Remove "Flashing" overlay

Fix #3579, fix #3250

app/src/main/java/com/topjohnwu/magisk/arch/BaseUIFragment.kt

@@ -41,6 +41,11 @@ abstract class BaseUIFragment<VM : BaseViewModel, Binding : ViewDataBinding> :
         return binding.root
     }
 
+    override fun onStart() {
+        super.onStart()
+        activity.supportActionBar?.subtitle = null
+    }
+
     override fun onEventDispatched(event: ViewEvent) = when(event) {
         is ContextExecutor -> event(requireContext())
         is ActivityExecutor -> event(activity)

app/src/main/java/com/topjohnwu/magisk/di/ViewModelsModule.kt

@@ -29,6 +29,6 @@ val viewModelModules = module {
     viewModel { MainViewModel() }
 
     // Legacy
-    viewModel { (args: FlashFragmentArgs) -> FlashViewModel(args, get()) }
+    viewModel { (args: FlashFragmentArgs) -> FlashViewModel(args) }
     viewModel { SuRequestViewModel(get(), get(), get(SUTimeout), get()) }
 }

app/src/main/java/com/topjohnwu/magisk/ui/flash/FlashFragment.kt

@@ -32,6 +32,10 @@ class FlashFragment : BaseUIFragment<FlashViewModel, FragmentFlashMd2Binding>()
         super.onStart()
         setHasOptionsMenu(true)
         activity.setTitle(R.string.flash_screen_title)
+
+        viewModel.subtitle.observe(this) {
+            activity.supportActionBar?.setSubtitle(it)
+        }
     }
 
     override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {

app/src/main/java/com/topjohnwu/magisk/ui/flash/FlashViewModel.kt

@@ -1,9 +1,10 @@
 package com.topjohnwu.magisk.ui.flash
 
-import android.content.res.Resources
 import android.net.Uri
 import android.view.MenuItem
 import androidx.databinding.Bindable
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.viewModelScope
 import com.topjohnwu.magisk.BR
 import com.topjohnwu.magisk.R
@@ -26,17 +27,15 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 
 class FlashViewModel(
-    args: FlashFragmentArgs,
-    private val resources: Resources
+    args: FlashFragmentArgs
 ) : BaseViewModel() {
 
     @get:Bindable
     var showReboot = Shell.rootAccess()
         set(value) = set(value, field, { field = it }, BR.showReboot)
 
-    @get:Bindable
-    var behaviorText = resources.getString(R.string.flashing)
-        set(value) = set(value, field, { field = it }, BR.behaviorText)
+    private val _subtitle = MutableLiveData(R.string.flashing)
+    val subtitle get() = _subtitle as LiveData<Int>
 
     val adapter = RvBindingAdapter<ConsoleItem>()
     val items = diffListOf<ConsoleItem>()
@@ -91,9 +90,9 @@ class FlashViewModel(
 
     private fun onResult(success: Boolean) {
         state = if (success) State.LOADED else State.LOADING_FAILED
-        behaviorText = when {
-            success -> resources.getString(R.string.done)
-            else -> resources.getString(R.string.failure)
+        when {
+            success -> _subtitle.postValue(R.string.done)
+            else -> _subtitle.postValue(R.string.failure)
         }
     }
 

app/src/main/res/layout/fragment_flash_md2.xml

@@ -56,29 +56,6 @@
             app:icon="@drawable/ic_restart"
             app:iconTint="?colorOnPrimary" />
 
-        <com.google.android.material.card.MaterialCardView
-            style="@style/WidgetFoundation.Card.Elevated"
-            goneUnless="@{viewModel.loading}"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center"
-            app:contentPadding="@dimen/l1">
-
-            <TextView
-                movieBehavior="@{viewModel.loading}"
-                movieBehaviorText="@{viewModel.behaviorText}"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_gravity="center"
-                android:fontFamily="monospace"
-                android:gravity="center"
-                android:textAppearance="@style/AppearanceFoundation.Body"
-                android:textColor="?colorOnSurface"
-                android:textStyle="bold"
-                tools:text="Flashing..." />
-
-        </com.google.android.material.card.MaterialCardView>
-
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
 </layout>