fix restart button focus on flash result

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

@@ -6,6 +6,7 @@ import android.content.pm.ActivityInfo
 import android.net.Uri
 import android.os.Bundle
 import android.view.*
+import androidx.core.view.isVisible
 import androidx.navigation.NavDeepLinkBuilder
 import com.topjohnwu.magisk.MainDirections
 import com.topjohnwu.magisk.R
@@ -37,6 +38,15 @@ class FlashFragment : BaseFragment<FragmentFlashMd2Binding>() {
         viewModel.subtitle.observe(this) {
             activity?.supportActionBar?.setSubtitle(it)
         }
+
+        viewModel.flashResult.observe(this) { success ->
+            binding.restartBtn.apply {
+                if (success && viewModel.showReboot) {
+                    if (!this.isVisible) this.show()
+                    if (!this.isFocused) this.requestFocus()
+                }
+            }
+        }
     }
 
     override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
@@ -66,7 +76,7 @@ class FlashFragment : BaseFragment<FragmentFlashMd2Binding>() {
     }
 
     override fun onKeyEvent(event: KeyEvent): Boolean {
-        return when(event.keyCode) {
+        return when (event.keyCode) {
             KeyEvent.KEYCODE_VOLUME_UP,
             KeyEvent.KEYCODE_VOLUME_DOWN -> true
             else -> false

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

@@ -34,6 +34,10 @@ class FlashViewModel : BaseViewModel() {
     private val _subtitle = MutableLiveData(R.string.flashing)
     val subtitle get() = _subtitle as LiveData<Int>
 
+    private val _flashResult = MutableLiveData<Boolean>()
+    val flashResult: LiveData<Boolean>
+        get() = _flashResult
+
     val items = diffListOf<ConsoleItem>()
     lateinit var args: FlashFragmentArgs
 
@@ -88,6 +92,7 @@ class FlashViewModel : BaseViewModel() {
             success -> _subtitle.postValue(R.string.done)
             else -> _subtitle.postValue(R.string.failure)
         }
+        _flashResult.value = success
     }
 
     fun onMenuItemClicked(item: MenuItem): Boolean {
@@ -100,7 +105,8 @@ class FlashViewModel : BaseViewModel() {
     private fun savePressed() = withExternalRW {
         viewModelScope.launch(Dispatchers.IO) {
             val name = "magisk_install_log_%s.log".format(
-                System.currentTimeMillis().toTime(timeFormatStandard))
+                System.currentTimeMillis().toTime(timeFormatStandard)
+            )
             val file = MediaStoreUtils.getFile(name, true)
             file.uri.outputStream().bufferedWriter().use { writer ->
                 synchronized(logItems) {

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

@@ -24,13 +24,13 @@
 
             <androidx.recyclerview.widget.RecyclerView
                 android:id="@+id/flash_content"
-                app:items="@{viewModel.items}"
                 scrollToLast="@{true}"
                 android:layout_width="wrap_content"
                 android:layout_height="match_parent"
                 android:clipToPadding="false"
                 android:orientation="vertical"
                 app:fitsSystemWindowsInsets="start|end|bottom"
+                app:items="@{viewModel.items}"
                 app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
                 app:layout_behavior="@string/appbar_scrolling_view_behavior"
                 tools:listitem="@layout/item_console_md2" />
@@ -38,27 +38,31 @@
         </HorizontalScrollView>
 
         <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
+            android:id="@+id/restart_btn"
             gone="@{!viewModel.loaded || !viewModel.showReboot}"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="bottom|end"
             android:layout_margin="@dimen/l1"
             android:layout_marginBottom="@dimen/l1"
+            android:clickable="@{!viewModel.loaded}"
+            android:enabled="@{viewModel.loaded}"
+            android:focusable="true"
             android:onClick="@{() -> viewModel.restartPressed()}"
             android:text="@string/reboot"
             android:textAllCaps="false"
             android:textColor="?colorOnPrimary"
             android:textStyle="bold"
-            app:layout_fitsSystemWindowsInsets="bottom"
             app:backgroundTint="?colorPrimary"
             app:icon="@drawable/ic_restart"
-            app:iconTint="?colorOnPrimary" />
+            app:iconTint="?colorOnPrimary"
+            app:layout_fitsSystemWindowsInsets="bottom" />
 
         <androidx.coordinatorlayout.widget.CoordinatorLayout
+            android:id="@+id/snackbar_container"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:id="@+id/snackbar_container"
+            app:fitsSystemWindowsInsets="top|bottom" />
-            app:fitsSystemWindowsInsets="top|bottom"/>
 
     </androidx.coordinatorlayout.widget.CoordinatorLayout>