android – 检测正在插入的设备

显然,ACTION_BATTERY_CHANGED是一个“粘性广播”,这意味着你可以在广播后随时注册并接收它.要获得插入状态,您可以执行以下操作：

public void onCreate() {
    BroadcastReceiver receiver = new BroadcastReceiver() {
        public void onReceive(Context context,Intent intent) {
            int plugged = intent.getIntextra(Batterymanager.EXTRA_PLUGGED,-1);
            if (plugged == Batterymanager.bATTERY_PLUGGED_AC) {
                // on AC power
            } else if (plugged == Batterymanager.bATTERY_PLUGGED_USB) {
                // on USB power
            } else if (plugged == 0) {
                // on battery power
            } else {
                // intent didnt include extra info
            }
        }
    };
    IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
    registerReceiver(receiver,filter);
}