{"record":{"id":"4f5d3a680c360158","repo":"material-components/material-components-android","slug":"the-view-is-not-associated-with-sidesheetbehavior","errorCode":null,"errorMessage":"The view is not associated with SideSheetBehavior","messagePattern":"The view is not associated with SideSheetBehavior","errorType":"exception","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"lib/java/com/google/android/material/sidesheet/SideSheetBehavior.java","lineNumber":1173,"sourceCode":"        };\n  }\n\n  /**\n   * A utility function to get the {@link SideSheetBehavior} associated with the {@code view}.\n   *\n   * @param view The {@link View} with {@link SideSheetBehavior}.\n   * @return The {@link SideSheetBehavior} associated with the {@code view}.\n   */\n  @NonNull\n  @SuppressWarnings(\"unchecked\")\n  public static <V extends View> SideSheetBehavior<V> from(@NonNull V view) {\n    ViewGroup.LayoutParams params = view.getLayoutParams();\n    if (!(params instanceof LayoutParams)) {\n      throw new IllegalArgumentException(\"The view is not a child of CoordinatorLayout\");\n    }\n    CoordinatorLayout.Behavior<?> behavior = ((LayoutParams) params).getBehavior();\n    if (!(behavior instanceof SideSheetBehavior)) {\n      throw new IllegalArgumentException(\"The view is not associated with SideSheetBehavior\");\n    }\n    return (SideSheetBehavior<V>) behavior;\n  }\n\n  private void updateAccessibilityActions() {\n    if (viewRef == null) {\n      return;\n    }\n    V child = viewRef.get();\n    if (child == null) {\n      return;\n    }\n    ViewCompat.removeAccessibilityAction(child, AccessibilityNodeInfoCompat.ACTION_EXPAND);\n    ViewCompat.removeAccessibilityAction(child, AccessibilityNodeInfoCompat.ACTION_DISMISS);\n\n    if (state != STATE_HIDDEN) {\n      replaceAccessibilityActionForState(\n          child, AccessibilityActionCompat.ACTION_DISMISS, STATE_HIDDEN);","sourceCodeStart":1155,"sourceCodeEnd":1191,"githubUrl":"https://github.com/material-components/material-components-android/blob/ac7e18efeefb331850c561faf9ab8bf81d27ba68/lib/java/com/google/android/material/sidesheet/SideSheetBehavior.java#L1155-L1191","documentation":"SideSheetBehavior.from(view) throws IllegalArgumentException when the view IS a CoordinatorLayout child but its LayoutParams carry no SideSheetBehavior — the required app:layout_behavior is missing or points at another behavior. from() is the typed accessor that assumes the wiring is already done.","triggerScenarios":"Calling from(view) on a CoordinatorLayout child that lacks app:layout_behavior=\"...SideSheetBehavior\", has a different behavior (e.g. BottomSheetBehavior), or sets behavior programmatically on the wrong LayoutParams instance.","commonSituations":"Forgetting the layout_behavior attribute when converting a plain view into a side sheet; typo in the behavior class string (silently yields no behavior); copying bottom-sheet layouts and changing the id but not the behavior.","solutions":["Add app:layout_behavior=\"com.google.android.material.sidesheet.SideSheetBehavior\" to the sheet view inside the CoordinatorLayout.","Or set it in code: ((CoordinatorLayout.LayoutParams) view.getLayoutParams()).behavior = new SideSheetBehavior<>();","Double-check the fully-qualified behavior string for typos."],"exampleFix":"<!-- before -->\n<View android:id=\"@+id/sheet\" android:layout_width=\"wrap_content\" ... />\n\n<!-- after -->\n<com.google.android.material.sidesheet.SheetContentView\n    xmlns:app=\"http://schemas.android.com/apk/res-auto\"\n    android:id=\"@+id/sheet\"\n    app:layout_behavior=\"com.google.android.material.sidesheet.SideSheetBehavior\" ... />","handlingStrategy":"type-guard","validationCode":"ViewParent p = sheetView.getParent();\nif (p instanceof CoordinatorLayout\n    && ((CoordinatorLayout.LayoutParams) sheetView.getLayoutParams()).getBehavior()\n        instanceof SideSheetBehavior) {\n  SideSheetBehavior<View> behavior = SideSheetBehavior.from(sheetView);\n}","typeGuard":"static boolean hasSideSheetBehavior(View v) {\n  ViewGroup.LayoutParams lp = v.getLayoutParams();\n  return lp instanceof CoordinatorLayout.LayoutParams\n      && ((CoordinatorLayout.LayoutParams) lp).getBehavior() instanceof SideSheetBehavior;\n}","tryCatchPattern":null,"preventionTips":["Always declare app:layout_behavior=\"com.google.android.material.sidesheet.SideSheetBehavior\" on the sheet view.","Copy the behavior string from official docs to avoid typos.","Verify with hasSideSheetBehavior(view) before calling from()."],"tags":["android","material-components","sidesheet","layout","coordinatorlayout"],"backgroundTag":null,"analyzedSha":"ac7e18efeefb331850c561faf9ab8bf81d27ba68","analyzedAt":"2026-08-14T15:35:35.735Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}