Android网络测速

Android 8.1系统新增网络测速功能
自动对附近的WiFi进行测速测试，如果附近的无线网络处于加密状态，Google无权也无法对其进行测速
以4个等级进行评价
慢（Slow）：0-1Mbps，可以使用 WLAN 通话功能、接打电话和收发短信
良好（Ok）：1-5Mbps，可以浏览网页、使用社交媒体软件以及听音乐
快速（Fast）：5-20Mbps，可以观看大部分视频
非常快（Very Fast）：20Mbps以上，可以观看非常高质量的视频

利用Trafficstats流量测速度:上行、下行

   private static long lastTotalRxBytes = 0;
    private static long lastTotalTxBytes = 0;
    private static long lastTimeStamp = 0;

    public static String getNetSpeed(int uid) {
        long nowTotalRxBytes = getTotalRxBytes(uid);
        long nowTotalTxBytes = getTotalTxBytes(uid);
        long nowTimeStamp = System.currentTimeMillis();
        Log.d(TAG, "网络-x----速度-nowTotalTxBytes:" + nowTotalTxBytes+" 时间："+(nowTimeStamp - lastTimeStamp) +"差量："+(nowTotalTxBytes - lastTotalTxBytes)+" nowTotalTxBytes:"+nowTotalTxBytes+" lastTotalTxBytes:"+lastTotalTxBytes);
        long speedRx = ((nowTotalRxBytes - lastTotalRxBytes) * 1000 / (nowTimeStamp - lastTimeStamp));//毫秒转换
        long speedTx = ((nowTotalTxBytes - lastTotalTxBytes) * 1000 / (nowTimeStamp - lastTimeStamp));//毫秒转换
        lastTimeStamp = nowTimeStamp;
        lastTotalRxBytes = nowTotalRxBytes;
        lastTotalTxBytes = nowTotalTxBytes;
        Log.d(TAG, "网络-x-速度下行:" + (speedRx + " kB/s") + " 上行:" + speedTx + " kB/s");
        return speedRx + " kB/s";
    }


    /**
     * 下行 700kB/s 直播临界
     * 实际用到的流量
     * @param uid getApplicationInfo().uid 当前线程
     * @return
     */
    public static long getTotalRxBytes(int uid) {
        return TrafficStats.getUidRxBytes(uid) == TrafficStats.UNSUPPORTED ? 0 : (TrafficStats.getTotalRxBytes() / 1024);//转为KB
    }

    /**
     * 上行实际用到的流量
     * @param uid getApplicationInfo().uid 当前线程
     * @return
     */
    public static long getTotalTxBytes(int uid) {
        return TrafficStats.getUidRxBytes(uid) == TrafficStats.UNSUPPORTED ? 0 : (TrafficStats.getTotalTxBytes() / 1024);//转为KB
    }

在Android 4.3上，速度为0问题：可以用以下方法获取

private Long getTotalBytesManual(int localUid){
 
File dir = new File("/proc/uid_stat/");
String[] children = dir.list();
if(!Arrays.asList(children).contains(String.valueOf(localUid))){
    return 0L;
}
File uidFileDir = new File("/proc/uid_stat/"+String.valueOf(localUid));
File uidActualFileReceived = new File(uidFileDir,"tcp_rcv");
File uidActualFileSent = new File(uidFileDir,"tcp_snd");
 
 String textReceived = "0";
 String textSent = "0";
 
 try {
        BufferedReader brReceived = new BufferedReader(new FileReader(uidActualFileReceived));
        BufferedReader brSent = new BufferedReader(new FileReader(uidActualFileSent));
        String receivedLine;
        String sentLine;
 
        if ((receivedLine = brReceived.readLine()) != null) {
            textReceived = receivedLine;
        }
        if ((sentLine = brSent.readLine()) != null) {
            textSent = sentLine;
        }
 
    }
    catch (IOException e) {
 
    }
 return Long.valueOf(textReceived).longValue() + Long.valueOf(textSent).longValue();
 }