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原理

使用ping -n -i %f -c %d %s命令实现网络质量检测，具体参数如下：
-n count 发送 count 指定的 ECHO 数据包数。默认值为 4
-i 生存时间
-c 路由隔离仓标识符

如图ping后返回的最后一行可以看到min/avg/max/stddev，我们主要从avg来判断当前的网络质量
在这里插入图片描述

使用

1. 通过Ping.startSniffer方法开始调用,urls规则可以看Ping里面的getIp方法，从第7位开始到下一个":"截至，获取具体域名来ping

Ping.startSniffer("https://www.baidu.com:");

2. 在startSniffer中需要自己实现回调等方式把PingQuality.getQualityInt(s)获取的网络质量结果抛出

核心代码

使用ping命令获取返回的string，然后解析后获取到avg来判断网络质量。

private static PingResult pingCmd(String address, int count, int interval) {String ip = null;try {ip = getIp(address);} catch (UnknownHostException e) {
//            Log.e(TAG, "parseResult", e);}if (ip == null) {sleepTime = 2000;return new PingResult("", address, "", 0);} else {sleepTime = 200;}String cmd = String.format(Locale.US, "ping -n -i %f -c %d %s", ((double) interval / 1000), count, ip);Process process = null;StringBuilder str = new StringBuilder();BufferedReader reader = null;BufferedReader errorReader = null;try {process = Runtime.getRuntime().exec(cmd);reader = new BufferedReader(new InputStreamReader(process.getInputStream()));String line;errorReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));while ((line = reader.readLine()) != null) {str.append(line).append("\n");}while ((line = errorReader.readLine()) != null) {str.append(line);}} catch (IOException e) {Log.e(TAG, "pingCmd", e);} finally {try {if (reader != null) {reader.close();}if (errorReader != null) {errorReader.close();}if (process != null) {process.destroy();}} catch (Exception e) {Log.e(TAG, "pingCmd", e);}}return new PingResult(str.toString(), address, ip, interval);}

public static class PingResult {public final String result;public final String ip;public final String address;public final int interval;private static final String LAST_LINE_PREFIX = "rtt min/avg/max/mdev = ";private static final String PACKET_WORDS = " packets transmitted";private static final String RECEIVED_WORDS = " received";private static final String LOSS_WORDS = "% packet loss";public int sent;public int packetLoss = -1;public int dropped;public float max;public float min;public float avg;public float stddev;public int count;public int avgNumber;public int lostNumber;PingResult(String result, String address, String ip, int interval) {this.result = result;this.ip = ip;this.interval = interval;this.address = address;parseResult();}static String trimNoneDigital(String s) {if (s == null || s.length() == 0) {return "";}char[] v = s.toCharArray();char[] v2 = new char[v.length];int j = 0;for (char aV : v) {if ((aV >= '0' && aV <= '9') || aV == '.') {v2[j++] = aV;}}return new String(v2, 0, j);}private void parseRttLine(String s) {String s2 = s.substring(LAST_LINE_PREFIX.length(), s.length() - 3);String[] l = s2.split("/");if (l.length != 4) {return;}min = Float.parseFloat(trimNoneDigital(l[0]));avg = Float.parseFloat(trimNoneDigital(l[1]));max = Float.parseFloat(trimNoneDigital(l[2]));stddev = Float.parseFloat(trimNoneDigital(l[3]));}private void parsePacketLine(String s) {String[] l = s.split(",");if (l.length != 4) {return;}if (l[0].length() > PACKET_WORDS.length()) {String s2 = l[0].substring(0, l[0].length() - PACKET_WORDS.length());count = Integer.parseInt(s2);}if (l[1].length() > RECEIVED_WORDS.length()) {String s3 = l[1].substring(0, l[1].length() - RECEIVED_WORDS.length());sent = Integer.parseInt(s3.trim());}if (l[2].length() > LOSS_WORDS.length()) {String s4 = l[2].substring(0, l[2].length() - LOSS_WORDS.length());packetLoss = Integer.parseInt(s4.trim());}dropped = count - sent;}private void parseResult() {String[] rs = result.split("\n");try {for (String s : rs) {if (s.contains(PACKET_WORDS)) {parsePacketLine(s);} else if (s.contains(LAST_LINE_PREFIX)) {parseRttLine(s);}}} catch (Exception e) {Log.e(TAG, "parseResult", e);}}@Overridepublic String toString() {if (avg == 1) {avgNumber = 0;} else if (avg > 1 && avg <= 15) {avgNumber = 1;} else if (avg > 15 && avg <= 55) {avgNumber = 2;} else if (avg > 55 && avg <= 140) {avgNumber = 3;} else if (avg > 140 && avg <= 420) {avgNumber = 4;} else if (avg > 420) {avgNumber = 5;} else {avgNumber = 6;}if (packetLoss == 0) {lostNumber = 0;} else if (packetLoss > 0 && packetLoss <= 2) {lostNumber = 1;} else if (packetLoss > 2 && packetLoss <= 5) {lostNumber = 2;} else if (packetLoss > 5 && packetLoss <= 8) {lostNumber = 3;} else if (packetLoss > 8 && packetLoss <= 13) {lostNumber = 4;} else if (packetLoss > 13) {lostNumber = 5;} else {lostNumber = 6;}Log.e("ping", "avg: " + avg + "  packetLoss: " + packetLoss);if (lostNumber > avgNumber) {return PingQuality.getDescription(lostNumber);} else {return PingQuality.getDescription(avgNumber);}
//            return "Result{" +
//                    "result='" + result + '\'' +
//                    ", ip='" + ip + '\'' +
//                    ", interval=" + interval +
//                    ", lastLinePrefix='" + LAST_LINE_PREFIX + '\'' +
//                    ", packetWords='" + PACKET_WORDS + '\'' +
//                    ", receivedWords='" + RECEIVED_WORDS + '\'' +
//                    ", sent=" + sent +
//                    ", dropped=" + dropped +
//                    ", max=" + max +
//                    ", min=" + min +
//                    ", avg=" + avg +
//                    ", stddev=" + stddev +
//                    ", count=" + count +
//                    ", packetLoss=" + packetLoss +
//                    '}';}}