improve autoplay next episode

* add animations to show/hide next episode button
* add option to disable/enable autoplay

app/src/main/java/org/mosad/teapod/PlayerActivity.kt

@@ -1,5 +1,7 @@
 package org.mosad.teapod
 
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
 import android.annotation.SuppressLint
 import android.net.Uri
 import android.os.Build
@@ -28,6 +30,7 @@ import org.mosad.teapod.util.Episode
 import org.mosad.teapod.util.Media
 import java.util.concurrent.TimeUnit
 
+
 class PlayerActivity : AppCompatActivity() {
 
     private lateinit var player: SimpleExoPlayer
@@ -157,7 +160,7 @@ class PlayerActivity : AppCompatActivity() {
                     else -> View.VISIBLE
                 }
 
-                if (state == ExoPlayer.STATE_ENDED && nextEpisode != null) {
+                if (state == ExoPlayer.STATE_ENDED && nextEpisode != null && Preferences.autoplay) {
                     playNextEpisode()
                 }
 
@@ -219,8 +222,14 @@ class PlayerActivity : AppCompatActivity() {
             if (remainingTime in 0..20000) {
                 withContext(Dispatchers.Main) {
                     // if the next ep button is not visible, make it visible
-                    if (!button_next_ep.isVisible && nextEpisode != null) {
-                        button_next_ep.visibility = View.VISIBLE // TODO animation
+                    if (!button_next_ep.isVisible && nextEpisode != null && Preferences.autoplay) {
+                        showButtonNextEp()
+                    }
+                }
+            } else {
+                withContext(Dispatchers.Main) {
+                    if (button_next_ep.isVisible) {
+                        hideButtonNextEp()
                     }
                 }
             }
@@ -253,7 +262,7 @@ class PlayerActivity : AppCompatActivity() {
 
             // update the gui
             exo_text_title.text = nextEp.title
-            button_next_ep.visibility = View.GONE // TODO animation
+            hideButtonNextEp()
 
             player.clearMediaItems() //remove previous item
             val mediaSource = HlsMediaSource.Factory(dataSourceFactory)
@@ -316,6 +325,36 @@ class PlayerActivity : AppCompatActivity() {
         }
     }
 
+    /**
+     * show the next episode button
+     * TODO improve the show animation
+     */
+    private fun showButtonNextEp() {
+        button_next_ep.visibility = View.VISIBLE
+        button_next_ep.alpha = 0.0f
+
+        button_next_ep.animate()
+            .alpha(1.0f)
+            .setListener(null)
+    }
+
+    /**
+     * hide the next episode button
+     * TODO improve the hide animation
+     */
+    private fun hideButtonNextEp() {
+        button_next_ep.animate()
+            .alpha(0.0f)
+            .setListener(object : AnimatorListenerAdapter() {
+            override fun onAnimationEnd(animation: Animator?) {
+                super.onAnimationEnd(animation)
+                button_next_ep.visibility = View.GONE
+            }
+        })
+
+    }
+
+
     inner class PlayerGestureListener : GestureDetector.SimpleOnGestureListener() {
 
         /**

app/src/main/java/org/mosad/teapod/preferences/Preferences.kt

@@ -7,6 +7,8 @@ object Preferences {
 
     var preferSecondary = false
         internal set
+    var autoplay = true
+        internal set
 
     fun savePreferSecondary(context: Context, preferSecondary: Boolean) {
         val sharedPref = context.getSharedPreferences(
@@ -22,6 +24,20 @@ object Preferences {
         this.preferSecondary = preferSecondary
     }
 
+    fun saveAutoplay(context: Context, autoplay: Boolean) {
+        val sharedPref = context.getSharedPreferences(
+            context.getString(R.string.preference_file_key),
+            Context.MODE_PRIVATE
+        )
+
+        with(sharedPref.edit()) {
+            putBoolean(context.getString(R.string.save_key_autoplay), autoplay)
+            apply()
+        }
+
+        this.autoplay = autoplay
+    }
+
     /**
      * initially load the stored values
      */
@@ -34,6 +50,9 @@ object Preferences {
         preferSecondary = sharedPref.getBoolean(
             context.getString(R.string.save_key_prefer_secondary), false
         )
+        autoplay = sharedPref.getBoolean(
+            context.getString(R.string.save_key_autoplay), true
+        )
     }
 
 

app/src/main/java/org/mosad/teapod/ui/fragments/AccountFragment.kt

@@ -28,6 +28,7 @@ class AccountFragment : Fragment() {
         text_account_login.text = EncryptedPreferences.login
         text_info_about_desc.text = getString(R.string.info_about_desc, BuildConfig.VERSION_NAME, getString(R.string.build_time))
         switch_secondary.isChecked = Preferences.preferSecondary
+        switch_autoplay.isChecked = Preferences.autoplay
 
         initActions()
     }
@@ -57,6 +58,10 @@ class AccountFragment : Fragment() {
         switch_secondary.setOnClickListener {
             Preferences.savePreferSecondary(requireContext(), switch_secondary.isChecked)
         }
+
+        switch_autoplay.setOnClickListener {
+            Preferences.saveAutoplay(requireContext(), switch_autoplay.isChecked)
+        }
     }
 
     private fun showLoginDialog(firstTry: Boolean) {

app/src/main/java/org/mosad/teapod/ui/fragments/LibraryFragment.kt

@@ -6,12 +6,15 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import kotlinx.android.synthetic.main.fragment_library.*
-import kotlinx.coroutines.*
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import org.mosad.teapod.MainActivity
 import org.mosad.teapod.R
 import org.mosad.teapod.parser.AoDParser
-import org.mosad.teapod.util.decoration.MediaItemDecoration
 import org.mosad.teapod.util.adapter.MediaItemAdapter
+import org.mosad.teapod.util.decoration.MediaItemDecoration
 
 class LibraryFragment : Fragment() {