Question

我已经搜索了一些关于如何获取在循环器视图中单击的项目的可能性，但它们似乎都不起作用。下面的代码应该工作，但我不明白为什么不。在android studio中，getPosition（）方法被划掉了。我的想法已经用完了，有没有办法我至少可以点击回收者视图的名字？

ViewHolder

.user

适配器

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

    public CardView cv;
    public TextView name;
    public TextView description;
    Context context;

    public ShoppingListViewHolder(View itemView) {
        super(itemView);
        cv = (CardView) itemView.findViewById(R.id.cardView);
        name = (TextView) itemView.findViewById(R.id.title);
        description = (TextView) itemView.findViewById(R.id.description);
        itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("RecyclerView", "onClick：" + getPosition());
            }
        });
    }


    public void bindView(int position) {

    }

    @Override
    public void onClick(View v) {
        Log.d("TAG", "onClick " + getPosition() + " " + name);
    }

日志

public class MainShoppingListViewActivity extends AppCompatActivity {

    List<Data> list = new ArrayList<>();
    RecyclerView recyclerView;
    ShoppingListViewAdapter adapter;
    Context context;
    EditText listName;
    Firebase ref;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_shoppinglist_view);

        Firebase.setAndroidContext(this);
        ref = new Firebase("https://shoppinglistshare.firebaseio.com/");

        // Getting the recycler view, using the Recycler View
        recyclerView = (RecyclerView) findViewById(R.id.shopping_list_recycler_view);
        // The setLayoutManager which contains the main container where the Recycler View is contained
        recyclerView.setLayoutManager(new LinearLayoutManager(MainShoppingListViewActivity.this));

        // Floating action bar initiated, background color is set and then onClickListener to act when the
        // button is pressed to which the createDialogBox(); method is called
        FloatingActionButton addFloat = (FloatingActionButton) findViewById(R.id.fab);
        addFloat.setBackgroundTintList(ColorStateList.valueOf(Color
                .parseColor("#3F51B5")));
        addFloat.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // Click action
                createDialogBox();
            }
        });
    }

    /*
    * This method is used to add a new item to the Recycler View
    */
    public void addNewShoppingListItem(String val) {
        ref = new Firebase("https://shoppinglistshare.firebaseio.com/");

        adapter = new ShoppingListViewAdapter(list, MainShoppingListViewActivity.this);
        recyclerView.setAdapter(adapter);

        adapter.addItem(new Data(val, "Created by: Me"));
        ref.child("List Name: ").setValue(val);
    }

    /*
     * This method is used to add a new item to the Recycler View
    */
    public void removeShoppingListItem(String val) {
        adapter = new ShoppingListViewAdapter(list, MainShoppingListViewActivity.this);
        recyclerView.setAdapter(adapter);

        adapter.addItem(new Data(val, "Created by: Me"));
    }

    /*
     * This method is called inside the float action bar to create a dialog box when the floating action button is pressed.
    */
    public void createDialogBox() {

        // Alert Dialog Builder
        AlertDialog.Builder builder = new AlertDialog.Builder(this);

        // Using Layout Inflater class and assigned to a variable and using getLayout
        LayoutInflater inflater = this.getLayoutInflater();

        // Inflate and set the layout for the dialog
        // Pass null as the parent view because its going in the dialog layout.
        // Using the view class to inflate the layout.
        View rootView = inflater.inflate(R.layout.custom_alert_dialog, null);
        listName = (EditText) rootView.findViewById(R.id.ShoppinglistName);

        // Using the AlertDialog Builder created above as "builder" to set the view.
        builder.setView(rootView)
                .setPositiveButton("Create", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        String val = listName.getText().toString();
                        if (!val.isEmpty()) {
                            addNewShoppingListItem(val);
                        } else {
                            Toast.makeText(MainShoppingListViewActivity.this, "Please enter a value", Toast.LENGTH_SHORT).show();
                        }
                    }
                })
                // Show the dialog
                .show();
    }
}

Answer 1

做了一些小改动，这是我得到的解决方案。我将把onClick改为另一种方法而不是它的位置。如果对如何使代码更好有任何建议请告诉我，任何建议都非常感谢:)

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

public CardView cv;
public TextView name;
public TextView description;
Context context;

public ShoppingListViewHolder(View itemView) {
    super(itemView);
    cv = (CardView) itemView.findViewById(R.id.cardView);
    name = (TextView) itemView.findViewById(R.id.title);
    description = (TextView) itemView.findViewById(R.id.description);
    itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Data test = new Data(name.getText().toString(), description.getText().toString());
            Toast.makeText(v.getContext(), "onClick " +  test.getName(), Toast.LENGTH_SHORT).show();
            Log.d("RecyclerView", "onClick is this：" + getAdapterPosition());
        }
    });
}

@Override
public void onClick(View v) {
    Toast.makeText(context, "onClick " + getAdapterPosition() + " " + name, Toast.LENGTH_SHORT).show();
}

}

Answer 2

有几种方法可以做到。就个人而言，我喜欢在适配器类内部的onBindViewHolder中设置监听器（无论你有什么视图）：

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

   holder.YourTargetObject.setOnClickListener(new View.onClickListener(){
      public void onClick(View view){
       //do something
      }
   });

}

Recycler查看项目onClick

2 个答案: