title: How to stop or exit "Runnable"
body: <p>I'm new to android.I'm building app to listen incoming message over WiFi , it works fine for listening and updating UI but when i try to exit it doesn't respond to back button press until it receive message in buffer. From my understanding, buttons are on UI thread and Runnable is a separate thread and that's why it doesn't respond to button press immediately coz its busy on separate thread. So how can i interrupt "Runnable" from back button press?</p>
  
  <p>Any help would be much appreciated. </p>
  
  <pre><code>public Runnable mUpdate = new Runnable() {
      public void run() {            
          try {   
              line = in.readLine();
              newtext.setText(line);
              mHandler.post(this);
              Log.i("RESPONSE FROM SERVER", "S: Received Message: '" +line+ "'");
  
              //onBackPressed();
              //threadRunning = true;
          } catch (IOException e) {
              // TODO Auto-generated catch block
              Log.e("Error" , "Something Happen");    
          }
      }
  };  
  </code></pre>
  
  <p>Edit : Sorry, I should have post this earlier , so in "onCreate" , i use handler to call "mUpdate" . Is it the right way to call or not? </p>
  
  <pre><code>    protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      intent = getIntent();
      setContentView(R.layout.activity_display_message);
      message = intent.getStringArrayExtra(MainActivity.EXTRA_MESSAGE);
      newtext = (TextView)findViewById(R.id.TextView1);
      userName = message[0];
      serverIP = message[1];
      sendConnectionRequest ();
      mHandler = new Handler();   // Handler to update UI      
      mHandler.post(mUpdate);     // post is a method to update UI
  
      }
  </code></pre>