Add an emulator pause button to the OSC

app/src/main/java/emu/skyline/EmulationActivity.kt

@@ -91,6 +91,8 @@ class EmulationActivity : AppCompatActivity(), SurfaceHolder.Callback, View.OnTo
      */
     private var desiredRefreshRate = 60f
 
+    private var isEmulatorPaused = false
+
     private lateinit var pictureInPictureParamsBuilder : PictureInPictureParams.Builder
     private val pauseIntentAction = "$packageName.EMULATOR_PAUSE"
     private val muteIntentAction = "$packageName.EMULATOR_MUTE"
@@ -343,18 +345,37 @@ class EmulationActivity : AppCompatActivity(), SurfaceHolder.Callback, View.OnTo
             setOnClickListener { binding.onScreenControllerView.isInvisible = !binding.onScreenControllerView.isInvisible }
         }
 
+        binding.onScreenPauseToggle.apply {
+            isGone = binding.onScreenControllerView.isGone
+            setOnClickListener {
+                if (isEmulatorPaused) {
+                    resumeEmulator()
+                    binding.onScreenPauseToggle.setImageResource(R.drawable.ic_pause)
+                } else {
+                    pauseEmulator()
+                    binding.onScreenPauseToggle.setImageResource(R.drawable.ic_play)
+                }
+            }
+        }
+
         executeApplication(intent!!)
     }
 
+    @SuppressWarnings("WeakerAccess")
     fun pauseEmulator() {
+        if (isEmulatorPaused) return
         setSurface(null)
         changeAudioStatus(false)
+        isEmulatorPaused = true
     }
 
+    @SuppressWarnings("WeakerAccess")
     fun resumeEmulator() {
+        if (!isEmulatorPaused) return
         gameSurface?.let { setSurface(it) }
         if (!emulationSettings.isAudioOutputDisabled)
             changeAudioStatus(true)
+        isEmulatorPaused = false
     }
 
     override fun onPause() {
@@ -414,6 +435,7 @@ class EmulationActivity : AppCompatActivity(), SurfaceHolder.Callback, View.OnTo
 
             binding.onScreenControllerView.isGone = true
             binding.onScreenControllerToggle.isGone = true
+            binding.onScreenPauseToggle.isGone = true
         } else {
             try {
                 if (this::pictureInPictureReceiver.isInitialized)
@@ -431,6 +453,9 @@ class EmulationActivity : AppCompatActivity(), SurfaceHolder.Callback, View.OnTo
             binding.onScreenControllerToggle.apply {
                 isGone = binding.onScreenControllerView.isGone
             }
+            binding.onScreenPauseToggle.apply {
+                isGone = binding.onScreenControllerView.isGone
+            }
         }
     }
 

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

@@ -30,6 +30,18 @@
         tools:text="60 FPS\n16.6±0.10ms"
         android:textColor="@color/colorPerfStatsPrimary" />
 
+    <ImageButton
+        android:id="@+id/on_screen_pause_toggle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="top|right"
+        android:layout_marginRight="@dimen/onScreenItemHorizontalMargin"
+        android:background="?android:attr/actionBarItemBackground"
+        android:padding="8dp"
+        android:src="@drawable/ic_pause"
+        app:tint="#40FFFFFF"
+        tools:ignore="ContentDescription" />
+
     <ImageButton
         android:id="@+id/on_screen_controller_toggle"
         android:layout_width="wrap_content"