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龙采做网站要多少钱/怎么建立信息网站平台

news 2025/7/1 3:36:20

龙采做网站要多少钱,怎么建立信息网站平台,电子商务网站建设期末题库,枣庄三合一网站开发公司基本说明实现了两列计分，每列三个按钮，分别是1，2，3在底部实现了两个按钮，实现了一步的撤销和重置功能补充：撤销一步的话可以用一个变量来实现,如果撤销多步，可以采用栈的方式 MainActivity代…

基本说明

实现了两列计分，每列三个按钮，分别是+1，+2，+3
在底部实现了两个按钮，实现了一步的撤销和重置功能
补充：撤销一步的话可以用一个变量来实现,如果撤销多步，可以采用栈的方式

MainActivity代码

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.databinding.DataBindingUtil
import androidx.lifecycle.Observer
import androidx.lifecycle.ViewModelProvider
import androidx.lifecycle.ViewModelProviders
import com.example.viewmodetest.databinding.ActivityMainBindingclass MainActivity : AppCompatActivity() {lateinit var binding :ActivityMainBindingoverride fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)binding=DataBindingUtil.setContentView(this,R.layout.activity_main)var ViewModelWithLiveData:mViewModel=ViewModelProvider(this).get(mViewModel::class.java);ViewModelWithLiveData.getANumber().observe(this, Observer { binding.textView3.text=it.toString()})ViewModelWithLiveData.getBNumber().observe(this, Observer { binding.textView4.text=it.toString()})binding.button2.setOnClickListener{ViewModelWithLiveData.addA(1);}binding.button3.setOnClickListener{ViewModelWithLiveData.addB(1);}binding.button4.setOnClickListener{ViewModelWithLiveData.addA(2);}binding.button5.setOnClickListener{ViewModelWithLiveData.addB(2);}binding.button6.setOnClickListener{ViewModelWithLiveData.addA(3);}binding.button7.setOnClickListener{ViewModelWithLiveData.addB(3);}binding.imageButton2.setOnClickListener{ViewModelWithLiveData.back();}binding.imageButton3.setOnClickListener{ViewModelWithLiveData.reset();}}
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<layout 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"><data></data><androidx.constraintlayout.widget.ConstraintLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><androidx.constraintlayout.widget.Guidelineandroid:id="@+id/guideline2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="vertical"app:layout_constraintGuide_end="217dp" /><androidx.constraintlayout.widget.Guidelineandroid:id="@+id/guideline4"android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="horizontal"app:layout_constraintGuide_begin="-8dp" /><androidx.constraintlayout.widget.Guidelineandroid:id="@+id/guideline5"android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="horizontal"app:layout_constraintGuide_begin="-24dp" /><androidx.constraintlayout.widget.Guidelineandroid:id="@+id/guideline6"android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="horizontal"app:layout_constraintGuide_begin="96dp" /><TextViewandroid:id="@+id/textView"android:layout_width="115dp"android:layout_height="84dp"android:layout_marginTop="8dp"android:text="AteamScore"app:layout_constraintEnd_toStartOf="@+id/guideline2"app:layout_constraintHorizontal_bias="0.0"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" /><TextViewandroid:id="@+id/textView2"android:layout_width="148dp"android:layout_height="69dp"android:text="@string/tb"app:layout_constraintBottom_toTopOf="@+id/guideline6"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintHorizontal_bias="0.558"app:layout_constraintStart_toStartOf="@+id/guideline2"app:layout_constraintTop_toTopOf="parent"app:layout_constraintVertical_bias="0.333" /><TextViewandroid:id="@+id/textView3"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="0"app:layout_constraintBottom_toTopOf="@+id/button2"app:layout_constraintEnd_toStartOf="@+id/guideline2"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="@+id/guideline6" /><TextViewandroid:id="@+id/textView4"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="0"app:layout_constraintBottom_toTopOf="@+id/button3"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="@+id/guideline2"app:layout_constraintTop_toTopOf="@+id/guideline6" /><Buttonandroid:id="@+id/button2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="+1"app:layout_constraintBottom_toTopOf="@+id/button4"app:layout_constraintEnd_toStartOf="@+id/guideline2"app:layout_constraintHorizontal_bias="0.526"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent"app:layout_constraintVertical_bias="0.814" /><Buttonandroid:id="@+id/button3"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="+1"app:layout_constraintBottom_toTopOf="@+id/button5"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintHorizontal_bias="0.491"app:layout_constraintStart_toStartOf="@+id/guideline2"app:layout_constraintTop_toTopOf="parent"app:layout_constraintVertical_bias="0.814" /><Buttonandroid:id="@+id/button4"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginStart="16dp"android:text="+2"app:layout_constraintBottom_toTopOf="@+id/button6"app:layout_constraintEnd_toStartOf="@+id/guideline2"app:layout_constraintHorizontal_bias="0.447"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="@+id/textView"app:layout_constraintVertical_bias="0.835" /><Buttonandroid:id="@+id/button5"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="+2"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintHorizontal_bias="0.495"app:layout_constraintStart_toStartOf="@+id/guideline2"app:layout_constraintTop_toTopOf="parent"app:layout_constraintVertical_bias="0.401" /><Buttonandroid:id="@+id/button6"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="+3"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toStartOf="@+id/guideline2"app:layout_constraintHorizontal_bias="0.526"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent"app:layout_constraintVertical_bias="0.54" /><Buttonandroid:id="@+id/button7"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="+3"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintHorizontal_bias="0.758"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent"app:layout_constraintVertical_bias="0.54" /><ImageButtonandroid:id="@+id/imageButton2"android:layout_width="wrap_content"android:layout_height="wrap_content"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toStartOf="@+id/guideline2"app:layout_constraintHorizontal_bias="0.546"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent"app:layout_constraintVertical_bias="0.748"app:srcCompat="@android:drawable/ic_menu_revert"tools:ignore="SpeakableTextPresentCheck" /><ImageButtonandroid:id="@+id/imageButton3"android:layout_width="wrap_content"android:layout_height="wrap_content"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintHorizontal_bias="0.777"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent"app:layout_constraintVertical_bias="0.748"app:srcCompat="@android:drawable/ic_popup_sync" /></androidx.constraintlayout.widget.ConstraintLayout>
</layout>

mViewModel代码

package com.example.viewmodetestimport androidx.lifecycle.ViewModel
import androidx.lifecycle.MutableLiveDatapublic class mViewModel : ViewModel() {private var Anumber: MutableLiveData<Int>? = nullprivate var Bnumber: MutableLiveData<Int>? = nullprivate var ABack:Int=0;private var BBack:Int=0;public fun getANumber(): MutableLiveData<Int> {if (Anumber == null) {Anumber = MutableLiveData()Anumber!!.value = 0}return Anumber!!}public fun getBNumber(): MutableLiveData<Int> {if (Bnumber == null) {Bnumber = MutableLiveData()Bnumber!!.value = 0}return Bnumber!!}public fun addA(n: Int) {ABack= Anumber!!.value!!BBack= Bnumber!!.value!!Anumber!!.value = Anumber!!.value!! + n}public fun addB(n:Int){ABack= Anumber!!.value!!BBack= Bnumber!!.value!!Bnumber!!.value = Bnumber!!.value!! + n}public fun reset(){ABack= Anumber!!.value!!BBack= Bnumber!!.value!!Anumber!!.value=0;Bnumber!!.value=0;}public fun back(){Anumber!!.value=ABack;Bnumber!!.value=BBack;}
}