HorizontalRvActivity.java

package yifeiyuan.practice.practicedemos.recyclerview;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;

import butterknife.ButterKnife;
import butterknife.InjectView;
import yifeiyuan.practice.practicedemos.R;

public class HorizontalRvActivity extends AppCompatActivity {

    @InjectView(R.id.toolbar)
    Toolbar mToolbar;
    @InjectView(R.id.fab)
    FloatingActionButton mFab;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_horizontal_rv);
        ButterKnife.inject(this);
        mToolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(mToolbar);

        mFab = (FloatingActionButton) findViewById(R.id.fab);
        mFab.setOnClickListener(view -> Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                .setAction("Action", null).show());

        getSupportFragmentManager().beginTransaction().add(R.id.fl_container, new HoriListFragment(), "Horizen").commit();

    }

}