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传递RecyclerView CardView单击项目数据到活动

本文介绍了传递RecyclerView CardView单击项目数据到活动的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个关于将点击的cardview数据传递给活动的问题，这里有完整的故事：

I have a question about passing clicked cardview data to activity, and here the full story :


  1. 我有一个活动名为详细信息，其中包含2个TextViews的布局，标题&说明。

  1. I have an Activity called "Details", which contains 2 TextViews in it's layout, Title & Description .

我设置了一个片段（tab_1），其中包含recyclerview代码和项目数据，每个项目包含：title&描述。

I have setup a fragment ( tab_1 ) which contain the recyclerview codes and the the items data, each item of those contain : title & description .

我想要的是什么：

当用户单击该项目，它将打开详细信息活动，并更改详细信息布局标题，单击项目标题，以及相同的描述。

When the user click the item, it will open the Details Activity, and change Details layout title, with clicked item title, and the same for description .

我已经创建了另一个活动作为一个例子，并打算启动它，加上添加addOnTouchlistener感谢Stackoverflow，我找到了实现它的方法。

I've manged to create the other activity as an example, and made intent to start it, plus adding "addOnTouchlistener" thanks to Stackoverflow, i've found the way to make it .

所以，如何让这个活着？我已经在Stackoverflow上尝试了许多可用答案的方法，但所有这些方法都不起作用，或与我的请求无关。

So, how to make this alive? I've tried many ways of the available answers on Stackoverflow, but all of them not working, or not related to my request .

以下是我的文件：

itemsdata.java：

itemsdata.java :

public class itemsdata {
int CatPic;
String title;
String Descr;
int Exapnd;
int expand_no;

tab_1.java（片段）

tab_1.java ( fragment ) 

public class tab_1 extends Fragment implements SearchView.OnQueryTextListener {

private RecyclerView mRecyclerView;
public RecyclingViewAdapter adapter;
private Activity context;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View layout = inflater.inflate(R.layout.tab_1, container, false);
    mRecyclerView = (RecyclerView)layout.findViewById(R.id.recycler_view);
    mRecyclerView.addOnItemTouchListener(new RecyclerItemClickListener
            (getContext(), new RecyclerItemClickListener.OnItemClickListener() {

                @Override
                public void onItemClick(View view, int position) {
                    Intent i = new Intent(view.getContext(), DetailsActivity.class);
                    view.getContext().startActivity(i);
                }
            }));
    mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
    adapter = new RecyclingViewAdapter(getActivity(),Listed());
    mRecyclerView.setAdapter(adapter);
    return layout;

}


@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.main, menu);

    final MenuItem item = menu.findItem(R.id.action_search);
    final SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
    searchView.setOnQueryTextListener(this);
}

@Override
public boolean onQueryTextChange(String query) {
    final List<itemsdata> filteredModelList = filter(Listed(), query);
    adapter.animateTo(filteredModelList);
    mRecyclerView.scrollToPosition(0);
    return true;
}

@Override
public boolean onQueryTextSubmit(String query) {
    return true;
}

private List<itemsdata> filter(List<itemsdata> models, String query) {
    query = query.toLowerCase();

    final List<itemsdata> filteredModelList = new ArrayList<>();
    for (itemsdata model : models) {
        final String text = model.title.toLowerCase();
        if (text.contains(query)) {
            filteredModelList.add(model);
        }
    }
    return filteredModelList;
}

public List<itemsdata> Listed()
{
    //Titles Strings
    String sys_title1 = getString(R.string.system_item_title_1);
    String sys_title2 = getString(R.string.system_item_title_2);
    String sys_title3 = getString(R.string.system_item_title_3);

    //Description Strings
    String sys_descr1 = getString(R.string.system_item_desc_1);
    String sys_descr2 = getString(R.string.system_item_desc_2);
    String sys_descr3 = getString(R.string.system_item_desc_3);

    //Adding New Cards
    List<itemsdata> data = new ArrayList<>();

    //Categories Icons New Items ** Make It The Same
    int[] icons = {
            R.drawable.facebook_icon ,
            R.drawable.twitter_icon ,
            R.drawable.twitter_icon
    };

    //Expand Button New Items
    int[] expandbutton = {
            R.drawable.expanded ,
            R.drawable.expanded ,
            R.drawable.expanded
    };

    //UnExpand Button New Items
    int[] unexpandbutton = {
            R.drawable.ca_expand ,
            R.drawable.ca_expand ,
            R.drawable.ca_expand
    };

    //Titles New Items
    String[] titles = {
            sys_title1 ,
            sys_title2 ,
            sys_title3
    };

    //Description New Items
    String[] Description = {
            sys_descr1 ,
            sys_descr2 ,
            sys_descr3
    };


    for(int i = 0;i<titles.length && i < icons.length  && i < Description.length && i < unexpandbutton.length && i < expandbutton.length  ; i++)
    {
        itemsdata current = new itemsdata();
        current.CatPic = icons[i];
        current.title = titles[i];
        current.Descr = Description[i];
        current.expand_no = unexpandbutton[i];
        current.Exapnd = expandbutton[i];
        data.add(current);
    }
    return data;
}

}

详情活动：

public class DetailsActivity extends AppCompatActivity{

TextView title;

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.details);
    title = (TextView)findViewById(R.id.details_title);
}

编辑：我已经做到了，我已经添加了一个打开的按钮片段，并传递数据，在适配器，但我想通过tab_1.java，而不是适配器，我的意思是我想点击项目打开片段，而不是按钮，这里从我的适配器代码快照（我已经在OnBindViewHolder中添加了它）

EDIT : I've made it, i have added a button which open the fragment, and passed the data, in the Adapter, but i want it via tab_1.java, not the Adapter, i mean i want to click on the item to open the fragment, not on a button, here a snap from my Adapter code ( i've added it in OnBindViewHolder )

我已经设置了OnClick并实现了Vew.setOnClick ..etc，但是当我点击该项目时，没有任何反应。

I've setup a OnClick and implemented the Vew.setOnClick ..etc, but when i click the item, nothing happen.

 @Override
public void onBindViewHolder(final MyRecycleViewHolder holder, int position) {

    holder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent i = new Intent(v.getContext(),DetailsActivity.class);
            v.getContext().startActivity(i);
        }
    });

    //Referencing Data
    final itemsdata currentobject = mdata.get(position);
    //Referencing Items
    holder.ProbTitle.setText(currentobject.title);
    holder.ProbDescr.setText(currentobject.Descr);
    holder.CategoryPic.setImageResource(currentobject.CatPic);
    holder.ExpandButton.setImageResource(currentobject.Exapnd);
    holder.ExpandNoButton.setImageResource(currentobject.expand_no);
        //What Happen When You Click Expand Button .
    holder.ExpandButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent i = new Intent(v.getContext(), DetailsActivity.class);
            i.putExtra("TitleKey",holder.ProbTitle.getText().toString());
            v.getContext().startActivity(i);
            }
        }
    );

public static class MyRecycleViewHolder extends RecyclerView.ViewHolder
{



    SwipeLayout swipeLayout;
    //Defining Items .
    TextView ProbTitle;
    ImageButton ExpandButton;
    TextView ProbDescr;
    ImageButton ExpandNoButton;
    ImageView CategoryPic;
    /*
    TextView Card_Star;
    TextView Card_UnStar;
    */
    TextView Card_Share;

    //Referencing Resources
    public MyRecycleViewHolder(final View itemView) {
        super(itemView);
        ProbTitle = (TextView) itemView.findViewById(R.id.prob_title);
        CategoryPic = (ImageView) itemView.findViewById(R.id.cat_pic);
        ProbDescr = (TextView) itemView.findViewById(R.id.prob_descr);
        ExpandButton = (ImageButton) itemView.findViewById(R.id.expand_button);
        ExpandNoButton = (ImageButton) itemView.findViewById(R.id.expand_no_button);
        /*
        Card_Star = (TextView) itemView.findViewById(R.id.card_star);
        Card_UnStar = (TextView) itemView.findViewById(R.id.card_unstar);
        */
        Card_Share = (TextView) itemView.findViewById(R.id.card_share);
        swipeLayout = (SwipeLayout) itemView.findViewById(R.id.swipe);

    }


推荐答案

创建一个包含方法的适配器内的接口。在实现适配器时，这些方法将在您的活动中实现，您可以执行任何您想要的操作。

create an Interface inside your adapter containing methods. And while implementing your Adapter, those methods will be implemented in your activity and you can perform whatever action you want.

    public class Adapter extends RecyclerView.Adapter<MyRecycleViewHolder> {

    public interface Callbacks {
        public void onButtonClicked(String titleKey);
    }

    private Callbacks mCallbacks;

    public Adapter() {

    }

    @Override
    public MyRecycleViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.layout_details, null);
        return new MyRecycleViewHolder(v);
    }

    @Override
    public void onBindViewHolder(final MyRecycleViewHolder holder, final int i) {

        holder.ExpandButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mCallbacks != null) {
                    mCallbacks.onButtonClicked(holder.ProbTitle.getText().toString());
                }
            }
        });

    }


    @Override
    public int getItemCount() {
        return;
    }

    public void setCallbacks(Callbacks callbacks) {
        this.mCallbacks = callbacks;
    }
}

这篇关于传递RecyclerView CardView单击项目数据到活动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

09-02 02:02
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