工具-网络

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Android 使用ping判断网络/WIFI连接是否可用

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/**
 * Android 使用ping判断网络/WIFI连接是否可用
 */
public boolean isNetworkOnline() {
    Runtime runtime = Runtime.getRuntime();
    Process ipProcess = null;
    try {
        //ping -c 5 -w 4 api.597.com
        //-c 后边跟随的是重复的次数，-w后边跟随的是超时的时间，单位是秒，不是毫秒
        ipProcess = runtime.exec("ping -c 5 -w 4 api.597.com");
        InputStream input = ipProcess.getInputStream();

        BufferedReader in = new BufferedReader(new InputStreamReader(input));
        StringBuffer stringBuffer = new StringBuffer();
        String content = "";
        while ((content = in.readLine()) != null) {
            stringBuffer.append(content);
        }
        DebugLog.log(stringBuffer.toString());

        int exitValue = ipProcess.waitFor();
        if (exitValue == 0) {
            //WiFi连接，网络正常
            return true;
        } else {
            if (stringBuffer.indexOf("100% packet loss") != -1) {
                //网络丢包严重，判断为网络未连接
                return false;
            } else {
                //网络未丢包，判断为网络连接
                return true;
            }
        }
    } catch (IOException | InterruptedException e) {
        e.printStackTrace();
    } finally {
        if (ipProcess != null) {
            ipProcess.destroy();
        }
        runtime.gc();
    }
    return false;
}