ClassCastException when calling ListView.addHeaderView ()?

Question

I have a pretty complicated layout (containing RelativeLayouts, TextViews and ImageViews) that I want to place above the list. This view should scroll through the list.

I tried to add the layout as a title to the list using this code:

View v = inflater.inflate(R.layout.list_view, container, false); View header = inflater.inflate(R.layout.header_layout, container, false); // populate views in the header mList = (ListView)v.findViewById(R.id.list); mList.addHeaderView(header); mAdapter = new ReviewsAdapter(getActivity()); mList.setAdapter(mAdapter); <-- error occurs here 

ReviewsAdapter is a custom adapter that I wrote that extends the BaseAdapter .

After executing the code, I get this error:

 11-25 17:19:14.802: E/AndroidRuntime(1215): java.lang.ClassCastException: android.widget.FrameLayout$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams 11-25 17:19:14.802: E/AndroidRuntime(1215): at android.widget.ListView.clearRecycledState(ListView.java:513) 11-25 17:19:14.802: E/AndroidRuntime(1215): at android.widget.ListView.resetList(ListView.java:499) 11-25 17:19:14.802: E/AndroidRuntime(1215): at android.widget.ListView.setAdapter(ListView.java:442) 11-25 17:19:14.802: E/AndroidRuntime(1215): at com.coppi.storefront.product.ProductReviewsFragment.onCreateView(ProductReviewsFragment.java:104) 

If I comment out the line mList.addHeaderView(header) , I will not get an error. I can also display the header layout without a list without any problems.

I suppose this has something to do with the contents of the header layout, but I'm not sure what exactly would trigger it.

Here is the xml header:

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" > <RelativeLayout android:id="@+id/header_section" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="@dimen/margin_sides" android:background="@color/pdp_availability_section_background" > <TextView android:id="@+id/header_text" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="@dimen/margin_sides" android:paddingBottom="@dimen/margin_sides" android:text="@string/ratings_reviews" android:textColor="#000" android:textSize="18dp" /> </RelativeLayout> <RelativeLayout android:id="@+id/body_section" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_below="@id/header_section" > <TextView android:id="@+id/product_title" style="@style/ProductTitleFont" android:layout_marginBottom="@dimen/product_title_bottom_margin" android:layout_marginLeft="@dimen/margin_sides" android:layout_marginRight="@dimen/margin_sides" /> <RelativeLayout android:id="@+id/attributes_section" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/product_title" android:layout_centerHorizontal="true" android:layout_margin="@dimen/margin_sides" > <LinearLayout android:id="@+id/overall_section" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal" android:gravity="bottom" > <TextView android:id="@+id/overall_label" style="@style/ProductTitleFont" android:layout_width="wrap_content" android:text="@string/overall_rating" /> <ImageView android:id="@+id/overall_1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:src="@drawable/icon_rating_empty" /> <ImageView android:id="@+id/overall_2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/icon_rating_empty" /> <ImageView android:id="@+id/overall_3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/icon_rating_empty" /> <ImageView android:id="@+id/overall_4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/icon_rating_empty" /> <ImageView android:id="@+id/overall_5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/icon_rating_empty" /> <TextView android:id="@+id/overall_score" style="@style/ProductTitleFont" android:layout_width="wrap_content" android:layout_marginLeft="10dp" android:text="4.6" /> </LinearLayout> <Button android:id="@+id/rate_review_button" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/overall_section" android:layout_marginBottom="@dimen/margin_sides" android:layout_marginTop="@dimen/margin_sides" android:text="@string/rate_review_button_text" /> </RelativeLayout> <View android:id="@+id/attributes_divider" android:layout_width="fill_parent" android:layout_height="1dp" android:layout_below="@id/attributes_section" android:layout_marginBottom="@dimen/margin_sides" android:layout_marginTop="@dimen/margin_sides" android:background="@color/pdp_section_divider" /> <TextView android:id="@+id/review_count" style="@style/ProductTitleFont" android:layout_width="wrap_content" android:layout_below="@id/attributes_divider" android:layout_marginLeft="@dimen/margin_sides" android:text="0 " /> <TextView style="@style/ProductTitleFont" android:layout_width="wrap_content" android:layout_alignBaseline="@id/review_count" android:layout_marginRight="@dimen/margin_sides" android:layout_toRightOf="@id/review_count" android:text="@string/customer_reviews" /> <View android:id="@+id/review_count_divider" android:layout_width="fill_parent" android:layout_height="1dp" android:layout_below="@id/review_count" android:layout_marginBottom="@dimen/margin_sides" android:layout_marginTop="@dimen/margin_sides" android:background="@color/pdp_section_divider" /> </RelativeLayout> </RelativeLayout> 

Update: I tried to reduce the header .xml file in only one TextView, and the problem continues. Therefore, I do not believe that the problem is due to something in xml.

Answer 1

FrameLayout and AbsListView convert their child layout settings to FrameLayout.LayoutParams and AbsListView.LayoutParams . This is where the cast fails.

 View header = View.inflate(this, R.layout.header_layout, null); 

must fix it.

Edit: As mentioned in the comments, changing the ViewGroup parameter to call the inflate also makes it work:

 header = inflater.inflate(R.layout.header_layout, null, false); 

Answer 2

Although Souvlaki's method will fix the problem and let you continue. It is always better that the view be inflated with a reference to the container in which it will be. This allows Android to properly inflate it for the right context.

What you need to do is find the ListView , and then pass this inflation.

 ListView listView = (ListView) layout.findViewById(R.id.listview); View header = inflater.inflate(this, R.layout.header_layout, listView, false); 

Answer 3

From the drspaceboo post above , this worked for me:

 @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { mListLayoutView = inflater.inflate(getLayoutId(), container, false); int headerLayoutId = R.layout.list_header_layout; mListHeaderView = inflater.inflate(headerLayoutId, mResourcesListView, false); // ... mResourcesListView.addHeaderView(mListHeaderView, null, false); 

Where getLayoutId () returns the main layout containing ListView xml

Answer 4

I see the same situation. in my case, this is a timing issue for ListView.addHeaderView ().

Before: (Error)
ListView.addHeaderView () is called in the Fragment.onCreateView () method.

 @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View layout = inflater.inflate(R.layout.fragment_main, container, false); mListView = (ListView) layout.findViewById(R.id.listview); mListView.addHeaderView(inflater.inflate(R.layout.list_header_book, listview, false)); return layout; } @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); mAdapter = new BookAdapter(getActivity(), mBookList); mListView.setOnItemClickListener(mBookItemClickListener); mListView.setAdapter(mAdapter); } 

After: (OK)
ListView.addHeaderView () is called in the Fragment.onActivityCreated () method.

 @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_main, container, false); } @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); mAdapter = new BookAdapter(getActivity(), mBookList); mListView = (ListView) getView().findViewById(R.id.listview); mListView.setOnItemClickListener(mBookItemClickListener); mListView.addHeaderView(LayoutInflater.from(getActivity()).inflate(R.layout.list_header_book, null)); mListView.setAdapter(mAdapter); }