Android adding dynamic row to table

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout 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"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.divakar.dynamicbuttoningrid.MainActivity">

    <Button        android:id="@+id/additembutton"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="Add row to table"         />
    <TableLayout        android:id="@+id/mTlayout"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_below="@+id/additembutton"         />
</RelativeLayout>

Mainactivity.java

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


public class MainActivity extends AppCompatActivity {

    private TableLayout table = null;
    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        table = (TableLayout)findViewById(R.id.mTlayout);

        Button additembutton = (Button) findViewById(R.id.additembutton);
        additembutton.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {

                update();
            }
        });

    }

    private void update()
    {
        TableRow tr = new TableRow(this);
        tr.setLayoutParams(new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT, TableLayout.LayoutParams.WRAP_CONTENT));

        // adding text        TextView tv = new TextView(this);
        tv.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
        tv.setText("New Entry");
        tv.setBackgroundColor(Color.parseColor("#12e7f4"));
        tr.addView(tv);

        // adding button        Button button = new Button(this);
        button.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
        button.setText("New Button");
        tr.addView(button);

        table.addView(tr, new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT, TableLayout.LayoutParams.WRAP_CONTENT));


    }}