Question

所以当我点击不同的recyclerview行时，我需要开始一项活动。我只是弄清楚我是如何尝试这个代码的但似乎无法正常工作

class MyViewholder extends RecyclerView.ViewHolder implements View.OnClickListener{
    private final Context context;

public MyViewholder(View itemView) {
    super(itemView);
    context = itemView.getContext();
}

@Override
public void onClick(View view) {
    final Intent intent;
   switch (getAdapterPosition()){
        case 0:
            intent =  new Intent(context, CalendarControllerFrancisco.class);
            break;

        case 1:
            intent =  new Intent(context, CalendarControllerB.class);
            break;

        case 2:
            intent =  new Intent(context, CalendarControllerNa.class);
            break;

        default:
            intent =  new Intent(context, CalendarController.class);
            break;
    }
    context.startActivity(intent);

公共类LocationAdapter扩展了RecyclerView.Adapter {

private ArrayList<LocationModel> dataSet;
Boolean check = false;
public class MyViewHolder extends RecyclerView.ViewHolder {
//private final Context context;
    TextView locat;


    public MyViewHolder(View itemView) {
        super(itemView);
       // context = itemView.getContext();
        this.locat = (TextView)itemView.findViewById(R.id.wordtext);
    }
}


public LocationAdapter(ArrayList<LocationModel> data) {
    this.dataSet = data;
}


@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.card_view_row,parent,false);
   MyViewHolder myViewHolder = new MyViewHolder(view);
   return myViewHolder;
}

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {

    TextView word1 = holder.locat;
    word1.setText(dataSet.get(position).getLocations());
}

@Override
public int getItemCount() {
    return dataSet.size();
}

Answer 1

您需要为一个组件添加 setOnClickListener事件。

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {

    TextView word1 = holder.locat;
    word1.setText(dataSet.get(position).getLocations());
    word.setOnClickListener(holder);
}

Answer 2

RecyclerItemClickListener

public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;

public interface OnItemClickListener {
    public void onItemClick(View view, int position);
}

GestureDetector mGestureDetector;

public RecyclerItemClickListener(Context context, OnItemClickListener listener) {
    mListener = listener;
    mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
        @Override
        public boolean onSingleTapUp(MotionEvent e) {
            return true;
        }
    });
}

@Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
    View childView = view.findChildViewUnder(e.getX(), e.getY());
    if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
        mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
    }
    return false;
}

@Override
public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) {
}

@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}

将ClickListener定义为与ListView onItemClickListener
相同

recyclerView.addOnItemTouchListener(  
    new RecyclerItemClickListener(context, new RecyclerItemClickListener.OnItemClickListener() {
     @Override public void onItemClick(View view, int position) {
     // TODO Handle item click
  }
})
);

Answer 3

这是错误的：

@Override
public void onClick(View view) {
    final Intent intent;
   switch (getAdapterPosition()){
        case 0:
            intent =  new Intent(context, CalendarControllerFrancisco.class);
            break;

        case 1:
            intent =  new Intent(context, CalendarControllerB.class);
            break;

        case 2:
            intent =  new Intent(context, CalendarControllerNa.class);
            break;

        default:
            intent =  new Intent(context, CalendarController.class);
            break;
    }}

ViewHolder是适配器用来根据要显示的RecyclerView项目任意填充项目数据的容器。因此，它不应该访问项目列表中的任何位置数据以识别自身。你是混乱的概念。

尝试用以下内容替换上述内容：

class MyViewholder extends RecyclerView.ViewHolder implements View.OnClickListener {

private final Context context;
int type;

public MyViewholder(View itemView) {
    super(itemView);
    context = itemView.getContext();
}

public void bind(int type) {
    this.type = type;
}

@Override
public void onClick(View view) {
    final Intent intent;
    switch (this.type){
        case 0:
            intent =  new Intent(context, CalendarControllerFrancisco.class);
            break;

        case 1:
            intent =  new Intent(context, CalendarControllerB.class);
            break;

        case 2:
            intent =  new Intent(context, CalendarControllerNa.class);
            break;

        default:
            intent =  new Intent(context, CalendarController.class);
            break;
    }
}

}

然后，在您的Adapter中使用onBindViewHolder回调来访问项集合并为每个项目的创建分配它们的类型。类似的东西：

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {

    holder.bind(myItemList.get(position).type());

}

如何在每一行Recyclerview上打开不同的课程

3 个答案: