Android 学习笔记之二 Netspeed

今天看项目源码发现获取Android网速有问题，就此改了一下，做个笔记留给自己看。

下面代码放在工具类里：

 public static long getNetworkSpeed(Context context) {
     ProcessBuilder cmd;
     long readBytes = 0;
     BufferedReader bufferReader = null;
     try {
         String[] args = { "/system/bin/cat", "/proc/net/dev" };
         cmd = new ProcessBuilder(args);
         Process process = cmd.start();
         bufferReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
         String line;
         while ((line = bufferReader.readLine()) != null) {
             if (line.contains("wlan0") && isWiFiNetworkAvailable(context)) {
                 String[] delim = line.split(":");
                 if (delim.length >= 2) {
                     String values = delim[1].trim();
                     values = nSpace2one(values);
                     String[] numbers = values.split(",");// 提取数据
                     readBytes = Long.parseLong(numbers[0].trim());
                     readBytes += Long.parseLong(numbers[8].trim());
                     break;
                 }
             }
             if (line.contains("eth0") && isEthernetNetworkAvailable(context)) {
                 String[] delim = line.split(":");
                 if (delim.length >= 2) {
                     String values = delim[1].trim();
                     values = nSpace2one(values);
                     String[] numbers = values.split(",");
                     readBytes = Long.parseLong(numbers[0].trim());
                     readBytes += Long.parseLong(numbers[8].trim());
                     break;
                 }
             }
         }
         bufferReader.close();
     } catch (Exception ex) {
         ex.printStackTrace();
     } finally {
         if (bufferReader != null) {
             try {
                 bufferReader.close();
             } catch (IOException e) {
                 e.printStackTrace();
             }
         }
     }
     return readBytes;
 }
 //处理字符串数据的
 private static String nSpace2one(String s) {
     String regEx = "[' ']+"; // 一个或多个空格
     Pattern p = Pattern.compile(regEx);
     Matcher m = p.matcher(s);
     String ret = m.replaceAll(",").trim();
     return ret;
 }

 public static boolean isWiFiNetworkAvailable(Context context) {
     boolean netSataus = false;
     ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
     NetworkInfo netinfo = cm.getActiveNetworkInfo();
     if (netinfo != null && netinfo.getType() == ConnectivityManager.TYPE_WIFI) {
         netSataus = netinfo.isAvailable();
     }
     return netSataus;
 }

 public static boolean isNetworkAvailable(Context context) {
     boolean netSataus = false;
     ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
     NetworkInfo netinfo = cm.getActiveNetworkInfo();
     if (netinfo != null) {
         netSataus = netinfo.isAvailable();
     }
     return netSataus;
 }

在Activity或fragment中调用上述工具类的方法：

 private long lastTimeSpeed = 0;
 private TextView showNetWorkSpeed;
 private Handler mHandler = new Handler();
 private Runnable updateCurrentNetWorkSpeed = new Runnable() {
     public void run() {
         long getDataFlow = Utility.getNetworkSpeed(xxxActivity.this) / 1024;//xxxActivity是你当前的Activity
         if(lastTimeSpeed==0){
             lastTimeSpeed = getDataFlow;
         }
         long showSpeed = getDataFlow - lastTimeSpeed;
         lastTimeSpeed = getDataFlow;
         showNetWorkSpeed.setText(showSpeed+"k/s");
         mHandler.postDelayed(updateCurrentNetWorkSpeed, 1000);
     }
 }

其实这里的getNetworkSpeed方法返回的并非当前网速，而是流量总值～～～

获取流量的方法并不是我写的。欢迎各位大神指出问题，指导下哈～～