Fragment的压栈和弹出

跳转至某一个fragment的时候：

holder是你的Activity继承了FragmentActivity

public void goFragment (Fragment targetFragment, Bundle bundle) {
  FragmentTransaction transaction = holder.fragmentManager.beginTransaction();
  if (bundle != null) {
       targetFragment.setArguments(bundle);
     }
transaction.replace(R.id.re_content, targetFragment, targetFragment.getClass().getName());
		transaction.addToBackStack(targetFragment.getClass().getName());
		transaction.commit();
	}

返回到上一页时：

public void backFragment (Fragment sourceFragment) {
    if (sourceFragment != null) {
			holder.fragmentManager.beginTransaction().hide(sourceFragment);
		}
		holder.fragmentManager.popBackStack();
	}

跳转至下一页且不能back的时候

	public void goFragmentNoBackStack (Fragment targetFragment, Bundle bundle) {
		holder.fragmentManager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
		FragmentTransaction transaction = holder.fragmentManager.beginTransaction();
		if (bundle != null) {
			targetFragment.setArguments(bundle);
		}
		transaction.replace(R.id.re_content, targetFragment);
		transaction.commit();
	}

上面的方法不适合于支付宝的支付， 尤其是在获取了支付宝的响应以后：
针对支付宝的情况，建议使用一个新的Activity去处理，通过startActivityForResult，这样就不会有异常抛出