android - 我应该怎么做才能将数据从 json 插入到 Android 中的 sqlite

Question

我在 android 中创建 sqlit 数据库以将来自 json 的数据存储在数据库中，以便在应用程序离线时查看数据我添加代码来创建数据库和列，但我不知道如何将数据从 json 插入到我的数据库中。我应该怎么做才能将数据从 json 插入到 sqlite我应该在代码中添加什么来做到这一点？

SQLiteOpenHelper

import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class BookingTabel extends SQLiteOpenHelper {


    private static final int DB_VERSION = 1;

    private static final String DB_NAME = "myDB";

    // Books table name
   private static final String TABLE_BOOKINDS = "bookings";

   // Books Table Columns names
   private static final String KEY_ID = "id";
   private static final String KEY_BOOKING_NUM = "booking_num";
   private static final String KEY_TITLE = "title";
   private static final String KEY_BOOKING_START= "booking_start";
   private static final String KEY_BOOKING_END = "booking_end";
   private static final String KEY_PROPERTY = "property_type";
   private static final String KEY_CUSTOMER_ID = "customer_id";
   private static final String KEY_DESCRIPTION = "description";
   private static final String KEY_ACCEPT_STATUS = "accept_status";
   private static final String KEY_BOOLING_ADDRESS = "booking_address";
   private static final String KEY_PO_BOX = "po_box";
   private static final String KEY_CREATED = "created";
   private static final String KEY_POSTCODE = "postcode";
   private static final String KEY_STATE = "state";
   private static final String KEY_STREET_ADDRESS = "street_address";
   private static final String KEY_STREET_NUMBER = "street_number";
   private static final String KEY_SUBURB = "suburb";
   private static final String KEY_UNIT_LOT_NUMBER = "unit_lot_number";
   private static final String KEY_STATUS = "status";
   private static final String KEY_CONVERT_STATUS = "convert_status";
   private static final String KEY_QOUTE = "qoute";
   private static final String KEY_SUB_TOTAL = "sub_total";
   private static final String KEY_TOTAL_DISCOUNT = "total_discount";
   private static final String KEY_BOOKING_DISTANCE = "booking_distance";
   private static final String KEY_GST = "gst";
   private static final String KEY_ORIGINAL_BOOKING_ID = "original_booking_id";

   public BookingTabel(Context context) {
        super(context, DB_NAME, null,DB_VERSION);
        // TODO Auto-generated constructor stub
    }

private static final String[] COLUMNS = {KEY_ID,KEY_BOOKING_NUM,KEY_TITLE,KEY_BOOKING_START,KEY_BOOKING_END,KEY_PROPERTY,
       KEY_CUSTOMER_ID,KEY_DESCRIPTION,KEY_ACCEPT_STATUS,KEY_BOOLING_ADDRESS,KEY_PO_BOX,KEY_CREATED ,
       KEY_POSTCODE,KEY_STATE,KEY_STREET_ADDRESS,KEY_STREET_NUMBER,KEY_SUBURB,KEY_UNIT_LOT_NUMBER,KEY_STATUS,
       KEY_CONVERT_STATUS,KEY_QOUTE,KEY_SUB_TOTAL,KEY_TOTAL_DISCOUNT,KEY_BOOKING_DISTANCE,KEY_GST,
       KEY_ORIGINAL_BOOKING_ID,};

   @Override
    public void onCreate(SQLiteDatabase db) {
           // TODO Auto-generated method stub

           // SQL statement to create book table
     String CREATE_BOOKINDS_TABLE =
     "CREATE TABLE booking ( " + "id INTEGER PRIMARY KEY"+ "booking_num VARCHAR(250)"+ "title VARCHAR(250)"+
     "booking_start DATETIME "+"booking_end DATETIME "+
     "property_type VARCHAR(250) NOT NULL DEFAULT 'House'"+
     "customer_id INTEGER+description TEXT"+"accept_status VARCHAR(250)"+"booking_address VARCHAR(250)" +
     "po_box VARCHAR(250)"+ "created INTEGER"+ "postcode INTEGER"+"state VARCHAR(250)"+
     "street_address VARCHAR(250)"+"street_number INTEGER"+"suburb VARCHAR(250)"+"unit_lot_number INTEGER"+
     "status VARCHAR(250)"+"convert_status VARCHAR(250)"+"qoute FLOAT"+"sub_total FLOAT"+"total_discount FLOAT"+
     "booking_distance FLOAT"+"gst FLOAT"+"original_booking_id INTEGER )";


     // create books table
     db.execSQL(CREATE_BOOKINDS_TABLE);

    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int arg1, int arg2) {
           // TODO Auto-generated method stub
           db.execSQL("DROP TABLE IF EXISTS bookings");

     // create fresh books table
     this.onCreate(db);
     }

    public void addBookings(Bookings booking){
        Log.d("addBooking", booking.toString());

        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_BOOKING_NUM,booking.getbookingnum());
        values.put(KEY_TITLE,booking.gettitle());
        values.put(KEY_BOOKING_START ,booking.getbookingstart() );
        values.put(KEY_BOOKING_END ,booking.getbooking_end() );
        values.put(KEY_PROPERTY ,booking.getpropertytype() );
        values.put(KEY_CUSTOMER_ID ,booking.getcustomer_id() );
        values.put( KEY_DESCRIPTION,booking.getdescription() );
        values.put( KEY_ACCEPT_STATUS,booking.getaccept_status() );
        values.put( KEY_BOOLING_ADDRESS,booking.getbookingaddress() );
        values.put( KEY_PO_BOX,booking.getpo_box() );
        values.put( KEY_CREATED,booking.getcreated() );
        values.put( KEY_POSTCODE,booking.getpostcode() );
        values.put( KEY_STATE,booking.getstate() );
        values.put( KEY_STREET_ADDRESS,booking.getstreet_address() );
        values.put( KEY_STREET_NUMBER,booking.getstreet_number() );
        values.put( KEY_SUBURB,booking.getsuburb() );
        values.put( KEY_UNIT_LOT_NUMBER,booking.getunit_lot_number() );
        values.put( KEY_STATUS,booking.getstatus() );
        values.put( KEY_CONVERT_STATUS,booking.getconvert_status() );
        values.put( KEY_QOUTE,booking.getqoute() );
        values.put( KEY_SUB_TOTAL,booking.getsub_total() );
        values.put( KEY_TOTAL_DISCOUNT,booking.gettotal_discount() );
        values.put( KEY_BOOKING_DISTANCE,booking.getbooking_distance() );
        values.put( KEY_GST,booking.getgst() );
        values.put( KEY_ORIGINAL_BOOKING_ID,booking.getoriginal_booking_id() );

        db.insert(TABLE_BOOKINDS, null, values);
        db.close();
    }


}

预订

public class Bookings {

    private int id;
    private String booking_num;
    private String title;
    private String booking_start;
    private String booking_end;
    private String property_type;
    private int customer_id;
    private String description;
    private String accept_status;
    private String booking_address;
    private String po_box;
    private int created;
    private int postcode;
    private String state;
    private String street_address;
    private int street_number;
    private String suburb;
    private int unit_lot_number;    
    private String status;
    private String convert_status;
    private Float qoute;
    private Float sub_total;
    private Float total_discount;
    private Float booking_distance;
    private Float gst;
    private int original_booking_id;

    public Bookings(){}

    public Bookings(String booking_num ,String title ,String booking_start ,String booking_end ,
            String property_type ,int customer_id ,String description ,String accept_status ,String booking_address ,
            String po_box ,int created ,int postcode ,String state ,String street_address ,int street_number ,
            String suburb ,int unit_lot_number ,String status ,String convert_status ,Float qoute ,Float sub_total ,
            Float total_discount ,Float booking_distance ,Float gst ,int original_booking_id){
            this.booking_num = booking_num;
            this.title = title;
            this.booking_start = booking_start;
            this.booking_end =booking_end ;
            this.property_type =property_type;
            this.customer_id = customer_id;
            this.description = description;
            this.accept_status = accept_status;
            this.booking_address = booking_address;
            this.po_box = po_box;
            this.created = created;
            this.postcode = postcode;
            this.state = state;
            this.street_address = street_address;
            this.street_number = street_number;
            this.suburb = suburb;
            this.unit_lot_number = unit_lot_number;
            this.status = status;
            this.convert_status = convert_status;
            this.qoute = qoute;
            this.sub_total = sub_total;
            this.total_discount = total_discount;
            this.booking_distance = booking_distance;
            this.gst = gst;
            this.original_booking_id = original_booking_id;
    }


    // ---- setter
    public void setId(int id){
           this.id = id;
    }

    public void setbookingnum(String booking_num){
           this.booking_num = booking_num;
    }

    public void settitle(String title){
        this.title = title;
    }
    public void setbookingstart(String booking_start){
        this.booking_start = booking_start;
    }
    public void setbookingend(String booking_end ){
        this.booking_end  = booking_end ;
    }
    public void setpropertytype(String property_type){
        this.property_type  = property_type;
    }
    public void setcustomerid(int customer_id){
        this.customer_id = customer_id;
    }
    public void setdescription(String description){
        this.description = description;
    }
    public void setacceptstatus(String accept_status){
        this.accept_status = accept_status;
    }
    public void setbookingaddress(String booking_address){
        this.booking_address = booking_address;
    }
    public void setpobox(String po_box ){
        this.po_box = po_box ;
    }
    public void setcreated(int created){
        this.created = created ;
    }
    public void setpostcode(int postcode){
        this.postcode = postcode;
    }
    public void setstate(String state){
        this.state =state ;
    }
    public void setstreetaddress(String street_address){
        this.street_address = street_address ;
    }
    public void setstreetnumber(int street_number){
        this.street_number = street_number;
    }
    public void setsuburb(String suburb){
        this.suburb = suburb;
    }
    public void setunit_lot_number(int unit_lot_number ){
        this.unit_lot_number = unit_lot_number;
    }
    public void setstatus(String status){
        this.status =status ;
    }
    public void setconvert_status(String convert_status){
        this.convert_status =convert_status ;
    }
    public void setqoute(Float qoute){
        this.qoute = qoute;
    }
    public void setsubtotal(Float sub_total ){
        this.sub_total  =sub_total  ;
    }
    public void settotal_discount(Float total_discount){
        this.total_discount =total_discount ;
    }
    public void setbookingdistance(Float booking_distance){
        this.booking_distance =booking_distance ;
    }
    public void setgst(Float gst){
        this.gst = gst;
    }
    public void setoriginal_booking_id(int original_booking_id){
        this.original_booking_id = original_booking_id ;
    }


    // --- getter ---


    public int getId(){
           return id;
    }
    public String getbookingnum(){
           return booking_num;
    }
    public String gettitle(){
           return title ;
    }
    public String getbookingstart(){
           return booking_start ;
    }
    public String getbooking_end(){
           return  booking_end;
    }
    public String getpropertytype(){
           return  property_type;
    }
    public int getcustomer_id(){
           return customer_id ;
    }
    public String getdescription(){
           return  description;
    }
    public String getaccept_status(){
           return  accept_status;
    }
    public String getbookingaddress(){
           return booking_address ;
    }
    public String getpo_box(){
           return  po_box;
    }
    public int getcreated(){
           return  created;
    }
    public int getpostcode(){
           return postcode ;
    }
    public String getstate(){
           return state ;
    }
    public String getstreet_address(){
           return street_address ;
    }
    public int getstreet_number(){
           return street_number ;
    }
    public String getsuburb(){
           return suburb ;
    }
    public int getunit_lot_number(){
           return unit_lot_number ;
    }
    public String getstatus(){
           return  status;
    }
    public String getconvert_status(){
           return  convert_status;
    }
    public Float getqoute(){
           return qoute ;
    }
    public Float getsub_total(){
           return  sub_total;
    }
    public Float gettotal_discount(){
           return  total_discount;
    }
    public Float getbooking_distance(){
           return  booking_distance;
    }
    public Float getgst(){
           return  gst;
    }
    public int getoriginal_booking_id(){
           return original_booking_id ;
    }


    public String toString(){
        return "Booking  >> id:"+id+" | booking_num:"+booking_num+" | title:"+title+
                " | booking_start"+booking_start+" | booking_end"+booking_end+" | property_type"+property_type+
                " | customer_id "+customer_id +" |description "+description+" | accept_status"+accept_status+
                " | booking_address"+booking_address+" | po_box"+po_box+" | created"+created+" | postcode"+postcode+
                " | state"+state+" | street_address"+street_address+" | street_number"+street_number+
                " | suburb"+suburb+" | unit_lot_number"+unit_lot_number+" | status"+status+
                " | convert_status"+convert_status+" | qoute"+qoute+" | sub_total"+sub_total+
                " | total_discount"+total_discount+" | booking_distance"+booking_distance+" | gst"+gst+
                " | original_booking_id"+original_booking_id;
                        }


}

allbookingfrag

import java.util.ArrayList;
import java.util.HashMap;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONObject;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class allbookingfrag extends Fragment {

    public static final String PREFS_NAME = "MyApp_Settings";
    private static final String givenUsername = "email";
    private static final String givenPassword = "password";

    private static final String TAG_RESULT = "result";
    private static final String TAG_BOOKING_NUM = "booking_num";
    private static final String TAG_TITLE = "title";
    private static final String TAG_STATUS = "status";
    private static final String TAG_BOOKING_START = "booking_start";
    private static final String TAG_BOOKING_END = "booking_end";
    private static final String TAG_QOUTE = "qoute";
    private static final String TAG_BOOKING_ADDRESS = "booking_address";
    private static final String TAG_CUSTOMER = "customer";
    private static final String TAG_CUSTOMER_NAME = "name";
    String result = null;
    ArrayList<HashMap<String, String>> resultList;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.allbookingfrag, container, false);

            SharedPreferences settings = getActivity().getSharedPreferences(PREFS_NAME, 0);
            String email = settings.getString("email",givenUsername);
            String password = settings.getString("password",givenPassword);
            System.out.println("In allbooking activity names is : " + email + "password is : " + password );

            connectWithHttpGet(email, password );

            resultList = new ArrayList<HashMap<String, String>>();

           ListView listallbooking = (ListView)rootView.findViewById(R.id.listallbooking); 

           return rootView;


    }


private void connectWithHttpGet(String email, String password ) {

        class HttpGetAsyncTask extends AsyncTask<String, Void, String>{
            @Override
            protected String doInBackground(String... params) {

                // As you can see, doInBackground has taken an Array of Strings as the argument
                //We need to specifically get the givenUsername and givenPassword
                String email = params[0];
                String password = params[1];
            //  String uuid = params[2];
                System.out.println("paramUsername: " + email + " paramPassword is : " + password + "paramuuid is: ");

                // Create an intermediate to connect with the Internet
                HttpClient httpClient = new DefaultHttpClient();

                // Sending a GET request to the web page that we want
                // Because of we are sending a GET request, we have to pass the values through the URL
                HttpGet httpGet = new HttpGet("xxxxxxxxxx?email=" + email + "&password=" + password +"&uuid=fdgsfsdfsfsf"+"&mode=booking" );
                StringBuilder stringBuilder = new StringBuilder();


                                try {
                                    HttpResponse httpResponse = httpClient.execute(httpGet);


                                    HttpEntity httpEntity = httpResponse.getEntity();
                                    String jsonStr = null;
                                    jsonStr = EntityUtils.toString(httpEntity);
                                    JSONObject jsonObj = new JSONObject(jsonStr);
                                    // Getting JSON Array node
                                    JSONObject resultObj = jsonObj.getJSONObject("result");
                                    JSONArray resultArr = resultObj.getJSONArray("result");
                                    //Log.d("Response: ", "> " + jsonStr);


                                    // looping through All Contacts
                                    for (int i = 0; i < resultArr.length(); i++) {
                                        JSONObject c = resultArr.getJSONObject(i);
                                        String booking_num = c.getString(TAG_BOOKING_NUM);
                                        String title = c.getString(TAG_TITLE);

                                /*      String splittitle= title;
                                        String [] mysplit_title = null;
                                        mysplit_title = splittitle.split("-");
                                        String First_title=mysplit_title[0];
                                        String Qoute_title=mysplit_title[1];
                                        String Username_title=mysplit_title[2];*/

                                        String status = c.getString(TAG_STATUS);
                                        String booking_start = c.getString(TAG_BOOKING_START);

                                        String my_starttime=booking_start;
                                                String [] my_date_time_start = null;
                                                my_date_time_start = my_starttime.split(" ");
                                                String Date_str_start=my_date_time_start[0];
                                                String Time_str_start=my_date_time_start[1];


                                        String booking_end = c.getString(TAG_BOOKING_END);

                                        String my_endtime=booking_start;
                                        String [] my_date_time_end = null;
                                        my_date_time_end = my_endtime.split(" ");
                                        String Date_str_end=my_date_time_end[0];
                                        String Time_str_end=my_date_time_end[1];

                                        String qoute = c.getString(TAG_QOUTE);
                                        String booking_address = c.getString(TAG_BOOKING_ADDRESS);
                                    //  System.out.println("booking_num: " + booking_num + " title is : " + title + "booking_start: "+ booking_start);

                                        JSONObject customer = c.getJSONObject(TAG_CUSTOMER);
                                        String name = customer.getString(TAG_CUSTOMER_NAME);

                                        BookingTabel db = new BookingTabel(getActivity());
                                        // tmp hashmap for single contact
                                        HashMap<String, String> result3 = new HashMap<String, String>();

                                        // adding each child node to HashMap key => value
                                        result3.put(TAG_BOOKING_NUM, booking_num);
                                        result3.put(TAG_TITLE, title);
                                        result3.put(TAG_STATUS, status);
                                        result3.put(TAG_BOOKING_START, Time_str_start);
                                        result3.put(TAG_BOOKING_END, Time_str_end);
                                        result3.put(TAG_QOUTE, qoute);
                                        result3.put(TAG_BOOKING_ADDRESS, booking_address);
                                        result3.put(TAG_CUSTOMER_NAME, name);


                                        // Hashmap for ListView
                                    //    ArrayList<HashMap<String, String>> resultList = new ArrayList<HashMap<String, String>>();

                                        // adding contact to contact list
                                        resultList.add(result3);
                                        System.out.println("resultList: " + resultList);

                                    }

                                } catch (Exception e) {
                                    // TODO Auto-generated catch block
                                    e.printStackTrace();
                                }
                                return null;


            }

            // Argument comes for this method according to the return type of the doInBackground() and
            //it is the third generic type of the AsyncTask
            @Override
            protected void onPostExecute(String result) {

         ListView listallbooking = (ListView)getActivity().findViewById(R.id.listallbooking); 

           ListAdapter adapter = new SimpleAdapter(getActivity(), resultList,
                        R.layout.list_item_allbooking,
                        new String[] { TAG_TITLE,TAG_STATUS, TAG_BOOKING_START,
                        TAG_BOOKING_END,TAG_QOUTE,TAG_BOOKING_ADDRESS,TAG_CUSTOMER_NAME }, new int[] {
                        R.id.listtitle,R.id.liststatus,
                        R.id.listbooking_start, R.id.listbooking_end,R.id.listqoute,R.id.listbooking_address,R.id.listcustomername});
                listallbooking.setAdapter(adapter);
            //  System.out.println("resultList: " + resultList);
            //    setOnItemClickListener
                listallbooking.setOnItemClickListener(new OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> arg0, View view, int postion,
                            long arg3) {
                        // TODO Auto-generated method stub
                        Intent detailesitem = new Intent(getActivity().getBaseContext(), estimates.class); 
                        startActivity(detailesitem);
                    }
                });


            }           
        }

        // Initialize the AsyncTask class
        HttpGetAsyncTask httpGetAsyncTask = new HttpGetAsyncTask();
        // Parameter we pass in the execute() method is relate to the first generic type of the AsyncTask
        // We are passing the connectWithHttpGet() method arguments to that
        httpGetAsyncTask.execute(email, password ); 

    }



}

Answer 1

为了更好地维护代码，我建议使用 Android Volley 库。您获得异步 API 来调用 rest API，回调直接提供您的 JSON 对象。

并使用 GSON 库将 JSON 转换为您定义的 Java 对象(预订)。您唯一需要做的就是定义与 JSON 结构中的键相同的 Bookings 成员变量名称。

现在您应该有一个实用方法可以通过从 Bookings 对象中读取值来插入到数据库中。

然后生成可维护的无错误代码。