如何在JAVA中获取上传速度

Question

我正在学习android应用程序，我想构建示例代码来检查上传速度。

我已经建立了上传速度检查方法，但我不确定它是否正常工作。这是因为我的方法返回上传速度即使Android手机没有正确的互联网连接

我建的方法如..

首先，阅读4.6 MB文本文件，然后存储到字符串变量

其次，检查开始时间

三，使用post方法和对的NameValuePair 4.6MB字符串变量发送到谷歌应用程序引擎（我的谷歌应用程序引擎，它正赶上字符串数据。它不会做任何事情。）

四，检查结束时间

最后，获得（文件大小）/（结束时间 - 开始时间）上传速度

这里是我的代码...

public double Get_UPload_Speed() throws IOException{ 
    String file_path =("46.txt"); 
    File gone = new File(file_path); 
    String line = ""; 
    double filesize = bts.Get_File_Size(file_path); 
    int maxsize = rf.Get_Total_Line(file_path); 
    BufferedReader in = new BufferedReader(new FileReader(gone)); 

    HttpPost httpPost = new HttpPost("http://google.app.engine.address.com"); 
    List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2); 
    StringBuilder stringBuilder = new StringBuilder(); 


    for(int index = 0 ; index < maxsize ; index++){ 
     if((line = in.readLine()) != null){ 
      // keep appending line of text to String buffer 
      stringBuilder.append(line);   
     } 
     else{ 
      break; 
     } 
    } 
    String UL_Packet = stringBuilder.toString(); 
    double startTime = System.currentTimeMillis(); 
    nameValuePair.add(new BasicNameValuePair("content",UL_Packet)); 
    nameValuePair.add(new BasicNameValuePair("guestbookName", "default")); 
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair)); 
      Log.d("UploadManager", "Upload Start: " + startTime + " secs"); 
     Log.d("UploadManager", "Upload End: " + endTime + " secs"); 
     Log.d("UploadManager", "Tranfer Time: " + tranferTime + " secs"); 
     Log.d("UploadManager", "Size of file " + filesize + " MB"); 
     double endTime = System.currentTimeMillis(); 
     double tranferTime = (endTime - startTime)/1000; 
     double rate = filesize/ tranferTime;   
     Log.d("UploadManager", "Upload speed: "+rate +" Mbps"); 
     return rate; 
    } 

但是，我不确定这是否是获得上传速度的正确方法。

建立上传速度检查方法有没有可靠的方法？

感谢

Answer 1

你有没有尝试使用Android TrafficStats？

/** Upload a random string and measure transfer speed */ 
public double Get_UPload_Speed() 
    throws IOException 
{ 
    int  MB   = 1; 
    HttpPost httpPost = new HttpPost("http://google.app.engine.address.com"); 
    HttpClient httpClient = DefaultHttpClient(); 

    /** generate random string */ 
    char[] chars = "abcdefghijklmnopqrstuvwxyz1234567890"; 
    StringBuilder sb  = new StringBuilder(); 
    Random  random = new Random(); 
    for (int i = 0; i < MB*1024*1024; i++) { 
     sb.append(
       chars[random.nextInt(chars.lenght)]); 
    } 

    long totalTxBytes = TrafficStats.getTotalTxBytes(); 
    long totalRxBytes = TrafficStats.getTotalRxBytes(); 
    double startTime = System.currentTimeMillis(); 

    String UL_Packet = sb.toString(); 
    List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2); 
    nameValuePair.add(
      new BasicNameValuePair("content",UL_Packet)); 
    nameValuePair.add(
      new BasicNameValuePair("guestbookName", "default")); 
    httpPost.setEntity(
      new UrlEncodedFormEntity(nameValuePair)); 

    httpClient.execute(httpPost); 

    double endTime = System.currentTimeMillis(); 
    double tranferTime = (endTime - startTime)/1000; 

    double rate = 
     ( TrafficStats.getTotalTxBytes() - totalTxBytes 
     + TrafficStats.getTotalRxBytes() - totalRxBytes)/tranferTime;   

    /** Log */ 
    Log.d("UploadManager", "Upload Start: " + startTime   ); 
    Log.d("UploadManager", "Upload End: " + endTime    ); 
    Log.d("UploadManager", "Tranfer Time: " + tranferTime + " secs"); 
    Log.d("UploadManager", "Data size: " + MB   + " MB "); 
    Log.d("UploadManager", "Upload speed: " + rate  + " MB/s"); 

    return rate; 
}