添加识别rss分组中的频道信息，在菜单中可以切换频道（与之前的sortUrls不冲突)

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

@@ -5,6 +5,7 @@ import android.content.Intent
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
+import android.view.SubMenu
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.FragmentStatePagerAdapter
@@ -17,6 +18,7 @@ import io.legado.app.utils.gone
 import io.legado.app.utils.visible
 import kotlinx.android.synthetic.main.activity_rss_artivles.*
 import org.jetbrains.anko.startActivityForResult
+import java.util.LinkedHashMap
 
 class RssSortActivity : VMBaseActivity<RssSortViewModel>(R.layout.activity_rss_artivles) {
 
@@ -25,6 +27,8 @@ class RssSortActivity : VMBaseActivity<RssSortViewModel>(R.layout.activity_rss_a
     private val editSource = 12319
     private val fragments = linkedMapOf<String, RssArticlesFragment>()
     private lateinit var adapter: TabFragmentPageAdapter
+    private val channels = LinkedHashMap<String, String>()
+    private var groupMenu: Menu? = null
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         adapter = TabFragmentPageAdapter(supportFragmentManager)
@@ -34,6 +38,7 @@ class RssSortActivity : VMBaseActivity<RssSortViewModel>(R.layout.activity_rss_a
             title_bar.title = it
         })
         viewModel.initData(intent) {
+            upChannelMenu()
             upFragments()
         }
     }
@@ -43,6 +48,12 @@ class RssSortActivity : VMBaseActivity<RssSortViewModel>(R.layout.activity_rss_a
         return super.onCompatCreateOptionsMenu(menu)
     }
 
+    override fun onPrepareOptionsMenu(menu: Menu?): Boolean {
+        groupMenu = menu
+        upChannelMenu()
+        return super.onPrepareOptionsMenu(menu)
+    }
+
     override fun onCompatOptionsItemSelected(item: MenuItem): Boolean {
         when (item.itemId) {
             R.id.menu_edit_source -> viewModel.rssSource?.sourceUrl?.let {
@@ -54,15 +65,44 @@ class RssSortActivity : VMBaseActivity<RssSortViewModel>(R.layout.activity_rss_a
                 }
             }
         }
+        if (item.groupId == R.id.source_channel) {
+            var key = item.title.toString();
+            var i = fragments.keys.indexOf(key)
+            if (i >= 0)
+                view_pager.currentItem = i
+        }
         return super.onCompatOptionsItemSelected(item)
     }
 
+    private fun upChannelMenu() {
+        // 加入频道列表
+        groupMenu?.removeGroup(R.id.source_channel)
+        var sourceChannel = viewModel.rssSource?.sourceGroup
+        channels.clear()
+        sourceChannel?.split("\n\n")?.forEach { c ->
+            val d = c.split("::")
+            if (d.size > 1) {
+                channels[d[0]] = d[1]
+                var item = groupMenu?.add(R.id.source_channel, Menu.NONE, Menu.NONE, d[0])
+                item?.isCheckable = true
+                var keys = fragments.keys
+                item?.isChecked = keys.indexOf(d[0]) == view_pager.currentItem
+            }
+        }
+    }
+
     private fun upFragments() {
         fragments.clear()
         viewModel.rssSource?.sortUrls()?.forEach {
             fragments[it.key] = RssArticlesFragment.create(it.key, it.value)
         }
-        if (fragments.size == 1) {
+        var sortUrlsSize = fragments.size
+        if (sortUrlsSize <= 1) {
+            channels?.forEach {
+                fragments[it.key] = RssArticlesFragment.create(it.key, it.value)
+            }
+        }
+        if (sortUrlsSize == 1) {
             tab_layout.gone()
         } else {
             tab_layout.visible()

app/src/main/res/menu/rss_articles.xml

@@ -12,4 +12,8 @@
         android:title="@string/clear"
         app:showAsAction="never" />
 
+    <group android:id="@+id/source_channel">
+
+    </group>
+
 </menu>