¿Es posible crear una tabla sqlite en tiempo de ejecución en función del número de elementos en la matriz

Question

Tengo una lista de matrices diferente con nombres de columna. Quiero tener un método de creación generada que cree una tabla basada en la lista de arrays que he pasado. ¿Es posible tener una estructura con puede crear tabla dinámicamente? Por favor sugiera cualquier solución.

private static class OpenHelper extends SQLiteOpenHelper { 

     OpenHelper(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 
     System.out.println("openhelper1"); 

    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     Log.d("**DataHelper", "***********in oncreate"); 
     db.execSQL("CREATE TABLE " + TABLE_NAME + " (username TEXT,altnum TEXT,passkey TEXT,flag TEXT)"); 

    } 


    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     Log.w("Example", "Upgrading database, this will drop tables and recreate."); 
     db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME); 
     onCreate(db); 
    } 
} 

Answer 1

Creé mi propia clase para crear tablas e insertar valores de manera generada.

public void createDynamicDatabase(Context context,String tableName,ArrayList<String> title) { 

      Log.i("INSIDE createLoginDatabase() Method","*************creatLoginDatabase*********"); 
      try { 

       int i; 
       String querryString; 
       myDataBase = context.openOrCreateDatabase("Db",Context.MODE_WORLD_WRITEABLE, null);   //Opens database in writable mode. 
       //System.out.println("Table Name : "+tableName.get(0)); 

       querryString = title.get(0)+" VARCHAR(30),"; 
       Log.d("**createDynamicDatabase", "in oncreate"); 
       for(i=1;i<title.size()-1;i++) 
       {    
        querryString += title.get(i); 
        querryString +=" VARCHAR(30)"; 
        querryString +=","; 
       } 
       querryString+= title.get(i) +" VARCHAR(30)"; 

       querryString = "CREATE TABLE IF NOT EXISTS " + tableName + "("+querryString+");"; 

       System.out.println("Create Table Stmt : "+ querryString); 

       myDataBase.execSQL(querryString); 

      } catch (SQLException ex) { 
       Log.i("CreateDB Exception ",ex.getMessage()); 
      } 
     } 
     public void insert(Context context,ArrayList<String> array_vals,ArrayList<String> title,String TABLE_NAME) { 
      Log.d("Inside Insert","Insertion starts for table name: "+TABLE_NAME); 
      myDataBase = context.openOrCreateDatabase("Db",Context.MODE_WORLD_WRITEABLE, null);   //Opens database in writable mode. 
      String titleString=null; 
      String markString= null; 
      int i; 
      titleString = title.get(0)+","; 
      markString = "?,"; 
      Log.d("**createDynamicDatabase", "in oncreate"); 
      for(i=1;i<title.size()-1;i++) 
      {    
       titleString += title.get(i); 
       titleString +=","; 
       markString += "?,"; 
      } 
      titleString+= title.get(i); 
      markString += "?"; 

      //System.out.println("Title String: "+titleString); 
      //System.out.println("Mark String: "+markString); 


      INSERT="insert into "+ TABLE_NAME + "("+titleString+")"+ "values" +"("+markString+")"; 
      System.out.println("Insert statement: "+INSERT); 
      //System.out.println("Array size iiiiii::: "+array_vals.size()); 
      //this.insertStmt = this.myDataBase.compileStatement(INSERT); 
      int s=0; 

      while(s<array_vals.size()){ 

      System.out.println("Size of array1"+array_vals.size()); 
        //System.out.println("Size of array"+title.size()); 
      int j=1; 
      this.insertStmt = this.myDataBase.compileStatement(INSERT); 
      for(int k =0;k< title.size();k++) 
      { 

       //System.out.println("Value of column "+title+" is "+array_vals.get(k+s)); 
       //System.out.println("PRINT S:"+array_vals.get(k+s)); 
       System.out.println("BindString: insertStmt.bindString("+j+","+ array_vals.get(k+s)+")"); 
       insertStmt.bindString(j, array_vals.get(k+s)); 



       j++; 
      } 

      s+=title.size(); 

      } 
      insertStmt.executeInsert(); 
     }