diff --git a/app/build.gradle b/app/build.gradle
index 809d1e5..d8ea8c3 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -11,8 +11,8 @@ android {
         applicationId "com.lizongying.mytv"
         minSdk 23
         targetSdk 33
-        versionCode getVersionCode()
-        versionName getVersionName()
+        versionCode VersionCode()
+        versionName VersionName()
     }
 
     buildTypes {
@@ -32,7 +32,7 @@ android {
     }
 }
 
-static def getVersionCode() {
+static def VersionCode() {
     try {
         def process = 'git rev-list --count HEAD'.execute()
         process.waitFor()
@@ -42,7 +42,7 @@ static def getVersionCode() {
     }
 }
 
-static def getVersionName() {
+static def VersionName() {
     try {
         def process = 'git describe --tags --always'.execute()
         process.waitFor()
@@ -53,7 +53,6 @@ static def getVersionName() {
 }
 
 dependencies {
-
     implementation 'androidx.core:core-ktx:1.11.0-beta02'
     implementation 'androidx.leanback:leanback:1.0.0'
     implementation 'com.github.bumptech.glide:glide:4.11.0'
diff --git a/app/src/main/java/com/lizongying/mytv/CardPresenter.kt b/app/src/main/java/com/lizongying/mytv/CardPresenter.kt
index 1da252b..d4fce2f 100644
--- a/app/src/main/java/com/lizongying/mytv/CardPresenter.kt
+++ b/app/src/main/java/com/lizongying/mytv/CardPresenter.kt
@@ -2,7 +2,6 @@ package com.lizongying.mytv
 
 import android.graphics.Bitmap
 import android.media.MediaMetadataRetriever
-import android.util.Log
 import android.view.ContextThemeWrapper
 import android.view.ViewGroup
 import androidx.leanback.widget.ImageCardView
@@ -13,11 +12,6 @@ import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
-
-/**
- * A CardPresenter is used to generate Views and bind Objects to them on demand.
- * It contains an ImageCardView.
- */
 class CardPresenter(private val lifecycleScope: LifecycleCoroutineScope) : Presenter() {
 
     override fun onCreateViewHolder(parent: ViewGroup): ViewHolder {
@@ -91,9 +85,7 @@ class CardPresenter(private val lifecycleScope: LifecycleCoroutineScope) : Prese
 
     companion object {
         private const val TAG = "CardPresenter"
-
         private const val CARD_WIDTH = 313
-
         private const val CARD_HEIGHT = 176
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/lizongying/mytv/Info.kt b/app/src/main/java/com/lizongying/mytv/Info.kt
index 07f7d6c..d8d8141 100644
--- a/app/src/main/java/com/lizongying/mytv/Info.kt
+++ b/app/src/main/java/com/lizongying/mytv/Info.kt
@@ -2,7 +2,6 @@ package com.lizongying.mytv
 
 import java.io.Serializable
 
-
 data class Info(
     var rowPosition: Int = 0,
     var itemPosition: Int = 0,
diff --git a/app/src/main/java/com/lizongying/mytv/MainActivity.kt b/app/src/main/java/com/lizongying/mytv/MainActivity.kt
index b47a66a..346a7de 100644
--- a/app/src/main/java/com/lizongying/mytv/MainActivity.kt
+++ b/app/src/main/java/com/lizongying/mytv/MainActivity.kt
@@ -13,10 +13,6 @@ import android.widget.Toast
 import androidx.core.content.ContextCompat
 import androidx.fragment.app.FragmentActivity
 
-
-/**
- * Loads [MainFragment].
- */
 class MainActivity : FragmentActivity() {
 
     private val playbackFragment = PlaybackFragment()
diff --git a/app/src/main/java/com/lizongying/mytv/MainFragment.kt b/app/src/main/java/com/lizongying/mytv/MainFragment.kt
index b7c78a5..0eb24f5 100644
--- a/app/src/main/java/com/lizongying/mytv/MainFragment.kt
+++ b/app/src/main/java/com/lizongying/mytv/MainFragment.kt
@@ -18,9 +18,6 @@ import androidx.leanback.widget.Row
 import androidx.leanback.widget.RowPresenter
 import androidx.lifecycle.lifecycleScope
 
-/**
- * Loads a grid of cards with movies to browse.
- */
 class MainFragment : BrowseSupportFragment() {
 
     var itemPosition: Int = 0
diff --git a/app/src/main/java/com/lizongying/mytv/PlaybackFragment.kt b/app/src/main/java/com/lizongying/mytv/PlaybackFragment.kt
index 31cb0e0..2148d06 100644
--- a/app/src/main/java/com/lizongying/mytv/PlaybackFragment.kt
+++ b/app/src/main/java/com/lizongying/mytv/PlaybackFragment.kt
@@ -10,7 +10,6 @@ import androidx.leanback.media.PlaybackTransportControlGlue
 import androidx.leanback.widget.PlaybackControlsRow
 import java.io.IOException
 
-/** Handles video playback with media controls. */
 class PlaybackFragment : VideoSupportFragment() {
 
     private lateinit var mTransportControlGlue: PlaybackTransportControlGlue<MediaPlayerAdapter>
@@ -28,7 +27,6 @@ class PlaybackFragment : VideoSupportFragment() {
     }
 
     override fun showControlsOverlay(runAnimation: Boolean) {
-        // We will do nothing here, and thus controls will never be shown
     }
 
     fun play(tv: TV) {
diff --git a/app/src/main/java/com/lizongying/mytv/TV.kt b/app/src/main/java/com/lizongying/mytv/TV.kt
index 1fe2b6e..dd5da07 100644
--- a/app/src/main/java/com/lizongying/mytv/TV.kt
+++ b/app/src/main/java/com/lizongying/mytv/TV.kt
@@ -2,9 +2,6 @@ package com.lizongying.mytv
 
 import java.io.Serializable
 
-/**
- * Movie class represents video entity with title, description, image thumbs and video url.
- */
 data class TV(
     var id: Int = 0,
     var title: String? = null,