In the below example code I have Created a RecyclerView. In RecyclerView I have  added CardView Item Alternatively like Chat app .

First Item is on left, second is on Right. In Adapter class  I have used boolean type, variables(changeLayout).

You can see below example code it clearly describes Adding Card View Alternatively Within RecyclerView.

Step(1)-I have added first RecyclerView and CardView dependency to Grandle file -

  compile 'com.android.support:recyclerview-v7:21.0.+'
       compile 'com.android.support:cardview-v7:21.0.+'
      

 Step(2)-activity_main.xml layout-

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@color/backgraund">
    <android.support.v7.widget.RecyclerView

        android:id="@+id/recycler_view"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:scrollbars="vertical" />
    
</LinearLayout>

Step(3)-Created a row_left_text.xml layout-

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/card"
    android:scrollbarAlwaysDrawVerticalTrack="true"
    android:layout_margin="1dp"
    card_view:cardCornerRadius="4dp"
    card_view:cardElevation="@dimen/cardview_default_elevation"
    >
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="140dp"
        android:id="@+id/main"
        android:focusable="true"
        android:background="@color/left"
        android:clickable="true"
        android:paddingBottom="5dp"
        android:paddingTop="5dp"
        android:orientation="vertical">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingTop="5dp"
            android:paddingBottom="5dp"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp">
            <ImageView
                android:id="@+id/ivicon"
                android:src="@drawable/people"
                android:paddingLeft="5dp"
                android:layout_alignParentLeft="true"
                android:layout_width="65dp"
                android:layout_height="65dp"
                android:paddingBottom="14dp"/>


            <TextView
                android:id="@+id/tvtitle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:inputType="text"
                android:textStyle="bold"
                android:text="Arvind KUMAR"
                android:paddingTop="4dp"
                android:layout_centerHorizontal="true"
                android:textColor="@color/colorAccent"
                android:layout_toRightOf="@+id/ivicon"
                android:paddingRight="5dp"
                android:textSize="18dp" />


            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/tvhour"
                android:layout_toRightOf="@+id/ivicon"
                android:text="2 hour ago"
                android:layout_below="@id/tvtitle" />


            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:textColor="#352e2e"
                android:textSize="17dp"
                android:id="@+id/comment_text"
                android:text="Like most of our kind we are custom software system company."
                android:layout_below="@+id/tvhour" />

        </RelativeLayout>
    </LinearLayout>
</android.support.v7.widget.CardView>

Step(4)- Created a row_right_text.xml layout-

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/card"
    android:layout_margin="1dp"
    card_view:cardCornerRadius="4dp"
    card_view:cardElevation="@dimen/cardview_default_elevation"
    >
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="140dp"
        android:id="@+id/main"
        android:focusable="true"
        android:paddingBottom="5dp"
        android:paddingTop="5dp"
        android:background="@color/right"
        android:clickable="true"
        android:orientation="vertical">

        <RelativeLayout
            android:layout_width="match_parent"
            android:paddingBottom="5dp"
            android:paddingTop="5dp"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp">
            <ImageView
                android:id="@+id/ivicon"
                android:src="@drawable/people"
                android:paddingLeft="5dp"
                android:layout_alignParentRight="true"
                android:layout_width="65dp"
                android:layout_height="65dp"
                android:paddingBottom="14dp"/>

            <TextView
                android:id="@+id/tvtitle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:inputType="text"
                android:textStyle="bold"
                android:text="Arvind KUMAR"
                android:paddingTop="4dp"
                android:layout_centerHorizontal="true"
                android:textColor="@color/colorAccent"
                android:layout_toLeftOf="@+id/ivicon"
                android:paddingLeft="5dp"
                android:textSize="18dp" />


            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/tvhour"
                android:layout_toLeftOf="@+id/ivicon"
                android:text="2 hour ago"
                android:layout_below="@id/tvtitle"/>


            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:textColor="#4e4a4a"
                android:textSize="17dp"
                android:id="@+id/comment_text"
                android:text="Like most of our kind we are custom software system company."
                android:layout_below="@+id/tvhour" />

        </RelativeLayout>
    </LinearLayout>
</android.support.v7.widget.CardView>

Step(5)-Created a new class Recycler_text_data-

public class Recycler_text_data {
    
        private int imageId;
        private String title;
        private String comments;
        private String hour;


        public int getImageId(){return imageId;
        }
        public void setImageId(int imageId){
            this.imageId=imageId;
        }
        public  String getTitle(){return title;}
        public void setTitle(String title){
            this.title=title;
        }
        public  String getHour(){return hour;}
        public void setHour(String hour){
            this.hour=hour;
        }

        public  String getComments(){return comments;}
        public void setComments(String comments){
            this.comments=comments;
        }

    }

Step(6)-Created a new class Recycler_Text_comment_Adapter -

public class Recycler_Text_comment_Adapter extends RecyclerView.Adapter<Recycler_Text_comment_Adapter.MyViewHolder> {
    Context context;
    boolean changeLayout=true;
    private List<Recycler_text_data> data2;

    public Recycler_Text_comment_Adapter(Context context, List<Recycler_text_data> data2){
        this.data2 = data2;
        this.context=context;
    }

    public class MyViewHolder extends RecyclerView.ViewHolder  {
        public ImageView imageView;

        public TextView txtTitle;
        public TextView txtHour;
        public TextView txtComment;
        private LinearLayout main;

        public MyViewHolder(final View parent) {
            super(parent);

            txtTitle = (TextView) parent.findViewById(R.id.tvtitle);
            txtHour = (TextView) parent.findViewById(R.id.tvhour);
            txtComment=(TextView)parent.findViewById(R.id.comment_text);

            imageView=(ImageView)parent.findViewById(R.id.ivicon);
            main = (LinearLayout) parent.findViewById(R.id.main);
            main.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(itemView.getContext(), "Position:" + Integer.toString(getPosition()), Toast.LENGTH_SHORT).show();

                }
            });
        }
    }


    @Override
    public Recycler_Text_comment_Adapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView;
        System.out.println("view type"+ viewType);


        if(changeLayout) {
            itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_left_text, parent, false);
            changeLayout= !changeLayout;
        }
        else {
            itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_right_text, parent, false);
            changeLayout= !changeLayout;
        }
        return new MyViewHolder(itemView);

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

        Recycler_text_data row = data2.get(position);
        holder.txtTitle.setText(row.getTitle());
        holder.txtHour.setText(row.getHour());
        holder.txtComment.setText(row.getComments());
        holder.imageView.setImageResource(row.getImageId());
    }
    @Override
    public int getItemCount() {
        return data2.size();
    }
}

Step(7)MainActivity-

public class MainActivity extends AppCompatActivity {
    public static final String[] title = new String[]{"Inder tiwari :", "Raj :"};
    public static final String[] hour = new String[]{"22 Feb at 06:00 PM", "24 Feb at 06:00 PM"};
    public static final String[] comments = new String[]{"We are a team of 275+ technology evangelists, simply in love with the town we are headquartered in. This town has scenic beauty, talented pool of professionals, awesome weather... ", "We are a team of 275+ technology evangelists, simply in love with the town we are headquartered in. This town has scenic beauty, talented pool of professionals, awesome weather... "};
    public static final Integer[] images = {R.drawable.people, R.drawable.people};

    public List<Recycler_text_data> data2 = new ArrayList<>();
    private RecyclerView recyclerView;
    private Recycler_Text_comment_Adapter recyclerTextCommentAdapter;
    private LinearLayout main;

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

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

        data2 = new ArrayList<Recycler_text_data>();
        for (int i = 0; i < title.length; i++) {
            Recycler_text_data data = new Recycler_text_data();
            data.setImageId(images[i]);
            data.setTitle(title[i]);
            data.setHour(hour[i]);
            data.setComments(comments[i]);
            data2.add(data);
        }
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
        recyclerView.setLayoutManager(layoutManager);

        recyclerView.setItemAnimator(new DefaultItemAnimator());
        Recycler_Text_comment_Adapter recyclerTextCommentAdapter = new Recycler_Text_comment_Adapter(getApplicationContext(), data2);
        recyclerView.setAdapter(recyclerTextCommentAdapter);
    }
}