判断android网络是否可用

public boolean isNetworkAvailable() {Context context = getApplicationContext();ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE);if (connectivity == null) {} else {NetworkInfo[] info = connectivity.getAllNetworkInfo();if (info != null) {for (int i = 0; i < info.length; i++) {if (info[i].getState() == NetworkInfo.State.CONNECTED) {return true;}}}}return false;}

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使用方法

if (!isNetworkAvailable()) {System.out.println("没有网络连接");} else {System.out.println("网络连接可用");}