[Slider] Fix attach/detach behavior when Slider is added in an overlay as part of a Transition.

Resolves material-components#1195

A Visibility transition will add Slider to an overlay and then call onAttachToWindow/onDetachFromWindow which looks for an android.R.id.content view, which doen't exist, getting stuck in a loop. This adds an exit strategy for android.R.id.content not being found and fixes Slider in Visibility transitions.

PiperOrigin-RevId: 305886706

Author: hunterstich

lib/java/com/google/android/material/internal/ViewUtils.java

@@ -271,7 +271,10 @@ public static float getParentAbsoluteElevation(@NonNull View view) {
    * version from androidx when it's available.
    */
   @Nullable
-  public static ViewOverlayImpl getOverlay(@NonNull View view) {
+  public static ViewOverlayImpl getOverlay(@Nullable View view) {
+    if (view == null) {
+      return null;
+    }
     if (Build.VERSION.SDK_INT >= 18) {
       return new ViewOverlayApi18(view);
     }
@@ -288,6 +291,10 @@ public static ViewGroup getContentView(@Nullable View view) {
       }
       if (parent.getParent() instanceof ViewGroup) {
         parent = (ViewGroup) parent.getParent();
+      } else if (parent.getParent() == null) {
+        // If android.R.id.content has not been found and parent has no more parents to search,
+        // exit.
+        return null;
       }
     }
     return null;

lib/java/com/google/android/material/slider/Slider.java

@@ -67,6 +67,7 @@
 import com.google.android.material.drawable.DrawableUtils;
 import com.google.android.material.internal.DescendantOffsetUtils;
 import com.google.android.material.internal.ThemeEnforcement;
+import com.google.android.material.internal.ViewOverlayImpl;
 import com.google.android.material.internal.ViewUtils;
 import com.google.android.material.resources.MaterialResources;
 import com.google.android.material.shape.CornerFamily;
@@ -1291,8 +1292,11 @@ protected void onDetachedFromWindow() {
     }
 
     for (TooltipDrawable label : labels) {
-      ViewUtils.getContentViewOverlay(this).remove(label);
-      label.detachView(ViewUtils.getContentView(this));
+      ViewOverlayImpl contentViewOverlay = ViewUtils.getContentViewOverlay(this);
+      if (contentViewOverlay != null) {
+        contentViewOverlay.remove(label);
+        label.detachView(ViewUtils.getContentView(this));
+      }
     }
 
     super.onDetachedFromWindow();

lib/java/com/google/android/material/tooltip/TooltipDrawable.java

@@ -339,7 +339,10 @@ public void setLayoutMargin(@Px int layoutMargin) {
    *
    * @see #detachView(View)
    */
-  public void setRelativeToView(@NonNull View view) {
+  public void setRelativeToView(@Nullable View view) {
+    if (view == null) {
+      return;
+    }
     updateLocationOnScreen(view);
     // Listen for changes that indicate the view has moved so the location can be updated
     view.addOnLayoutChangeListener(attachedViewLayoutChangeListener);
@@ -350,7 +353,10 @@ public void setRelativeToView(@NonNull View view) {
    *
    * @see #setRelativeToView(View)
    */
-  public void detachView(@NonNull View view) {
+  public void detachView(@Nullable View view) {
+    if (view == null) {
+      return;
+    }
     view.removeOnLayoutChangeListener(attachedViewLayoutChangeListener);
   }