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Click handling for RecyclerView
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<?xml version="1.0" encoding="utf-8"?> | |
<!-- Inside `res/values/ids.xml` --> | |
<!-- You also need to define R.id.item_click_support using ids.xml --> | |
<resources> | |
<item name="item_click_support" type="id" /> | |
</resources> |
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/* | |
Source: http://www.littlerobots.nl/blog/Handle-Android-RecyclerView-Clicks/ | |
USAGE: | |
ItemClickSupport.addTo(mRecyclerView).setOnItemClickListener(new ItemClickSupport.OnItemClickListener() { | |
@Override | |
public void onItemClicked(RecyclerView recyclerView, int position, View v) { | |
// do it | |
} | |
}); | |
*/ | |
public class ItemClickSupport { | |
private final RecyclerView mRecyclerView; | |
private OnItemClickListener mOnItemClickListener; | |
private OnItemLongClickListener mOnItemLongClickListener; | |
private View.OnClickListener mOnClickListener = new View.OnClickListener() { | |
@Override | |
public void onClick(View v) { | |
if (mOnItemClickListener != null) { | |
RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v); | |
mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v); | |
} | |
} | |
}; | |
private View.OnLongClickListener mOnLongClickListener = new View.OnLongClickListener() { | |
@Override | |
public boolean onLongClick(View v) { | |
if (mOnItemLongClickListener != null) { | |
RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v); | |
return mOnItemLongClickListener.onItemLongClicked(mRecyclerView, holder.getAdapterPosition(), v); | |
} | |
return false; | |
} | |
}; | |
private RecyclerView.OnChildAttachStateChangeListener mAttachListener | |
= new RecyclerView.OnChildAttachStateChangeListener() { | |
@Override | |
public void onChildViewAttachedToWindow(View view) { | |
if (mOnItemClickListener != null) { | |
view.setOnClickListener(mOnClickListener); | |
} | |
if (mOnItemLongClickListener != null) { | |
view.setOnLongClickListener(mOnLongClickListener); | |
} | |
} | |
@Override | |
public void onChildViewDetachedFromWindow(View view) { | |
} | |
}; | |
private ItemClickSupport(RecyclerView recyclerView) { | |
mRecyclerView = recyclerView; | |
mRecyclerView.setTag(R.id.item_click_support, this); | |
mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener); | |
} | |
public static ItemClickSupport addTo(RecyclerView view) { | |
ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support); | |
if (support == null) { | |
support = new ItemClickSupport(view); | |
} | |
return support; | |
} | |
public static ItemClickSupport removeFrom(RecyclerView view) { | |
ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support); | |
if (support != null) { | |
support.detach(view); | |
} | |
return support; | |
} | |
public ItemClickSupport setOnItemClickListener(OnItemClickListener listener) { | |
mOnItemClickListener = listener; | |
return this; | |
} | |
public ItemClickSupport setOnItemLongClickListener(OnItemLongClickListener listener) { | |
mOnItemLongClickListener = listener; | |
return this; | |
} | |
private void detach(RecyclerView view) { | |
view.removeOnChildAttachStateChangeListener(mAttachListener); | |
view.setTag(R.id.item_click_support, null); | |
} | |
public interface OnItemClickListener { | |
void onItemClicked(RecyclerView recyclerView, int position, View v); | |
} | |
public interface OnItemLongClickListener { | |
boolean onItemLongClicked(RecyclerView recyclerView, int position, View v); | |
} | |
} |
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