Question

我想在用户点击dialog中的特定项目时显示recycler view。现在我不知道如何做到这一点，但我正在考虑使用我的主要活动中的interface。 adapter会将项目（TextView文本）传递到界面中，然后主要活动将接受参数项并显示基于它的对话框。但我不知道如何做到这一点。或者，如果有任何替代方式

RecyclerAdapter.java

public class RecyclerAdapter extends RecyclerView.Adapter {
private List<String> mDataSet = new ArrayList<>();
private LayoutInflater mInflater;
private final ViewBinderHelper binderHelper = new ViewBinderHelper();


public RecyclerAdapter(Context context, List<String> dataSet) {
    mDataSet = dataSet;
    mInflater = LayoutInflater.from(context);

    // uncomment if you want to open only one row at a time
    // binderHelper.setOpenOnlyOne(true);
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = mInflater.inflate(R.layout.row_list, parent, false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder h, int position) {
    final ViewHolder holder = (ViewHolder) h;

    if (mDataSet != null && 0 <= position && position < mDataSet.size()) {
        final String data = mDataSet.get(position);

        // Use ViewBindHelper to restore and save the open/close state of the SwipeRevealView
        // put an unique string id as value, can be any string which uniquely define the data
        binderHelper.bind(holder.swipeLayout, data);

        // Bind your data here
        holder.bind(data);
    }
}

@Override
public int getItemCount() {
    if (mDataSet == null)
        return 0;
    return mDataSet.size();
}

/**
 * Only if you need to restore open/close state when the orientation is changed.
 * Call this method in {@link android.app.Activity#onSaveInstanceState(Bundle)}
 */
public void saveStates(Bundle outState) {
    binderHelper.saveStates(outState);
}

/**
 * Only if you need to restore open/close state when the orientation is changed.
 * Call this method in {@link android.app.Activity#onRestoreInstanceState(Bundle)}
 */
public void restoreStates(Bundle inState) {
    binderHelper.restoreStates(inState);
}

private class ViewHolder extends RecyclerView.ViewHolder {
    private SwipeRevealLayout swipeLayout;
    private View tickOffLayout;
    private View infoLayout;
    private View displayedText;
    private TextView textView;
    private CheckBox checkBox;

    public ViewHolder(View itemView) {
        super(itemView);
        swipeLayout = (SwipeRevealLayout) itemView.findViewById(R.id.swipe_layout);
        tickOffLayout = itemView.findViewById(R.id.tickOff_layout);
        infoLayout = itemView.findViewById(R.id.info_layout);
        displayedText = itemView.findViewById(R.id.displayedItemOnRecyclerView);
        textView = (TextView) itemView.findViewById(R.id.text);
        checkBox = (CheckBox) itemView.findViewById(R.id.checkItem);
    }

    public void bind(String data) {
/*            tickOffLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(checkBox.isChecked()){
                    Log.e("Checkbox", "IS CHECKED");
                    textView.setPaintFlags(textView.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
                    tickOffLayout.setBackgroundColor(Color.parseColor("#52abff"));
                    notifyDataSetChanged();
                }else if(!checkBox.isChecked()){
                    Log.e("Checkbox", "IS UNCHECKED");
                    textView.setPaintFlags(textView.getPaintFlags() & (~ Paint.STRIKE_THRU_TEXT_FLAG));
                    tickOffLayout.setBackgroundColor(Color.parseColor("#d9d9d9"));
                    notifyDataSetChanged();
                }
            }
        });*/

        infoLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                notifyDataSetChanged();
            }
        });

        checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
                if(checkBox.isChecked()){
                    Log.e("Checkbox", "IS CHECKED");
                    textView.setPaintFlags(textView.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
                    tickOffLayout.setBackgroundColor(Color.parseColor("#52abff"));
                    displayedText.setBackgroundColor(Color.parseColor("#CCCCCC"));
                    notifyDataSetChanged();
                }else if(!checkBox.isChecked()){
                    Log.e("Checkbox", "IS UNCHECKED");
                    textView.setPaintFlags(textView.getPaintFlags() & (~ Paint.STRIKE_THRU_TEXT_FLAG));
                    tickOffLayout.setBackgroundColor(Color.parseColor("#d9d9d9"));
                    displayedText.setBackgroundResource(R.drawable.define_background);
                    notifyDataSetChanged();
                }
            }
        });
        textView.setText(data);
    }
}

}

Answer 1

以下是如何以正确的方式设置ViewHolder和ViewAdapter，并在点击时使用DialogFragment节目处理onClick：

private class SimpleTitleDataHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    /**
     * View's elements
     */
    private TextView mTitleTV;

    // Good object instance
    private String mTitle;

    // Constructor
    public SimpleTitleDataHolder(View itemView) {
        super(itemView);
        /**
         * Set elements
         */
        mTitleTV = (TextView)
                itemView.findViewById(R.id.title);
    }

    @Override
    public void onClick(View v) {
        // Do anything 
        // Show dialog
        DialogFragment dialogFragment = new DialogFragment();
        FragmentManager fm = getFragmentManager();
        dialogFragment.show(fm, "tag");
    }

    /**
     * Function to update view's elements
     * @param user Good data to be updated to
     */
    public void bindData(String title) {
        mData = title;
        mUserName.setText(title);
    }

}


private class ActiveAuctionsDataAdapter extends RecyclerView.Adapter<BaseAuctionUserDataHolder> {

    // Data list
    private List<String> mDataList;

    /**
     * Constructor, which takes list of data and assigns it to local variable
     * @param dataList
     */
    public ActiveAuctionsDataAdapter(List<String> dataList) {
        mDataList = dataList;
    }

    /**
     * Define behaviour on creation
     * @param parent Parent viewgroup
     * @param viewType Type of view
     * @return holder
     */
    @Override
    public BaseAuctionUserDataHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(getActivity());
        switch (viewType) {
            case 1:
                View itemView1 = inflater.inflate(R.layout.simple_title, parent, false);
                return new SimpleTitleDataHolder(itemView1);
        }

        return null;
    }

    /**
     * Event that happens on cell append
     * @param holder Holder to append to
     * @param position Position of the cell
     */
    @Override
    public void onBindViewHolder(BaseAuctionUserDataHolder holder, int position) {
        User data = mDataList.get(position);
        holder.bindData(data);
    }

    @Override
    public int getItemViewType(int position) {
        /** 
        * Here you can dynamically determine what layout to inflate for each element of a RCV
        */
        return 1;
    }

    /**
     * Function to get number of items in list
     * @return Number of items
     */
    @Override
    public int getItemCount() {
        return mDataList.size();
    }
}

根据使用适配器在回收站视图中的项目显示对话框

1 个答案: