Question

我已将Recyclerview与swipe to delete undo library一起使用。它工作正常，但回收站视图项目选择不起作用。我试图改变所选列表项的背景颜色。但它不起作用。如何正确显示所选项目而不影响滑动删除选项？我在下面的代码中犯了什么错误？

MyActivity.java：

    myListAdapter = new MyListAdapter(this,null);

    mRecyclerView.setAdapter(myListAdapter);

    final SwipeToDismissTouchListener touchListener = new SwipeToDismissTouchListener( new RecyclerViewAdapter(mRecyclerView),new SwipeToDismissTouchListener.DismissCallbacks() {
        @Override
        public boolean canDismiss(int position) {
            return true;
        }

        @Override
        public void onDismiss(ViewAdapter viewAdapter, int position) {
            //mRecyclerView.removeViewAt(position);
        }
    });

    mRecyclerView.setOnTouchListener(touchListener);

    // Setting this scroll listener is required to ensure that during ListView scrolling,
    // we don't look for swipes.
    mRecyclerView.setOnScrollListener((RecyclerView.OnScrollListener) touchListener.makeScrollListener());

    //mRecyclerView.setActivated(true);

    //mRecyclerView.setBackgroundResource(R.drawable.list_selector);

    mRecyclerView.addOnItemTouchListener(new SwipeableItemClickListener(this,new com.hudomju.swipe.OnItemClickListener() {
        @Override
        public void onItemClick(View view, int position) {
            Log.i(TAG, "selected  position -> " + position);

            view.setActivated(true);
            view.setEnabled(true);
            view.setSelected(true);
            view.setPressed(true);

            //view.setBackgroundColor(R.drawable.list_selector);


            if(view.getId() == R.id.list_item_backside_delete_button){

                // done operations on delete button click    

                touchListener.processPendingDismisses();
            }
            else if(view.getId() == R.id.list_item_backside_cancel_button){

                // done operations on cancel button click    

                touchListener.undoPendingDismiss();
            }
        }
    }));

MyListAdapter.java：

public class MyListAdapter extends CursorRecyclerViewAdapter<MyListAdapter.ViewHolder>{

    public MyListAdapter(Context context,Cursor cursor){
        super(context,cursor);
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public TextView mTextView1;

        public ViewHolder(View view) {
            super(view);
            mTextView1 = (TextView) view.findViewById(R.id.textview_name);

            /*view.setOnClickListener(new View.OnClickListener(){

                @Override
                public void onClick(View v) {

                }
            });*/

        }


    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.list_item_view, parent, false);
        ViewHolder vh = new ViewHolder(itemView);
        return vh;
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, Cursor cursor) {
        if(cursor != null && cursor.getCount() > 0){
            String selectedID = cursor.getString(cursor.getColumnIndex(DBContract.Data._ID));
            String name = cursor.getString(cursor.getColumnIndex(DBContract.Data.COLUMN_NAME_NAME));
            viewHolder.mTextView1.setText(name);
        }


    }
}

list_item_view.xml：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="20dp"
    android:paddingRight="20dp"
    android:background="@drawable/list_selector"
    >

</FrameLayout>

list_selector.xml：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_activated="false" android:drawable="@android:color/transparent" />
    <item android:state_activated="true" android:drawable="@color/accent" />

    <item
        android:drawable="@android:color/transparent" />
</selector>

Answer 1

使全局变量存储位置并在ViewHolder中处理单击侦听器。单击项目，更改全局位置值，如

find dir/ -type f -print0 | xargs --null file --mime-type -b | wc -l

然后在onBindViewHolder

textView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    globalPosition=getAdapterPosition();
                    notifyDataSetChanged();
                }
            });

使用此代码，您单击的项目将显示为红色，而其他所有项目均为白色

Recyclerview选中的项目突出显示不起作用

1 个答案: