<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"

    tools:context="${relativePackage}.${activityClass}"

     xmlns:app="http://schemas.android.com/apk/res/com.kale.gridlayout">

    <!-- 六行四列 -->

    <android.support.v7.widget.GridLayout

        android:id="@+id/root_gridLayout_id"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        app:rowCount="6"

        app:columnCount="4">

        <TextView

            android:layout_width="match_parent"

            android:layout_height="100dp"

            app:layout_columnSpan="4"

            android:text="Large Text"

            android:textAppearance="?android:attr/textAppearanceLarge" />

        <Button

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            app:layout_gravity="center_horizontal|top"

            app:layout_columnSpan="4"

            android:text="Button" />

    </android.support.v7.widget.GridLayout>

</RelativeLayout>

package com.kale.gridlayout;

import android.app.Activity;

import android.os.Bundle;

import android.support.v7.widget.GridLayout;

import android.view.Gravity;

import android.widget.Button;

public class MainActivity extends Activity {

    String [] chars = new String[]{

        "7","8","9","÷",

        "4","5","6","x",

        "1","2","3","-",

        ".","0","=","+"

    };

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        GridLayout gLayout = (GridLayout)findViewById(R.id.root_gridLayout_id);

        for (int i = 0; i < chars.length; i++) {

            Button bt = new Button(this);

            bt.setText(chars[i]);

            bt.setTextSize(40);

            //指定该组件所占的行

            GridLayout.Spec rowSpec = GridLayout.spec(i/4 + 2);

            //指定该组件所占的列

            GridLayout.Spec columnSpec = GridLayout.spec(i % 4);

            //按照设置好的行和列来建立对象

            GridLayout.LayoutParams params = new GridLayout.LayoutParams(rowSpec,columnSpec);

            //指定该组件占满父控件

            params.setGravity(Gravity.FILL);

            gLayout.addView(bt,params);

        }

    }

}