笔记

Fragment仿微信的一些代码

MainActivity
fg = getFragmentManager();
transaction = fg.beginTransaction();
transaction.replace(R.id.root,new F1(),”1”);
transaction.commit();
public void onClick(View v) {
FragmentTransaction transaction1 = fg.beginTransaction();
switch (v.getId()){
case R.id.bt:
transaction1.replace(R.id.root,new F1(),”1”);
break;
case R.id.bt1:
transaction1.replace(R.id.root,new F2(),”2”);
break;
}
transaction1.commit();
}

BaseFragment
public abstract class BaseFragment extends Fragment {
public Activity mActivity;
@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);    // fragment有一个公共的桥梁activity    // getActivity()获取到当前fragment所依附的Activity实例    mActivity = getActivity();}//onCreateView是创建该fragment对应的视图,@Nullable@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {    View view=initView();    return view;}//activity创建完成的时候 调用initData()@Overridepublic void onActivityCreated(Bundle savedInstanceState) {    super.onActivityCreated(savedInstanceState);    initData();}/** * 初始化数据的方法 * 非抽象：让子类选择性的重选 */public void initData() {}/** * 初始化view的方法 * 抽象：强制子类必须重写 * @return */public abstract View initView();

}
F1
public class F1 extends BaseFragment {
@Override
public View initView() {
View view = View.inflate(mActivity, R.layout.flay, null);
return view;
}
}
MainActivity布局