新增长按TABS设置为默认页功能

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

@@ -20,4 +20,5 @@ object Bus {
     const val SHOW_RSS = "showRss"
     const val WEB_SERVICE_STOP = "webServiceStop"
     const val UP_DOWNLOAD = "upDownload"
+    const val UP_TABS = "upTabs"
 }

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

@@ -14,6 +14,7 @@ object PreferKey {
     const val processText = "process_text"
     const val cleanCache = "cleanCache"
     const val lastGroup = "lastGroup"
+    const val saveTabPosition = "saveTabPosition"
     const val pageAnim = "pageAnim"
     const val readBookFont = "readBookFont"
     const val fontFolder = "fontFolder"

app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfFragment.kt

@@ -13,22 +13,23 @@ import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.VMBaseFragment
 import io.legado.app.constant.AppConst
+import io.legado.app.constant.Bus
 import io.legado.app.constant.PreferKey
+import io.legado.app.constant.PreferKey.saveTabPosition
 import io.legado.app.data.entities.BookGroup
 import io.legado.app.lib.dialogs.selector
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.ui.book.search.SearchActivity
 import io.legado.app.ui.download.DownloadActivity
-import io.legado.app.utils.getPrefBoolean
-import io.legado.app.utils.getViewModel
-import io.legado.app.utils.putPrefInt
-import io.legado.app.utils.startActivity
+import io.legado.app.utils.*
 import kotlinx.android.synthetic.main.fragment_bookshelf.*
 import kotlinx.android.synthetic.main.view_tab_layout.*
 import kotlinx.android.synthetic.main.view_title_bar.*
+import org.jetbrains.anko.sdk27.listeners.onLongClick
 import org.jetbrains.anko.startActivity
 
+
 class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_bookshelf),
     SearchView.OnQueryTextListener,
     GroupManageDialog.CallBack,
@@ -82,7 +83,16 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
         view_pager_bookshelf.adapter = BookshelfAdapter(this, this)
         TabLayoutMediator(tab_layout, view_pager_bookshelf) { tab, position ->
             tab.text = bookGroups[position].groupName
+            tab.view?.onLongClick {
+                tab.select()
+                putPrefInt(saveTabPosition, position)
+                toast("该分组<" + bookGroups[position].groupName + ">已成为默认页。")
+                true
+            }
         }.attach()
+        observeEvent<Int>(Bus.UP_TABS) {
+            tab_layout.getTabAt(it)?.select()
+        }
     }
 
     private fun initBookGroupData() {

app/src/main/java/io/legado/app/ui/main/bookshelf/books/BooksFragment.kt

@@ -24,6 +24,7 @@ import io.legado.app.ui.main.MainViewModel
 import io.legado.app.utils.getPrefInt
 import io.legado.app.utils.getViewModelOfActivity
 import io.legado.app.utils.observeEvent
+import io.legado.app.utils.postEvent
 import kotlinx.android.synthetic.main.fragment_books.*
 import org.jetbrains.anko.startActivity
 
@@ -56,6 +57,7 @@ class BooksFragment : BaseFragment(R.layout.fragment_books),
         observeEvent<String>(Bus.UP_BOOK) {
             booksAdapter.notification(it)
         }
+        postEvent(Bus.UP_TABS, getPrefInt(PreferKey.saveTabPosition, 0))
     }
 
     private fun initRecyclerView() {