充电状态和BatteryManager

我们可以通过如下代码获取现在的充电状态是否为AC充电。

IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batteryStatus = this.registerReceiver(null, filter);（http://www.amjmh.com/v/BIBRGZ_558768/）
int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
boolean acCharge = (chargePlug == BatteryManager.BATTERY_PLUGGED_AC);
if (acCharge) {
Log.v(LOG_TAG,“The phone is charging!”);
}
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得到充电的状态之后我们可以有针对性的做一些操作，比如在充电时执行一些耗时的代码。

private boolean checkForPower() {
// It is very easy to subscribe to changes to the battery state, but you can get the current
// state by simply passing null in as your receiver. Nifty, isn't that?
IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batteryStatus = this.registerReceiver(null, filter);

// There are currently three ways a device can be plugged in. We should check them all.
int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
boolean usbCharge = (chargePlug == BatteryManager.BATTERY_PLUGGED_USB);
boolean acCharge = (chargePlug == BatteryManager.BATTERY_PLUGGED_AC);
boolean wirelessCharge = false;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
wirelessCharge = (chargePlug == BatteryManager.BATTERY_PLUGGED_WIRELESS);
}
return (usbCharge || acCharge || wirelessCharge);
}
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上面代码可以得到现在是否充电。
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