Question

我正在努力实现在Google Play上看到的功能，其中CardView有一个可以点击的选项菜单，您可以点击卡片查看卡上的更多细节。

我在我的RecyclerView上实现了一个OnItemTouch监听器，它可以正常工作并在触摸时响应，带我去另一个活动。但是，当我现在尝试将一个单击侦听器添加到我在RecyclerView项目（即CardView）中添加的选项图标时，将调用OnItemTouch侦听器。有人可以帮忙吗？

活动

mRecyclerView.addOnItemTouchListener(
            new RecyclerItemClickListener(this, new RecyclerItemClickListener.OnItemClickListener() {
                @Override
                public void onItemClick(View view, int position) {
                    Intent intent = new Intent(getApplicationContext(),
                            TransactionDetailActivity.class);
                    Bundle bundle = new Bundle();
                    bundle.putSerializable("transaction_key", mTransactionList.get(position));
                    intent.putExtras(bundle);
                    startActivity(intent);
                }
            })
    );        mRecyclerView.setAdapter(mAdapter);

单击“侦听器”

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.getChildPosition(childView));
            return true;
        }
        return false;
    }

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

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

Answer 1

如果您不想处理CardView孩子的点击，OnItemTouchListener就是这样。

但是如果你想处理cardview子项的cliks，你可能必须将OnClickListener（在Adapter类＆＃39; DataObjectHolder或onBindViewHolder方法中）附加到CardView或其直接子项（可以是任何布局例如.LineLayout ，RelativeLayout等）来处理卡片点击。如果这样做，CardView中任何视图的OnClickListener都可以工作。

以下是一个例子：

<强>适配器

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.DataObjectHolder>{

    Context context;
    ArrayList<String> list;
    static String TAG = "ApprovalsRV Adapter";
    DeleteListener deleteListener;

    public RecyclerViewAdapter(Context context, ArrayList<String> list)
    {
        this.context = context;
        this.list = list;
        deleteListener = (DeleteListener) context;
    }

    public static class DataObjectHolder extends RecyclerView.ViewHolder
    {
        TextView tName;
        RelativeLayout rlName;
        CardView cvName;

        public DataObjectHolder(View itemView, final Context context)
        {
            super(itemView);
            tName = (TextView) itemView.findViewById(R.id.tName);
            rlName = (RelativeLayout) itemView.findViewById(R.id.rlName);
            cvName = (CardView) itemView.findViewById(R.id.cvName);

            cvName.setOnClickListener(new View.OnClickListener()
            {
                @Override
                public void onClick(View view) {
                    //Handle the card click here
                    deleteListener.deleteName(position); // if handling from activity (explained below)
                }
            });

            tName.setOnClickListener(new View.OnClickListener() 
            { //You can have similar listeners for subsequent children
                @Override
                public void onClick(View view) {
                    //Handle the textview click here
                }
            });
        }
    }

    @Override
    public DataObjectHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.card_view_layout, parent, false);
        DataObjectHolder dataObjectHolder = new DataObjectHolder(view, context);
        return dataObjectHolder;
    }

    @Override
    public void onBindViewHolder(DataObjectHolder holder, int position)
    {
        holder.tName.setText(list.get(position));
    }

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

如果您想从活动中处理卡片点击，则需要在此处使用界面。

<强> DeleteListener.java

public interface DeleteListener {
    public void deleteName(int position);
}

现在在您的活动中使用它：

<强> MyActivity.java

public class MyActivity extends AppCompatActivity implements DeleteListener
{
    @Override
    public void deleteName(int position) {
        //Your job
    }
}

这将清除你的怀疑。

Answer 2

不使用OnItemTouchListener来处理RecyclerView项目点击事件，而是使用OnClickListener作为您在ViewHolder中获得的itemView。

public class MyViewHolder extends RecyclerView.ViewHolder implements OnClickListener{
    public MyViewHolder(View itemView){
        super(itemView);
        itemView.setOnClickListener(this);
    }

    @Override
    public void onClick(View v){
        // handle click event
    }

}

因此，当按下选项图标时，将不会调用整个itemView ClickListener。

Android RecyclerView点击次数

2 个答案: