处理从活动中单击列表视图的图像按钮

Question

我有一个带有播放按钮的歌曲列表视图 .. 现在我需要根据它们的位置单击此播放按钮，然后单击将选定的按钮更改为暂停按钮..但我必须在我的活动中而不是在适配器（getView）中执行此操作..有什么建议！？

  lv.setOnItemClickListener(new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
      //productList is my ArrayList<Product> and
      //Product is my Serializable class that holds
      // items that is in mysql database
      Product selectedProduct = productList.get(position);


    }
});

Answer 1

首先，使用recyclerview 而不是listview。然后，在 onBindViewHolder 方法中的适配器内部，通过向持有者添加点击侦听器来处理点击：

holder.setOnClickListener(...);

界面：

public interface OnItemClicked{
    void onItemClicked(/*HERE YOUR VARIABLES TO PASS FROM ADAPTER TO MAINACTIVITY);
}

在适配器中：

OnItemClicked listener;

public void setOnItemClickedListener(OnItemClicked listener){
    this.listener = listener;
}

向下，onBindViewHolder 方法：

@Override
public ViewHolder onBindViewHolder(... params){
    ...your code

    holder.setOnClickListener(new View.OnClickListener{
        @Override
        public void onClick(View v){
            if(listener != null)
                listener.onItemClicked()
        }
    });
}

最后，在您的 MainActivity 中：

adapter.setOnItemClickedListener(new OnItemClicked ... ) <- here will pop up autocomplete

Answer 2

在你的活动中使用它

1. 声明RecyclerView并设置LayoutManager

2. 设置适配器

view.setAdapter(mAdapter);

1. 点击执行

v

view.addOnitemTouchListener(

new RecyclerItemClickListener(getApplicationContext(), new RecyclerItemClickListener.OnItemClickListener() {

                    @Override
                    public void onItemClick(View view, int position) {

                        //do something
                    }
                })
        );

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) {

    }
}