【发布时间】:2016-04-19 02:15:50
【问题描述】:
更新:我修改了我原来的问题,因为它太模糊了。
我刚刚实现了一个 RecyclerView,现在我想让每个项目都可点击,这样当我点击一个项目时,它会带我到 DetailsActivity(用于手机和平板电脑),在那里我可以找到有关该项目的更多信息。
我能够在实现 recyclerview 之前执行此操作,因为我只有一个 gridview,我在其中调用 mGridView.setOnItemClickListener。
这是recyclerview之前的代码:
public class BookFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> {
....
.....
public interface CallbackInterface {
/**
* DetailFragmentCallback for when an item has been selected.
*/
public void onItemSelected(Uri bookUri);
}
....
.....
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_main, container, false);
// initialize our BookAdapter
mBookAdapter = new BookAdapter(getActivity(), null, 0, CURSOR_LOADER_ID);
// initialize mGridView to the GridView in fragment_main.xml
mGridView = (GridView) rootView.findViewById(R.id.Book_grid);
// set mGridView adapter to our CursorAdapter
mGridView.setAdapter(mBookAdapter);
// make each item clickable
mGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
int uriId = position + 1;
Uri uri = ContentUris.withAppendedId(BookContentProvider.Book.CONTENT_URI,
uriId);
Cursor cursor = (Cursor) parent.getItemAtPosition(position);
if (cursor != null) {
((CallbackInterface) getActivity())
.onItemSelected(BookContentProvider.Book.withId(cursor.getLong(0))); // getlong(0) gets the row ID
}
}
});
return rootView;
}
.....
}
现在我有了 recyclerview,看起来我不能再调用 mGridView.setOnItemClickListener,因为 Recyclerview 没有这个方法。看起来我可以调用 setOnClickListener 但我不确定如何在 BookCursorAdapter 中实现它:
这是我的代码 BookCursorAdapter:
public class BookCursorAdapter extends CursorRecyclerViewAdapter<BookCursorAdapter.ViewHolder> {
private static final String LOG_TAG = BookCursorAdapter.class.getSimpleName();
private static Context mContext;
private ViewHolder mVh;
public BookCursorAdapter(Context context, Cursor cursor) {
super(context, cursor);
mContext = context;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public final View mView;
public final ImageView imageView;
public ViewHolder(View view) {
super(view);
mView = view;
imageView = (ImageView) view.findViewById(R.id.list_item_book_imageview);
}
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_item_Book, parent, false);
ViewHolder vh = new ViewHolder(itemView);
mVh = vh;
return vh;
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, Cursor cursor) {
DatabaseUtils.dumpCursor(cursor);
int imageIndex = cursor.getColumnIndex(BookColumns.COLUMN_IMAGEPATH);
String image = cursor.getString(imageIndex);
if (image != null) {
Picasso.with(viewHolder.imageView.getContext())
.load("http://image.tmdb.org/t/p/w400/" + image)
.resize(600, 800)
.centerCrop()
.into(viewHolder.imageView);
}
}
}
【问题讨论】:
标签: android android-fragments android-recyclerview android-cursoradapter android-cursor