我的应用程序使用以下结构:
Activity > ViewPager > FragmentStatePagerAdapter > Fragment > RecyclerView
我过去一直很舒适地使用RecyclerViews,但是由于某些原因,当放置在Fragment中时,我无法让RecyclerView项注册点击事件。我的ViewHolder如下:
// ViewHolder Class for ExhibitAdapter
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView itemTitleTextView;
public TextView itemDescriptionTextView;
public NetworkImageView itemCoverPhoto;
public ViewHolder(View itemView) {
super(itemView);
itemCoverPhoto = (NetworkImageView) itemView.findViewById(R.id.exhibitThumbnailNIV);
itemTitleTextView = (TextView) itemView.findViewById(R.id.exhibitNameTV);
itemDescriptionTextView = (TextView) itemView.findViewById(R.id.exhibitDescriptionTV);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
try {
Log.d(TAG, "Exhibit clicked");
Exhibit currentExhibit = exhibits.get(getAdapterPosition());
intent.putExtra(ExhibitContentActivity.EXHIBIT_ID , currentExhibit.getId());
intent.putExtra(ExhibitContentActivity.EXHIBIT_COVER_URL , currentExhibit.getCoverPhotoUrl());
ActivityOptionsCompat options = ActivityOptionsCompat.
makeSceneTransitionAnimation((Activity) adapterContext, itemView.findViewById(R.id.exhibitThumbnailNIV), "profile");
Log.i(TAG, "Attempting to launch detail activity with exhibit id: " + currentExhibit.getId());
adapterContext.startActivity(intent, options.toBundle());
}
catch(IndexOutOfBoundsException e) {
Log.e(TAG, "* Error: Adapter position exceeded the no. of items.");
}
}
}
任何帮助,将不胜感激。我尝试按照以下列出的步骤进行操作:https://guides.codepath.com/android/Creating-and-Using-Fragments#fragment-listener创建一个片段交互侦听器,但是我不确定如何从RecyclerView的适配器中实现它。提前致谢!
最佳答案
您应该在RecyclerView适配器的onBindViewHolder方法中而不是在ViewHolder中设置onClickListener。问题在于ViewHolders不是实际的视图(因此您不能单击一个视图),它们是绑定到视图的所有者,并允许您将这些视图重用于多个列表项以减少应用程序的内存占用。
RecyclerView.Adapter实现
public MyAdapter extends RecyclerView.Adapter<YourViewHolderClass> {
.
.
.
@Override
public void onBindViewHolder(final YourViewHolderClass holder, int position) {
holder.itemView.setOnClickListener (new View.OnClickListener() {
@Override
public void onClick(View v) {
// Do something!
}
});
// Do you other view binding operations
}
.
.
.
}
确保将
itemView
的副本本地存储在视图持有者中,以便可以将OnClickListener绑定到列表项的容器。RecyclerView.ViewHolder实现
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView itemTitleTextView;
public TextView itemDescriptionTextView;
public NetworkImageView itemCoverPhoto;
public View itemView;
public ViewHolder(View itemView) {
super(itemView);
this.itemView = itemView;
itemCoverPhoto = (NetworkImageView) itemView.findViewById(R.id.exhibitThumbnailNIV);
itemTitleTextView = (TextView) itemView.findViewById(R.id.exhibitNameTV);
itemDescriptionTextView = (TextView) itemView.findViewById(R.id.exhibitDescriptionTV);
}
}
我希望这有帮助!
-汤姆
关于android - 单击不适用于 fragment 内的RecyclerView项目,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/40611576/