title: Read multiple txt files and sort them out android
body: <p>I got a little problem.
  I got a map (on android phone) called "Save", in that folder I got several .txt files.</p>
  
  <p>I know how to enter the folder, and I can read 1 txt file (hardcoded) but I want it to be dynamic.</p>
  
  <p>I want somehting like this:</p>
  
  <pre><code>public void onClick(View v) {
  
               File root = Environment.getExternalStorageDirectory();
  
               save = root.toString()+"/Save/";
  
                  if (save.startsWith("3_test")){
                      System.out.println("FOUND!");
                  } else {
                      System.out.println("NOT FOUND!");
                  }
  
          }
  </code></pre>
  
  <p>I got a txt file called 3_test.txt but he can't find it this way, if I do it hardcoded it does find it.</p>
  
  <p>The problem is that I don't know how to "scan" all files in the folder Save and then put an "if" check over it.</p>
  
  <p>Hope someone can help me with this.</p>