Android(安卓)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 plain copy

publicstaticlonggetNetworkSpeed(Contextcontext){
ProcessBuildercmd;
longreadBytes=0;
BufferedReaderbufferReader=null;
try{
String[]args={"/system/bin/cat","/proc/net/dev"};
cmd=newProcessBuilder(args);
Processprocess=cmd.start();
bufferReader=newBufferedReader(newInputStreamReader(process.getInputStream()));
Stringline;
while((line=bufferReader.readLine())!=null){
if(line.contains("wlan0")&&isWiFiNetworkAvailable(context)){
String[]delim=line.split(":");
if(delim.length>=2){
Stringvalues=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){
Stringvalues=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(Exceptionex){
ex.printStackTrace();
}finally{
if(bufferReader!=null){
try{
bufferReader.close();
}catch(IOExceptione){
e.printStackTrace();
}
}
}
returnreadBytes;
}
//处理字符串数据的
privatestaticStringnSpace2one(Strings){
StringregEx="['']+";//一个或多个空格
Patternp=Pattern.compile(regEx);
Matcherm=p.matcher(s);
Stringret=m.replaceAll(",").trim();
returnret;
}
publicstaticbooleanisWiFiNetworkAvailable(Contextcontext){
booleannetSataus=false;
ConnectivityManagercm=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfonetinfo=cm.getActiveNetworkInfo();
if(netinfo!=null&&netinfo.getType()==ConnectivityManager.TYPE_WIFI){
netSataus=netinfo.isAvailable();
}
returnnetSataus;
}
publicstaticbooleanisNetworkAvailable(Contextcontext){
booleannetSataus=false;
ConnectivityManagercm=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfonetinfo=cm.getActiveNetworkInfo();
if(netinfo!=null){
netSataus=netinfo.isAvailable();
}
returnnetSataus;
}

在Activity或fragment中调用上述工具类的方法：

[java] view plain copy

privatelonglastTimeSpeed=0;
privateTextViewshowNetWorkSpeed;
privateHandlermHandler=newHandler();
privateRunnableupdateCurrentNetWorkSpeed=newRunnable(){
publicvoidrun(){
longgetDataFlow=Utility.getNetworkSpeed(xxxActivity.this)/1024;//xxxActivity是你当前的Activity
if(lastTimeSpeed==0){
lastTimeSpeed=getDataFlow;
}
longshowSpeed=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～～

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