ViewTreeObserver observer = tv.getViewTreeObserver(); // textAbstract为TextView控件              observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {                    @Override                  public void onGlobalLayout() {                      ViewTreeObserver obs = tv.getViewTreeObserver();                      obs.removeGlobalOnLayoutListener(this);                      if (tv.getLineCount() >= 2) {                          System.out.println("行数" + tv.getLineCount());                      }                  }              });