用上述基础知识,本文将只描述如何利用上述知识构建一个监控Android电池电量的小程序(若有相关知识不甚清楚,请查询Android SDK自带的document,官方文档是我们学习Android的一大利器),若有任何疑问或建议,欢迎留言提出,bill会很高兴和大家一起学习进步!    <p></p>    <h1>开发环境及Android平台版本</h1>    <p></p>    <p></p> Android SDK 1.6及以上Android X86 虚拟机或真机    <p></p>    <h1>功能描述</h1> 自带的系统电池图标并不能显示当前电量,给不少用户带来了不便,所以本程序将对此进行改进,简单实现对Android手机电量的实时监控,并在左上角状态栏显示实时电池电量的通知图标,若正在充电,则显示充电状态。为方便起见,还为本程序制作了一个AppWidget,成为一个简单的桌面小工具。    <h1>效果预览</h1>    <p>充电效果<br /> <img title="Android电池电量监控初步" border="0" alt="Android电池电量监控初步" src="https://simg.open-open.com/show/850bcb19c8cb20907433b49e102bc1a4.jpg" width="329" height="530" /></p>    <h1>整体思路概览</h1>    <p>①由于要显示电池图标,因此需要一组对应的小icon,程序算出当前电量之后,就在状态栏上显示对应的icon即可。本程序用到的icon已经提供在附件,下载后将里面的icons直接复制到res\drawable-hdpi中即可。</p>    <p>②由于电池更新是一个长期存在的过程,因此需要将我们的程序注册为系统服务,以便长期生存于Android系统中。</p>    <p>③服务不会自行启动,因此我们需要为自己的服务创建一个Activity,在第一次启动本程序的Activity时创建并启动我们的监控服务,之后的事便交由服务处理,Activity暂时未有太大作用(之后还可以在Activity中显示电池当前的各种基本属性等等,本文不作介绍),当然,我们也可以不要Activity,直接将我们的服务设置为开机启动即可,关于开机启动的事项已在<a href="/misc/goto?guid=4959517576702229178" rel="nofollow" target="_blank">【</a><a href="/misc/goto?guid=4959517576702229178" rel="nofollow" target="_blank">Android开机启动Activity或Service</a><a href="/misc/goto?guid=4959517576702229178" rel="nofollow" target="_blank">的方法】</a>一文中详细描述,恕不赘述。</p>    <p>④为了方便起见,应该制作本程序的桌面小工具,也就用到了AppWidget方面的知识,稍后一一道来。</p>    <p> </p>    <p></p>    <h1>分而治之</h1>    <h2>小麻雀的心脏——电池监控服务MonitorService</h2> ACTION_BATTERY_CHANGED    <p></p> 的完整代码,我会在可能费解的地方批注,希望能帮助大家理解。    <p></p>    <pre class="brush:java; toolbar: true; auto-links: false;">    package com.billhoo.study;             import android.app.Notification;  //通知,即显示在屏幕左上角的小图标       import android.app.NotificationManager;       import android.app.PendingIntent;       import android.app.Service;       import android.content.BroadcastReceiver;       import android.content.Context;       import android.content.Intent;       import android.content.IntentFilter;       import android.os.BatteryManager;       import android.os.IBinder;             public class MonitorService extends Service {         @Override        public IBinder onBind(Intent intent) {           return null;         }               @Override        public void onStart(Intent intent, int startId) {           // 定义电池电量更新广播的过滤器,只接受带有ACTION_BATTERRY_CHANGED事件的Intent           IntentFilter batteryChangedReceiverFilter = new IntentFilter();           batteryChangedReceiverFilter.addAction(Intent.ACTION_BATTERY_CHANGED);                      // 向系统注册batteryChangedReceiver接收器,本接收器的实现见代码字段处           registerReceiver(batteryChangedReceiver, batteryChangedReceiverFilter);                 // 实例化Notification通知的管理器,即字段notification manager           notifyManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);                 // 由于初始化本服务时系统可能没有发出ACTION_BATTERY_CHANGED广播,那么刚才注册的那个接收器将不会在本服务启动时被激活,这种情况下就无法显示当前电量,因此在这里添加一个匿名广播接收器。           new BroadcastReceiver() {             @Override            public void onReceive(Context context, Intent intent) {               int level = intent.getIntExtra("level", 0);  //电池电量等级               int scale = intent.getIntExtra("scale", 100);  //电池满时百分比               int status = intent.getIntExtra("status", 0);  //电池状态                     // 若正在充电               if (status == BatteryManager.BATTERY_STATUS_CHARGING)                 notification = getNotification(getChargingIcon(level * 100 / scale),                     "电池监控", System.currentTimeMillis(), "电池电量", "正在充电");               else                notification = getNotification(getStateIcon(level * 100 / scale),                     "电池监控", System.currentTimeMillis(), "电池电量", "请及时充电");                      //向系统发送此通知,为方便起见,通知ID简单设为0               notifyManager.notify(0, notification);             }           };         }               @Override        public void onDestroy() {           //当本服务终止时,通过通知ID注销左上角的通知           notifyManager.cancel(0);         }               // --------------------------------------私有方法------------------------------         // 获得一个notification         private Notification getNotification(int notificationIcon, String tickerText,             long when, String contentTitle, String contentText) {           // 定义该notification的扩展文本和intent           Notification notification = new Notification(notificationIcon, tickerText,               when);           Context context = getApplicationContext();           Intent notificationIntent = new Intent(context, BatteryInfo.class);           PendingIntent contentIntent = PendingIntent.getActivity(this, 0,               notificationIntent, 0);           notification.setLatestEventInfo(context, contentTitle, contentText,               contentIntent);                 // 设置本状态出现在“正在进行”而非“通知”栏目,不允许用户清除状态图标           notification.flags |= Notification.FLAG_ONGOING_EVENT;           return notification;         }               // 获得对应的电池状态图标         private int getStateIcon(int batteryHealth) {           if (batteryHealth >= 0 || batteryHealth <= 100)             return batteryStateIcons[batteryHealth]; //这里是为了方便起见而硬编码的资源数组,直接从R.java文件中提取的十六进制资源ID           return R.drawable.stat_sys_battery_unknown;         }               // 获得对应的充电状态图标         private int getChargingIcon(int batteryHealth) {           if (batteryHealth >= 0 && batteryHealth < 5)             return R.drawable.stat_sys_battery_charge_anim0;           if (batteryHealth >= 5 && batteryHealth < 10)             return R.drawable.stat_sys_battery_charge_anim01;           if (batteryHealth >= 10 && batteryHealth < 15)             return R.drawable.stat_sys_battery_charge_anim02;           if (batteryHealth >= 15 && batteryHealth < 20)             return R.drawable.stat_sys_battery_charge_anim03;           if (batteryHealth >= 20 && batteryHealth < 25)             return R.drawable.stat_sys_battery_charge_anim04;           if (batteryHealth >= 25 && batteryHealth < 30)             return R.drawable.stat_sys_battery_charge_anim05;           if (batteryHealth >= 30 && batteryHealth < 35)             return R.drawable.stat_sys_battery_charge_anim06;           if (batteryHealth >= 35 && batteryHealth < 40)             return R.drawable.stat_sys_battery_charge_anim07;           if (batteryHealth >= 40 && batteryHealth < 45)             return R.drawable.stat_sys_battery_charge_anim08;           if (batteryHealth >= 45 && batteryHealth < 50)             return R.drawable.stat_sys_battery_charge_anim09;           if (batteryHealth >= 50 && batteryHealth < 55)             return R.drawable.stat_sys_battery_charge_anim10;           if (batteryHealth >= 55 && batteryHealth < 60)             return R.drawable.stat_sys_battery_charge_anim11;           if (batteryHealth >= 60 && batteryHealth < 65)             return R.drawable.stat_sys_battery_charge_anim12;           if (batteryHealth >= 65 && batteryHealth < 70)             return R.drawable.stat_sys_battery_charge_anim13;           if (batteryHealth >= 70 && batteryHealth < 75)             return R.drawable.stat_sys_battery_charge_anim14;           if (batteryHealth >= 75 && batteryHealth < 80)             return R.drawable.stat_sys_battery_charge_anim15;           if (batteryHealth >= 80 && batteryHealth < 85)             return R.drawable.stat_sys_battery_charge_anim16;           if (batteryHealth >= 85 && batteryHealth < 90)             return R.drawable.stat_sys_battery_charge_anim17;           if (batteryHealth >= 90 && batteryHealth < 95)             return R.drawable.stat_sys_battery_charge_anim18;           if (batteryHealth >= 95 && batteryHealth < 100)             return R.drawable.stat_sys_battery_charge_anim19;           if (batteryHealth == 100)             return R.drawable.stat_sys_battery_charge_animfull;           return R.drawable.stat_sys_battery_unknown;         }               // -------------------------------私有字段--------------------------------------         private NotificationManager notifyManager = null;         private Notification notification = null;               //这里是为了方便起见而硬编码的icon资源数组,直接从R.java文件中提取的十六进制资源ID,本数组的0号元素0x7f020002表示资源stat_sys_battery_0.png(见附件),以后累加。不同配置的ID可能不同,请读者自行修改。         private int batteryStateIcons[] = { 0x7f020002, 0x7f020003, 0x7f020004,             0x7f020005, 0x7f020006, 0x7f020007, 0x7f020008, 0x7f020009, 0x7f02000a,             0x7f02000b, 0x7f02000c, 0x7f02000d, 0x7f02000e, 0x7f02000f, 0x7f020010,             0x7f020011, 0x7f020012, 0x7f020013, 0x7f020014, 0x7f020015, 0x7f020016,             0x7f020017, 0x7f020018, 0x7f020019, 0x7f02001a, 0x7f02001b, 0x7f02001c,             0x7f02001d, 0x7f02001e, 0x7f02001f, 0x7f020020, 0x7f020021, 0x7f020022,             0x7f020023, 0x7f020024, 0x7f020025, 0x7f020026, 0x7f020027, 0x7f020028,             0x7f020029, 0x7f02002a, 0x7f02002b, 0x7f02002c, 0x7f02002d, 0x7f02002e,             0x7f02002f, 0x7f020030, 0x7f020031, 0x7f020032, 0x7f020033, 0x7f020034,             0x7f020035, 0x7f020036, 0x7f020037, 0x7f020038, 0x7f020039, 0x7f02003a,             0x7f02003b, 0x7f02003c, 0x7f02003d, 0x7f02003e, 0x7f02003f, 0x7f020040,             0x7f020041, 0x7f020042, 0x7f020043, 0x7f020044, 0x7f020045, 0x7f020046,             0x7f020047, 0x7f020048, 0x7f020049, 0x7f02004a, 0x7f02004b, 0x7f02004c,             0x7f02004d, 0x7f02004e, 0x7f02004f, 0x7f020050, 0x7f020051, 0x7f020052,             0x7f020053, 0x7f020054, 0x7f020055, 0x7f020056, 0x7f020057, 0x7f020058,             0x7f020059, 0x7f02005a, 0x7f02005b, 0x7f02005c, 0x7f02005d, 0x7f02005e,             0x7f02005f, 0x7f020060, 0x7f020061, 0x7f020062, 0x7f020063, 0x7f020064,             0x7f020065, 0x7f02007b };               // 接受电池信息更新的广播         private BroadcastReceiver batteryChangedReceiver = new BroadcastReceiver() {           public void onReceive(Context context, Intent intent) {             int level = intent.getIntExtra("level", 0);             int scale = intent.getIntExtra("scale", 100);             int status = intent.getIntExtra("status", 0);                   // 若正在充电             if (status == BatteryManager.BATTERY_STATUS_CHARGING)               notification = getNotification(getChargingIcon(level * 100 / scale),                   "Battery Monitor", System.currentTimeMillis(), "电池电量", "正在充电");             else              notification = getNotification(getStateIcon(level * 100 / scale),                   "Battery Monitor", System.currentTimeMillis(), "电池电量", "请及时充电");             notifyManager.notify(0, notification);           }         };       } </pre>    <p></p>    <h2>光有心,不跳怎么行?——BatteryMonitor</h2>    <p></p>    <p></p>    <p></p>    <p><span style="font-family:宋体;">服务在系统配置文件中进行注册。</span></p>    <pre class="brush:xml; toolbar: true; auto-links: false;">    <!-- service -->       <service android:name=".MonitorService" android:enabled="true" /> </pre>    <p></p>    <span style="font-family:'宋体';font-size:10.5pt;mso-spacerun:'yes';">Bill</span>的另一篇文章【Android开机启动Activity或Service的方法】),下面,我们将在一个Activity中启动MonitorService服务。    <p></p> 在AndroidManifest.xml中进行注册    <p></p>    <pre class="brush:xml; toolbar: true; auto-links: false;">    <!-- activity -->      <activity android:name=".BatteryMonitor" android:label="@string/battery_monitor_name">          <intent-filter>          <action android:name="android.intent.action.MAIN" />            <category android:name="android.intent.category.LAUNCHER" />          </intent-filter>      </activity> </pre>    <p></p>    <span style="font-family:'宋体';font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;">中编码启动我们的</span>MonitorService</span>服务即可    <pre class="brush:java; toolbar: true; auto-links: false;">    package com.billhoo.study;             import android.app.Activity;       import android.content.Intent;       import android.os.Bundle;                   public class BatteryMonitor extends Activity {         /** Called when the activity is first created. */        @Override        public void onCreate(Bundle savedInstanceState) {           super.onCreate(savedInstanceState);           setContentView(R.layout.main);                      //启动电池监控服务           startService(new Intent(this, MonitorService.class));         }       } </pre>    <p></p>    <span style="font-family:'宋体';font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;">,看看左上角是不是出现了一个小电池图标,并显示着当前电量?</span></span>    <p></p>    <p></p>    <p> </p> 麻雀虽小,五脏俱全——MonitorWidgetProvider    <span style="font-family:黑体;">,</span>为麻雀穿上衣服    <h2></h2> 用户会将自己喜爱的小程序放在桌面以便快速启动,当然我们就不能放过这个机会!    <p></p> 还做不到这一点,难道我们应该期望用户在他的程序列表中长按我们的Activity,然后使出吃奶的劲儿把它扔在桌面上吗?不,他们通常长按桌面,然后轻点一个自己中意的Widget插件便能满足他们的需求。    <p></p> ,一来方便用户查看电池状态(仅凭左上角的通知有时候并不能满足用户的需求),二来方便用户随时启动本程序附带的电池详细数据报告(本功能并未在本文中实现)。    <p></p>    <p></p> 本身就是一个广播接收器(BroadcastReceiver),因此我们最初企图直接用这个Widget接受ACTION_BATTERY_CHANGED广播并作出反应,但却发现这个接收器并不会接受电池更新的广播(不论我们在配置文件中配置与否)。所以只能另寻出路,我们想到,可以使用一个单独的为本Widget服务的Service,该Service检测到电池电量更新后就更新桌面的Widget显示。于是便有以下Widget及其配套Service的实现。    <p></p> 创建一个配置文件,用于描述本Widget在桌面显示时是个什么样子。    <p></p>    <pre class="brush:xml; toolbar: true; auto-links: false;">    <!-- 项目路径\res\layout\monitor_widget_layout.xml -->        <?xml version="1.0" encoding="utf-8"?>      <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"            android:orientation="vertical"          android:layout_width="72dip"          android:layout_height="72dip">          <ImageView android:id="@+id/monitor_widget_view"           android:layout_width="fill_parent"          android:layout_height="fill_parent"          android:src="@drawable/vertical_battery_unknown" />       </LinearLayout> </pre>    <p></p>    <pre class="brush:xml; toolbar: true; auto-links: false;">    <!-- 项目路径\res\xml\monitor_widget_info.xml (xml文件夹是自行创建的)-->      <?xml version="1.0" encoding="utf-8"?>      <appwidget-providerxmlns:androidappwidget-providerxmlns:android="http://schemas.android.com/apk/res/android"               android:initialLayout="@layout/monitor_widget_layout"      android:minWidth="72dip" android:minHeight="72dip" /> </pre>    <span style="font-family:宋体;">配置文件中注册我们的</span>Widget    <p></p>    <pre class="brush:xml; toolbar: true; auto-links: false;">    <receiver android:name=".MonitorWidgetProvider">     <intent-filter>      <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />      <action android:name="android.intent.action.BATTERY_CHANGED" />      </intent-filter>      <meta-data android:name="android.appwidget.provider"        android:resource="@xml/monitor_widget_info" />      </receiver> </pre>    <p></p>    <span style="font-family:'宋体';font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;">的实现代码<pre class="brush:java; toolbar: true; auto-links: false;">    package com.billhoo.study;             import android.appwidget.AppWidgetManager;       import android.appwidget.AppWidgetProvider;       import android.content.Context;       import android.content.Intent;             public class MonitorWidgetProvider extends AppWidgetProvider        {         //当Widget第一次被启动时,启动配套服务         @Override        public void onEnabled(Context context) {           context.startService(new Intent(context,              WidgetUpdateService.class));         }               //当Widget更新时,启动配套服务         @Override        public void onUpdate(Context context, AppWidgetManager              appWidgetManager,             int appWidgetIds[]) {           super.onUpdate(context, appWidgetManager, appWidgetIds);           context.startService(new Intent(context,              WidgetUpdateService.class));         }               // 当桌面上这个widget的所有实体都被删除后,停止配套服务         @Override        public void onDisabled(Context context) {           context.stopService(new Intent(context, WidgetUpdateService.class));         }       } </pre> <p></p> <span style="font-family:'宋体';font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;font-size:10.5pt;mso-spacerun:'yes';"><span style="text-align:left;margin-top:0pt;font-family:宋体;margin-bottom:0pt;">编写配套的</span>Service。</span></span> <p></p> <p>中注册这个服务。</p> <pre class="brush:xml; toolbar: true; auto-links: false;"><service android:name=".WidgetUpdateService" android:enabled="true" /></pre> <p></p> <p><span style="font-family:'宋体';font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;"><span style="font-family:'宋体';font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;">然后编写Java 代码:</span></span></span></span></span></span></p> <pre class="brush:java; toolbar: true; auto-links: false;">    package com.billhoo.study;             import android.app.Service;       import android.appwidget.AppWidgetManager;       import android.content.BroadcastReceiver;       import android.content.ComponentName;       import android.content.Context;       import android.content.Intent;       import android.content.IntentFilter;       import android.os.BatteryManager;       import android.os.IBinder;       import android.widget.RemoteViews;             //用以根据电池电量更新而刷新桌面Widget的服务       public class WidgetUpdateService extends Service {         @Override        public IBinder onBind(Intent intent) {           return null;         }               @Override        public void onStart(Intent intent, int startId) {           // 向系统注册电池电量更新广播,只接受带有ACTION_BATTERRY_CHANGED事件的Intent           registerReceiver(this.bCR, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));                 bCR = new BroadcastReceiver() {             @Override            public void onReceive(Context context, Intent intent) {               int level = intent.getIntExtra("level", 0);               int scale = intent.getIntExtra("scale", 100);               int status = intent.getIntExtra("status", 0);               int batteryHealth = level * 100 / scale;               int icon = 0;                     AppWidgetManager widgetManager = AppWidgetManager.getInstance(context);               RemoteViews widgetView = new RemoteViews(context.getPackageName(),                   R.layout.monitor_widget_layout);                     // 若正在充电               if (status == BatteryManager.BATTERY_STATUS_CHARGING) {                 icon = getChargingIcon(batteryHealth);                 widgetView.setImageViewResource(R.id.monitor_widget_view, icon                       );               } else                widgetView.setImageViewResource(R.id.monitor_widget_view,                     getStateIcon(batteryHealth));               widgetManager.updateAppWidget(new ComponentName(context,                   MonitorWidgetProvider.class), widgetView);             }           };         }               private BroadcastReceiver bCR = null;               // 获取电池状态图标         private int getStateIcon(int batteryHealth) {           if (batteryHealth >= 0 || batteryHealth <= 100)             return batteryStateIcon[batteryHealth / 5];           return R.drawable.vertical_battery_unknown;         }               // 获得对应的充电状态图标         private int getChargingIcon(int batteryHealth) {           if (batteryHealth >= 0 && batteryHealth < 5)             return R.drawable.vertical_charging_00;           if (batteryHealth >= 5 && batteryHealth < 10)             return R.drawable.vertical_charging_01;           if (batteryHealth >= 10 && batteryHealth < 15)             return R.drawable.vertical_charging_02;           if (batteryHealth >= 15 && batteryHealth < 20)             return R.drawable.vertical_charging_03;           if (batteryHealth >= 20 && batteryHealth < 25)             return R.drawable.vertical_charging_04;           if (batteryHealth >= 25 && batteryHealth < 30)             return R.drawable.vertical_charging_05;           if (batteryHealth >= 30 && batteryHealth < 35)             return R.drawable.vertical_charging_06;           if (batteryHealth >= 35 && batteryHealth < 40)             return R.drawable.vertical_charging_07;           if (batteryHealth >= 40 && batteryHealth < 45)             return R.drawable.vertical_charging_08;           if (batteryHealth >= 45 && batteryHealth < 50)             return R.drawable.vertical_charging_09;           if (batteryHealth >= 50 && batteryHealth < 55)             return R.drawable.vertical_charging_10;           if (batteryHealth >= 55 && batteryHealth < 60)             return R.drawable.vertical_charging_11;           if (batteryHealth >= 60 && batteryHealth < 65)             return R.drawable.vertical_charging_12;           if (batteryHealth >= 65 && batteryHealth < 70)             return R.drawable.vertical_charging_13;           if (batteryHealth >= 70 && batteryHealth < 75)             return R.drawable.vertical_charging_14;           if (batteryHealth >= 75 && batteryHealth < 80)             return R.drawable.vertical_charging_15;           if (batteryHealth >= 80 && batteryHealth < 85)             return R.drawable.vertical_charging_16;           if (batteryHealth >= 85 && batteryHealth < 90)             return R.drawable.vertical_charging_17;           if (batteryHealth >= 90 && batteryHealth < 95)             return R.drawable.vertical_charging_18;           if (batteryHealth >= 95 && batteryHealth < 100)             return R.drawable.vertical_charging_19;           if (batteryHealth == 100)             return R.drawable.vertical_battery_full;           return R.drawable.stat_sys_battery_unknown;         }               private int batteryStateIcon[] = { 0x7f02007d, 0x7f02007e, 0x7f02007f,             0x7f020080, 0x7f020081, 0x7f020082, 0x7f020083, 0x7f020084, 0x7f020085,             0x7f020086, 0x7f020087, 0x7f020088, 0x7f020089, 0x7f02008a, 0x7f02008b,             0x7f02008c, 0x7f02008d, 0x7f02008e, 0x7f02008f, 0x7f020090, 0x7f020091 };       } </pre> <p></p> </span></span></span>    <p><span style="font-family:'宋体';font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;"><span style="font-family:'宋体';font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;font-size:10.5pt;mso-spacerun:'yes';"><span style="font-family:宋体;">自带的电池图标了,何乐不为?</span></span> </span></span></span></span></p>    <p></p>    <h2>让麻雀自食其力——开机启动</h2> 已经在    <a href="/misc/goto?guid=4959517576702229178" rel="nofollow" target="_blank">【</a>    <a href="/misc/goto?guid=4959517576702229178" rel="nofollow" target="_blank">Android</a>    <a href="/misc/goto?guid=4959517576702229178" rel="nofollow" target="_blank">开机启动</a>    <a href="/misc/goto?guid=4959517576702229178" rel="nofollow" target="_blank">Activity</a>    <a href="/misc/goto?guid=4959517576702229178" rel="nofollow" target="_blank">或</a>    <a href="/misc/goto?guid=4959517576702229178" rel="nofollow" target="_blank">Service</a>    <a href="/misc/goto?guid=4959517576702229178" rel="nofollow" target="_blank">的方法】</a>一文中详述,故恕我不再赘述。    <p></p>    <h1>写在最后</h1> 电池监控程序来不断完善自己的小玩意儿,在完善的过程中,就是一次对自己的历练。    <p></p>    <p></p> http://billhoo.blog.51cto.com/2337751/762776    <p></p>