up

app/src/main/java/io/legado/app/ui/bookinfo/BookInfoActivity.kt

@@ -166,8 +166,14 @@ class BookInfoActivity : VMBaseActivity<BookInfoViewModel>(R.layout.activity_boo
             }
         }
         tv_shelf.onClick {
-            viewModel.saveBook {
+            if (viewModel.inBookshelf) {
-                tv_shelf.text = getString(R.string.remove_from_bookshelf)
+                viewModel.delBook {
+                    tv_shelf.text = getString(R.string.add_to_shelf)
+                }
+            } else {
+                viewModel.saveBook {
+                    tv_shelf.text = getString(R.string.remove_from_bookshelf)
+                }
             }
         }
         tv_loading.onClick { }

app/src/main/java/io/legado/app/ui/bookinfo/BookInfoViewModel.kt

@@ -106,6 +106,17 @@ class BookInfoViewModel(application: Application) : BaseViewModel(application) {
             chapterListData.value?.let {
                 App.db.bookChapterDao().insert(*it.toTypedArray())
             }
+            inBookshelf = true
+        }.onSuccess {
+            success?.invoke()
+        }
+    }
+
+    fun delBook(success: (() -> Unit)?) {
+        execute {
+            bookData.value?.let {
+                App.db.bookDao().delete(it.bookUrl)
+            }
         }.onSuccess {
             success?.invoke()
         }