first commit

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

app/.gitignore

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+/build

app/build.gradle.kts

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+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "com.uynaity.ezcc2"
+    compileSdk = 33
+
+    defaultConfig {
+        applicationId = "com.uynaity.ezcc2"
+        minSdk = 26
+        targetSdk = 33
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+dependencies {
+
+    implementation("androidx.core:core-ktx:1.9.0")
+    implementation("androidx.appcompat:appcompat:1.6.1")
+    implementation("com.google.android.material:material:1.9.0")
+    implementation("androidx.constraintlayout:constraintlayout:2.1.4")
+    implementation("org.jsoup:jsoup:1.16.1")
+    testImplementation("junit:junit:4.13.2")
+    androidTestImplementation("androidx.test.ext:junit:1.1.5")
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/uynaity/ezcc2/ExampleInstrumentedTest.kt

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+package com.uynaity.ezcc2
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.uynaity.ezcc2", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.EZCC2"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/uynaity/ezcc2/MainActivity.kt

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+package com.uynaity.ezcc2
+
+import android.annotation.SuppressLint
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.widget.Button
+import android.widget.EditText
+import android.widget.TextView
+import android.widget.Toast
+import org.jsoup.Jsoup
+import java.net.HttpURLConnection
+import java.net.URL
+
+
+class MainActivity : AppCompatActivity() {
+    private lateinit var courseCodeEditText: EditText
+    private lateinit var searchButton: Button
+    private lateinit var sem1Stat: TextView
+    private lateinit var sem1Data: TextView
+    private lateinit var sem2Stat: TextView
+    private lateinit var sem2Data: TextView
+    private var backPressedTime: Long = 0
+    private val backPressedInterval = 2000
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        courseCodeEditText = findViewById(R.id.courseCode)
+        searchButton = findViewById(R.id.search)
+        sem1Stat = findViewById(R.id.sem1Stat)
+        sem1Data = findViewById(R.id.Sem1Data)
+        sem2Stat = findViewById(R.id.Sem2Stat)
+        sem2Data = findViewById(R.id.Sem2Data)
+        searchButton.setOnClickListener {
+            Thread {
+                try {
+                    getTableData(courseCodeEditText.text.toString())
+                } catch (e: Exception) {
+                    sem1Stat.text = e.message
+                }
+            }.start()
+        }
+    }
+
+    @Deprecated("Deprecated in Java")
+    override fun onBackPressed() {
+        if (System.currentTimeMillis() - backPressedTime < backPressedInterval) {
+            super.onBackPressed()
+            finishAffinity()
+        } else {
+            backPressedTime = System.currentTimeMillis()
+            Toast.makeText(this, "再次点击返回键退出", Toast.LENGTH_SHORT).show()
+        }
+    }
+
+    private fun getTableData(c: String?): MutableList<MutableList<Map<String, Any>>> {
+        if (c == "") {
+            runOnUiThread {
+                Toast.makeText(this, "请输入课程代码", Toast.LENGTH_SHORT).show()
+            }
+            return mutableListOf()
+        }
+        val upC = c?.uppercase()
+        val url = URL("https://sweb.hku.hk/ccacad/ccc_appl/enrol_stat.html")
+        val conn = url.openConnection() as HttpURLConnection
+        conn.requestMethod = "GET"
+        val responseCode = conn.responseCode
+        if (responseCode != 200) {
+            runOnUiThread {
+                sem1Stat.text = responseCode.toString()
+            }
+            return mutableListOf()
+        }
+
+        val doc = Jsoup.parse(url, 3000)
+        val table = doc.select("table").first()
+
+        val semList = mutableListOf(
+            mutableListOf<Map<String, Any>>(), mutableListOf()
+        )
+
+        var sem = 0
+
+        for (row in table?.select("tr")!!) {
+            val tds = row?.select("td")
+
+            if (tds?.size!! < 6) {
+                if (row.text() == "First Semester") {
+                    sem = 0
+                } else if (row.text() == "Second Semester") {
+                    sem = 1
+                }
+                continue
+            }
+
+            if (!tds[0].text().contains(upC!!)) {
+                continue
+            }
+
+            if (!tds[2].text().contains("X")) {
+                val data1 = tds[0].text()
+                val data2 = tds[4].text().toInt()
+                val data3 = tds[5].text().toInt()
+                var stat = ""
+
+                if (data2 > data3) {
+                    stat = "尚有余，可选\n"
+                } else if (data3 - data2 <= 3) {
+                    stat = "少量不足，可备选\n"
+                } else if (data3 - data2 > 3) {
+                    stat = "严重不足，建议更换\n"
+                }
+                val dataSet = mapOf(
+                    "课程代码" to data1,
+                    "空余数量" to data2,
+                    "等待批准" to data3,
+                    "选课建议" to stat
+                )
+                semList[sem].add(dataSet)
+            }
+        }
+        judgement(semList)
+        return semList
+    }
+
+
+    @SuppressLint("SetTextI18n")
+    private fun judgement(re: MutableList<MutableList<Map<String, Any>>>) {
+        val semList = mutableListOf(
+            sem1Data, sem2Data
+        )
+        val semStats = mutableListOf(
+            sem1Stat, sem2Stat
+        )
+        for (index in re.indices) {
+            val subList = re[index]
+            if (subList.isEmpty()) {
+                runOnUiThread {
+                    semStats[index].text = "未在Sem ${index + 1}中找到相关课程 :-("
+                }
+            } else {
+                runOnUiThread {
+                    semStats[index].text = "Sem ${index + 1}中找到以下相关课程:"
+                }
+            }
+            runOnUiThread {
+                semList[index].text = printSem(subList)
+            }
+        }
+    }
+
+    private fun printSem(sem: MutableList<Map<String, Any>>): String {
+        var str = ""
+        for (i in sem) {
+            for (j in i) {
+                str += "${j.key}: ${j.value}\n"
+            }
+        }
+        str += "\n"
+        return str
+    }
+
+}