diff options
Diffstat (limited to 'library/recyclerview/src/com/android/setupwizardlib/items/RecyclerItemAdapter.java')
| -rw-r--r-- | library/recyclerview/src/com/android/setupwizardlib/items/RecyclerItemAdapter.java | 401 |
1 files changed, 198 insertions, 203 deletions
diff --git a/library/recyclerview/src/com/android/setupwizardlib/items/RecyclerItemAdapter.java b/library/recyclerview/src/com/android/setupwizardlib/items/RecyclerItemAdapter.java index 56c60e7..ee753b8 100644 --- a/library/recyclerview/src/com/android/setupwizardlib/items/RecyclerItemAdapter.java +++ b/library/recyclerview/src/com/android/setupwizardlib/items/RecyclerItemAdapter.java @@ -20,14 +20,12 @@ import android.content.res.TypedArray; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.graphics.drawable.LayerDrawable; +import androidx.annotation.VisibleForTesting; +import androidx.recyclerview.widget.RecyclerView; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; - -import androidx.annotation.VisibleForTesting; -import androidx.recyclerview.widget.RecyclerView; - import com.android.setupwizardlib.R; /** @@ -36,217 +34,214 @@ import com.android.setupwizardlib.R; * XML. */ public class RecyclerItemAdapter extends RecyclerView.Adapter<ItemViewHolder> - implements ItemHierarchy.Observer { + implements ItemHierarchy.Observer { - private static final String TAG = "RecyclerItemAdapter"; + private static final String TAG = "RecyclerItemAdapter"; - /** - * A view tag set by {@link View#setTag(Object)}. If set on the root view of a layout, it will - * not create the default background for the list item. This means the item will not have ripple - * touch feedback by default. - */ - public static final String TAG_NO_BACKGROUND = "noBackground"; + /** + * A view tag set by {@link View#setTag(Object)}. If set on the root view of a layout, it will not + * create the default background for the list item. This means the item will not have ripple touch + * feedback by default. + */ + public static final String TAG_NO_BACKGROUND = "noBackground"; - /** - * Listener for item selection in this adapter. - */ - public interface OnItemSelectedListener { - - /** - * Called when an item in this adapter is clicked. - * - * @param item The Item corresponding to the position being clicked. - */ - void onItemSelected(IItem item); - } - - private final ItemHierarchy mItemHierarchy; - private OnItemSelectedListener mListener; - - public RecyclerItemAdapter(ItemHierarchy hierarchy) { - mItemHierarchy = hierarchy; - mItemHierarchy.registerObserver(this); - } + /** Listener for item selection in this adapter. */ + public interface OnItemSelectedListener { /** - * Gets the item at the given position. + * Called when an item in this adapter is clicked. * - * @see ItemHierarchy#getItemAt(int) + * @param item The Item corresponding to the position being clicked. */ - public IItem getItem(int position) { - return mItemHierarchy.getItemAt(position); - } - - @Override - public long getItemId(int position) { - IItem mItem = getItem(position); - if (mItem instanceof AbstractItem) { - final int id = ((AbstractItem) mItem).getId(); - return id > 0 ? id : RecyclerView.NO_ID; - } else { - return RecyclerView.NO_ID; - } - } - - @Override - public int getItemCount() { - return mItemHierarchy.getCount(); - } - - @Override - public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { - final LayoutInflater inflater = LayoutInflater.from(parent.getContext()); - final View view = inflater.inflate(viewType, parent, false); - final ItemViewHolder viewHolder = new ItemViewHolder(view); - - final Object viewTag = view.getTag(); - if (!TAG_NO_BACKGROUND.equals(viewTag)) { - final TypedArray typedArray = parent.getContext() - .obtainStyledAttributes(R.styleable.SuwRecyclerItemAdapter); - Drawable selectableItemBackground = typedArray.getDrawable( - R.styleable.SuwRecyclerItemAdapter_android_selectableItemBackground); - if (selectableItemBackground == null) { - selectableItemBackground = typedArray.getDrawable( - R.styleable.SuwRecyclerItemAdapter_selectableItemBackground); - } - - Drawable background = view.getBackground(); - if (background == null) { - background = typedArray.getDrawable( - R.styleable.SuwRecyclerItemAdapter_android_colorBackground); - } - - if (selectableItemBackground == null || background == null) { - Log.e(TAG, "Cannot resolve required attributes." - + " selectableItemBackground=" + selectableItemBackground - + " background=" + background); - } else { - final Drawable[] layers = {background, selectableItemBackground}; - view.setBackgroundDrawable(new PatchedLayerDrawable(layers)); - } - - typedArray.recycle(); - } - - view.setOnClickListener(new View.OnClickListener() { - @Override - public void onClick(View view) { - final IItem item = viewHolder.getItem(); - if (mListener != null && item != null && item.isEnabled()) { - mListener.onItemSelected(item); - } + void onItemSelected(IItem item); + } + + private final ItemHierarchy itemHierarchy; + private OnItemSelectedListener listener; + + public RecyclerItemAdapter(ItemHierarchy hierarchy) { + itemHierarchy = hierarchy; + itemHierarchy.registerObserver(this); + } + + /** + * Gets the item at the given position. + * + * @see ItemHierarchy#getItemAt(int) + */ + public IItem getItem(int position) { + return itemHierarchy.getItemAt(position); + } + + @Override + public long getItemId(int position) { + IItem mItem = getItem(position); + if (mItem instanceof AbstractItem) { + final int id = ((AbstractItem) mItem).getId(); + return id > 0 ? id : RecyclerView.NO_ID; + } else { + return RecyclerView.NO_ID; + } + } + + @Override + public int getItemCount() { + return itemHierarchy.getCount(); + } + + @Override + public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { + final LayoutInflater inflater = LayoutInflater.from(parent.getContext()); + final View view = inflater.inflate(viewType, parent, false); + final ItemViewHolder viewHolder = new ItemViewHolder(view); + + final Object viewTag = view.getTag(); + if (!TAG_NO_BACKGROUND.equals(viewTag)) { + final TypedArray typedArray = + parent.getContext().obtainStyledAttributes(R.styleable.SuwRecyclerItemAdapter); + Drawable selectableItemBackground = + typedArray.getDrawable( + R.styleable.SuwRecyclerItemAdapter_android_selectableItemBackground); + if (selectableItemBackground == null) { + selectableItemBackground = + typedArray.getDrawable(R.styleable.SuwRecyclerItemAdapter_selectableItemBackground); + } + + Drawable background = view.getBackground(); + if (background == null) { + background = + typedArray.getDrawable(R.styleable.SuwRecyclerItemAdapter_android_colorBackground); + } + + if (selectableItemBackground == null || background == null) { + Log.e( + TAG, + "Cannot resolve required attributes." + + " selectableItemBackground=" + + selectableItemBackground + + " background=" + + background); + } else { + final Drawable[] layers = {background, selectableItemBackground}; + view.setBackgroundDrawable(new PatchedLayerDrawable(layers)); + } + + typedArray.recycle(); + } + + view.setOnClickListener( + new View.OnClickListener() { + @Override + public void onClick(View view) { + final IItem item = viewHolder.getItem(); + if (listener != null && item != null && item.isEnabled()) { + listener.onItemSelected(item); } + } }); - return viewHolder; + return viewHolder; + } + + @Override + public void onBindViewHolder(ItemViewHolder holder, int position) { + final IItem item = getItem(position); + holder.setEnabled(item.isEnabled()); + holder.setItem(item); + item.onBindView(holder.itemView); + } + + @Override + public int getItemViewType(int position) { + // Use layout resource as item view type. RecyclerView item type does not have to be + // contiguous. + IItem item = getItem(position); + return item.getLayoutResource(); + } + + @Override + public void onChanged(ItemHierarchy hierarchy) { + notifyDataSetChanged(); + } + + @Override + public void onItemRangeChanged(ItemHierarchy itemHierarchy, int positionStart, int itemCount) { + notifyItemRangeChanged(positionStart, itemCount); + } + + @Override + public void onItemRangeInserted(ItemHierarchy itemHierarchy, int positionStart, int itemCount) { + notifyItemRangeInserted(positionStart, itemCount); + } + + @Override + public void onItemRangeMoved( + ItemHierarchy itemHierarchy, int fromPosition, int toPosition, int itemCount) { + // There is no notifyItemRangeMoved + // https://code.google.com/p/android/issues/detail?id=125984 + if (itemCount == 1) { + notifyItemMoved(fromPosition, toPosition); + } else { + // If more than one, degenerate into the catch-all data set changed callback, since I'm + // not sure how recycler view handles multiple calls to notifyItemMoved (if the result + // is committed after every notification then naively calling + // notifyItemMoved(from + i, to + i) is wrong). + // Logging this in case this is a more common occurrence than expected. + Log.i(TAG, "onItemRangeMoved with more than one item"); + notifyDataSetChanged(); + } + } + + @Override + public void onItemRangeRemoved(ItemHierarchy itemHierarchy, int positionStart, int itemCount) { + notifyItemRangeRemoved(positionStart, itemCount); + } + + /** + * Find an item hierarchy within the root hierarchy. + * + * @see ItemHierarchy#findItemById(int) + */ + public ItemHierarchy findItemById(int id) { + return itemHierarchy.findItemById(id); + } + + /** Gets the root item hierarchy in this adapter. */ + public ItemHierarchy getRootItemHierarchy() { + return itemHierarchy; + } + + /** + * Sets the listener to listen for when user clicks on a item. + * + * @see OnItemSelectedListener + */ + public void setOnItemSelectedListener(OnItemSelectedListener listener) { + this.listener = listener; + } + + /** + * Before Lollipop, LayerDrawable always return true in getPadding, even if the children layers do + * not have any padding. Patch the implementation so that getPadding returns false if the padding + * is empty. + * + * <p>When getPadding is true, the padding of the view will be replaced by the padding of the + * drawable when {@link View#setBackgroundDrawable(Drawable)} is called. This patched class makes + * sure layer drawables without padding does not clear out original padding on the view. + */ + @VisibleForTesting + static class PatchedLayerDrawable extends LayerDrawable { + + /** {@inheritDoc} */ + PatchedLayerDrawable(Drawable[] layers) { + super(layers); } @Override - public void onBindViewHolder(ItemViewHolder holder, int position) { - final IItem item = getItem(position); - holder.setEnabled(item.isEnabled()); - holder.setItem(item); - item.onBindView(holder.itemView); - } - - @Override - public int getItemViewType(int position) { - // Use layout resource as item view type. RecyclerView item type does not have to be - // contiguous. - IItem item = getItem(position); - return item.getLayoutResource(); - } - - @Override - public void onChanged(ItemHierarchy hierarchy) { - notifyDataSetChanged(); - } - - @Override - public void onItemRangeChanged(ItemHierarchy itemHierarchy, int positionStart, int itemCount) { - notifyItemRangeChanged(positionStart, itemCount); - } - - @Override - public void onItemRangeInserted(ItemHierarchy itemHierarchy, int positionStart, int itemCount) { - notifyItemRangeInserted(positionStart, itemCount); - } - - @Override - public void onItemRangeMoved(ItemHierarchy itemHierarchy, int fromPosition, int toPosition, - int itemCount) { - // There is no notifyItemRangeMoved - // https://code.google.com/p/android/issues/detail?id=125984 - if (itemCount == 1) { - notifyItemMoved(fromPosition, toPosition); - } else { - // If more than one, degenerate into the catch-all data set changed callback, since I'm - // not sure how recycler view handles multiple calls to notifyItemMoved (if the result - // is committed after every notification then naively calling - // notifyItemMoved(from + i, to + i) is wrong). - // Logging this in case this is a more common occurrence than expected. - Log.i(TAG, "onItemRangeMoved with more than one item"); - notifyDataSetChanged(); - } - } - - @Override - public void onItemRangeRemoved(ItemHierarchy itemHierarchy, int positionStart, int itemCount) { - notifyItemRangeRemoved(positionStart, itemCount); - } - - /** - * Find an item hierarchy within the root hierarchy. - * - * @see ItemHierarchy#findItemById(int) - */ - public ItemHierarchy findItemById(int id) { - return mItemHierarchy.findItemById(id); - } - - /** - * Gets the root item hierarchy in this adapter. - */ - public ItemHierarchy getRootItemHierarchy() { - return mItemHierarchy; - } - - /** - * Sets the listener to listen for when user clicks on a item. - * - * @see OnItemSelectedListener - */ - public void setOnItemSelectedListener(OnItemSelectedListener listener) { - mListener = listener; - } - - /** - * Before Lollipop, LayerDrawable always return true in getPadding, even if the children layers - * do not have any padding. Patch the implementation so that getPadding returns false if the - * padding is empty. - * - * When getPadding is true, the padding of the view will be replaced by the padding of the - * drawable when {@link View#setBackgroundDrawable(Drawable)} is called. This patched class - * makes sure layer drawables without padding does not clear out original padding on the view. - */ - @VisibleForTesting - static class PatchedLayerDrawable extends LayerDrawable { - - /** - * {@inheritDoc} - */ - PatchedLayerDrawable(Drawable[] layers) { - super(layers); - } - - @Override - public boolean getPadding(Rect padding) { - final boolean superHasPadding = super.getPadding(padding); - return superHasPadding - && !(padding.left == 0 - && padding.top == 0 - && padding.right == 0 - && padding.bottom == 0); - } + public boolean getPadding(Rect padding) { + final boolean superHasPadding = super.getPadding(padding); + return superHasPadding + && !(padding.left == 0 && padding.top == 0 && padding.right == 0 && padding.bottom == 0); } + } } |