public?void?onClick(View?arg0)?{
				Intent?intent=new?Intent(Shopping_cart.this,MainActivity.class);
				startActivity(intent);
				number=edittext.getText()+"";
				Bundle?bundle=new?Bundle();
				bundle.putString("name",?name);
				bundle.putString("monney",?monney);
				bundle.putString("number",?number);
				SecondFragment?secondfragment=new?SecondFragment();
				secondfragment.setArguments(bundle);
				android.app.FragmentManager?fragmentManager=getFragmentManager();
				android.app.FragmentTransaction?beginTransaction=fragmentManager.beginTransaction();
				beginTransaction.add(R.id.relativelayout,secondfragment,"secondfragment");
				beginTransaction.commit();

網(wǎng)上說(shuō)需要導(dǎo)入V4的包，可是我確實(shí)導(dǎo)入V4包了

The method add(int, Fragment, String) in the type FragmentTransaction is not applicable for the arguments (int, SecondFragment, String)

這個(gè)是add的錯(cuò)誤信息，整不明白了，求解