Android 仿淘宝2018添加地址

先来看看淘宝2018的添加收货地址的效果

分析实现的原理： bottomDialog=tabLayout+RecyclerView

其中的2个特点：

1、tablayout的动态添加的，并且选中item之后会自动跳入下一个tab
2、RecyclerView选中之后，下次选中对应的tab会定位的RecyclerView指定的位置。（比如：选中广州市tab，下面的RecyclerView定位到广州市）

这里的地址数据来自：2018最新area.json（智行火车票）

项目实现的效果：

其中BottomDialog.class：

/*** Description :** @author WSoBan* @date 2018/05/03*/
public class BottomDialog extends Dialog {private OnSelectedResultCallBack resultCallBack;private LayoutBottomSheetDialogBinding mDialogBinding;private AreaAdapter mAdapter;private Map currentMap = new TreeMap<>();public BottomDialog(Context context) {super(context, R.style.bottom_dialog);init(context);}private void init(Context context) {mDialogBinding = DataBindingUtil.inflate(LayoutInflater.from(getContext()),R.layout.layout_bottom_sheet_dialog, null, false);setContentView(mDialogBinding.getRoot());initView();Window window = getWindow();WindowManager.LayoutParams params = window.getAttributes();params.width = WindowManager.LayoutParams.MATCH_PARENT;
//        params.height = DensityUtils.dp2px(context, 400);window.setAttributes(params);window.setGravity(Gravity.BOTTOM);}private void initView() {mDialogBinding.ivClose.setOnClickListener(v -> dismiss());mAdapter = new AreaAdapter(R.layout.item_area);mAdapter.setOnSelectedListener((map, pos) -> {if (pos >= 2) {if (resultCallBack != null) {resultCallBack.onResult(currentMap.get(pos).getNames());}dismiss();} else {currentMap = map;mDialogBinding.tlTitle.removeAllTabs();for (Integer in : map.keySet()) {mDialogBinding.tlTitle.addTab(mDialogBinding.tlTitle.newTab().setText(map.get(in).getName()));}addChooseTab();}});LinearLayoutManager manager = new LinearLayoutManager(getContext());mDialogBinding.rv.setLayoutManager(manager);mDialogBinding.rv.addItemDecoration(new LineAreaItemDecoration(getContext(), 2));mDialogBinding.rv.setAdapter(mAdapter);mDialogBinding.tlTitle.setTabMode(TabLayout.MODE_SCROLLABLE);mDialogBinding.tlTitle.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {@Overridepublic void onTabSelected(TabLayout.Tab tab) {int pos = tab.getPosition();if (pos == 0) {mAdapter.setData(pos, AreaParser.getInstance().getProvinceList());} else {mAdapter.setData(pos, AreaParser.getInstance().getChildList(currentMap.get(pos - 1).getTid()));}//移动到指定位置mAdapter.moveToPosition(manager);}@Overridepublic void onTabUnselected(TabLayout.Tab tab) {}@Overridepublic void onTabReselected(TabLayout.Tab tab) {}});addChooseTab();}private void addChooseTab() {mDialogBinding.tlTitle.addTab(mDialogBinding.tlTitle.newTab().setText("请选择"), true);TabLayoutUtil.reflex(mDialogBinding.tlTitle);}public BottomDialog(Context context, int themeResId) {super(context, themeResId);init(context);}public BottomDialog(Context context, boolean cancelable, OnCancelListener cancelListener) {super(context, cancelable, cancelListener);init(context);}public void setResultCallBack(OnSelectedResultCallBack resultCallBack) {this.resultCallBack = resultCallBack;}public interface OnSelectedResultCallBack {void onResult(String result);}
}

代码太多久不一一写出来了，这里附上源码，了解下

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