This effect is actually to refresh the list data. Select the corresponding province to obtain the city data below it and refresh the list, select the corresponding city to obtain the district and county data below it and refresh the list, and return the selected data to the previous page; when the return or physical return key is triggered, do the same processing.

Implementation main code:

public class DataActivity extends AppCompatActivity implements View.OnClickListener {
    private TextView tvBack;
    private ListView listview;
    private ChoseDataAdapter choseDataAdapter;
    private List<PlaceInfo> pList = new ArrayList<>();
    private int cityIndex = 0;
    private String prvStr, cityStr, townCity;//Province name city name district name
    private String prvId, cityId, townId;//Province id City id District id

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_data);
        initView();
    }

    private void initView() {
        tvBack = (TextView) findViewById(R.id.tv_back);
        tvBack.setOnClickListener(this);

        ParseData.jsonToData(this);
        //Province data
        pList = PrioviceInfo.getProvice();

        listview = (ListView) findViewById(R.id.listview);
        listview.setDivider(null);
        choseDataAdapter = new ChoseDataAdapter(DataActivity.this, pList);
        listview.setAdapter(choseDataAdapter);

        listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                cityIndex++;
                if (cityIndex == 1) {
                    PlaceInfo placeInfo = pList.get(position);
                    //Get the name and id of the selected province
                    prvStr = stringTOString(placeInfo.dict_name);
                    prvId = stringTOString(placeInfo.dict_id);
                    //Get the city / county corresponding to the selected province
                    pList = PrioviceInfo.getCity(prvId);
                    if (pList.size() == 0) {
                        placeInfo.valueName = prvStr;
                        placeInfo.id_1 = prvId;
                        getDataBack(placeInfo);
                    } else {
                        //Refresh city data and display
                        choseDataAdapter.nodfiyData(pList);
                    }
                } else if (cityIndex == 2) {
                    PlaceInfo cityInfo = pList.get(position);
                    //Get the selected city name and id
                    cityStr = stringTOString(cityInfo.dict_name);
                    cityId = stringTOString(cityInfo.dict_id);
                    //Get the district / county data corresponding to the selected city
                    pList = PrioviceInfo.getTown(cityId);
                    if (pList.size() == 0) {
                        cityInfo.valueName = prvStr + " " + cityStr;
                        cityInfo.id_1 = prvId;
                        cityInfo.id_2 = cityId;
                        getDataBack(cityInfo);
                    } else {
                        //Refresh display district and county data
                        choseDataAdapter.nodfiyData(pList);
                    }
                } else if (cityIndex == 3) {
                    PlaceInfo townInfo = pList.get(position);
                    townCity = stringTOString(townInfo.dict_name);
                    townId = stringTOString(townInfo.dict_id);
                    townInfo.valueName = prvStr + " " + cityStr + " " + townCity;
                    townInfo.id_1 = prvId;
                    townInfo.id_2 = cityId;
                    townInfo.id_3 = townId;
                    getDataBack(townInfo);
                }
            }
        });
    }

    /**
     * Go back to the previous page and return good data
     *
     * @param info
     */
    private void getDataBack(PlaceInfo info) {
        Intent intent = new Intent();
        Bundle bundle = new Bundle();
        bundle.putSerializable("datainfo", info);
        intent.putExtras(bundle);
        setResult(RESULT_OK, intent);
        finish();

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.tv_back:
                toBack();
                break;
        }
    }

    class ChoseDataAdapter extends DefaultAdapter<PlaceInfo> {
        public ChoseDataAdapter(Context context, List<PlaceInfo> list) {
            super(context, list);
        }

        @Override
        protected BaseHolder<PlaceInfo> getHolder() {
            return new ChoseDataHolder();
        }

        @Override
        public void refreshUi(View convertView, int position) {

        }
    }

    class ChoseDataHolder extends BaseHolder<PlaceInfo> {
        TextView valueText;

        @Override
        public void refreshView(List<PlaceInfo> list, int pos) {
            PlaceInfo sysBasicData = list.get(pos);
            this.valueText.setText("" + sysBasicData.dict_name);
        }

        @Override
        public View initView() {
            View convertView = View.inflate(DataActivity.this, R.layout.chose_data_view, null);
            this.valueText = findID(convertView, R.id.valueText);
            return convertView;
        }

    }
    private String stringTOString(String value) {
        return value == null ? "" : value;
    }

    /**
     * Return method
     */
    private void toBack() {
        cityIndex--;
        if (cityIndex == 1) {
            //Display the upper level city
            pList = PrioviceInfo.getCity(prvId);
            choseDataAdapter.nodfiyData(pList);
        } else if (cityIndex== 0) {
            pList=PrioviceInfo.getProvice();
            choseDataAdapter.nodfiyData(pList);
        } else if (cityIndex == -1) {
            finish();
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            toBack();
        }
        return true;
    }
}

That's fine.

Source address:
https://pan.baidu.com/s/1boYvCAV