解析省市區Json

一、解析省市區Json文件
此處只解析了本地json文件，spinner組件並沒有實現省市區三級聯動功能，後續再補充，歡迎討論。
要解析的json文件百度網盤連接 網盤連接

1、XML文件如下，只有三個spinner組件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    >

    <Spinner
        android:id="@+id/spi_province"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"/>

    <Spinner
        android:id="@+id/spi_city"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"/>

    <Spinner
        android:id="@+id/spi_area"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"/>

</LinearLayout>

2、Java文件如下，initData( ) 函數負責解析json文件，此處直接簡單粗暴的用解析的數據初始化了三個 list ,並未做到省市區的三級聯動功能。 spinner組件默認顯示列表首位的值。

public class MainActivity extends AppCompatActivity {
    private static final String TAG = "MainActivity";
    private Spinner spiProvince,spiCity,spiArea;
    private ArrayAdapter<String> adaProvince,adaCity,adaArea;
    private List<String> proList,cityList,areaList;
    private int position;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        spiProvince = findViewById(R.id.spi_province);
        spiCity = findViewById(R.id.spi_city);
        spiArea = findViewById(R.id.spi_area);

        proList = new ArrayList<String>();
        cityList = new ArrayList<String>();
        areaList = new ArrayList<String>();

        initData();
        adaProvince = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,proList);
        adaCity = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,cityList);
        adaArea = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,areaList);

        adaProvince.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        adaCity.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        adaArea.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        spiProvince.setAdapter(adaProvince);
        spiCity.setAdapter(adaCity);
        spiArea.setAdapter(adaArea);

        spiProvince.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                position = i;
            }

            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {
            }
        });
    }

    public List<String> initData(){
        try {
            InputStream inputStream = getResources().getAssets().open("province.txt");
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
            StringBuffer stringBuffer = new StringBuffer();
            String line;
            while ((line = bufferedReader.readLine()) != null){
                stringBuffer.append(line);
            }

            JSONArray jsonArray = new JSONArray(stringBuffer.toString());
            for(int i =0; i<jsonArray.length();i++) {
                JSONObject jsonObject = jsonArray.getJSONObject(i);
                String proName = jsonObject.getString("name");
                //獲取省列表
                Log.e(TAG,"proName = " + proName);
                proList.add(proName);

                    JSONArray cityArray = jsonObject.getJSONArray("city");
                    for (int j=0; j<cityArray.length(); j++){
                        JSONObject cityObject = cityArray.getJSONObject(j);
                        String cityName = cityObject.getString("name");
                        //獲取市列表
                        Log.e(TAG,"cityName = " + cityName);
                        cityList.add(cityName);

                            JSONArray areaArray = cityObject.getJSONArray("area");
                            for (int k=0 ; k<areaArray.length(); k++){
                                String areaName = areaArray.getString(k);
                                //獲取區域列表
                                Log.e(TAG,"areaName = " + areaName);
                                areaList.add(areaName);
                            }
                    }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return proList;
    }
}