设计思想：
首先利用python爬取疫情情况，然后用Android studio制作可视化界面。
爬取代码：
from os import path
import request
from bs4 import BeautifulSoup
import json
import pymysql
import numpy as np
import time
import requests
url = 'https://ncov.dxy.cn/ncovh5/view/pneumonia?from=timeline&isappinstalled=0' # 请求地址
headers = {
'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36'} # 创建头部信息
response = requests.get(url, headers=headers) # 发送网络请求
content = response.content.decode('utf-8')
soup = BeautifulSoup(content, 'html.parser')
listA = soup.find_all(name='script', attrs={"id": "getAreaStat"})
# 世界确诊
listB = soup.find_all(name='script', attrs={"id": "getListByCountryTypeService2"})
account = str(listA)
messages = account[52:-21]
messages_json = json.loads(messages)
valuesList = []
cityList = []
con = len(messages_json)
k = 0
for i in range(len(messages_json)):
k = k + 1
value = (
k, time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())), messages_json[i].get('provinceShortName'), None,
messages_json[i].get('confirmedCount'), messages_json[i].get('suspectedCount'), messages_json[i].get('curedCount'),
messages_json[i].get('deadCount'), messages_json[i].get('locationId'))
valuesList.append(value)
cityValue = messages_json[i].get('cities')
for j in range(len(cityValue)):
con = con + 1
cityValueList = (
con, time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())), messages_json[i].get('provinceShortName'),
cityValue[j].get('cityName'), cityValue[j].get('confirmedCount'), cityValue[j].get('suspectedCount'),
cityValue[j].get('curedCount'), cityValue[j].get('deadCount'), cityValue[j].get('locationId'))
cityList.append(cityValueList)
db = pymysql.connect("localhost", "root", "123456", "yiqing1", charset='utf8')
cursor = db.cursor()
array = np.asarray(valuesList[0])
sql_clean_province = "TRUNCATE TABLE info3"
sql = "INSERT INTO info3 values (%s,%s,%s,%s,%s,%s,%s,%s,%s) "
cityTuple = tuple(cityList)
try:
cursor.execute(sql_clean_province)
db.commit()
except:
print('执行失败，进入回调1')
db.rollback()
try:
cursor.executemany(sql, value_tuple)
db.commit()
except:
print('执行失败，进入回调3')
db.rollback()
try:
cursor.executemany(sql, cityTuple)
db.commit()
except:
print('执行失败，进入回调4')
db.rollback()
db.close()
截图：
Android studio代码：
package com.example.application;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.app.AppCompatActivity;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.icu.lang.UCharacter;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private Button bt_send;
private EditText et_content;
private static final int TEST_USER_SELECT = 1;
private String content;
private Spinner conditionSpinner;
private String condition;
private ListView lv;
String[] strs = new String[]{};
@SuppressLint("HandlerLeak")
private Handler mHandler = new Handler(){
@Override
public void handleMessage(Message msg){
switch(msg.what){
case TEST_USER_SELECT:
String s = (String)msg.obj;
strs = s.split(" ");
lv.setAdapter(new ArrayAdapter<String>(MainActivity.this,R.layout.support_simple_spinner_dropdown_item,strs));
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt_send = findViewById(R.id.bt_send);
et_content = findViewById(R.id.et_content);
et_content.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
content = s.toString();
}
});
conditionSpinner = findViewById(R.id.condition);
final String [] data = {"国家","时间"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.support_simple_spinner_dropdown_item,data);
conditionSpinner.setAdapter(adapter);
conditionSpinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
//取得选中的值
condition = data[position];
//设置显示当前选择的项
parent.setVisibility(View.VISIBLE);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
System.out.println(condition);
lv = findViewById(R.id.lv);
}
@Override
protected void onStart(){
super.onStart();
bt_send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//执行查询操作
//连接数据库进行操作需要在主线程操作
new Thread(new Runnable() {
@Override
public void run() {
//调用数据库帮助类中的方法取数据
List<Data> list = DB.searchDataByCountry(condition,content);
Message message = mHandler.obtainMessage();
String s = "";
for(int i=0;i<list.size();i++){
s += "时间:"+list.get(i).getLastUpdateTime()+" ";
s += list.get(i).getCountryname()+"确诊人数为: ";
s += list.get(i).getConfirmed()+" ";
}
message.what = TEST_USER_SELECT;
message.obj = s;
mHandler.sendMessage(message);
}
}).start();
}
});
}
}
package com.example.application;
public class Data {
private int id;
private String countryname;
private String confirmed;
private String suspected;
private String dead;
private String healed;
private String lastUpdateTime;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCountryname() {
return countryname;
}
public void setCountryname(String countryname) {
this.countryname = countryname;
}
public String getConfirmed() {
return confirmed;
}
public void setConfirmed(String confirmed) {
this.confirmed = confirmed;
}
public String getSuspected() {
return suspected;
}
public void setSuspected(String suspected) {
this.suspected = suspected;
}
public String getDead() {
return dead;
}
public void setDead(String dead) {
this.dead = dead;
}
public String getHealed() {
return healed;
}
public void setHealed(String healed) {
this.healed = healed;
}
public String getLastUpdateTime() {
return lastUpdateTime;
}
public void setLastUpdateTime(String lastUpdateTime) {
this.lastUpdateTime = lastUpdateTime;
}
}
package com.example.application;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class DB {
private static String driver = "com.mysql.jdbc.Driver";
private static String url = "jdbc:mysql://192.168.0.104:3306/yiqing1?characterEncoding=utf-8";
private static String user = "root";//用户名
private static String password = "123456";//密码
public static Connection getConn(){
Connection conn = null;
try {
Class.forName(driver);
conn = (Connection) DriverManager.getConnection(url,user,password);//获取连接
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
public static List<Data> searchDataByCountry(String condition,String country_name){
List<Data> list = new ArrayList<>();
Connection connection = getConn();
String sql = "";
//System.out.println(condition);
if(condition.equals("国家")){
sql = "select * from worlddata where countryname like ?";
}
if(condition.equals("时间")){
sql = "select * from worlddata where lastUpdateTime like ?";
}
System.out.println(country_name);
if(connection !=null){
try {
PreparedStatement ps = connection.prepareStatement(sql);
if(ps!=null){
ps.setString(1,"%"+country_name+"%");
ResultSet rs = ps.executeQuery();
if(rs!=null){
while(rs.next()){
Data data = new Data();
data.setId(rs.getInt("id"));
data.setCountryname(rs.getString("countryname"));
data.setConfirmed(rs.getString("confirmed"));
data.setSuspected(rs.getString("suspected"));
data.setDead(rs.getString("dead"));
data.setHealed(rs.getString("healed"));
data.setLastUpdateTime(rs.getString("lastUpdateTime"));
list.add(data);
}
connection.close();
ps.close();
return list;
}else{
return null;
}
}else{
return null;
}
} catch (SQLException e) {
e.printStackTrace();
return null;
}
}else{
return null;
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<Spinner
android:id="@+id/condition"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<EditText
android:id="@+id/et_content"
android:layout_width="180dp"
android:layout_height="40dp"
android:layout_toRightOf="@+id/condition"
/>
<Button
android:id="@+id/bt_send"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="查询"
android:layout_toRightOf="@+id/et_content"
/>
<ListView
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="50dp"
/>
</RelativeLayout>