How to insert double and float values to sqlite?

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情书的邮戳 2021-02-02 05:12

Following is my db creation code.

@Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(\"CREATE TABLE \" + TABLE_NAME + \" (\" + 
                  


        
5条回答
  •  旧时难觅i
    2021-02-02 05:43

        enter code here
    
    
    
    
    package in.my;
    
    import android.content.ContentValues;
    
    import android.content.Context;
    
    import android.database.Cursor;
    
    import android.database.SQLException;
    
    import android.database.sqlite.SQLiteDatabase;
    
    import android.database.sqlite.SQLiteOpenHelper;
    
    public class DBAdapter {    
        private final Context context; 
        private DatabaseHelper DBHelper;
    
        private SQLiteDatabase db;
    
        private static final String DATABASE_NAME = "helper.db";
    
        private static final int DATABASE_VERSION = 1;
    
        public static final String KEY_ID = "_id";
    
        private static final String Table_Record =
    
            "create table Student (_id integer primary key autoincrement, "
            + "Name text not null,rate integer, Phone text not null,Salary text not null,email text not null,address text not null,des text not null,qual text not null,doj text not null);";
    
    
        public DBAdapter(Context ctx) 
        {
            this.context = ctx;
            DBHelper = new DatabaseHelper(context);
        }
    
        private class DatabaseHelper extends SQLiteOpenHelper
        {
    
            public DatabaseHelper(Context context)
                     {
                super(context, DATABASE_NAME, null, DATABASE_VERSION);
                // TODO Auto-generated constructor stub
            }
    
            @Override
            public void onCreate(SQLiteDatabase db) {
                // TODO Auto-generated method stub
    
                db.execSQL(Table_Record);
    
            }
    
            @Override
            public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
                // TODO Auto-generated method stub
    
            }
        }
    
            public DBAdapter open() throws SQLException
            {
                db = DBHelper.getWritableDatabase();
                return DBAdapter.this;
            }
    
            //---closes the database---
            public void close() 
            {
                DBHelper.close();
            }
    
            public long insertTitle(String name,String phone,String web,String des,String address,String doj,String qual,String sal,int rate) 
            {
                ContentValues initialValues = new ContentValues();
                initialValues.put("Name", name);
                initialValues.put("Phone", phone);
                initialValues.put("email", web);
    
    
                initialValues.put("des", des);
                initialValues.put("Salary", sal);
                initialValues.put("qual", qual);
                initialValues.put("address", address);
                initialValues.put("doj", doj);
                initialValues.put("rate", rate);
    
                return db.insert("Student", null, initialValues);
            }
    
            public boolean deleteTitle(long rowId) 
            {
                return db.delete("Student", KEY_ID + 
                        "=" + rowId, null) > 0;
            }
    
            public boolean UpdateTitle(long id,String name,String phone,String web,String des,String address,String doj,String qual,String sal,int rate) 
            {
                ContentValues initialValues = new ContentValues();
                initialValues.put("Name", name);
                initialValues.put("Phone", phone);
                initialValues.put("email", web);
                initialValues.put("des", des);
                initialValues.put("qual", qual);
                initialValues.put("Salary", sal);
                initialValues.put("address", address);
                initialValues.put("doj", doj);          
                initialValues.put("rate", rate);
                return db.update("Student",initialValues, KEY_ID + "=" + id, null)>0;
    
                //return db.insert("Student", null, initialValues);
            }
    
            public Cursor getAllRecords()
            {
                return db.query("Student", new String[] {
                        KEY_ID,
                        "Name", 
                        "Phone",
                        "email",
                        "address", 
                        "des",
                        "qual",
                        "doj",
                        "Salary",
                        "rate"
    
                },
                        null, 
                        null, 
                        null, 
                        null, 
                        null);
            }
        }
    

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