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：

[java] view
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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：

[java] view
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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～～