Android 學習筆記之二 Netspeed

今天看項目源碼發現獲取Android網速有問題，就此改了一下，做個筆記留給自己看。

下面代碼放在工具類裏：

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(",");// 提取數據
                    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;
}
//處理字符串數據的
private static String nSpace2one(String s) {
    String regEx = "[' ']+"; // 一個或多個空格
    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中調用上述工具類的方法：

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是你當前的Activity
        if(lastTimeSpeed==0){
            lastTimeSpeed = getDataFlow;
        }
        long showSpeed = getDataFlow - lastTimeSpeed;
        lastTimeSpeed = getDataFlow;
        showNetWorkSpeed.setText(showSpeed+"k/s");
        mHandler.postDelayed(updateCurrentNetWorkSpeed, 1000);
    }
}

其實這裏的getNetworkSpeed方法返回的並非當前網速，而是流量總值～～～

獲取流量的方法並不是我寫的。歡迎各位大神指出問題，指導下哈～～