https://blog.csdn.net/zhiyuan0932/article/details/52593039
方法介绍
addToBackStack(tag); 将Fragment添加到回退栈中，tag可以为空
popBackStack(); 清除回退栈中栈顶的Fragment
popBackStack(String tag, int i );
如果i=0,回退到该tag所对应的Fragment层
如果i=FragmentManager.POP_BACK_STACK_INCLUSIVE,回退到该tag所对应的Fragment的上一层
popBackStackImmediate 立即清除回退栈中栈顶Fragment
getBackStackEntryCount(); 获取回退栈中Fragment的个数
getBackStackEntryAt(int index) 获取回退栈中该索引值下的Fragment
Fragment2 f2 =newFragment2();
FragmentTransaction tx = getFragmentManager().beginTransaction();
tx.replace(R.id.fl, f2);//将当前的事务添加到了回退栈
tx.addToBackStack(null);
tx.commit();
static MyFragment newInstance(String s){
MyFragment myFragment = new MyFragment();
Bundle bundle = new Bundle();
bundle.putString("DATA",s);
myFragment.setArguments(bundle);
return myFragment;
}
//同样，在onCreatView中直接获取这个值
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.layout_fragment,container,false);
Bundle bundle = getArguments();
String data = bundle.getString("DATA");
tv = (TextView) view.findViewById(R.id.id_fm_tv);
if(data != null){
tv.setText(data);
}
return view;
}
