学期改为从服务器异步获取，减少日后维护和更新的频率

Author: flben233

app/build.gradle

@@ -10,8 +10,8 @@ android {
         applicationId "org.shirakawatyu.swust.handiswust"
         minSdk 26
         targetSdk 32
-        versionCode 3
-        versionName "紫微垣-天乙"
+        versionCode 5
+        versionName "紫微垣-玄戈"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -32,6 +32,8 @@ android {
 }
 
 dependencies {
+    implementation 'com.squareup.okhttp3:okhttp:4.10.0'
+    implementation 'com.squareup.okio:okio:3.2.0'
     implementation 'com.alibaba.fastjson2:fastjson2:2.0.16.android'
     implementation 'androidx.appcompat:appcompat:1.5.1'
     implementation 'com.google.android.material:material:1.7.0'

app/src/main/java/org/shirakawatyu/swust/MainActivity.java

@@ -19,6 +19,8 @@
 import androidx.appcompat.app.AppCompatActivity;
 import org.shirakawatyu.swust.widget.CourseWidget;
 
+import okio.Okio;
+
 public class MainActivity extends AppCompatActivity implements View.OnClickListener {
 
     private WebView webView;
@@ -133,7 +135,7 @@ public void onPageFinished(WebView view, String url) {
 
         public void setData() {
             // 设置版本号
-            webView.evaluateJavascript("window.localStorage.setItem('version', '0.35')", value -> {});
+            webView.evaluateJavascript("window.localStorage.setItem('version', '0.36')", value -> {});
             // 从本地缓存读取课程表
             webView.evaluateJavascript("window.localStorage.getItem('lessons')", value -> {
 //                Toast.makeText(mContext, value, Toast.LENGTH_SHORT).show();

app/src/main/java/org/shirakawatyu/swust/utils/DateUtils.java

@@ -1,16 +1,48 @@
 package org.shirakawatyu.swust.utils;
 
+import android.content.Context;
+import android.content.SharedPreferences;
+
+import androidx.annotation.NonNull;
+
+import com.alibaba.fastjson2.JSON;
+import com.alibaba.fastjson2.JSONObject;
+
+import java.io.IOException;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.TimeZone;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import okhttp3.Call;
+import okhttp3.Callback;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+
 
 public class DateUtils {
-    public static long START_DATE = DateUtils.getDate("2022-8-29");
 
-    public static String curWeek() {
-        long cur = (System.currentTimeMillis() - START_DATE) / (1000 * 60 * 60 * 24 * 7) + 1;
+    public static String curWeek(Context context) {
+        SharedPreferences week = context.getSharedPreferences("week", Context.MODE_PRIVATE);
+        new Thread(() -> {
+            OkHttpClient httpClient = new OkHttpClient();
+            Request request = new Request.Builder().url("https://swust.aliceblog.co/api/week").get().build();
+            try {
+                Response response = httpClient.newCall(request).execute();
+                if (response.isSuccessful()) {
+                    JSONObject jsonObject = JSON.parseObject(response.body().string());
+                    week.edit().putLong("startDate", jsonObject.getLong("startDate")).apply();
+                    week.edit().putInt("total", jsonObject.getIntValue("total")).apply();
+                }
+            }catch (Exception ignored) {}
+        }).start();
+        long cur = (System.currentTimeMillis() - week.getLong("startDate", DateUtils.getDate("2022-7-29"))) / (1000 * 60 * 60 * 24 * 7) + 1;
+        int total = week.getInt("total", 20);
+        if (cur > total) return Integer.toString(total);
         return Long.toString(cur);
     }
 

app/src/main/java/org/shirakawatyu/swust/widget/CourseWidget.java

@@ -52,7 +52,7 @@ static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
         }
         // 判断数据是否过期
         String cur = courses.getString("cur", "0").replace("\"", "");
-        String s = DateUtils.curWeek();
+        String s = DateUtils.curWeek(context);
         Log.d("broadcast => cur ", s);
         Log.d("broadcast => cur2 ", cur);
         if(!cur.equals(s)) {