/**
  * 跳转到SimpleBackActivity时,只能使用该方法跳转
  *
  * @param cxt 从哪个Activity跳转
  * @param code 启动码
  * @param page 要显示的Fragment
  * @param data 传递的Bundle数据
  */
 public static void postShowForResult(
     Fragment fragment, int code, SimpleBackPage page, Bundle data) {
   Intent intent = new Intent(fragment.getActivity(), SimpleBackActivity.class);
   intent.putExtra(CONTENT_KEY, page.getValue());
   intent.putExtra(DATA_KEY, data);
   fragment.startActivityForResult(intent, code);
 }
 @Override
 public void setRootView() {
   setContentView(R.layout.aty_simple_back);
   int value = getIntent().getIntExtra(CONTENT_KEY, -1);
   if (value != -1) {
     try {
       currentFragment = (TitleBarFragment) SimpleBackPage.getPageByValue(value).newInstance();
       changeFragment(currentFragment);
     } catch (InstantiationException e) {
     } catch (IllegalAccessException e) {
     }
   }
 }
 /**
  * 跳转到SimpleBackActivity时,只能使用该方法跳转
  *
  * @param cxt
  * @param page
  * @param data
  */
 public static void postShowWith(Context cxt, SimpleBackPage page, Bundle data) {
   Intent intent = new Intent(cxt, SimpleBackActivity.class);
   intent.putExtra(CONTENT_KEY, page.getValue());
   intent.putExtra(DATA_KEY, data);
   cxt.startActivity(intent);
 }