Android 检查设备是否联网

public static boolean isConnect(Context context) { ConnectivityManager connectionManager = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (connectionManager != null) { NetworkInfo info = connectionManager.getActiveNetworkInfo(); if (info != null && info.isConnected()) { if (info.getState() == NetworkInfo.State.CONNECTED) { return true; } } } return false; }