@Override
  public boolean dispatchTouchEvent(MotionEvent ev) {
    //Finger touch screen event
    if (ev.getAction() == MotionEvent.ACTION_DOWN) {
      // get current focus,Generally it is EditText
      View view = getCurrentFocus();
      if (isShouldHideSoftKeyBoard(view, ev)) {
        hideSoftKeyBoard(view.getWindowToken());
      }
    }
    return super.dispatchTouchEvent(ev);
  }

/**
   * Judge what situation hide the soft keyboard,click EditText view should show soft keyboard
   * @param v Incident event
   * @param event 
   * @return
   */
  private boolean isShouldHideSoftKeyBoard(View view, MotionEvent event) {
    if (view != null && (view instanceof EditText)) {
      int[] l = { 0, 0 };
      view.getLocationInWindow(l);
      int left = l[0], top = l[1], bottom = top +view.getHeight(), right = left
          + view.getWidth();
      if (event.getX() > left && event.getX() < right
          && event.getY() > top && event.getY() < bottom) {
        // If click the EditText event ,ignore it
        return false;
      } else {
        return true;
      }
    }
    // if the focus is EditText,ignore it; 
    return false;
  }

/**
   * hide soft keyboard
   * @param token
   */
  private void hideSoftKeyBoard(IBinder token) {
    if (token != null) {
      InputMethodManager im = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
      im.hideSoftInputFromWindow(token,
  InputMethodManager.HIDE_NOT_ALWAYS);
    }
  }