1
File Main.axml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:minWidth="25px"
android:minHeight="25px"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/linearLayout1">
<LinearLayout
android:orientation="vertical"
android:minWidth="25px"
android:minHeight="25px"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/linearLayout2">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/linearLayout3"
android:weightSum="3"
android:layout_gravity="center_vertical">
<TextView
android:text="Chiều dài"
android:layout_width="0dp"
android:layout_height="match_parent"
android:id="@+id/tvChieuDai"
android:layout_weight="1"
android:gravity="center_vertical"
android:layout_margin="5dp" />
<EditText
android:layout_width="0dp"
android:layout_height="match_parent"
android:id="@+id/edtChieuDai"
android:layout_weight="2"
android:hint="Nhập chiều dài"
android:layout_margin="5dp" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/linearLayout4"
android:weightSum="3"
android:layout_gravity="center_vertical">
<TextView
android:text="Chiều rộng"
android:layout_width="0dp"
android:layout_height="match_parent"
android:id="@+id/tvChieuRong"
android:layout_weight="1"
android:gravity="center_vertical"
android:layout_margin="5dp" />
<EditText
android:layout_width="0dp"
android:layout_height="match_parent"
android:id="@+id/edtChieuRong"
android:layout_weight="2"
android:hint="Nhập chiều rộng"
android:layout_margin="5dp" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:minWidth="25px"
android:minHeight="25px"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="2"
android:id="@+id/linearLayout5">
<Button
android:text="Tính diện tích"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:id="@+id/btntinhDT"
android:layout_weight="1" />
<Button
android:text="Tính chu vi"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:id="@+id/btntinhCV"
android:layout_weight="1" />
</LinearLayout>
<TextView
android:text="Diện tích hình chữ nhật"
android:layout_width="match_parent"
android:layout_height="388.5dp"
android:id="@+id/tvKetQua"
android:layout_marginBottom="9.0dp"
android:layout_margin="5dp"
android:gravity="center"
android:textSize="25dp" />
</LinearLayout>
2
.Lớp MainActivity.cs
using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using HinhCN.Resources.Active;
namespace HinhCN
{
[Activity(Label = "HinhCN_LinhTran", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{
// int count = 1;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
//get id from main.axml
EditText edtChieuDai = FindViewById<EditText>(Resource.Id.edtChieuDai);
EditText edtChieuRong = FindViewById<EditText>(Resource.Id.edtChieuRong);
TextView tvChieuDai = FindViewById<TextView>(Resource.Id.tvChieuDai);
TextView tvChieuRong = FindViewById<TextView>(Resource.Id.tvChieuRong);
TextView tvKetQua = FindViewById<TextView>(Resource.Id.tvKetQua);
Button btntinhDienTich = FindViewById<Button>(Resource.Id.btntinhDT);
Button btntinhChuVi = FindViewById<Button>(Resource.Id.btntinhCV);
btntinhDienTich.Click += delegate {
int chieudai = Int32.Parse(edtChieuDai.Text.ToString());
int chieuRong = Int32.Parse(edtChieuRong.Text.ToString());
HinhCNN hcn = new HinhCNN(chieudai, chieuRong);
tvKetQua.Text = string.Format("Dien tich cua hinh chu nhat la:{0}", hcn.tinhDienTich());
};
btntinhChuVi.Click += delegate {
int chieudai = Int32.Parse(edtChieuDai.Text.ToString());
int chieuRong = Int32.Parse(edtChieuRong.Text.ToString());
HinhCNN hcn = new HinhCNN(chieudai, chieuRong);
tvKetQua.Text = string.Format("Dien tich cua hinh chu nhat la:{0}", hcn.tinhChuVi());
};
}
}
}
3.Lớp HinhCNN.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
namespace HinhCN.Resources.Active
{
class HinhCNN
{
private int chieuRong;
private int chieuDai;
public HinhCNN(int cdai, int crong)
{
this.chieuDai = cdai;
this.chieuRong = crong;
}
public void setChieuDai(int cdai)
{
this.chieuDai = cdai;
}
public int getChieuDai()
{
return this.chieuDai;
}
public void setChieuRong(int crong)
{
this.chieuRong = crong;
}
public int getChieuRong()
{
return this.chieuRong;
}
public int tinhDienTich()
{
return this.chieuRong * this.chieuDai;
}
public int tinhChuVi()
{
return (this.chieuDai + this.chieuRong) * 2;
}
}
}
Link full project:
https://drive.google.com/drive/u/0/my-drive
