Fill the entire screen area through Gridview cells

Question

I have a project that has a Gridview with several cells and I need the cells that make up Gridview to fill the entire useful area of the Smartphone screen. With the following XML code it did not work:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical">

<LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#e4c5c5">

    <GridView
        android:id="@+id/gridView2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:verticalSpacing="2dp"
        android:horizontalSpacing="2dp"
        android:numColumns="7" />


    </LinearLayout>

</LinearLayout>

 import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.List;

public class CelulasAdapter extends BaseAdapter {

    private Context context;
    private List<DiasMesApoio> arrayListDiasMes;

    private int width;
    private int height;

    // Construtor:
    public CelulasAdapter(Context context, List<DiasMesApoio> arrayListDiasMes, int width, int height) {
        this.context = context;
        this.arrayListDiasMes = arrayListDiasMes;
        this.width = width;
        this.height = height;
    }

    @Override
    public int getCount() {
        return arrayListDiasMes.size();
    }

    @Override
    public Object getItem(int position) {
        return arrayListDiasMes.get(position);
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View viewLayout;
        ViewHolder viewholder;

        if(convertView == null){

            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            viewLayout = inflater.inflate(R.layout.layout_celulas_gridview, null);

            viewholder = new ViewHolder();

            viewholder.textView1 = (TextView) viewLayout.findViewById(R.id.textView1);

            viewLayout.setTag(viewholder);

            convertView = viewLayout;

        } else {

            viewholder = (ViewHolder) convertView.getTag();

            viewLayout = convertView;
        }

        viewLayout.setMinimumHeight(GridViewActivity.height/6);

        DiasMesApoio diasMesApoio = arrayListDiasMes.get(position);

        viewholder.textView1.setText(String.valueOf(diasMesApoio.getDia()));

        return viewLayout;
    }

    private class ViewHolder {
        TextView textView1;
    }
}