public class BaseFragment extends Fragment {/*布局*/private View view;/**/boolean isVisible = false;@Nullable@Overridepublic View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {view = setRootView(inflater,container);Log.i("包名："+getClass().getName(),"onCreateView");return view;}protected View setRootView(LayoutInflater inflater, @Nullable ViewGroup container){return null;}protected void initWidght(){};protected void initData(){};/*** 解决预加载* */@Overridepublic void setUserVisibleHint(boolean isVisibleToUser) {super.setUserVisibleHint(isVisibleToUser);Log.i("包名："+getClass().getName()," setUserVisibleHint  显示"+getUserVisibleHint());if (getUserVisibleHint()){onVisible();isVisible = true;}else {
//            onInvisible();
        }}/***  预加载--显示-加载数据* */private void onVisible() {if (!isVisible){initWidght();}}/*** 预加载--不显示时* */private void onInvisible() {isVisible = false;}protected <T extends View>T getView(int resourcesId){return (T) view.findViewById(resourcesId);}/*** Toast提示;* @param content 提示内容;*/protected void showToast(String content) {Toast.makeText(getActivity(), content, Toast.LENGTH_SHORT).show();}
}

public class IndexChatFragment extends BaseFragment {TextView mTextView;@Overrideprotected View setRootView(LayoutInflater inflater, @Nullable ViewGroup container) {return inflater.inflate(R.layout.fragment_index_chat,container,false);}@Overrideprotected void initWidght() {mTextView = getView(R.id.ceshi);mTextView.setText("赋值测试");}