Question

我正在创建一个使用RecyclerView填充动态按钮和字符串的GridLayout。每个按钮和字符串一次一个地添加到视图中，每次添加一个按钮和字符串时，我想将动态字符串发送到我的按钮onClick in RecyclerViewHolder 。

我试着用这个问题作为指导：

how to send data using bundle inside RecyclerView onclick method

但他们有一组字符串和drawables发送到他们的RecyclerView.ViewHolder，而我的动态创建。这是我所在的地方，任何帮助将不胜感激！

RecyclerView.ViewHolder我想将我的字符串发送到onClick。在我的日志中，我想看到我点击弹出的按钮的名称。

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

public TextView AName;
public ImageButton AButton;
ItemObject itemObject;
List<ItemObject> namelist=HomeFragment.getListdata();


public RecyclerViewHolders(View itemView) {
    super(itemView);
    AName = (TextView) itemView.findViewById(R.id.new_name);
    AButton = (ImageButton) itemView.findViewById(R.id.new_button);
    itemView.findViewById(R.id.new_button).setOnClickListener(this);
}


public void onClick(View view) {

    String name = namelist.get(getAdapterPosition()).getName();
    Log.d("tag_name", "Name of button that was clicked" + name);
}
}

我的Activity启动RecyclerView，我试图从中发送字符串。＆＃34; createButton＆＃34; method是drawable和string首先从另一个方法发送到的地方：

public class HomeFragment extends Fragment {

private GridLayoutManager lLayout;

RecyclerViewAdapter rcAdapter;
private static Context mContext;

static String Name;
static Drawable draw;

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

    mContext = getContext();

    List<ItemObject> myList = new ArrayList<>();
    rcAdapter = new RecyclerViewAdapter(getActivity(), myList);

}

// onCreateView
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.home_fragment, container, false);


    Log.d("tag_name", "Go through onCreateView");

    lLayout = new GridLayoutManager(getActivity(), 2,
            GridLayoutManager.HORIZONTAL, false);

    RecyclerView rView = (RecyclerView) view.findViewById(R.id.recycler_view);

    rView.setHasFixedSize(true);
    rView.setLayoutManager(lLayout);
    rView.setAdapter(rcAdapter);


    return view;
}


public void createButton(Drawable d, String aName) {

    Name = aName;
    draw = d;

    Log.d("tag_name", "Make sure createButton is called" + rcAdapter);
    rcAdapter.addItem(new ItemObject(aName, d));
}



public static List<ItemObject> getListdata() {
    Log.d("tag_name", "List to send to onClickListener" + Name);
    List<ItemObject> namelist = new ArrayList<>();
    namelist.add(new ItemObject(Name,draw));
    return namelist;
}
}

和ItemObject：

public class ItemObject {

private String name;
private Drawable d;

public ItemObject(String name, Drawable d) {
    this.name = name;
    this.d = d;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public Drawable getPhoto() {
    return d;
}

public void setPhoto(Drawable d) {
    this.d = d;
}
}

我当前的错误，发生在RecyclerViewHolders中，我在其中定义＆＃34;字符串名称＆＃34;：

05-24 14:12:53.350 7295-7295/it.anddev.bradipao.janus W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x437c0160)
05-24 14:12:53.360 7295-7295/it.anddev.bradipao.janus E/AndroidRuntime: FATAL EXCEPTION: main
                                                                    Process: it.anddev.bradipao.janus, PID: 7295
                                                                    java.lang.IndexOutOfBoundsException: Invalid index 1, size is 1
                                                                        at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
                                                                        at java.util.ArrayList.get(ArrayList.java:308)
                                                                        at it.anddev.bradipao.janus.RecyclerViewHolders.onClick(RecyclerViewHolders.java:50)
                                                                        at android.view.View.performClick(View.java:4487)
                                                                        at android.view.View$PerformClick.run(View.java:18746)
                                                                        at android.os.Handler.handleCallback(Handler.java:733)
                                                                        at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                        at android.os.Looper.loop(Looper.java:149)
                                                                        at android.app.ActivityThread.main(ActivityThread.java:5257)
                                                                        at java.lang.reflect.Method.invokeNative(Native Method)
                                                                        at java.lang.reflect.Method.invoke(Method.java:515)
                                                                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:788)
                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:604)
                                                                        at dalvik.system.NativeStart.main(Native Method)

Answer 1

向OnClickListener实施Fragment，并将构造函数传递给Adapter，然后传递给每个RecyclerViewHolder

您知道保留static Drawable和Name会在您添加的每个片段中产生相同的绘图和名称吗？（最后一组）

Answer 2

看起来getAdapterPosition()返回的值大于namelist的长度（它只是一个项目）。试着解决这个问题。

Answer 3

我找到了一个帮助我解决这个问题的链接，尽管我的解决方案略有不同。对于可能有同样问题的其他人。

Passing data on click in RecyclerView.Adapter

提醒我想要完成的事情：＆＃34;我想看到我点击的按钮的名称弹出。＆＃34;因此，每个按钮单击都将是唯一的，我指定了按钮的名称。

我意识到我可以访问我的点击位置和与RecyclerViewAdapter中的点击相关联的字符串，并将我的onClickListener附加到RecyclerViewHolder。通过将我的字符串列表发送到RecyclerViewHolder，这使得解决方案比我尝试的方式更简单。

所以，在我的RecyclerViewAdapter中，我在自定义方法中创建了一个onClickListener：

private class downloadOnClickListener implements View.OnClickListener{

    String aName;

    public downloadOnClickListener(String file){
        this.aName = file;
    }

    @Override
    public void onClick(View v) {

        Log.d("tag_name", "Name of button being pressed" + aName);

    }
}

在onBindViewHolder中，我将侦听器附加到RecyclerHolder

 @Override
public void onBindViewHolder(RecyclerViewHolders holder, int position) {
    ItemObject itemObject = itemList.get(position);
    holder.itemObject = itemObject;
    holder.AButton.setOnClickListener(new downloadOnClickListener(itemList.get(position).getName()));
}

在RecyclerViewHolder

3 个答案: