要检查设备与AC / USB 充电，让我们试试这个，

To check device charging with AC / USB, Lets try this,

呼叫 registerReceiver（空，新的IntentFilter（Intent.ACTION_BATTERY_CHANGED））。这将返回对 BatteryManager 定义额外让你知道，如果它是在插入或不是意图。

Call registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED)). This will return an Intent that has extras defined on BatteryManager to let you know if it is plugged in or not.

一些与code，

public class PowerUtil {
    public static boolean isConnected(Context context) {
        Intent intent = context.registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
        int plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
        return plugged == BatteryManager.BATTERY_PLUGGED_AC || plugged == BatteryManager.BATTERY_PLUGGED_USB;
    }
}