管理Fragment FragmentManager fragmentManager=getFragmentManager(); FragmentTransaction fragmentTransaction=fragmentManager.beginTransaction(); FragmentTransaction被称作Fragment事务，与数据库事务类似，Fragment事 注意 务代表了Activity对Fragment执行的多个改变操作。 使用FragmentTransaction /创建一个新的Fragment对象 Fragment newFragment=new ExampleFragment () //通过FragmentManager获取Fragment事务对象 FragmentTransaction transaction=getFragmentManager().beginTransaction(); /通过replace(O方法把fragment_container替换成新的Fragment对象 transaction.replace(R.id.fragment_container,newFragment); //添加到回退栈 transaction.addToBackStack(null); //提交事务 transaction.commit () FragmentManager fragmentManager=getFragmentManager(); FragmentTransaction fragmentTransaction=fragmentManager.beginTransaction(); FragmentTransaction Fragment Fragment Activity Fragment • 使用FragmentTransaction //创建一个新的Fragment对象 Fragment newFragment=new ExampleFragment(); //通过FragmentManager获取Fragment事务对象 FragmentTransaction transaction=getFragmentManager().beginTransaction(); //通过replace()方法把fragment_container替换成新的Fragment对象 transaction.replace(R.id.fragment_container,newFragment); //添加到回退栈 transaction.addToBackStack(null); //提交事务 transaction.commit();