如何从 android 中的 sqlite 中的 json 数据快速批量插入

Question

I have written this code to insert json data in to sqlite in android its working fine but i have 50000+ row to insert so its taking so much time to insert into sqlite database. So how can I insert this data in fastest way please kindly give me the code I am very new in android. thank in advance.

Below i have written my code to insert data

 private void insertItemDetails() {
        final ProgressDialog loading = ProgressDialog .show(this,"Updating Data From Tally","Please wait");

        StringRequest stringRequest=new StringRequest(Request.Method.GET, url,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        try {
                            loading.show();
                            itemDatabaseCon.open();
                            itemDatabaseCon.delete();
                            itemDatabaseCon.close();

                            itemDatabaseCon.open();
                            itemDatabaseCon.createTable();

                            int a=response.length();
//                            boolean b=a.equalsIgnoreCase("no");
                            Log.d("value", String.valueOf(a));

                            if (a==2) {
                                Log.d("inside item if loop ",response);
                            }
                            else {

                                JSONObject jsonObject = new JSONObject(response);
                                JSONArray array = jsonObject.getJSONArray("posts");
                                for (int i = 0; i < array.length(); i++) {
                                    JSONObject ob = array.getJSONObject(i);

                                    String stockid = ob.getString("stockid");
                                    String itemname = ob.getString("itemname");
                                    String group = ob.getString("group");
                                    String baseunit = ob.getString("baseunit");
                                    String alternateunit = ob.getString("alternateunit");
                                    String gst = ob.getString("gst");
                                    String hsn = ob.getString("hsn");
                                    String mrp = ob.getString("mrp");
                                    String sdtsellrate = ob.getString("sdtsellrate");
                                    String closingstock = ob.getString("closingstock");


                                    ContentValues contentValues = new ContentValues();
                                    contentValues.put(Constant2.key_itemstockid, stockid);
                                    contentValues.put(Constant2.key_itemname, itemname);
                                    contentValues.put(Constant2.key_itemgroup, group);
                                    contentValues.put(Constant2.key_itembaseunit, baseunit);
                                    contentValues.put(Constant2.key_itemalternateunit, alternateunit);
                                    contentValues.put(Constant2.key_itemgst, gst);
                                    contentValues.put(Constant2.key_itemhsn, hsn);
                                    contentValues.put(Constant2.key_itemmrp, mrp);
                                    contentValues.put(Constant2.key_itemsdtsellrate, sdtsellrate);
                                    contentValues.put(Constant2.key_itemclosingstock, closingstock);

                                    itemDatabaseCon.insert(Constant2.Table_name, contentValues);
                                }
                            }
                            loading.dismiss();

                        } catch (JSONException e) {
                            e.printStackTrace();
                        }

                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.d("got api error ffff" , error.getMessage());

            }
        });
        RequestQueue requestQueue= Volley.newRequestQueue(this);
        requestQueue.add(stringRequest);


    }

Here is my database controller code.

public class ItemDatabaseCon {


    String TAG = "DBAdapter";


    private SQLiteDatabase db;
    private ItemDatabaseCon.DBHelper dbHelper;

    public ItemDatabaseCon (Context context) {
        dbHelper = new ItemDatabaseCon.DBHelper(context);
    }

    public void open() {
        if (null == db || !db.isOpen()) {
            try {
                db = dbHelper.getWritableDatabase();
            } catch (SQLiteException sqLiteException) {
            }
        }
    }

    public void close() {
        if (db != null) {
            db.close();
        }
    }

    public int insert(String table, ContentValues values) {
        try {
            db = dbHelper.getWritableDatabase();
            int y = (int) db.insert(table, null, values);
            db.close();
            Log.e("Data Inserted", "Item Data Inserted");
            Log.e("number of row", y + "");
            return y;
        } catch (Exception ex) {
            Log.e("Error Insert", ex.getMessage().toString());
            return  0;
        }
    }

    public void delete() {
        db.execSQL("DROP TABLE IF EXISTS " + Constant2.Table_name);
    }

    public int getCount()
    {
        db = dbHelper.getWritableDatabase();
        String qry="SELECT * FROM "+Constant2.Table_name;
        Cursor cursor=db.rawQuery(qry,null);
        return cursor.getCount();


    }
    public void createTable()
    {
        String create_sql = "CREATE TABLE IF NOT EXISTS " + Constant2.Table_name + "("
                + Constant2.key_id + " INTEGER PRIMARY KEY AUTOINCREMENT,"
                + Constant2.key_itemstockid + " TEXT  ," + Constant2.key_itemname + " TEXT ," + Constant2.key_itemgroup + " TEXT ,"
                + Constant2.key_itembaseunit + " TEXT ,"+ Constant2.key_itemalternateunit + " TEXT ,"+ Constant2.key_itemgst + " TEXT ,"
                + Constant2.key_itemhsn + " TEXT ,"+ Constant2.key_itemmrp + " TEXT ,"+ Constant2.key_itemsdtsellrate + " TEXT ,"
                + Constant2.key_itemclosingstock + " TEXT " + ")";
        db.execSQL(create_sql);
    }

    public Cursor getAllRow(String table) {
        return db.query(table, null, null, null, null, null, Constant2.key_id);
    }

    private class DBHelper extends SQLiteOpenHelper {


        public DBHelper(Context context) {
            super(context, Constant2.DB_Name, null, Constant2.Db_Version);
        }

        @Override
        public void onCreate(SQLiteDatabase db) {

            String create_sql = "CREATE TABLE IF NOT EXISTS " + Constant2.Table_name + "("
                    + Constant2.key_id + " INTEGER PRIMARY KEY AUTOINCREMENT,"
                    + Constant2.key_itemstockid + " TEXT  ," + Constant2.key_itemname + " TEXT ," + Constant2.key_itemgroup + " TEXT ,"
                    + Constant2.key_itembaseunit + " TEXT ,"+ Constant2.key_itemalternateunit + " TEXT ,"+ Constant2.key_itemgst + " TEXT ,"
                    + Constant2.key_itemhsn + " TEXT ,"+ Constant2.key_itemmrp + " TEXT ,"+ Constant2.key_itemsdtsellrate + " TEXT ,"
                    + Constant2.key_itemclosingstock + " TEXT " + ")";
            db.execSQL(create_sql);
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            db.execSQL("DROP TABLE IF EXISTS " + Constant2.Table_name);
        }

    }



   

}

Answer 1

You could do the inserts inside a single SQLite transaction. This would significantly reduce the disk writes from 50000+ to very few.

That is before the loops starts begin a transaction using the SQLiteDatabase's beginTransaction() method. After the loop has completed (all rows have been inserted) successfully use the setTransactionSuccessful() method followed by the endTransactionMethod()

• Note if you do not setTransactionSuccessful then the changes would be rolled back (so if you encounter an issue/error and want the changes (inserts) to not be applied use appropriate logic so that the setTransactionSuccessful is skipped but that the endTransaction is run)

eg The following might be suitable:-

                    ....
                    else {
                        itemDatabaseCon.beginTransaction(); //<<<<<<<<<< ADDDED start the transaction
                        JSONObject jsonObject = new JSONObject(response);
                        JSONArray array = jsonObject.getJSONArray("posts");
                        for (int i = 0; i < array.length(); i++) {
                            JSONObject ob = array.getJSONObject(i);

                            String stockid = ob.getString("stockid");
                            String itemname = ob.getString("itemname");
                            String group = ob.getString("group");
                            String baseunit = ob.getString("baseunit");
                            String alternateunit = ob.getString("alternateunit");
                            String gst = ob.getString("gst");
                            String hsn = ob.getString("hsn");
                            String mrp = ob.getString("mrp");
                            String sdtsellrate = ob.getString("sdtsellrate");
                            String closingstock = ob.getString("closingstock");


                            ContentValues contentValues = new ContentValues();
                            contentValues.put(Constant2.key_itemstockid, stockid);
                            contentValues.put(Constant2.key_itemname, itemname);
                            contentValues.put(Constant2.key_itemgroup, group);
                            contentValues.put(Constant2.key_itembaseunit, baseunit);
                            contentValues.put(Constant2.key_itemalternateunit, alternateunit);
                            contentValues.put(Constant2.key_itemgst, gst);
                            contentValues.put(Constant2.key_itemhsn, hsn);
                            contentValues.put(Constant2.key_itemmrp, mrp);
                            contentValues.put(Constant2.key_itemsdtsellrate, sdtsellrate);
                            contentValues.put(Constant2.key_itemclosingstock, closingstock);

                            itemDatabaseCon.insert(Constant2.Table_name, contentValues);
                        }
                        itemDatabaseCon.setTransactionSuccessful(); //<<<<<<<<<< ADDED indicate that changes (inserts) are all good
                        itemDatabaseCon.endTransaction(); //<<<<<<<<<< ADDED end the transaction
                    }
                    loading.dismiss();
                    ....

• //<<<<<<<<<< indicates the changed/added code

Edit

However, considering the insert method the above will have no affect as you are closing the database after an insert. Closing the database and then re-opening it is very costly resource wise.

As such to benefit from running all the inserts in a single transaction you could use:-

public int insert(String table, ContentValues values) {
    try {
        db = dbHelper.getWritableDatabase();
        int y = (int) db.insert(table, null, values);
        //db.close(); //<<<<<<<<<< Commented out so as to not close the database
        Log.e("Data Inserted", "Item Data Inserted");
        Log.e("number of row", y + "");
        return y;
    } catch (Exception ex) {
        Log.e("Error Insert", ex.getMessage().toString());
        return  0;
    }
}