[英]RecyclerView.Adapter onClick
我在RecyclerView.Adapter
实现view.OnClickListener
时遇到问题。 我正在尝试实现多窗格布局(与RecyclerView
和详细信息并排的横向平板电脑布局版本)。 到目前为止,我已经创建了这个Activity
:
public class MovieListActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_movie_list);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
MovieListFragment movieListFragment = new MovieListFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.recycler_view_fragment, movieListFragment);
transaction.addToBackStack(null);
transaction.commit();
}
}
这开始一个Fragment
:
public class MovieListFragment extends Fragment {
@BindView(R.id.recyclerView)
RecyclerView mRecyclerView;
private MoviesAdapter mAdapter;
public MovieListFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mAdapter = new MoviesAdapter(getContext());
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_movie_list, container, false);
ButterKnife.bind(this,view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
mRecyclerView.setAdapter(mAdapter);
return view;
}
@Override
public void onStart() {
super.onStart();
getPopularMovies();
}
private void getPopularMovies() {
RestAdapter restAdapter = new RestAdapter.Builder()
.setEndpoint("http://api.themoviedb.org")
.setLogLevel(RestAdapter.LogLevel.FULL)
.build();
MoviesApiService service = restAdapter.create(MoviesApiService.class);
service.getPopularMovies(new Callback<Movie.MovieResult>() {
@Override
public void success(Movie.MovieResult movieResult, Response response) {
mAdapter.setMovieList(movieResult.getResults());
}
@Override
public void failure(RetrofitError error) { error.printStackTrace(); }
});
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
}
@Override
public void onDetach() {
super.onDetach();
}
}
它调用RecyclerView.Adapter
:
public class MoviesAdapter extends RecyclerView.Adapter<MovieViewHolder> {
private List<Movie> mMovieList;
private LayoutInflater mInflater;
private Context mContext;
public MoviesAdapter(Context context) {
this.mContext = context;
this.mInflater = LayoutInflater.from(context); //
}
@Override
public MovieViewHolder onCreateViewHolder(ViewGroup parent, final int viewType) {
View view = mInflater.inflate(R.layout.movie_row_item, parent, false);
final MovieViewHolder viewHolder = new MovieViewHolder(view);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int position = viewHolder.getAdapterPosition();
Intent intent = new Intent(mContext, MovieDetailActivity.class);
intent.putExtra(MovieDetailActivity.MOVIE_EXTRA, mMovieList.get(position));
mContext.startActivity(intent);
}
});
return viewHolder;
}
@Override
public void onBindViewHolder(MovieViewHolder holder, int position) {
Movie movie = mMovieList.get(position);
Picasso.with(mContext)
.load(movie.getPoster())
.placeholder(R.color.colorAccent)
.into(holder.thumbnail);
holder.movieTitle.setText(movie.getTitle());
holder.rating.setText(movie.getRating());
}
@Override
public int getItemCount() {
return (mMovieList == null) ? 0 : mMovieList.size();
}
public void setMovieList(List<Movie> movieList) {
this.mMovieList = new ArrayList<>();
this.mMovieList.addAll(movieList);
notifyDataSetChanged();
}
}
在onClick
我需要决定是启动一个新的Activity
(如在我的代码中)还是更新详细信息Fragment
内容(在我的平板电脑横向布局中)。 根据此链接 ,您应根据事实确定您的DetailFragment在活动中是否为!= null,如下所示:
public void onItemSelected(int position) {
DisplayFragment displayFrag = (DisplayFragment) getFragmentManager()
.findFragmentById(R.id.display_frag);
if (displayFrag == null) {
// DisplayFragment (Fragment B) is not in the layout (handset layout),
// so start DisplayActivity (Activity B)
// and pass it the info about the selected item
Intent intent = new Intent(this, DisplayActivity.class);
intent.putExtra("position", position);
startActivity(intent);
} else {
// DisplayFragment (Fragment B) is in the layout (tablet layout),
// so tell the fragment to update
displayFrag.updateContent(position);
}
}
但是我无法在Adapter中进行检查。 任何帮助将不胜感激! 谢谢。
创建了自定义界面click动作以将控件获取到片段类中
我希望它对你有用
公共类MoviesAdapter扩展了RecyclerView.Adapter {
MoviesAdapterCallback moviesAdapterCallback;
private List<Movie> mMovieList;
private LayoutInflater mInflater;
private Context mContext;
public MoviesAdapter(Context context,MoviesAdapterCallback moviesAdapterCallback) {
this.mContext = context;
this.moviesAdapterCallback =moviesAdapterCallback;
this.mInflater = LayoutInflater.from(context); //
}
@Override
public MovieViewHolder onCreateViewHolder(ViewGroup parent, final int viewType) {
View view = mInflater.inflate(R.layout.movie_row_item, parent, false);
final MovieViewHolder viewHolder = new MovieViewHolder(view);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
/* int position = viewHolder.getAdapterPosition();
Intent intent = new Intent(mContext, MovieDetailActivity.class);
intent.putExtra(MovieDetailActivity.MOVIE_EXTRA, mMovieList.get(position));
mContext.startActivity(intent);
* / filmsAdapterCallback.MovieClicked(view);
}
});
return viewHolder;
}
@Override
public void onBindViewHolder(MovieViewHolder holder, int position) {
Movie movie = mMovieList.get(position);
Picasso.with(mContext)
.load(movie.getPoster())
.placeholder(R.color.colorAccent)
.into(holder.thumbnail);
holder.movieTitle.setText(movie.getTitle());
holder.rating.setText(movie.getRating());
}
@Override
public int getItemCount() {
return (mMovieList == null) ? 0 : mMovieList.size();
}
public void setMovieList(List<Movie> movieList) {
this.mMovieList = new ArrayList<>();
this.mMovieList.addAll(movieList);
notifyDataSetChanged();
}
public interface MoviesAdapterCallback {
void MovieClicked(View view);
}
}
在片段类中
公共类MovieListFragment扩展Fragment {
@BindView(R.id.recyclerView)
RecyclerView mRecyclerView;
private MoviesAdapter mAdapter;
public MovieListFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_movie_list, container, false);
ButterKnife.bind(this,view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
mAdapter = new MoviesAdapter(getContext(), new MoviesAdapter.MoviesAdapterCallback(){
@Override
public void MovieClicked(View view) {
DisplayFragment displayFrag = (DisplayFragment) getFragmentManager()
.findFragmentById(R.id.display_frag);
if (displayFrag == null) {
// DisplayFragment (Fragment B) is not in the layout (handset layout),
// so start DisplayActivity (Activity B)
// and pass it the info about the selected item
Intent intent = new Intent(this, DisplayActivity.class);
intent.putExtra("position", position);
startActivity(intent);
} else {
// DisplayFragment (Fragment B) is in the layout (tablet layout),
// so tell the fragment to update
displayFrag.updateContent(position);
}
}
});
mRecyclerView.setAdapter(mAdapter);
return view;
}
@Override
public void onStart() {
super.onStart();
getPopularMovies();
}
private void getPopularMovies() {
RestAdapter restAdapter = new RestAdapter.Builder()
.setEndpoint("http://api.themoviedb.org")
.setLogLevel(RestAdapter.LogLevel.FULL)
.build();
MoviesApiService service = restAdapter.create(MoviesApiService.class);
service.getPopularMovies(new Callback<Movie.MovieResult>() {
@Override
public void success(Movie.MovieResult movieResult, Response response) {
mAdapter.setMovieList(movieResult.getResults());
}
@Override
public void failure(RetrofitError error) { error.printStackTrace(); }
});
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
}
@Override
public void onDetach() {
super.onDetach();
}
}
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