Kotlin03.gridLayout计算机界面_Android

Kotlin03.gridLayout计算机界面

MainActivity.kt

package com.example.gridlayout

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.Gravity
import android.widget.Button
import android.widget.GridLayout

class MainActivity : AppCompatActivity() {

    private var chars = arrayOf("7", "8", "9", "÷",
            "4", "5", "6", "×",
            "1", "2", "3", "-",
            ".", "0", "=", "+")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        var gridLayout = findViewById<GridLayout>(R.id.root)
        for (i in chars.indices) {
            val bn = Button(this)
            bn.text = chars[i]
            bn.textSize = 40F
            bn.setPadding(5, 35, 5, 35)
            val rowSpec = GridLayout.spec(i / 4 + 2)
            val columSpace = GridLayout.spec(i % 4)
            val  params = GridLayout.LayoutParams(rowSpec, columSpace)
            params.setGravity(Gravity.FILL)
            gridLayout.addView(bn, params)
        }
    }
}

activity_main.xml

<?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="2pt"
        android:layout_marginRight="2pt"
        android:padding="3pt"
        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>

本文地址：https://blog.csdn.net/augfun/article/details/107882131