Android. Determinar la velocidad de la red durante la reproducción de un vídeo.

Leer cantidad de bytes desde la red wifi.

private long parserNumber(String line) throws Exception {
        long ret=0;
        String[] delim = line.split(" ");
        if(delim.length >= 1){
            ret = Long.parseLong(delim[0]);
        }
        return ret;
    }
   
    public long syncFetchReceivedBytes() {
        // TODO Auto-generated method stub
        ProcessBuilder cmd;
        long readBytes=0;
        BufferedReader rd = null;
        try {
            String[] args = { "/system/bin/cat", "/proc/net/dev" };
            cmd = new ProcessBuilder(args);
            Process process = cmd.start();
            rd = new BufferedReader(new InputStreamReader(
                    process.getInputStream()));
            String line;
            int linecount = 0;
            while ((line = rd.readLine()) != null) {
                linecount++;
                if(line.contains("lan0")||line.contains("eth0")){
                    String[] delim = line.split(":");
                    if(delim.length>=2){
                        readBytes=parserNumber(delim[1].trim());
                        break;
                    }
                }
            }
            rd.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            if (rd != null) {
                try {
                    rd.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        return readBytes;
    }

 

Invocando la función anterior cada segundo

long curReadBytes=syncFetchReceivedBytes();
String strSpeed=(curReadBytes-lastReadBytes)/1024 kbps
lastReadBytes = curReadBytes;