<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.codedocu.test02.MainActivity">



    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="49dp"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="16dp"
        android:onClick="btnStart_onClick"
        android:text="START"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TableLayout
        android:id="@+id/table_main"
        android:layout_width="368dp"
        android:layout_height="167dp"
        android:layout_marginTop="96dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:background="#E0E0E0"
        >

        <TableRow>
            <TextView
                android:text="Col_1:50"
                android:layout_weight="50"
                />
            <TextView
                android:text="Col_2:50"
                android:layout_weight="50"
                />
        </TableRow>

    </TableLayout>

</android.support.constraint.ConstraintLayout>

    public void btnStart_onClick(View view) {
        create_Table();
    }

    public void create_Table(){
        //-------< create_Table() >--------
        TableLayout tbl=findViewById(R.id.table_main);

        //--< Row >--
        TableRow row=new TableRow(this);
        row.setPadding(2,2,2,2);


        //< cell1 >
        TextView lbl1=new TextView(this);
        lbl1.setText("Cell1");
        lbl1.setTextColor(Color.RED);
        lbl1.setBackgroundColor(Color.YELLOW);

        row.addView(lbl1);
        //</ cell1 >

        //< cell2 >
        TextView lbl2=new TextView(this);
        lbl2.setText("Cell2");
        row.addView(lbl2);
        //</ cell1 >
        //--</ Row >--

        //< add to table >
        tbl.addView(row);
        //</ add to table >
        //-------</ create_Table() >--------
    }

}

package com.codedocu.test02;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.CheckBox;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void btnStart_onClick(View view) {
        create_Table();
    }

    public void create_Table(){
        //-------< create_Table() >--------
        TableLayout tbl=findViewById(R.id.table_main);

        //--< Row >--
        TableRow row=new TableRow(this);
        row.setPadding(2,2,2,2);


        //< cell1 >
        TextView lbl1=new TextView(this);
        lbl1.setText("Cell1");
        lbl1.setTextColor(Color.RED);
        lbl1.setBackgroundColor(Color.YELLOW);

        row.addView(lbl1);
        //</ cell1 >

        //< cell2 >
        TextView lbl2=new TextView(this);
        lbl2.setText("Cell2");
        row.addView(lbl2);
        //</ cell1 >
        //--</ Row >--

        //< add to table >
        tbl.addView(row);
        //</ add to table >
        //-------</ create_Table() >--------
    }

}