本文实例讲述了android实现侦听电池状态显示、电量及充电动态显示的方法，是android应用程序开发中非常常用的重要功能。分享给大家供大家参考之用。具体方法如下：
使用android系统的电池侦听和系统的电池图片如下；
引入源代码中的两个xml文件（这里我在android2.2的jar包中找不到，所以才引入，源代码路径：c:\android-sdk-windows\platforms\android-8\data\res\drawable），之后会发现stat_sys_battery.xml报错，如下图所示：
1.这些图引入到我的drawable目录下，然后将stat_sys_battery.xml中的图片引入路径更改，如下：
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<level-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:maxlevel="4" android:drawable="@drawable/stat_sys_battery_0" /> <item android:maxlevel="14" android:drawable="@drawable/stat_sys_battery_10" /> <item android:maxlevel="29" android:drawable="@drawable/stat_sys_battery_20" /> <item android:maxlevel="49" android:drawable="@drawable/stat_sys_battery_40" /> <item android:maxlevel="69" android:drawable="@drawable/stat_sys_battery_60" /> <item android:maxlevel="89" android:drawable="@drawable/stat_sys_battery_80" /> <item android:maxlevel="100" android:drawable="@drawable/stat_sys_battery_100" /> </level-list> |
2.接下来是在activity中的操作：
创建一个intentfilter
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private intentfilter mintentfilter; |
在oncreate的方法中：加入：
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//电池相关 mintentfilter = new intentfilter(); mintentfilter.addaction(intent.action_battery_changed); |
3.接收广播
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//声明消息处理过程 private broadcastreceiver mintentreceiver = new broadcastreceiver() { @override public void onreceive(context context, intent intent) { string action = intent.getaction(); int status = intent.getintextra("status", 0); int health = intent.getintextra("health", 0); boolean present = intent.getbooleanextra("present", false); int level = intent.getintextra("level", 0); int scale = intent.getintextra("scale", 0); int icon_small = intent.getintextra("icon-small", 0); int plugged = intent.getintextra("plugged", 0); int voltage = intent.getintextra("voltage", 0); int temperature = intent.getintextra("temperature", 0); string technology = intent.getstringextra("technology"); string statusstring = ""; switch (status) { case batterymanager.battery_status_unknown: statusstring = "unknown"; break; case batterymanager.battery_status_charging: statusstring = "charging"; battery_image.setimageresource(r.drawable.stat_sys_battery_charge); battery_image.getdrawable().setlevel(level); break; case batterymanager.battery_status_discharging: statusstring = "discharging"; battery_image.setimageresource(r.drawable.stat_sys_battery); battery_image.getdrawable().setlevel(level); break; case batterymanager.battery_status_not_charging: statusstring = "not charging"; break; case batterymanager.battery_status_full: statusstring = "full"; break; } string healthstring = ""; switch (health) { case batterymanager.battery_health_unknown: healthstring = "unknown"; break; case batterymanager.battery_health_good: healthstring = "good"; break; case batterymanager.battery_health_overheat: healthstring = "overheat"; break; case batterymanager.battery_health_dead: healthstring = "dead"; break; case batterymanager.battery_health_over_voltage: healthstring = "voltage"; break; case batterymanager.battery_health_unspecified_failure: healthstring = "unspecified failure"; break; } string acstring = ""; switch (plugged) { case batterymanager.battery_plugged_ac: acstring = "plugged ac"; break; case batterymanager.battery_plugged_usb: acstring = "plugged usb"; break; } log.i("cat", statusstring); log.i("cat", healthstring); log.i("cat", string.valueof(present)); log.i("cat", string.valueof(level)); log.i("cat", string.valueof(scale)); log.i("cat", string.valueof(icon_small)); log.i("cat", acstring); log.i("cat", string.valueof(voltage)); log.i("cat", string.valueof(temperature)); log.i("cat", technology); //要看看是不是我们要处理的消息 if (action.equals(intent.action_battery_changed)) { //电池电量，数字 log.d("battery", "" + intent.getintextra("level", 0)); //电池最大容量 log.d("battery", "" + intent.getintextra("scale", 0)); //电池伏数 log.d("battery", "" + intent.getintextra("voltage", 0)); //电池温度 log.d("battery", "" + intent.getintextra("temperature", 0)); //电池状态，返回是一个数字 // batterymanager.battery_status_charging 表示是充电状态 // batterymanager.battery_status_discharging 放电中 // batterymanager.battery_status_not_charging 未充电 // batterymanager.battery_status_full 电池满 log.d("battery", "ss" + intent.getintextra("status", batterymanager.battery_status_charging)); //充电类型 batterymanager.battery_plugged_ac 表示是充电器，不是这个值，表示是 usb log.d("battery", "" + intent.getintextra("plugged", 0)); //电池健康情况，返回也是一个数字 //batterymanager.battery_health_good 良好 //batterymanager.battery_health_overheat 过热 //batterymanager.battery_health_dead 没电 //batterymanager.battery_health_over_voltage 过电压 //batterymanager.battery_health_unspecified_failure 未知错误 log.d("battery", "" + intent.getintextra("health", batterymanager.battery_health_unknown)); } } }; |
这里真正处理图片变换的是以下几句话：
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switch (status) { case batterymanager.battery_status_unknown: statusstring = "unknown"; break; case batterymanager.battery_status_charging: statusstring = "charging"; battery_image.setimageresource(r.drawable.stat_sys_battery_charge); battery_image.getdrawable().setlevel(level); break; case batterymanager.battery_status_discharging: statusstring = "discharging"; battery_image.setimageresource(r.drawable.stat_sys_battery); battery_image.getdrawable().setlevel(level); break; case batterymanager.battery_status_not_charging: statusstring = "not charging"; break; case batterymanager.battery_status_full: statusstring = "full"; break; } |
4.在onresume方法中注册消息处理器
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registerreceiver(mintentreceiver, mintentfilter); |
5.在onpause方法中注销
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unregisterreceiver(mintentreceiver); |
希望本文所述对大家的android程序设计有所帮助。
