控件很簡單，上方tab是使用LinearLayout動態添加View，下方就是一個RecyclerView；
目前的數據就三級（省市區\縣），選擇完成或點擊確定就回調結果（Json字符串）；
點擊上方的tab可以回選；
....
很簡單，主要是代碼和思路吧；看一下代碼；
public class AddressSelectView extends RelativeLayout {
private LinearLayout tab;
private RecyclerView rv;
private Context mC;
private AddressBean addressBean;//數據源
private List<AddressBean.AddressItemBean> addressDatas; //當前正在選擇的數據
private List<AddressBean.AddressItemBean> alreadySelectDatas; //已經選擇的數據
public AddressSelectView(Context context) {
super(context);
init(context);
}
public AddressSelectView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public AddressSelectView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context);
}
private View rootView;
private void init(Context context) {
mC = context;
rootView = View.inflate(context, R.layout.activity_address_select, this);
tab = rootView.findViewById(R.id.tab);
rv = rootView.findViewById(R.id.rv);
initList();
initData();
initView();
}
private String clickText; //回退時點擊的文字
private void initList() {
rootView.findViewById(R.id.tvQ).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
if (onSelectConfirmListEner != null) onSelectConfirmListEner.onConfirm(new Gson().toJson(alreadySelectDatas));
}
});
setOnTabClickListEner(new OnTabClickListEner() {
@Override
public void onTabClick(View view, int position) {
if (alreadySelectDatas == null || position == tab.getChildCount() - 1) return;
if (alreadySelectDatas.size() > position)
clickText = alreadySelectDatas.get(position).getName();
if (position == 0) {
//如果點擊第一個，就重新開始選擇
if (alreadySelectDatas != null) alreadySelectDatas.clear();
tab.removeAllViews();
addRadioButton("選擇省");
if (addressBean != null) {
addressAdapter.setDatas(addressBean.getProvince());
}
} else {
//如果點擊的不是第一個，則刷新數據
List<AddressBean.AddressItemBean> alreadySelectDatas2 = new ArrayList<>();
if (alreadySelectDatas.size() >= position) {
for (int i = 0; i < position; i++) {
//只保留點擊的這個之前的數據；
alreadySelectDatas2.add(alreadySelectDatas.get(i));
}
}
alreadySelectDatas.clear();
alreadySelectDatas.addAll(alreadySelectDatas2);
//使用新的數據重新規劃數據源和UI
tab.removeAllViews();
for (int j = 0; j < alreadySelectDatas.size(); j++) {
addRadioButton(alreadySelectDatas.get(j).getName());
}
selectPostion(alreadySelectDatas.get(alreadySelectDatas.size() - 1), false);
}
}
});
}
private AddressAdapter addressAdapter;
private void initView() {
addRadioButton("選擇省");
rv.setLayoutManager(new LinearLayoutManager(mC));
addressAdapter = new AddressAdapter(mC, null);
rv.setAdapter(addressAdapter);
if (addressBean != null) {
addressAdapter.setDatas(addressBean.getProvince());
}
}
/**
* 初始化數據
* 拿assets下的json文件
*/
private void initData() {
StringBuilder jsonSB = new StringBuilder();
try {
BufferedReader addressJsonStream = new BufferedReader(new InputStreamReader(mC.getAssets().open("address.json")));
String line;
while ((line = addressJsonStream.readLine()) != null) {
jsonSB.append(line);
}
} catch (IOException e) {
e.printStackTrace();
}
// 將數據轉換爲對象
addressBean = new Gson().fromJson(jsonSB.toString(), AddressBean.class);
}
/**
* 添加一個Tab
*
* @param text
* @return
*/
private void addRadioButton(String text) {
for (int i = 0; i < tab.getChildCount(); i++) {
((TextView) tab.getChildAt(i)).setTextColor(getResources().getColor(R.color.textmain));
}
final TextView textView = new TextView(mC);
textView.setTag(tab.getChildCount());
textView.setText(text);
textView.setTextSize(16);
textView.setPadding(20, 0, 0, 0);
textView.setTextColor(getResources().getColor(R.color.textselect));
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (onTabClickListEner != null)
onTabClickListEner.onTabClick(textView, (int) textView.getTag());
}
});
tab.addView(textView);
}
/**
* 選擇一個位置後
*
* @param data
*/
private void selectPostion(AddressBean.AddressItemBean data, boolean isAddData) {
rv.scrollToPosition(0);
if (alreadySelectDatas == null) {
alreadySelectDatas = new ArrayList<>();
}
if (isAddData) alreadySelectDatas.add(data);
if (addressDatas == null) {
addressDatas = new ArrayList<>();
} else {
addressDatas.clear();
}
//修改當前選擇的名稱
((TextView) tab.getChildAt(tab.getChildCount() - 1)).setText(data.getName());
if (tab.getChildCount() == 1) {
addRadioButton("選擇市");
for (int i = 0; i < addressBean.getCity().size(); i++) {
if (TextUtils.equals(data.getId(), addressBean.getCity().get(i).getAboveId())) {
addressDatas.add(addressBean.getCity().get(i));
}
}
} else if (tab.getChildCount() == 2) {
addRadioButton("選擇區");
for (int i = 0; i < addressBean.getDistrict().size(); i++) {
if (TextUtils.equals(data.getId(), addressBean.getDistrict().get(i).getAboveId())) {
addressDatas.add(addressBean.getDistrict().get(i));
}
}
}else {
if (onSelectConfirmListEner != null) onSelectConfirmListEner.onConfirm(new Gson().toJson(alreadySelectDatas));
}
addressAdapter.setDatas(addressDatas);
}
private class AddressAdapter extends RecyclerView.Adapter<AddressAdapter.Vh> {
private Context context;
private List<AddressBean.AddressItemBean> datas;
public AddressAdapter(Context context, List<AddressBean.AddressItemBean> datas) {
this.context = context;
if (datas == null) {
this.datas = new ArrayList<>();
} else {
this.datas = datas;
}
}
public void setDatas(List<AddressBean.AddressItemBean> datas) {
if (datas == null) {
this.datas = new ArrayList<>();
} else {
this.datas = datas;
}
notifyDataSetChanged();
}
@NonNull
@Override
public Vh onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
return new Vh(LayoutInflater.from(context).inflate(R.layout.item_address, parent, false));
}
@Override
public void onBindViewHolder(@NonNull Vh holder, final int position) {
holder.tv.setText(datas.get(position).getName());
holder.tv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
selectPostion(datas.get(position), true);
}
});
//如果用戶點擊導航條重新選擇的話，就標記當前選擇過的顏色加深
if (TextUtils.equals(datas.get(position).getName(), clickText)) {
holder.tv.setTextColor(context.getResources().getColor(R.color.textselect));
} else {
holder.tv.setTextColor(context.getResources().getColor(R.color.textmain));
}
}
@Override
public int getItemCount() {
return datas.size();
}
class Vh extends RecyclerView.ViewHolder {
public TextView tv;
public Vh(@NonNull View itemView) {
super(itemView);
tv = itemView.findViewById(R.id.tv);
}
}
}
interface OnTabClickListEner {
void onTabClick(View view, int position);
}
private OnTabClickListEner onTabClickListEner;
private void setOnTabClickListEner(OnTabClickListEner onTabClickListEner) {
this.onTabClickListEner = onTabClickListEner;
}
public interface OnSelectConfirmListEner {
void onConfirm(String s);
}
public OnSelectConfirmListEner onSelectConfirmListEner;
public void setOnSelectConfirmListEner(OnSelectConfirmListEner onSelectConfirmListEner) {
this.onSelectConfirmListEner = onSelectConfirmListEner;
}
}
項目在這裏：https://github.com/CuiChenbo/AddressSelectView
若是想實現類似的效果，推薦把源代碼copy下來，按照自己的UI風格和數據源格式改一下就OK啦；
當然什麼代碼都不動也可以，就是上面的效果；
把控件放在一個PopupWindow或Dialog中彈出來，選擇完成後在隱藏掉；