{ پرشین استک }

پاسخ 1 :

کد MainActivity :

package info.androidhive.recyclerview;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity{
private List<Movie> movieList = new ArrayList<>();
private RecyclerView recyclerView;
private MoviesAdapter mAdapter;

@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
 setSupportActionBar(toolbar);

 recyclerView = (RecyclerView) findViewById(R.id.recycler_view);

 mAdapter = new MoviesAdapter(movieList);

 recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
 recyclerView.setLayoutManager(mLayoutManager);
 recyclerView.addItemDecoration(new DividerItemDecoration(this,LinearLayoutManager.VERTICAL));
 recyclerView.setItemAnimator(new DefaultItemAnimator());
 recyclerView.setAdapter(mAdapter);


 recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), recyclerView,new RecyclerTouchListener.ClickListener(){
@Override
public void onClick(View view,int position){
Movie movie = movieList.get(position);
Toast.makeText(getApplicationContext(), movie.getTitle()+" is selected!",Toast.LENGTH_SHORT).show();
}


@Override
public void onLongClick(View view,int position){
}
}));

 prepareMovieData();
}

private void prepareMovieData(){
Movie movie = new Movie("Mad Max: Fury Road","Action & Adventure","2015");
 movieList.add(movie);

 movie = new Movie("Inside Out","Animation, Kids & Family","2015");
 movieList.add(movie);

 movie = new Movie("Star Wars: Episode VII - The Force Awakens","Action","2015");
 movieList.add(movie);

 movie = new Movie("Shaun the Sheep","Animation","2015");
 movieList.add(movie);

 movie = new Movie("The Martian","Science Fiction & Fantasy","2015");
 movieList.add(movie);

 movie = new Movie("Mission: Impossible Rogue Nation","Action","2015");
 movieList.add(movie);

 movie = new Movie("Up","Animation","2009");
 movieList.add(movie);

 movie = new Movie("Star Trek","Science Fiction","2009");
 movieList.add(movie);


 movie = new Movie("The LEGO Movie","Animation","2014");
 movieList.add(movie);

 movie = new Movie("Iron Man","Action & Adventure","2008");
 movieList.add(movie);

 movie = new Movie("Aliens","Science Fiction","1986");
 movieList.add(movie);

 movie = new Movie("Chicken Run","Animation","2000");
 movieList.add(movie);

 movie = new Movie("Back to the Future","Science Fiction","1985");
 movieList.add(movie);

 movie = new Movie("Raiders of the Lost Ark","Action & Adventure","1981");
 movieList.add(movie);

 movie = new Movie("Goldfinger","Action & Adventure","1965");
 movieList.add(movie);

 movie = new Movie("Guardians of the Galaxy","Science Fiction & Fantasy","2014");
 movieList.add(movie);

 mAdapter.notifyDataSetChanged();
}

}

کد adapter :

package info.androidhive.recyclerview;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

public class MoviesAdapter extends RecyclerView.Adapter<MoviesAdapter.MyViewHolder>{

private List<Movie> moviesList;
private Movie selectedMovie;
private int lastSelectedPosition = -1;

public class MyViewHolder extends RecyclerView.ViewHolder{
public TextView title, year, genre, desc;

public MyViewHolder(View view){
super(view);
 title = (TextView) view.findViewById(R.id.title);
 genre = (TextView) view.findViewById(R.id.genre);
 year = (TextView) view.findViewById(R.id.year);
 desc = (TextView) view.findViewById(R.id.desc);
}
}

public MoviesAdapter(List<Movie> moviesList){
this.moviesList = moviesList;
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent,int viewType){
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.movie_list_row, parent,false);

return new MyViewHolder(itemView);
}

@Override
public void onBindViewHolder(MyViewHolder holder,int position){
Movie movie = moviesList.get(position);
 holder.title.setText(movie.getTitle());
 holder.genre.setText(movie.getGenre());
 holder.year.setText(movie.getYear());
 holder.desc.setText(movie.getGenre()+ movie.getGenre()+ movie.getGenre()+ movie.getGenre()+ movie.getGenre()+ movie.getGenre()+ movie.getGenre());

if (selectedMovie == movie){
 holder.itemView.setBackgroundResource(R.color.colorEmphasis);
}else{
 holder.itemView.setBackgroundResource(R.color.colorWhite);
}

final RecyclerView.ViewHolder viewHolder = holder;
 holder.itemView.setOnClickListener(newView.OnClickListener(){
@Override
public void onClick(View itemView){
int currentPosition = viewHolder.getAdapterPosition();
if (currentPosition != lastSelectedPosition){
 selectedMovie = moviesList.get(currentPosition);
 notifyItemChanged(lastSelectedPosition);
 lastSelectedPosition = currentPosition;
 notifyItemChanged(lastSelectedPosition);
}
}
});
}

@Override
public int getItemCount(){
return moviesList.size();
}
}

Row layout :

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:clickable="true"
android:background="?android:attr/selectableItemBackground"
android:orientation="vertical">

<TextView
android:id="@+id/title"
android:textColor="@color/title"
android:textSize="16dp"
android:textStyle="bold"
android:layout_alignParentTop="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<TextView
android:id="@+id/genre"
android:layout_below="@id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<TextView
android:id="@+id/year"
android:textColor="@color/year"
android:layout_width="wrap_content"
android:layout_alignParentRight="true"
android:layout_height="wrap_content"/>

<TextView
android:id="@+id/desc"
android:textColor="@color/year"
android:layout_width="match_parent"
android:layout_alignTop="@+id/genre"
android:layout_height="wrap_content"/>

</RelativeLayout>

این ویدئو می تواند به شما کمک کند .

سورس کد را می توانید به صورت فایل فشرده شده (Zip.) دانلود کنید .

پاسخ 2 :

شما باید click listener مربوط به view را در کلاس ViewHolder تنظیم کنید .