HeroTabActivity.java

package com.boardgamegeek.ui;

import android.os.Bundle;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBar;
import android.text.TextUtils;
import android.view.View;
import android.widget.ImageView;

import com.boardgamegeek.R;

import butterknife.BindView;

/**
 * A navigation drawer activity that displays a hero image over a view pager.
 */
public abstract class HeroTabActivity extends DrawerActivity {
	@BindView(R.id.coordinator) CoordinatorLayout coordinator;
	@BindView(R.id.collapsing_toolbar) CollapsingToolbarLayout collapsingToolbar;
	@BindView(R.id.toolbar_image) ImageView toolbarImage;
	@BindView(R.id.scrim) View scrimView;
	@BindView(R.id.tab_layout) TabLayout tabLayout;
	@BindView(R.id.viewpager) ViewPager viewPager;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		final ActionBar actionBar = getSupportActionBar();
		if (actionBar != null) {
			actionBar.setDisplayHomeAsUpEnabled(true);
		}

		setUpViewPager();
		tabLayout.setupWithViewPager(viewPager);
	}

	protected abstract void setUpViewPager();

	@Override
	protected int getLayoutResId() {
		return R.layout.activity_hero_tab;
	}

	protected void safelySetTitle(String title) {
		if (!TextUtils.isEmpty(title)) {
			collapsingToolbar.setTitle(title);
		}
	}
}