gridlaylout 简单布局

package com.example.gridlayout;

import android.app.Activity;

import android.os.Bundle;

import android.view.Gravity;

import android.widget.Button;

import android.widget.GridLayout;

public class MainGrid extends Activity {

    GridLayout grd;

    String[] chas=new String[]

            {

              "","","","*"

              ,"","","","/"

              ,"","","","+"

              ,"",".","=","-"

            };

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

       setContentView(R.layout.activity_main_grid);

        grd=(GridLayout)findViewById(R.id.root);

        for(int i=;i<chas.length;i++)

        {

            Button bt=new Button(this);

             bt.setText(chas[i]);

             bt.setTextSize();

             bt.setHeight();

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

                // 指定该组件所在列

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

                GridLayout.LayoutParams params = new GridLayout.LayoutParams(

                        rowSpec , columnSpec);

                // 指定该组件占满父容器

                params.setGravity(Gravity.FILL);

                grd.addView(bt , params);

        }

    }

}

<?xml version="1.0" encoding="utf-8" ?>

<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:rowCount="6"

    android:columnCount="4"

    android:id="@+id/root"

    >

<!-- 定义一个横跨4列的文本框，

并设置该文本框的前景色、背景色等属性  -->

<TextView

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:layout_columnSpan="4"

    android:textSize="50sp"

    android:layout_marginLeft="4px"

    android:layout_marginRight="4px"

    android:padding="5px"

    android:layout_gravity="right"

    android:background="#eee"

    android:textColor="#000"

    android:text="0"/>

<!-- 定义一个横跨4列的按钮 -->

<Button

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:layout_columnSpan="4"

    android:text="清除"/>

</GridLayout>

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.gridlayout"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="17"

        android:targetSdkVersion="21" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".MainGrid"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>