Enter fix to a Custom GridView

Response to the last comment :

  

Well, thanks before everything, in fact that had proved the same, but   I would like a certain number of cells to be generated, for example   100 and that the array data is entered and occupy only the cells   correspond, since in that way only the cells are generated   depending on the size of the arrangement: / I do not know if there will be a way to do   that, generate x number of cells and put the arrangement and leaving empty   the rest, that is, if 100 cells are generated and the array only has   10, that the 90 remaining cells appear to me.

We are going to add one more parameter to the constructor of your adapter that will be a ArrayList of Celdas that will have an attribute called arreglo and fill in the gridview with its data.

Cell:

   public class Celda{

        private String arreglo;

        public Celda(String arreglo) {
            this.arreglo = arreglo;
        }

        public void setArreglo(String arreglo) {
            this.arreglo = arreglo;
        }

        public String getArreglo() {
            return arreglo;
        }
    }

Cell ArrayList

ArrayList<Celda> alCeldas = new ArrayList<>();
    for (int i = 0; i < 100; i++) {
        String arreglo = "";
        alCeldas.add(new Celda(arreglo));
    }
customgridviewadapter = new CustomGridViewAdapter(getActivity(), alCeldas);
        gridview.setAdapter(customgridviewadapter);

Adapter:

public class CustomGridViewAdapter extends BaseAdapter
{
    private Context context;
    private ArrayList<Celda> alCeldas;
    public CustomGridViewAdapter(Context context, ArrayList<Celda> alCeldas)
    {
        //super(context, 0);
        this.context=context;
        this.alCeldas= alCeldas;

    }

public int getCount()
{
    return alCeldas.size();
}

@Override
public Celda getItem(int position) {
    return alCeldas.get(position);
}

@Override
public long getItemId(int position) {
    return 0;
}

public void insetarArreglo(String arreglo, int posicionArreglo){
   alCeldas.get(posicionArreglo).setArreglo("arreglo");
   this.notifyDataSetChanged();
}

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
    View row = convertView;
 //Cargo un Custom Edittext en cada celda
        LayoutInflater inflater = ((Activity) context).getLayoutInflater();
        row = inflater.inflate(R.layout.grid_item, parent, false);

        EditText editTextCelda = (EditText) row.findViewById(R.id.gridEdittext);
        editTextCelda.setGravity(Gravity.TOP | Gravity.LEFT);
        editTextCelda.setText(alCeldas.get(position).getArreglo());// con esta linea rellenamos los EditText del gridview con los datos del ArrayList

        final int sdk = Build.VERSION.SDK_INT;


    if (editTextCelda.getText().toString().trim().equals(""))
    {
        if(sdk < Build.VERSION_CODES.JELLY_BEAN) {
            editTextCelda.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.rounded_edittext));
        } else {
            editTextCelda.setBackground( context.getResources().getDrawable(R.drawable.rounded_edittext));
        }

    } else{
        editTextCelda.setBackgroundColor(Color.WHITE);
    }
    return row;
    }

}

Insert an array:

If you notice the adapter has a method called insertarArreglo where you have to put the position of the cell where you want to insert the array:

customgridviewadapter.insertarArreglo("miArreglo", posicionDelaCelda); 

That's it, Greetings.

The way you should do this is:

modify the array, send it to Adapter , in this case CustomGridViewAdapter() and rerun:

   .notifyDataSetChanged();

I think it's the only way, to have a dynamic data array.