Android网络检测

检测管理，网络接口请求超时的时候可用调用单例的checkNetworkStatus方法

public class NetworkTimeoutManager {
    private volatile static NetworkTimeoutManager ourInstance = null;
    private volatile static boolean isChecking = false;

    private NetworkTimeoutManager() {

    }

    public static NetworkTimeoutManager getInstance() {
        if (ourInstance == null) {
            synchronized (NetworkTimeoutManager.class) {
                if (ourInstance == null) {
                    ourInstance = new NetworkTimeoutManager();
                }
            }
        }
        return ourInstance;
    }

    public void checkNetworkStatus() {
        if (isChecking) {
            return;
        }
        isChecking = true;
        boolean pingSuccess = NetworkUtil.ping(10, 1, "223.5.5.5");
        if (pingSuccess) {
            //自身业务需要，服务器故障
            SessionManager.getInstance().checkServerError(new DataObserver<VoidResp>() {
                @Override
                public void onNext(VoidResp response) {
                    isChecking = false;
                }

                @Override
                public void onError(Throwable e) {
                    EventDispatcher.get().postEvent(new NetworkManager.checkServerErrorEvent());
                    isChecking = false;
                }
            });
        } else {
            EventDispatcher.get().postEvent(new NetworkManager.checkServerErrorEvent());
            isChecking = false;
        }
    }

工具类方法

/**
     * ping网络
     *
     * @param count ping次数  10
     * @param time  超时时间(秒) 1
     * @param url   地址
     * @return 是否成功
     */
    public static boolean ping(int count, int time, String url) {
        if (url == null || url.length() <= 0) {
            url = "223.5.5.5";// 阿里巴巴公共ip
        }
        String str = "ping -c " + count +
                " -W " + time +
                " " + url;
        Runtime runtime = Runtime.getRuntime();     //新开一个进程执行脚本命令
        Process ipProcess = null;
        try {
            ipProcess = runtime.exec(str);
            InputStream input = ipProcess.getInputStream();
            BufferedReader in = new BufferedReader(new InputStreamReader(input));
            StringBuilder stringBuilder = new StringBuilder();
            String content;
            while ((content = in.readLine()) != null) {
                stringBuilder.append(content);
            }
            int exitValue = ipProcess.waitFor();
            if (exitValue == 0) {//0标识正常结束返回
                //网络正常
                return true;
            } else {
                //网络丢包严重，判断为网络未连接
                //网络未丢包，判断为网络连接
                return stringBuilder.indexOf("100% packet loss") == -1;
            }
        } catch (IOException | InterruptedException e) {
            Logger.onJAVAError(e);
        } finally {
            //调用runtime执行脚本是非常消耗资源的，所以切忌不要频繁使用，使用完回收
            if (ipProcess != null) {
                ipProcess.destroy();
            }
            runtime.gc();
        }
        return false;
    }