Android实现侦听电池状态显示、电量及充电动态显示的方法

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-windowsplatformsandroid-8data esdrawable），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：

<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

private IntentFilter mIntentFilter;

在oncreate的方法中：加入：

//电池相关 mIntentFilter = new IntentFilter（）; mIntentFilter.addAction（Intent.ACTION_BATTERY_CHANGED）;

3.接收广播

//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：

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

registerReceiver（mIntentReceiver, mIntentFilter）;

5.在onPause方法中注销

unregisterReceiver（mIntentReceiver）;

希望本文所述对大家的Android程序设计有所帮助。