diff --git a/.gitignore b/.gitignore
index 09b993d06..5f0e23e18 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,5 @@
 /build
 /captures
 .externalNativeBuild
+/release
+/tmp
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index f18c6026c..39534e263 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,13 +1,12 @@
 apply plugin: 'com.android.application'
-
 apply plugin: 'kotlin-android'
-
 apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-kapt'
 
 android {
     compileSdkVersion 28
     defaultConfig {
-        applicationId "io.legado.book"
+        applicationId "io.legado.app"
         minSdkVersion 21
         targetSdkVersion 28
         versionCode 1
@@ -24,12 +23,25 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation 'androidx.appcompat:appcompat:1.0.2'
+    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+
     implementation 'androidx.core:core-ktx:1.0.2'
+    implementation 'androidx.appcompat:appcompat:1.0.2'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
-    implementation 'com.google.android.material:material:1.0.0'
+
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.recyclerview:recyclerview:1.0.0'
+    implementation 'androidx.cardview:cardview:1.0.0'
+    implementation 'com.google.android.material:material:1.0.0'
+
+    implementation 'androidx.paging:paging-runtime:2.1.0'
+
+    def anko_version = '0.10.8'
+    implementation "org.jetbrains.anko:anko-sdk27:$anko_version"
+    implementation "org.jetbrains.anko:anko-sdk27-listeners:$anko_version"
+
+
+
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
diff --git a/app/src/main/java/io/legado/app/utils/ContextExtensions.kt b/app/src/main/java/io/legado/app/utils/ContextExtensions.kt
new file mode 100644
index 000000000..a94267fda
--- /dev/null
+++ b/app/src/main/java/io/legado/app/utils/ContextExtensions.kt
@@ -0,0 +1,42 @@
+package io.legado.app.utils
+
+import android.content.Context
+import androidx.core.content.edit
+import org.jetbrains.anko.connectivityManager
+import org.jetbrains.anko.defaultSharedPreferences
+
+fun Context.isOnline() = connectivityManager.activeNetworkInfo?.isConnected == true
+
+fun Context.getPrefBoolean(key: String, defValue: Boolean) =
+    defaultSharedPreferences.getBoolean(key, defValue)
+
+fun Context.putPrefBoolean(key: String, value: Boolean) =
+    defaultSharedPreferences.edit { putBoolean(key, value) }
+
+
+fun Context.getPrefInt(key: String, defValue: Int) =
+    defaultSharedPreferences.getInt(key, defValue)
+
+fun Context.putPrefInt(key: String, value: Int) =
+    defaultSharedPreferences.edit { putInt(key, value) }
+
+fun Context.getPrefLong(key: String, defValue: Long) =
+    defaultSharedPreferences.getLong(key, defValue)
+
+fun Context.putPrefLong(key: String, value: Long) =
+    defaultSharedPreferences.edit { putLong(key, value) }
+
+fun Context.getPrefString(key: String, defValue: String) =
+    defaultSharedPreferences.getString(key, defValue)
+
+fun Context.putPrefString(key: String, value: String) =
+    defaultSharedPreferences.edit { putString(key, value) }
+
+fun Context.getPrefStringSet(key: String, defValue: MutableSet<String>) =
+    defaultSharedPreferences.getStringSet(key, defValue)
+
+fun Context.putPrefStringSet(key: String, value: MutableSet<String>) =
+    defaultSharedPreferences.edit { putStringSet(key, value) }
+
+fun Context.removePref(key: String) =
+    defaultSharedPreferences.edit { remove(key) }