另一種實現 Item Click Listener 的方法

實現專案單擊偵聽器的另一種方法是使用具有多個方法的介面，其數量等於可單擊檢視的數量，並使用覆蓋的單擊偵聽器，如下所示。此方法更靈活，因為你可以將單擊偵聽器設定為不同的檢視，並且可以非常輕鬆地分別為每個檢視控制單擊邏輯。

public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.CustomHolder> {

    private ArrayList<Object> mObjects;
    private ClickInterface mClickInterface;

    public interface ClickInterface {
        void clickEventOne(Object obj);
        void clickEventTwo(Object obj1, Object obj2);
    }

    public void setClickInterface(ClickInterface clickInterface) {
        mClickInterface = clickInterface;
    }

    public CustomAdapter(){
        mList = new ArrayList<>();
    }

    public void addItems(ArrayList<Object> objects) {
        mObjects.clear();
        mObjects.addAll(objects);
        notifyDataSetChanged();
    }

    @Override
    public CustomHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext())
                                .inflate(R.layout.list_item, parent, false);
        return new CustomHolder(v);
    }

    @Override
    public void onBindViewHolder(CustomHolder holder, int position) {
        //make all even positions not clickable
        holder.firstClickListener.setClickable(position%2==0);
        holder.firstClickListener.setPosition(position);
        holder.secondClickListener.setPosition(position);
    }

    private class FirstClickListener implements View.OnClickListener {
        private int mPosition;
        private boolean mClickable;

        void setPosition(int position) {
            mPosition = position;
        }

        void setClickable(boolean clickable) {
            mPosition = position;
        }

        @Override
        public void onClick(View v) {
            if(mClickable) {
                mClickInterface.clickEventOne(mObjects.get(mPosition));
            }
        }
    }

    private class SecondClickListener implements View.OnClickListener {
        private int mPosition;

        void setPosition(int position) {
            mPosition = position;
        }

        @Override
        public void onClick(View v) {
            mClickInterface.clickEventTwo(mObjects.get(mPosition), v);
        }
    }

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

    protected class CustomHolder extends RecyclerView.ViewHolder {
        FirstClickListener firstClickListener;
        SecondClickListener secondClickListener;
        View v1, v2;

        public DialogHolder(View itemView) {
            super(itemView);
            v1 = itemView.findViewById(R.id.v1);
            v2 = itemView.findViewById(R.id.v2);
            firstClickListener = new FirstClickListener();
            secondClickListener = new SecondClickListener();

            v1.setOnClickListener(firstClickListener);
            v2.setOnClickListener(secondClickListener);
        }
    }
}

當你有一個介面卡例項時，你可以設定你的點選監聽器，它監聽點選每個檢視：

customAdapter.setClickInterface(new CustomAdapter.ClickInterface {
    @Override
    public void clickEventOne(Object obj) {
        // Your implementation here
    }
    @Override
    public void clickEventTwo(Object obj1, Object obj2) {
        // Your implementation here
    }
});