Android - 如何从 url 读取文本文件？

我将一个文本文件（*.txt）上传到服务器，现在我想读取该文本文件...

我尝试了这个例子，但没有运气。

ArrayList<String> urls=new ArrayList<String>(); //to read each line
TextView t; //to show the result
try {
        // Create a URL for the desired page
        URL url = new URL("mydomainname.de/test.txt"); //My text file location
        // Read all the text returned by the server
         BufferedReader in = new BufferedReader(new     InputStreamReader(url.openStream()));

    t=(TextView)findViewById(R.id.TextView1);
    String str;
    while ((str = in.readLine()) != null) {
        urls.add(str);


    }
    in.close();
   } catch (MalformedURLException e) {
  } catch (IOException e) {
 }
 t.setText(urls.get(0)); // My TextFile has 3 lines 

应用程序正在自行关闭... 可以由域名决定吗？应该有IP吗？ 我发现 while 循环没有执行。 因为如果我将 t.setText* 放入 while 循环中，则不会出现错误，并且 TextView 为空。 LogCat 错误：http://textuploader.com/5iijr它突出显示该行t.setText(urls.get(0));

提前致谢 ！！！

尝试使用 HTTPUrlConnection 或 OKHTTP 请求来获取信息，请尝试以下操作：

始终在后台线程中执行任何类型的网络操作，否则 android 将抛出 NetworkOnMainThread 异常

new Thread(new Runnable(){

  public void run(){


    ArrayList<String> urls=new ArrayList<String>(); //to read each line
    //TextView t; //to show the result, please declare and find it inside onCreate()



    try {
         // Create a URL for the desired page
         URL url = new URL("http://somevaliddomain.com/somevalidfile"); //My text file location
         //First open the connection 
         HttpURLConnection conn=(HttpURLConnection) url.openConnection();
         conn.setConnectTimeout(60000); // timing out in a minute

         BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));

         //t=(TextView)findViewById(R.id.TextView1); // ideally do this in onCreate()
        String str;
        while ((str = in.readLine()) != null) {
            urls.add(str);
        }
        in.close();
    } catch (Exception e) {
        Log.d("MyTag",e.toString());
    } 

    //since we are in background thread, to post results we have to go back to ui thread. do the following for that

    Activity.this.runOnUiThread(new Runnable(){
      public void run(){
          t.setText(urls.get(0)); // My TextFile has 3 lines
      }
    });

  }
}).start();