java - 单击 RecyclerView 中属于 CardView 的 ImageButton

Question

已解决

我已经解决了混合您的答案的问题，所以我决定在这里写下来。

关键是ViewHolder构造函数:

我已经删除了 setOnClickListener()和 onClick()方法，我在我的 ObjectAdapter.java 中定义了这个内部类.

public static class ViewHolder extends RecyclerView.ViewHolder{

     public ViewHolder(View itemView) {
            super(itemView);
            card_first_btn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    int position = getAdapterPosition();
                    Toast.makeText(v.getContext(), object.get(position).getName(), Toast.LENGTH_SHORT).show();
                }
            });
            card_second_btn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(v.getContext(), "Forward button", Toast.LENGTH_SHORT).show();
                }
            });
     }
}

仅此而已。类(class)的其余部分是一样的。

ObjectFragment.java是:

public class ObjectFragment extends Fragment {

    public void ObjectFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater layoutInflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this Fragment
        return layoutInflater.inflate(R.layout.fragment_object, container, false);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        final ArrayList<Object> objects = initializeList();

        if(!objects.isEmpty()) {   
            RecyclerView recyclerView = (RecyclerView) getActivity().findViewById(R.id.objects_recyclerView);
            recyclerView.setHasFixedSize(true);
            recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
            recyclerView.setItemAnimator(new DefaultItemAnimator());
            recyclerView.addItemDecoration(new SimpleDivider(getActivity().getApplicationContext()));

            final ObjectAdapter objectAdapter = new ObjectAdapter(objects, R.layout.card_object);    
            recyclerView.setAdapter(objectAdapter);
        }
    }

    private ArrayList<Object> initializeList() {
        ArrayList<Object> objects= new ArrayList<>();    
        objects.add(new Object(...));    
        return objects;
    }
}

非常感谢你们。

---

原始问题

我有一个 RecyclerView其中包含一些 CardViews .这CardViews有两个不同的ImageButton当您点击它们时，它们会产生不同的效果(显而易见)。

这是 card_object.xml

<android.support.v7.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/object_card"
    card_view:cardCornerRadius="2dp"
    card_view:cardElevation="2dp"
    card_view:cardBackgroundColor="@color/colorPrimary"
    android:clickable="true">

    <LinearLayout
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:orientation="vertical"
        android:background="@color/colorPrimary">

        <ImageButton
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/object_card_first_button"
                android:src="@drawable/contact_100px"
                android:maxHeight="25dp"
                android:maxWidth="25dp"
                android:adjustViewBounds="true"
                android:scaleType="centerCrop"
                android:background="@color/transparentBackgroundPrimary"
                android:layout_marginRight="54dp"
                android:layout_marginEnd="54dp"/>

        <ImageButton
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:src="@drawable/forward_100px"
                android:maxHeight="25dp"
                android:maxWidth="25dp"
                android:adjustViewBounds="true"
                android:scaleType="centerCrop"
                android:background="@color/transparentBackgroundPrimary"
                android:id="@+id/object_card_second_button" />
    </LinearLayout>
</android.support.v7.widget.CardView>

这是我的 ObjectAdapter.java 的主要代码:

public class ObjectAdapter 
        extends RecyclerView.Adapter<ObjectAdapter.ViewHolder> 
        implements View.OnClickListener {

    private ArrayList<Object> objects;
    private int itemLayout;
    private View.OnClickListener onClickListener;

    public ObjectAdapter(ArrayList<Object> objects, int itemLayout) {
        this.objects = objects;
        this.itemLayout = itemLayout;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(viewGroup.getContext())
                .inflate(itemLayout, viewGroup, false);

        view.setOnClickListener(this);

        return new ViewHolder(view);
    }

    public void setOnClickListener(View.OnClickListener listener) {
        this.onClickListener = listener;
    }

    public void onClick(View view) {
        if(onClickListener != null) {
        onClickListener.onClick(view);
    } 
}

我的 ObjectFragment.java是下一个:

public class ObjectFragment extends Fragment {

    public void ObjectFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater layoutInflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this Fragment
        return layoutInflater.inflate(R.layout.fragment_object, container, false);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        final ArrayList<Object> objects = initializeList();

        if(!objects.isEmpty()) {   
            RecyclerView recyclerView = (RecyclerView) getActivity().findViewById(R.id.objects_recyclerView);
            recyclerView.setHasFixedSize(true);
            recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
            recyclerView.setItemAnimator(new DefaultItemAnimator());
            recyclerView.addItemDecoration(new SimpleDivider(getActivity().getApplicationContext()));

            final ObjectAdapter objectAdapter = new ObjectAdapter(objects, R.layout.card_object);
            objectAdapter.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    // Here I can manage my Object attributes,
                    // but no the ImageButtons itselves
                }
            });

            recyclerView.setAdapter(objectAdapter);
        }
    }

    private ArrayList<Object> initializeList() {
        ArrayList<Object> objects= new ArrayList<>();    
        objects.add(new Object(...));    
        return objects;
    }
}

我可以获得 Object 的值属性(名称、标题等)，然后单击 CardView等等，但我无法将其设为 ImageButton有自己的onClick。

我不知道是否使用 android:onClick()可以显示特定卡的信息，但这是另一回事。

所以我的问题是如何让这两个按钮拥有自己的 OnClickListener , 我应该在哪里声明它以及如何处理 RecyclerView 的每个项目的信息之后(这部分就差不多实现了)。

有什么想法吗？非常感谢!

Answer 1

您可以像这样在 ViewHolder 类中添加按钮事件点击。

public class RecyclerViewHolders extends RecyclerView.ViewHolder implements View.OnClickListener{

public ButtonImage firstButton;
public ButtonImage secondButton;

public RecyclerViewHolders(View itemView) {
    super(itemView);
    itemView.setOnClickListener(this);
    firstButton = (ImageButton)itemView.findViewById(R.id.object_card_first_button);
    firstButton = (ImageButton)itemView.findViewById(R.id.object_card_second_button);
}

@Override
public void onClick(View view) {
 int id = view.getId();
 switch (id){
       case R.id.object_card_first_button:
       // button event
       break;
       case R.id.object_card_second_button
       // button event
       break;

 }

}