今天找到一个关于获取网络流量不错的资料：

在Android2.2以后，官网已经提供了获取手机网络流量的类:

但是，或许这个类并不能满足要求或者你的Android版本低于2.2。那么可以尝试以下方法。

从系统文件中读取。下面是一直TrafficStats与系统文件的对应表。(其实官方给的API TrafficStats也是从以下文件读取)

下面是一段代码的范例：

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.RandomAccessFile;

import android.util.Log;

public class TrafficStatsFile {

private static final String mobileRxFile_1 = "/sys/class/net/rmnet0/statistics/rx_bytes";

private static final String mobileRxFile_2 = "/sys/class/net/ppp0/statistics/rx_bytes";

private static final String mobileTxFile_1 = "/sys/class/net/rmnet0/statistics/tx_bytes";

private static final String mobileTxFile_2 = "/sys/class/net/ppp0/statistics/tx_bytes";

private static final String LOGGING_TAG = TrafficStatsFile.class.getSimpleName();

public long getMobileRxBytes() {

return tryBoth(mobileRxFile_1, mobileRxFile_2);

}

public long getMobileTxBytes() {

return tryBoth(mobileTxFile_1, mobileTxFile_2);

}

// Return the number from the first file which exists and contains data

private static long tryBoth(String a, String b) {

long num = readNumber(a);

return num >= 0 ? num : readNumber(b);

}

// Returns an ASCII decimal number read from the specified file, -1 on error.

private static long readNumber(String filename) {

try {

RandomAccessFile f = new RandomAccessFile(filename, "r");

try {

Log.d(LOGGING_TAG, "f.length() = " + f.length());

String contents = f.readLine();

if(!contents.isEmpty() && contents!=null) {

try {

return Long.parseLong(contents);

}

catch(NumberFormatException nfex) {

Log.w(LOGGING_TAG, "File contents are not numeric: " + filename);

}

}

else {

Log.w(LOGGING_TAG, "File contents are empty: " + filename);

}

}

catch (FileNotFoundException fnfex) {

Log.w(LOGGING_TAG, "File not found: " + filename, fnfex);

}

catch(IOException ioex) {

Log.w(LOGGING_TAG, "IOException: " + filename, ioex);

}

}catch(FileNotFoundException ffe){

Log.w(LOGGING_TAG, "File not found: " + filename, ffe);

}

return -1;

}

}