Code Class KhachHang
package com.example.macbookpro.dtsondctinhtienbansach;
public class KhachHang {
public String tenKh;
public Integer slMua;
public Boolean laVip;
public final Integer GiaBan=20000;
public KhachHang() {
}
public KhachHang(Boolean laVip, Integer slMua, String tenKh) {
this.laVip = laVip;
this.slMua = slMua;
this.tenKh = tenKh;
}
public Integer getGiaBan() {
return GiaBan;
}
public Boolean getLaVip() {
return laVip;
}
public Integer getSlMua() {
return slMua;
}
public String getTenKh() {
return tenKh;
}
public void setLaVip(Boolean laVip) {
this.laVip = laVip;
}
public void setSlMua(Integer slMua) {
this.slMua = slMua;
}
public void setTenKh(String tenKh) {
this.tenKh = tenKh;
}
public double tinhThanhTien()
{
return (laVip?slMua*GiaBan*0.9:slMua*GiaBan);
}
}
Code Class DanhSachKhachHang
package com.example.macbookpro.dtsondctinhtienbansach;
import java.util.ArrayList;
public class DanhSachKhachHang {
ArrayList<KhachHang>dsKhachHang = new ArrayList<KhachHang>();
// tao ham them khach hang vao dsKhachHang public void themKh(KhachHang kh)
{
dsKhachHang.add(kh);
}
//Tao ham tinh tong doanh thu public Double tongDoanhThu()
{
double tdt=0.0;
for (KhachHang kh:dsKhachHang)
{
tdt += kh.tinhThanhTien();
}
return tdt;
}
// Tao ham tinh tong khach hang public Integer tongKhachHang()
{
return dsKhachHang.size();
}
// Tao ham tinh tong khach VIP public Integer tongKhachVip()
{
int tong =0;
for (KhachHang kh:dsKhachHang)
{
if(kh.laVip)tong++;
}
return tong;
}
}
Code hàm MainActivity
package com.example.macbookpro.dtsondctinhtienbansach;
import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageButton;
public class MainActivity extends AppCompatActivity {
Button btnThanhTien, btnTiep, btnThongKe;
EditText edtTenKh,edtSoLuongSach, edtTongKh,edtThanhTien, edtTongVip,edtTongDoanhThu;
CheckBox chkVip;
ImageButton imgThoat;
DanhSachKhachHang dsKh = new DanhSachKhachHang();
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addControls();
addEvents();
}
// Ham nay de anh xa cac control ngoai man hinh vao bien trong bo nho chinh private void addControls() {
btnThanhTien = (Button) findViewById(R.id.btntinhtt);
btnTiep = (Button) findViewById(R.id.btntiep);
btnThongKe= (Button) findViewById(R.id.btnthongke);
edtTenKh = (EditText) findViewById(R.id.editTextTenKhachHang);
edtSoLuongSach = (EditText) findViewById(R.id.editTextSoLuongSach);
edtThanhTien = (EditText) findViewById(R.id.editTextThanhTien);
edtTongKh = (EditText) findViewById(R.id.editTextTongKhachHang);
edtTongVip = (EditText) findViewById(R.id.editTextTongKhachVip);
edtTongDoanhThu = (EditText) findViewById(R.id.editTextTongDoanhThu);
chkVip = (CheckBox) findViewById(R.id.checkBoxVip);
imgThoat = (ImageButton) findViewById(R.id.imageButtonThoat);
}
// Goi cac xu ly da thiet lap ben duoi private void addEvents() {
btnThongKe.setOnClickListener(new myEvent());
btnTiep.setOnClickListener(new myEvent());
btnThanhTien.setOnClickListener(new myEvent());
imgThoat.setOnClickListener(new myEvent());
}
// Bat cac id cua control ngoai man hinh, tuy vao id ma co cac xu ly khac nhau // Ke thua interface View.OnClickListener va override method onClick private class myEvent implements View.OnClickListener
{
@Override public void onClick(View v) {
switch (v.getId()){
case R.id.btntinhtt:
tinhTien();
break;
case R.id.btntiep:
tiep();
break;
case R.id.btnthongke:
thongKe();
break;
case R.id.imageButtonThoat:
thoat();
break;
}
}
}
// Viet ham Button tinh tien private void tinhTien(){
KhachHang kh = new KhachHang();
kh.setTenKh(edtTenKh.getText()+"");
kh.setSlMua(Integer.parseInt(edtSoLuongSach.getText()+""));
kh.setLaVip(chkVip.isChecked());
// cap nhap khach hang moi vao dsKhachHang phuc vu cho cong viec thong ke dsKh.themKh(kh);
edtThanhTien.setText(kh.tinhThanhTien()+"");
}
// Viet ham Button tiep private void tiep()
{
// reset cac editText cua muc ban hang ve rong edtTenKh.setText("");
edtThanhTien.setText("");
edtSoLuongSach.setText("");
// focus vao editText ho ten edtTenKh.requestFocus();
}
// viet ham cho Button Thong ke private void thongKe()
{
// goi ham trong class DanhSachKhachHang de set gia tri cho cac editText trong muc thong ke edtTongKh.setText(dsKh.tongKhachHang()+"");
edtTongVip.setText(dsKh.tongKhachVip()+"");
edtTongDoanhThu.setText(dsKh.tongDoanhThu()+"");
}
//Viet ham khi click vao imageButton Thoat private void thoat()
{
AlertDialog.Builder bd = new AlertDialog.Builder(this);
// set Title cho Alert bd.setTitle("Thoat chuong trinh");
// set message cho Alert bd.setMessage("Ban co muon thoat khong?");
// Tao button va set su kien cho button tren alert bd.setNegativeButton("Khong", new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
bd.setPositiveButton("Co", new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
finish();
}
});
bd.create().show();
}
}
Code xml giao diện
<?xml version="1.0" encoding="utf-8"?><ScrollView 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" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.macbookpro.dtsondctinhtienbansach.MainActivity" android:fillViewport="false">
<LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent">
<TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceLarge" android:text="Chuong trinh tinh tien ban hang" android:id="@+id/textView" android:textColor="#FFFFFF" android:background="#FF0000" android:layout_gravity="center_horizontal" />
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceLarge" android:text="Ban hang:" android:textColor="#FFFFFF" android:background="#0008ff" android:id="@+id/textView2" />
<TableLayout android:layout_width="match_parent" android:orientation="horizontal" android:layout_height="match_parent">
<TableRow android:layout_width="match_parent" android:layout_height="match_parent">
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceMedium" android:text="Ten khac hang" android:id="@+id/textView3" />
<EditText android:layout_width="230dp" android:layout_height="wrap_content" android:id="@+id/editTextTenKhachHang" android:layout_column="13" />
</TableRow>
<TableRow android:layout_width="match_parent" android:layout_height="match_parent">
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceMedium" android:text="So luong sach" android:id="@+id/textView4" />
<EditText android:layout_width="230dp" android:layout_height="wrap_content" android:id="@+id/editTextSoLuongSach" android:layout_column="13" />
</TableRow>
<CheckBox android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Khach vip" android:id="@+id/checkBoxVip" android:checked="false" />
<TableRow android:layout_width="match_parent" android:layout_height="match_parent">
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceMedium" android:text="Thanh tien" android:id="@+id/txtThanhTien" />
<EditText android:layout_width="230dp" android:layout_height="wrap_content" android:id="@+id/editTextThanhTien" android:layout_column="13" />
</TableRow>
</TableLayout>
<LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" >
<Button android:id="@+id/btntinhtt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="Tính TT" />
<Button android:id="@+id/btntiep" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="Tiếp" />
<Button android:id="@+id/btnthongke" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="Thống kê" />
</LinearLayout>
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceLarge" android:text="Thong ke:" android:textColor="#FFFFFF" android:background="#000dff" android:id="@+id/textView10" />
<TableLayout android:layout_width="match_parent" android:orientation="horizontal" android:layout_height="match_parent">
<TableRow android:layout_width="match_parent" android:layout_height="match_parent">
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceMedium" android:text="Tong khach hang" android:id="@+id/textView6" />
<EditText android:layout_width="150dp" android:layout_height="wrap_content" android:id="@+id/editTextTongKhachHang" android:layout_column="13" />
</TableRow>
<TableRow android:layout_width="match_parent" android:layout_height="match_parent">
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceMedium" android:text="Tong khach VIP" android:id="@+id/textView7" />
<EditText android:layout_width="230dp" android:layout_height="wrap_content" android:id="@+id/editTextTongKhachVip" android:layout_column="13" />
</TableRow>
<TableRow android:layout_width="match_parent" android:layout_height="match_parent">
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceMedium" android:text="Tong doanh thu" android:id="@+id/textView8" />
<EditText android:layout_width="230dp" android:layout_height="wrap_content" android:id="@+id/editTextTongDoanhThu" android:layout_column="13" />
</TableRow>
</TableLayout>
<ImageButton android:layout_width="69dp" android:layout_height="67dp" android:layout_gravity="right" android:id="@+id/imageButtonThoat" android:src="@drawable/exit" />
</LinearLayout>
</ScrollView>
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