feat: 优化代码

app/src/main/java/io/legado/app/constant/IntentAction.kt

@@ -17,4 +17,5 @@ object IntentAction {
     const val next = "next"
     const val moveTo = "moveTo"
     const val init = "init"
+    const val remove = "remove"
 }

app/src/main/java/io/legado/app/service/DownloadService.kt

@@ -58,6 +58,7 @@ class DownloadService : BaseService() {
                     intent.getIntExtra("start", 0),
                     intent.getIntExtra("end", 0)
                 )
+                IntentAction.remove -> removeDownload(intent.getStringExtra("bookUrl"))
                 IntentAction.stop -> stopDownload()
             }
         }
@@ -91,6 +92,11 @@ class DownloadService : BaseService() {
         }
     }
 
+    private fun removeDownload(bookUrl: String?) {
+        downloadMap.remove(bookUrl)
+        finalMap.remove(bookUrl)
+    }
+
     private fun download() {
         val task = Coroutine.async(this, context = searchPool) {
             downloadMap.forEach { entry ->
@@ -102,30 +108,37 @@ class DownloadService : BaseService() {
                     val webBook = WebBook(bookSource)
                     entry.value.forEach { chapter ->
                         if (!isActive) return@async
-                        if (!BookHelp.hasContent(book, chapter)) {
-                            webBook.getContent(book, chapter, scope = this, context = searchPool)
-                                .onStart {
-                                    notificationContent = chapter.title
-                                }
-                                .onSuccess(IO) { content ->
-                                    content?.let {
-                                        BookHelp.saveContent(book, chapter, content)
+                        if (downloadMap.containsKey(book.bookUrl)) {
+                            if (!BookHelp.hasContent(book, chapter)) {
+                                webBook.getContent(
+                                    book,
+                                    chapter,
+                                    scope = this,
+                                    context = searchPool
+                                )
+                                    .onStart {
+                                        notificationContent = chapter.title
+                                    }
+                                    .onSuccess(IO) { content ->
+                                        content?.let {
+                                            BookHelp.saveContent(book, chapter, content)
+                                        }
                                     }
-                                }
-                                .onFinally(IO) {
-                                    synchronized(this@DownloadService) {
-                                        val chapterMap =
-                                            finalMap[book.bookUrl]
-                                                ?: linkedSetOf<BookChapter>().apply {
-                                                    finalMap[book.bookUrl] = this
-                                                }
-                                        chapterMap.add(chapter)
-                                        if (chapterMap.size == entry.value.size) {
-                                            downloadMap.remove(book.bookUrl)
-                                            finalMap.remove(book.bookUrl)
+                                    .onFinally(IO) {
+                                        synchronized(this@DownloadService) {
+                                            val chapterMap =
+                                                finalMap[book.bookUrl]
+                                                    ?: linkedSetOf<BookChapter>().apply {
+                                                        finalMap[book.bookUrl] = this
+                                                    }
+                                            chapterMap.add(chapter)
+                                            if (chapterMap.size == entry.value.size) {
+                                                downloadMap.remove(book.bookUrl)
+                                                finalMap.remove(book.bookUrl)
+                                            }
                                         }
                                     }
-                                }
+                            }
                         }
                     }
                 }

app/src/main/java/io/legado/app/service/help/Download.kt

@@ -17,6 +17,14 @@ object Download {
         }
     }
 
+    fun remove(context: Context, bookUrl: String) {
+        Intent(context, DownloadService::class.java).let {
+            it.action = IntentAction.remove
+            it.putExtra("bookUrl", bookUrl)
+            context.startService(it)
+        }
+    }
+
     fun stop(context: Context) {
         Intent(context, DownloadService::class.java).let {
             it.action = IntentAction.stop

app/src/main/java/io/legado/app/ui/download/DownloadAdapter.kt

@@ -45,7 +45,11 @@ class DownloadAdapter(context: Context, private val callBack: CallBack) :
         holder.itemView.apply {
             iv_download.onClick {
                 getItem(holder.layoutPosition)?.let {
-                    Download.start(context, it.bookUrl, 0, it.totalChapterNum)
+                    if (downloadMap?.containsKey(it.bookUrl) == true) {
+                        Download.remove(context, it.bookUrl)
+                    } else {
+                        Download.start(context, it.bookUrl, 0, it.totalChapterNum)
+                    }
                 }
             }
             tv_export.onClick {