up

app/src/main/java/io/legado/app/data/dao/RssArticleDao.kt

@@ -16,6 +16,9 @@ interface RssArticleDao {
     @Insert(onConflict = OnConflictStrategy.IGNORE)
     fun insert(vararg rssArticle: RssArticle)
 
+    @Query("delete from rssArticles where origin = :origin and `order` < :order")
+    fun clearOld(origin: String, order: Long)
+
     @Update
     fun update(vararg rssArticle: RssArticle)
 

app/src/main/java/io/legado/app/model/Rss.kt

@@ -15,12 +15,12 @@ object Rss {
 
     fun getArticles(
         rssSource: RssSource,
-        page: Int,
+        pageUrl: String? = null,
         scope: CoroutineScope = Coroutine.DEFAULT,
         context: CoroutineContext = Dispatchers.IO
     ): Coroutine<MutableList<RssArticle>> {
         return Coroutine.async(scope, context) {
-            val analyzeUrl = AnalyzeUrl(rssSource.sourceUrl, page = page)
+            val analyzeUrl = AnalyzeUrl(pageUrl ?: rssSource.sourceUrl)
             val body = analyzeUrl.getResponseAwait(rssSource.sourceUrl).body
             RssParserByRule.parseXML(body, rssSource)
         }

app/src/main/java/io/legado/app/ui/rss/article/RssArticlesActivity.kt

@@ -4,10 +4,12 @@ import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
 import androidx.core.content.ContextCompat
+import androidx.lifecycle.LiveData
 import androidx.lifecycle.Observer
 import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
+import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.data.entities.RssArticle
@@ -32,6 +34,7 @@ class RssArticlesActivity : VMBaseActivity<RssArticlesViewModel>(R.layout.activi
     override lateinit var adapter: RssArticlesAdapter
     private val editSource = 12319
     private lateinit var loadMoreView: LoadMoreView
+    private var rssArticlesData: LiveData<List<RssArticle>>? = null
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         viewModel.callBack = this
@@ -40,6 +43,7 @@ class RssArticlesActivity : VMBaseActivity<RssArticlesViewModel>(R.layout.activi
         })
         initView()
         viewModel.initData(intent) {
+            initData()
             refresh_recycler_view.startLoading()
         }
     }
@@ -92,6 +96,16 @@ class RssArticlesActivity : VMBaseActivity<RssArticlesViewModel>(R.layout.activi
         })
     }
 
+    private fun initData() {
+        viewModel.url?.let {
+            rssArticlesData?.removeObservers(this)
+            rssArticlesData = App.db.rssArticleDao().liveByOrigin(it)
+            rssArticlesData?.observe(this, Observer { list ->
+                adapter.setItems(list)
+            })
+        }
+    }
+
     private fun scrollToBottom() {
         if (viewModel.isLoading) return
         if (loadMoreView.hasMore && adapter.getActualItemCount() > 0) {

app/src/main/java/io/legado/app/ui/rss/article/RssArticlesViewModel.kt

@@ -8,6 +8,7 @@ import io.legado.app.base.BaseViewModel
 import io.legado.app.data.entities.RssArticle
 import io.legado.app.data.entities.RssSource
 import io.legado.app.model.Rss
+import kotlinx.coroutines.Dispatchers.IO
 
 
 class RssArticlesViewModel(application: Application) : BaseViewModel(application) {
@@ -15,10 +16,8 @@ class RssArticlesViewModel(application: Application) : BaseViewModel(application
     var url: String? = null
     var rssSource: RssSource? = null
     val titleLiveData = MutableLiveData<String>()
-    private val articles = linkedSetOf<RssArticle>()
     var isLoading = true
-    var page = 1
-    var hasMore = true
+    var order = System.currentTimeMillis()
 
     fun initData(intent: Intent, finally: () -> Unit) {
         execute {
@@ -39,17 +38,16 @@ class RssArticlesViewModel(application: Application) : BaseViewModel(application
     fun loadContent() {
         isLoading = true
         rssSource?.let { rssSource ->
-            Rss.getArticles(rssSource, page, this)
-                .onSuccess {
+            Rss.getArticles(rssSource, null)
+                .onSuccess(IO) {
                     it?.let {
-                        val oldSize = articles.size
-                        articles.addAll(it)
-                        if (articles.size == oldSize) {
-                            hasMore = false
-                        } else {
-                            callBack?.adapter?.setItems(articles.toList())
-                        }
-                        page++
+                        it.forEach { rssArticle ->
+                            rssArticle.order = order--
+                        }
+                        App.db.rssArticleDao().insert(*it.toTypedArray())
+                        if (!rssSource.ruleNextPage.isNullOrEmpty()) {
+                            App.db.rssArticleDao().clearOld(url!!, order)
+                        }
                         isLoading = false
                     }
                 }.onError {
@@ -66,10 +64,15 @@ class RssArticlesViewModel(application: Application) : BaseViewModel(application
     }
 
     fun clear() {
-        page = 1
-        articles.clear()
+        execute {
+            url?.let {
+                App.db.rssArticleDao().delete(it)
+            }
+            order = System.currentTimeMillis()
+        }.onSuccess {
             loadContent()
         }
+    }
 
     interface CallBack {
         var adapter: RssArticlesAdapter