activity继承自FragmentActivity
Fragment1继承自Fragment
在activity中: gettFragmentManager ,并且fragment都是android.app中的
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction(); fragmentTransaction.add(R.id.fragment_layout, new Fragment1(), "frg1"); fragmentTransaction.commit();
此时fragment中的 onAttach方法是不会调用的,其他方法正常调用
换成android.support.v4.app包的getSupportFragmentManager
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction(); fragmentTransaction.add(R.id.fragment_layout, new Fragment1(), "frg1"); fragmentTransaction.commit();
此时 onAttach才会调用 ,其他方法也正常
在栈溢出网上也搜到了:http://stackoverflow.com/questions/32077086/android-onattachcontext-not-called-for-api-23