example of recyclerview with click detail

adapter.java

package be.charlesvdv.weatherreport;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.ArrayList;

public class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.ItemAdapterViewHolder> {
    private static String TAG = ItemAdapter.class.getSimpleName();
    private ArrayList<WeatherData> weatherData;

    private ItemAdapterOnClickHandler clickHandler;

    public ItemAdapter(ItemAdapterOnClickHandler clickHandler) {
        this.clickHandler = clickHandler;
        this.weatherData = new ArrayList<>();
    }

    public interface ItemAdapterOnClickHandler {
        void onClick(WeatherData weatherData);
    }

    public void setChangedData(ArrayList<WeatherData> data) {
        Log.d(TAG, "Data changed!");
        this.weatherData = data;
        notifyDataSetChanged();
    }

    public class ItemAdapterViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        public final TextView timeTextView;

        public ItemAdapterViewHolder(View view) {
            super(view);
            timeTextView = (TextView) view.findViewById(R.id.weather_item_time);
            timeTextView.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            int adapterPos = getAdapterPosition();
            clickHandler.onClick(weatherData.get(adapterPos));
        }
    }

    @Override
    public ItemAdapterViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        Context context = parent.getContext();
        LayoutInflater inflater = LayoutInflater.from(context);

        View view = inflater.inflate(R.layout.weather_item, parent, false);
        Log.d(TAG, "ItemAdapterViewHolder initializing");
        return new ItemAdapterViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ItemAdapterViewHolder holder, int pos) {
        holder.timeTextView.setText(weatherData.get(pos).getTime() + "");
    }

    @Override
    public int getItemCount() {
        if (weatherData.isEmpty()) return 0;
        return weatherData.size();
    }


}

WeatherActivity.java

package be.charlesvdv.weatherreport;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

import org.w3c.dom.Text;

public class WeatherActivity extends AppCompatActivity {

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

        Intent intent = getIntent();
        WeatherData weatherData = (WeatherData) intent.getSerializableExtra("weather-data");

        TextView tempDayTextView = (TextView) this.findViewById(R.id.weather_item_tempday);
        TextView humidityTextView = (TextView) this.findViewById(R.id.weather_item_humidity);
        TextView pressureTextView = (TextView) this.findViewById(R.id.weather_item_pressure);

        tempDayTextView.setText(weatherData.getDayTemp() + "");
        humidityTextView.setText(weatherData.getHumidity() + "");
        pressureTextView.setText(weatherData.getPressure() + "");
    }
}

WeatherListActivity.java

package be.charlesvdv.weatherreport;

import android.app.LoaderManager;
import android.content.AsyncTaskLoader;
import android.content.Intent;
import android.content.Loader;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;

import org.json.JSONException;

import java.util.ArrayList;

public class WeatherListActivity extends AppCompatActivity
        implements ItemAdapter.ItemAdapterOnClickHandler, LoaderManager.LoaderCallbacks<ArrayList<WeatherData>> {
    private static String TAG = WeatherHandler.class.getSimpleName();
    private static final int LOADER_MANAGER_ID = 22;

    private RecyclerView recyclerView;
    private ItemAdapter itemAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.d(TAG, "test");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_weather_list);

        recyclerView = (RecyclerView) findViewById(R.id.weather_items);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL,
                false);
        recyclerView.setLayoutManager(layoutManager);
        recyclerView.setHasFixedSize(true);

        itemAdapter = new ItemAdapter(this);
        recyclerView.setAdapter(itemAdapter);

        Bundle b = new Bundle();
        b.putString("URL", "https://andfun-weather.udacity.com/weather");
        getLoaderManager().initLoader(LOADER_MANAGER_ID, b, this).forceLoad();

        Log.d(TAG, "Starting the WeatherHandler");
    }

    @Override
    public void onClick(WeatherData data) {
        Intent intent = new Intent(this, WeatherActivity.class);
        intent.putExtra("weather-data", data);
        startActivity(intent);
    }

    @Override
    public Loader<ArrayList<WeatherData>> onCreateLoader(int id, final Bundle args) {
        return new AsyncTaskLoader<ArrayList<WeatherData>>(this) {
            ArrayList<WeatherData> data;

            @Override
            protected void onStartLoading() {
                if (data != null) {
                    deliverResult(data);
                } else {
                    forceLoad();
                }
            }

            @Override
            public ArrayList<WeatherData> loadInBackground() {
                String url = args.getString("URL");
                try {
                    String result = NetworkHandler.getJSONFromUrl(url);
                    Log.d(TAG, "Data downloaded");
                    return WeatherHandler.parseWeatherData(result);
                } catch (NetworkWeatherException e) {
                    e.printStackTrace();
                } catch (JSONException e) {
                    e.printStackTrace();
                }
                Log.d(TAG, "Fail to download");
                return null;
            }

            @Override
            public void deliverResult(ArrayList<WeatherData> data) {
                this.data = data;
                super.deliverResult(data);
            }
        };
    }

    @Override
    public void onLoadFinished(Loader<ArrayList<WeatherData>> loader, ArrayList<WeatherData> data) {
        if (data.size() == 0 || data == null) {
            Log.e(TAG, "Unable to fetch the data");
        }
        Log.d(TAG, "Setting changed data");
        itemAdapter.setChangedData(data);
    }

    @Override
    public void onLoaderReset(Loader<ArrayList<WeatherData>> loader) {

    }
}