title: App isn't responding after pressing play button
body: <p>So I have created a very basic drum machine that should play snare sounds in a loop when I press play, only when the toggle buttons are on until I press stop. Here is the main code of the play() method :</p>
  
  <pre><code>   public void play() {
  
          playing = true; 
          while (playing) {
              if (button1.isChecked()) {
                  sp.play(snareId, 10, 10, 1, 0, 1);
                  if (!playing) {
                      break;
                  }
                  try {
                      Thread.sleep(60000 / (120 * 4)); 
                  } catch (InterruptedException e) {
                      e.printStackTrace();
                  }
                  if (button2.isChecked()) {
                      sp.play(snareId, 10, 10, 1, 0, 1);
                      if (!playing) {
                          break;
                      }
                      try {
                          Thread.sleep(60000 / (120 * 4));
                      } catch (InterruptedException e) {
                          e.printStackTrace();
                      }
                      if (button3.isChecked()) {
                          sp.play(snareId, 10, 10, 1, 0, 1);
                          if (!playing) {
                              break;
                          }
                          try {
                              Thread.sleep(60000 / (120 * 4));
                          } catch (InterruptedException e) {
                              e.printStackTrace();
                          }
                          if (button4.isChecked()) {
                              sp.play(snareId, 10, 10, 1, 0, 1);
                              if (!playing) {
                                  break;
                              }
                              try {
                                  Thread.sleep(60000 / (120 * 4));
                              } catch (InterruptedException e) {
                                  e.printStackTrace();
                              }
                          } 
                      } 
                  } 
              }
          }
      }
  </code></pre>
  
  <p>The problem is, when i press play, the app stop responding, i can't even press the stop button and i only here 1 snare sound even if i toggle more than 1 button and it doesn't seem to loop either since i only hear it once. So i'd like to know if my play() method is wrong and how can i fix the problem.</p>
  
  <p>Thanks</p>