我想在我的项目上添加点击监听器，RecyclerView这样当我点击某个项目时，它会启动一个新项目Intent并从 Web 服务器检索有关该项目的数据。我尝试了很多建议，但没有一个有帮助。
我的 RecylerView 类
public class GetPrice extends AppCompatActivity {
private RecyclerView recyclerView;
private GridLayoutManager gridLayoutManager;
private CustomAdapter adapter;
private List<MyData> dataList;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.getpricerecycle);
recyclerView =(RecyclerView) findViewById(R.id.recycler_view);
dataList = new ArrayList<>();
load_data_from_server(0);
gridLayoutManager = new GridLayoutManager(this,1);
recyclerView.setLayoutManager(gridLayoutManager);
adapter = new CustomAdapter(this,dataList);
recyclerView.setAdapter(adapter);
}
private void load_data_from_server(final int id) {
AsyncTask<Integer,Void,Void> task = new AsyncTask<Integer, Void, Void>() {
@Override
protected Void doInBackground(Integer... params) {
OkHttpClient client = new …我在Kotlin中有RecyclerView适配器，当用户单击categoryPhoto时，我想打开一个新活动。我应该如何实施呢？
class CategoryAdapter(private val categoryList: List<Category>, private val context: Context) : RecyclerView.Adapter<CategoryAdapter.MyViewHolder>() {
class MyViewHolder(view: View) : RecyclerView.ViewHolder(view) {
var categoryName = view.text_view_category_name
var categoryPhoto = view.image_view_category
var cardView = view.card_view_category
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = MyViewHolder(parent.inflate(R.layout.category_list_row))
override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
val category = categoryList[position]
// Set height of cardview based on screen width
val displayMetrics = context.resources.displayMetrics
val finalHeight = displayMetrics.widthPixels / 2
holder.cardView.layoutParams.height = finalHeight
holder.categoryName.text = category.oc
holder.categoryPhoto.loadUrl(category.icon)
}
override fun …我已经使用 recyclerview 创建了图像的水平列表视图，当我单击特定图像时，我想使用我的活动图像更改背景图像，但我遇到了问题，如何设置 onItem click for recyclerview 项目在我的主要活动中？？
我在片段中使用了一个 recycleView，我想向它添加 itemClickListener。这是我的代码：
我的适配器.java：
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private String[] mDataset;
public static class MyViewHolder extends RecyclerView.ViewHolder{
public CardView mCardView;
public TextView mTextView;
public MyViewHolder(View v){
super(v);
mCardView = (CardView) v.findViewById(R.id.card_view);
mTextView = (TextView) v.findViewById(R.id.tv_text);
}
}
public MyAdapter(String[] myDataset){
mDataset = myDataset;
}
@Override
public MyAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_item, parent, false);
MyViewHolder vh = new MyViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(MyViewHolder holder, final int position){
holder.mTextView.setText(mDataset[position]);
}
@Override
public int …