Android(安卓)如何判断手机处于电源充电状态还是USB连接状态？

IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);Intent batteryStatusIntent = registerReceiver(null, ifilter);//如果设备正在充电，可以提取当前的充电状态和充电方式（无论是通过 USB 还是交流充电器），如下所示：// Are we charging / charged?int status = batteryStatusIntent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||        status == BatteryManager.BATTERY_STATUS_FULL;// How are we charging?int chargePlug = batteryStatusIntent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;if (isCharging) {    if (usbCharge) {        Toast.makeText(MainActivity.this, "手机正处于USB连接！", Toast.LENGTH_SHORT).show();    } else if (acCharge) {        Toast.makeText(MainActivity.this, "手机通过电源充电中！", Toast.LENGTH_SHORT).show();    }} else {    Toast.makeText(MainActivity.this, "手机未连接USB线！", Toast.LENGTH_SHORT).show();}

来源：http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2012/1231/761.html

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