adding some null checks around touch events

app/src/main/kotlin/com/simplemobiletools/launcher/activities/MainActivity.kt

@@ -424,12 +424,14 @@ class MainActivity : SimpleActivity(), FlingListener {
     }
 
     private class MyGestureListener(private val flingListener: FlingListener) : GestureDetector.SimpleOnGestureListener() {
-        override fun onSingleTapUp(event: MotionEvent): Boolean {
+        override fun onSingleTapUp(event: MotionEvent?): Boolean {
-            (flingListener as MainActivity).homeScreenClicked(event.x, event.y)
+            if (event != null) {
+                (flingListener as MainActivity).homeScreenClicked(event.x, event.y)
+            }
             return super.onSingleTapUp(event)
         }
 
-        override fun onFling(event1: MotionEvent, event2: MotionEvent, velocityX: Float, velocityY: Float): Boolean {
+        override fun onFling(event1: MotionEvent?, event2: MotionEvent?, velocityX: Float, velocityY: Float): Boolean {
             // ignore fling events just after releasing an icon from dragging
             if (System.currentTimeMillis() - mLastUpEvent < 500L) {
                 return true
@@ -443,8 +445,10 @@ class MainActivity : SimpleActivity(), FlingListener {
             return true
         }
 
-        override fun onLongPress(event: MotionEvent) {
+        override fun onLongPress(event: MotionEvent?) {
-            (flingListener as MainActivity).homeScreenLongPressed(event.x, event.y)
+            if (event != null) {
+                (flingListener as MainActivity).homeScreenLongPressed(event.x, event.y)
+            }
         }
     }
 

app/src/main/kotlin/com/simplemobiletools/launcher/fragments/AllAppsFragment.kt

@@ -51,7 +51,11 @@ class AllAppsFragment(context: Context, attributeSet: AttributeSet) : MyFragment
         setupAdapter(launchers)
     }
 
-    override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
+    override fun onInterceptTouchEvent(event: MotionEvent?): Boolean {
+        if (event == null) {
+            return super.onInterceptTouchEvent(event)
+        }
+
         if (ignoreTouches) {
             // some devices ACTION_MOVE keeps triggering for the whole long press duration, but we are interested in real moves only, when coords change
             if (lastTouchCoords.first != event.x || lastTouchCoords.second != event.y) {

app/src/main/kotlin/com/simplemobiletools/launcher/fragments/WidgetsFragment.kt

@@ -53,7 +53,11 @@ class WidgetsFragment(context: Context, attributeSet: AttributeSet) : MyFragment
         setupAdapter(appWidgets)
     }
 
-    override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
+    override fun onInterceptTouchEvent(event: MotionEvent?): Boolean {
+        if (event == null) {
+            return super.onInterceptTouchEvent(event)
+        }
+
         if (ignoreTouches) {
             // some devices ACTION_MOVE keeps triggering for the whole long press duration, but we are interested in real moves only, when coords change
             if (lastTouchCoords.first != event.x || lastTouchCoords.second != event.y) {

app/src/main/kotlin/com/simplemobiletools/launcher/views/MyAppWidgetHostView.kt

@@ -28,8 +28,8 @@ class MyAppWidgetHostView(context: Context) : AppWidgetHostView(context) {
         }
     }
 
-    override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
+    override fun onInterceptTouchEvent(event: MotionEvent?): Boolean {
-        if (ignoreTouches) {
+        if (ignoreTouches || event == null) {
             return true
         }