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Android Android Lists and Adapters (2015) Lists with RecyclerViews Using a Layout Manager

Dhruv Patel
Dhruv Patel
8,287 Points

@InjectView in HourAdapter

Is it possible for me to use @InjectView in my HourAdapter.HourViewHolder and if it is then where would I go about to add the ButterKnife.inject(this) call

3 Answers

Kourosh Raeen
Kourosh Raeen
23,732 Points

Yes, it is. Call ButterKnife.inject(this, itemView) inside the HourViewHolder constructor, where all the findViewById calls are. Here's the code:

package com.teamtreehouse.stormy.adapters;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.teamtreehouse.stormy.R;
import com.teamtreehouse.stormy.weather.Hour;

import butterknife.ButterKnife;
import butterknife.InjectView;

 * Created by Kourosh on 7/21/2015.
public class HourAdapter extends RecyclerView.Adapter<HourAdapter.HourViewHolder> {

    private Hour[] mHours;
    private Context mContext;

    public HourAdapter(Context context, Hour[] hours) {
        mContext = context;
        mHours = hours;

    public HourViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.hourly_list_item, parent, false);
        HourViewHolder hourViewHolder = new HourViewHolder(view);

        return hourViewHolder;

    public void onBindViewHolder(HourViewHolder holder, int position) {

    public int getItemCount() {
        return mHours.length;

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

        //public TextView mTimeLabel;
        //public TextView mSummaryLabel;
        //public TextView mTemperatureLabel;
        //public ImageView mIconImageView;

        TextView mTimeLabel;
        TextView mSummaryLabel;
        TextView mTemperatureLabel;
        ImageView mIconImageView;

        public HourViewHolder(View itemView) {

            //mTimeLabel = (TextView) itemView.findViewById(R.id.timeLabel);
            //mSummaryLabel = (TextView) itemView.findViewById(R.id.summaryLabel);
            //mTemperatureLabel = (TextView) itemView.findViewById(R.id.temperatureLabel);
            //mIconImageView = (ImageView) itemView.findViewById(R.id.iconImageView);

            ButterKnife.inject(this, itemView);


        public void bindHour(Hour hour) {
            mTemperatureLabel.setText(hour.getTemperature() + "");

        public void onClick(View v) {
            String time = mTimeLabel.getText().toString();
            String temperature = mTemperatureLabel.getText().toString();
            String summary = mSummaryLabel.getText().toString();
            String message = String.format("At %s it will be %s and %s",
            Toast.makeText(mContext, message, Toast.LENGTH_LONG).show();
Peter Corletto
Peter Corletto
2,682 Points

It is not @InjectView anymore. It is now @Bind. Also, use ButterKnife.bind(this)

Kourosh Raeen
Kourosh Raeen
23,732 Points

Hi Peter - @Bind is for a newer version of the Butterknife library. The one used for this course is an older version that uses @InjectView.

Peter Corletto
Peter Corletto
2,682 Points

Oh good to know. Thank you.