判断Android客户端网络是否连接

public static boolean checkNet(Context context) {try {ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);if (connectivity != null) {NetworkInfo info = connectivity.getActiveNetworkInfo();if (info != null && info.isConnected()) {if (info.getState() == NetworkInfo.State.CONNECTED) {return true;}}}} catch (Exception e) {return false;}return false;}

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//打印判断结果System.out.println(checkNet(this));

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另外，一定要加入权限

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

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