java - RecyclerView onClick 获取项目的位置

Question

我有一个 RecyclerView，它包含一堆卡片(从网络获取数据，然后填充卡片)。获取数据后，我的卡片可以正确形成，但现在我希望在单击每张卡片时设置一个监听器。理想情况下，在每张卡片被点击 后，一个新的intent 将被调用，其中包含有关该卡片数据的更多详细信息。

这是我初始化适配器的地方。 arrList 是一个 ArrayList 已经从另一个类中填充了

private void initializeAdapter() {
    RecycleViewAdapter adapter = new RecycleViewAdapter(arrList);
    rv.setAdapter(adapter);
    }

这是另一个持有卡片的类:

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

        CardView cv;
        TextView crimeName,crimeID, crimeAddress, crimeDate, crimeWeapon;
        ImageView crimePhoto;

        PersonViewHolder(View itemView) {
            super(itemView);
            cv = (CardView)itemView.findViewById(R.id.cv);

            crimeName = (TextView) itemView.findViewById(R.id.crime_name);
            crimeID = (TextView) itemView.findViewById(R.id.crime_id);
            crimeAddress = (TextView) itemView.findViewById(R.id.crime_address);
            crimeDate = (TextView) itemView.findViewById(R.id.crime_date);
            crimeWeapon = (TextView) itemView.findViewById(R.id.crime_weapon);
            crimePhoto = (ImageView)itemView.findViewById(R.id.crime_photo);

            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {
            // WHAT DO I CALL HERE TO GET THE INDEX OF THE ITEM CLICKED ON ?? //
            Log.d("app", "clicked");

        }
    }

上面的 onClick 应该转到这个类(通过 Intent )并传递索引:

    import android.support.v4.app.Fragment;
    import android.support.v7.app.ActionBarActivity;
    import android.os.Bundle;
    import android.view.LayoutInflater;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.view.View;
    import android.view.ViewGroup;


    public class CrimeDetails extends ActionBarActivity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_crime_details);
            if (savedInstanceState == null) {
                getSupportFragmentManager().beginTransaction()
                        .add(R.id.container, new PlaceholderFragment())
                        .commit();
            }
        }


        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.crime_details, menu);
            return true;
        }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {

            View rootView = inflater.inflate(R.layout.fragment_crime_details, container, false);
            return rootView;
        }
        }
     }

如何获取卡片的点击位置？

谢谢

Answer 1

请在 onCreateVH 方法中但在 onBindViewHolder 中设置 onClickListener

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    ((PersonViewHolder)holder).yourRootLayout.setOnClickListener(getPersonClickListener(position));
}

View.OnClickListener getPersonClickListener(final int position) {
    return new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            //TODO whatever you want with position
        }
    };
}

编辑:tyczj是对的。在 onBindViewHolder 中绑定(bind) Clicklistener 是一个非常简单但可能不是最好的解决方案 - 但它会起作用!

另一种方法是使用 Viewholder 本身的 getAdapterPosition() 方法并将其绑定(bind)到 onCreateViewHolder 中:

@Override
public ViewHolder onCreateViewHolder(final ViewGroup parent, int viewType) {
    final View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.yourLayoutXml, parent, false);
    final ViewHolder holder = new PersonViewHolder(view);
    view.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            final int position = holder.getAdapterPosition();
            //check if position exists
            if (position != RecyclerView.NO_POSITION) {
                //TODO whatever you want
            }
        }
    });
    return holder;
}