直接上效果

所需依赖

implementation 'liji.library.dev:citypickerview:0.1.0'

代码块

CityPickerView cityPickerView = new CityPickerView(MainActivity.this);
                cityPickerView.setOnCityItemClickListener(new CityPickerView.OnCityItemClickListener() {
                    @Override
                    public void onSelected(String... citySelected) {
                        //省份
                        String province = citySelected[0];
                        //城市
                        String city = citySelected[1];
                        //区县
                        String district = citySelected[2];
                        //邮编
                        String code = citySelected[3];
                        Toast.makeText(MainActivity.this, province + "-" + city + "-" + district, Toast.LENGTH_LONG).show();
                    }
                });
                cityPickerView.show();

这就OK啦.