Improve code

Signed-off-by: Geoffrey Métais <geoffrey.metais@gmail.com>

vlc-android/src/org/videolan/vlc/gui/network/MRLPanelFragment.kt

@@ -106,9 +106,7 @@ class MRLPanelFragment : DialogFragment(), View.OnKeyListener, TextView.OnEditor
         dismiss()
     }
 
-    override fun onEditorAction(v: TextView, actionId: Int, event: KeyEvent): Boolean {
-        return false
-    }
+    override fun onEditorAction(v: TextView, actionId: Int, event: KeyEvent) = false
 
     override fun onClick(v: View) {
         processUri()
@@ -116,9 +114,7 @@ class MRLPanelFragment : DialogFragment(), View.OnKeyListener, TextView.OnEditor
 
     override fun onDestroy() {
         super.onDestroy()
-        val activity = activity
         // TV
         (activity as? DialogActivity)?.finish()
     }
-
 }

vlc-android/src/org/videolan/vlc/viewmodels/MRLPanelModel.kt

@@ -22,17 +22,13 @@ package org.videolan.vlc.viewmodels
 
 import android.arch.lifecycle.MutableLiveData
 import android.arch.lifecycle.ViewModel
-import android.databinding.BaseObservable
-import android.databinding.ObservableArrayList
 import android.databinding.ObservableField
 import android.text.Editable
-import android.text.TextWatcher
-import android.util.Log
-import kotlinx.coroutines.experimental.android.UI
-import kotlinx.coroutines.experimental.launch
+import kotlinx.coroutines.experimental.withContext
 import org.videolan.medialibrary.media.MediaWrapper
 import org.videolan.vlc.VLCApplication
 import org.videolan.vlc.util.VLCIO
+import org.videolan.vlc.util.uiJob
 
 
 class MRLPanelModel: ViewModel() {
@@ -44,13 +40,8 @@ class MRLPanelModel: ViewModel() {
 
      val observableHistory = MutableLiveData<Array<MediaWrapper>>()
 
-     fun updateHistory() {
-          launch(VLCIO) {
-               val history = VLCApplication.getMLInstance().lastStreamsPlayed()
-               launch(UI) {
-                   observableHistory.value = history
-               }
-          }
-     }
-
+    fun updateHistory() = uiJob {
+        val history = withContext(VLCIO) { VLCApplication.getMLInstance().lastStreamsPlayed() }
+        observableHistory.value = history
+    }
 }
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