使用Android Nanohttpd轻量级服务器进行文件目录导航

通过下面的代码，我能够在Android手机上使用Nanohttpd轻量级服务器创建移动服务器。 代码基本上遍历主机android设备的根目录，并将文件和文件夹列为链接。 我想要实现的是当用户点击任何链接（文件夹链接）时，浏览器应显示所单击文件夹链接中包含的文件和文件夹。 我怎么做这个，因为我找不到任何适合初学者的Nanohttpd文档。

import java.io.File; import java.util.Map; import android.annotation.SuppressLint; import android.app.Activity; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.widget.TextView; public class MainActivity extends Activity { private static final int PORT = 8080; private TextView hello; private WebServer server; private Handler handler = new Handler(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); hello = (TextView) findViewById(R.id.hello); } /* * There are some earlier versions of android that can not implement this * method of getting IP address and isEmpty() method. The * * @SupreesLint("NewAPI") helps to suppress the error that will arise in * such devices when implementing these methods . For the application * however, a minimum version of API that can be able to execute the * application flawlessly is set. The enables error checking as lower * version that can not implement this methods wouldn't be able to install * the application. */ @SuppressLint("NewApi") @Override protected void onResume() { super.onResume(); TextView textIpaddr = (TextView) findViewById(R.id.ipaddr); if (Utils.getIPAddress(true).trim().isEmpty()) { textIpaddr.setText(Utils.getIPAddress(false) + ":" + PORT); } else { textIpaddr.setText(Utils.getIPAddress(true) + ":" + PORT); } try { server = new WebServer(); server.start(); } catch (Exception e) { e.printStackTrace(); } } public String intToIp(int i) { return ((i >> 24) & 0xFF) + "." + ((i >> 16) & 0xFF) + "." + ((i >> 8) & 0xFF) + "." + (i & 0xFF); } @Override protected void onPause() { super.onPause(); if (server != null) server.stop(); } private class WebServer extends NanoHTTPD { public WebServer() { super(8080); } @Override public Response serve(String uri, Method method, Map header, Map parameters, Map files) { File rootDir = Environment.getExternalStorageDirectory(); File[] files2 = rootDir.listFiles(); String answer = ""; for (File detailsOfFiles : files2) { answer += "" + detailsOfFiles.getAbsolutePath() + "
"; } answer += ""; return new NanoHTTPD.Response(answer); } } } 

：

Answer 1

您在第一个参数中获得URI。 所以将其附加到具有打开指定目录的路径。 如果您请求192.168.1.6:8080/ABC程序将在外部目录中查找ABC文件夹。

然后检查被采用的项目是文件还是目录，并根据我们更改输出。 运用

 .isFile() 

下面是应该工作的代码：

  .... public Response serve(String uri, Method method, Map header, Map parameters, Map files) { File rootDir = new File( Environment.getExternalStorageDirectory() + File.separator + uri); File[] files2 = rootDir.listFiles(); String answer = ""; for (File detailsOfFiles : files2) { if(detailsOfFiles.isFile()){ answer += detailsOfFiles.getAbsolutePath() + "
"; }else{ answer += "" + detailsOfFiles.getAbsolutePath() + "
"; } } answer += ""; return new NanoHTTPD.Response(answer); } ... 

对不起，解释不好。

Answer 2

经过足够的时间研究NanoHTTPD框架后，我终于想出了如何做到这一点。下面的代码帮助我在主机android设备的目录中导航：

 @Override public Response serve(String uri, Method method, Map header, Map parameters, Map files) { File rootDir = Environment.getExternalStorageDirectory(); File[] filesList = null; String filepath = ""; if (uri.trim().isEmpty()) { filesList = rootDir.listFiles(); } else { filepath = uri.trim(); } filesList = new File(filepath).listFiles(); String answer = ""; if (new File(filepath).isDirectory()) { for (File detailsOfFiles : filesList) { answer += "" + detailsOfFiles.getAbsolutePath() + "
"; } } else { } answer += "" + "uri: " + uri + " \nfiles " + files + " \nparameters " + parameters + " \nheader "; return new NanoHTTPD.Response(answer); } 

响应方法中的uri参数包含该时间点的浏览器URL：示例如果地址栏上显示的url为： /192.168.43.1 : 8080 /storage/sdcard1/ Smadav_2012_Rev._9.0 ,则uri包含/ storage / sdcard1 /Smadav_2012_Rev._9.0。 我所做的就是将uri作为文件路径传递，当然，当uri为空时，第一次连接不是这种情况。