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-8dataresdrawable），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。
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