♻️ Decoupling fragments with LocalBroadcast for KeyDown events

app/src/main/java/de/markhaehnel/rbtv/rocketbeanstv/MainActivity.kt

@@ -1,13 +1,15 @@
 package de.markhaehnel.rbtv.rocketbeanstv
 
+import android.content.Intent
 import android.os.Bundle
 import android.view.KeyEvent
 import android.view.View
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
+import androidx.localbroadcastmanager.content.LocalBroadcastManager
 import dagger.android.DispatchingAndroidInjector
 import dagger.android.support.HasSupportFragmentInjector
-import de.markhaehnel.rbtv.rocketbeanstv.util.FragmentInterface
+import de.markhaehnel.rbtv.rocketbeanstv.util.Constants
 import javax.inject.Inject
 
 class MainActivity : AppCompatActivity(), HasSupportFragmentInjector {
@@ -24,13 +26,8 @@ class MainActivity : AppCompatActivity(), HasSupportFragmentInjector {
     }
 
     override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
-        val navHostFragment = supportFragmentManager.findFragmentById(R.id.navContainer)
-        val currentFragment = navHostFragment?.getChildFragmentManager()?.fragments?.get(0)
-        if (currentFragment is FragmentInterface){
-            val res = currentFragment.onKeyDown(keyCode, event)
-            if (res) return res;
-        }
-
+        val intent = Intent(Constants.BROADCAST_KEYDOWN).apply { putExtra(Constants.BROADCAST_KEYDOWN_KEY_CODE, keyCode) }
+        LocalBroadcastManager.getInstance(this).sendBroadcast(intent)
         return super.onKeyDown(keyCode, event)
     }
 

app/src/main/java/de/markhaehnel/rbtv/rocketbeanstv/ui/player/PlayerFragment.kt

@@ -1,5 +1,9 @@
 package de.markhaehnel.rbtv.rocketbeanstv.ui.player
 
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
 import android.os.Bundle
 import android.view.KeyEvent
 import android.view.LayoutInflater
@@ -12,6 +16,7 @@ import androidx.fragment.app.Fragment
 import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.ViewModelProviders
+import androidx.localbroadcastmanager.content.LocalBroadcastManager
 import de.markhaehnel.rbtv.rocketbeanstv.R
 import de.markhaehnel.rbtv.rocketbeanstv.binding.FragmentDataBindingComponent
 import de.markhaehnel.rbtv.rocketbeanstv.databinding.FragmentPlayerBinding
@@ -21,14 +26,14 @@ import de.markhaehnel.rbtv.rocketbeanstv.ui.common.RetryCallback
 import de.markhaehnel.rbtv.rocketbeanstv.ui.schedule.ScheduleFragment
 import de.markhaehnel.rbtv.rocketbeanstv.ui.serviceinfo.ServiceInfoFragment
 import de.markhaehnel.rbtv.rocketbeanstv.ui.serviceinfo.ServiceInfoFragmentInterface
-import de.markhaehnel.rbtv.rocketbeanstv.util.FragmentInterface
+import de.markhaehnel.rbtv.rocketbeanstv.util.Constants
 import de.markhaehnel.rbtv.rocketbeanstv.util.IntervalTask
 import de.markhaehnel.rbtv.rocketbeanstv.util.autoCleared
 import de.markhaehnel.rbtv.rocketbeanstv.util.highestBandwith
 import kotlinx.android.synthetic.main.fragment_player.*
 import javax.inject.Inject
 
-class PlayerFragment : Fragment(), Injectable, FragmentInterface, ServiceInfoFragmentInterface {
+class PlayerFragment : Fragment(), Injectable, ServiceInfoFragmentInterface {
     @Inject
     lateinit var viewModelFactory: ViewModelProvider.Factory
 
@@ -38,6 +43,20 @@ class PlayerFragment : Fragment(), Injectable, FragmentInterface, ServiceInfoFra
     private lateinit var playerViewModel: PlayerViewModel
     private lateinit var playStateObserver: IntervalTask
 
+    private val keyDownBroadcastReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context, intent: Intent) {
+            when(intent.getIntExtra(Constants.BROADCAST_KEYDOWN_KEY_CODE, 0)) {
+                KeyEvent.KEYCODE_DPAD_CENTER,
+                KeyEvent.KEYCODE_DPAD_UP,
+                KeyEvent.KEYCODE_DPAD_RIGHT,
+                KeyEvent.KEYCODE_DPAD_DOWN,
+                KeyEvent.KEYCODE_DPAD_LEFT -> {
+                    inflateServiceInfoFragment()
+                }
+            }
+        }
+    }
+
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         val dataBinding = DataBindingUtil.inflate<FragmentPlayerBinding>(
             inflater,
@@ -64,6 +83,10 @@ class PlayerFragment : Fragment(), Injectable, FragmentInterface, ServiceInfoFra
         binding.isChatVisible = playerViewModel.isChatVisible
         binding.isBuffering = playerViewModel.isBuffering
 
+        LocalBroadcastManager.getInstance(requireContext())
+            .registerReceiver(keyDownBroadcastReceiver, IntentFilter(Constants.BROADCAST_KEYDOWN))
+
+
         initObservers()
         initPlayer()
     }
@@ -78,19 +101,6 @@ class PlayerFragment : Fragment(), Injectable, FragmentInterface, ServiceInfoFra
         videoView.pause()
     }
 
-    override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
-        when(keyCode) {
-            KeyEvent.KEYCODE_DPAD_CENTER,
-            KeyEvent.KEYCODE_DPAD_UP,
-            KeyEvent.KEYCODE_DPAD_RIGHT,
-            KeyEvent.KEYCODE_DPAD_DOWN,
-            KeyEvent.KEYCODE_DPAD_LEFT -> {
-                return inflateServiceInfoFragment()
-            }
-        }
-        return false
-    }
-
     private fun inflateChat() {
         val fragmentTag = "tagFragmentChat"
 
@@ -124,9 +134,8 @@ class PlayerFragment : Fragment(), Injectable, FragmentInterface, ServiceInfoFra
         val fragmentTag = "tagFragmentServiceInfo"
 
         if (childFragmentManager.findFragmentByTag(fragmentTag) == null) {
-            val serviceInfoFragment = ServiceInfoFragment()
             childFragmentManager.beginTransaction().apply {
-                replace(R.id.serviceInfoContainer, serviceInfoFragment, fragmentTag)
+                replace(R.id.serviceInfoContainer, ServiceInfoFragment(), fragmentTag)
                 addToBackStack(null)
                 commit()
             }

app/src/main/java/de/markhaehnel/rbtv/rocketbeanstv/ui/serviceinfo/ServiceInfoFragment.kt

@@ -1,9 +1,12 @@
 package de.markhaehnel.rbtv.rocketbeanstv.ui.serviceinfo
 
+import android.animation.ObjectAnimator
 import android.os.Bundle
+import android.os.Handler
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.animation.DecelerateInterpolator
 import androidx.databinding.DataBindingComponent
 import androidx.databinding.DataBindingUtil
 import androidx.fragment.app.Fragment
@@ -20,9 +23,6 @@ import de.markhaehnel.rbtv.rocketbeanstv.ui.common.RetryCallback
 import de.markhaehnel.rbtv.rocketbeanstv.util.autoCleared
 import kotlinx.android.synthetic.main.fragment_service_info.*
 import javax.inject.Inject
-import android.animation.ObjectAnimator
-import android.view.animation.DecelerateInterpolator
-import androidx.navigation.fragment.findNavController
 import kotlin.math.roundToInt
 
 class ServiceInfoFragment : Fragment(), Injectable {
@@ -35,6 +35,8 @@ class ServiceInfoFragment : Fragment(), Injectable {
     var binding by autoCleared<FragmentServiceInfoBinding>()
 
     private lateinit var serviceInfoViewModel: ServiceInfoViewModel
+    private var autoCloseHandler = Handler()
+    private lateinit var autoCloseRunnable: Runnable
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         val dataBinding = DataBindingUtil.inflate<FragmentServiceInfoBinding>(
@@ -79,11 +81,16 @@ class ServiceInfoFragment : Fragment(), Injectable {
 
         binding.serviceInfo = serviceInfoViewModel.serviceInfo
 
-        initServiceInfo()
+        autoCloseRunnable = Runnable {
+            fragmentManager?.popBackStack()
+        }
 
+        initServiceInfo()
         serviceInfoScheduleButton.requestFocus()
     }
 
+
+
     fun initServiceInfo() {
         serviceInfoViewModel.serviceInfo.observe(viewLifecycleOwner, Observer { serviceInfo ->
             if (serviceInfo.data != null) {

app/src/main/java/de/markhaehnel/rbtv/rocketbeanstv/util/Constants.kt

@@ -0,0 +1,8 @@
+package de.markhaehnel.rbtv.rocketbeanstv.util
+
+class Constants {
+    companion object {
+        val BROADCAST_KEYDOWN = "BROADCAST_KEYDOWN"
+        val BROADCAST_KEYDOWN_KEY_CODE = "BROADCAST_KEYDOWN_KEY_CODE"
+    }
+}