feat: 优化代码

app/build.gradle

@@ -115,7 +115,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
 
     //fireBase
-    implementation 'com.google.firebase:firebase-core:17.2.3'
+    implementation 'com.google.firebase:firebase-core:17.3.0'
     implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'
 
     //androidX

app/src/google/res/values/strings.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="app_name">阅读Pro</string>
+
+</resources>

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

@@ -49,6 +49,7 @@ object AppConst {
     val bookGroupAll = BookGroup(-1, App.INSTANCE.getString(R.string.all))
     val bookGroupLocal = BookGroup(-2, App.INSTANCE.getString(R.string.local))
     val bookGroupAudio = BookGroup(-3, App.INSTANCE.getString(R.string.audio))
+    val bookGroupNone = BookGroup(-4, App.INSTANCE.getString(R.string.no_group))
 
     const val notificationIdRead = 1144771
     const val notificationIdAudio = 1144772

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

@@ -18,6 +18,9 @@ interface BookDao {
     @Query("SELECT * FROM books WHERE origin = '${BookType.local}'")
     fun observeLocal(): LiveData<List<Book>>
 
+    @Query("SELECT * FROM books WHERE (`group` & (SELECT sum(groupId) FROM book_groups)) > 0")
+    fun observeNoneGroup(): LiveData<List<Book>>
+
     @Query("SELECT bookUrl FROM books WHERE origin = '${BookType.local}'")
     fun observeLocalUri(): LiveData<List<String>>