主页面：

package com.loaderman.samplecollect.hideonscroll;

import android.content.Intent;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.Toolbar;

import android.view.View;

import android.widget.Button;

import com.loaderman.samplecollect.R;

public class MainHideScrollyActivity extends AppCompatActivity implements View.OnClickListener {

    private Button partOneButton;

    private Button partTwoButton;

    private Button partThreeButton;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main_hide);

        initToolbar();

        partOneButton = (Button) findViewById(R.id.partOneButton);

        partTwoButton = (Button) findViewById(R.id.partTwoButton);

        partThreeButton = (Button) findViewById(R.id.partThreeButton);

        partOneButton.setOnClickListener(this);

        partTwoButton.setOnClickListener(this);

        partThreeButton.setOnClickListener(this);

    }

    private void initToolbar() {

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

        setSupportActionBar(toolbar);

        setTitle(getString(R.string.app_name));

    }

    @Override

    public void onClick(View v) {

        if(v.equals(partOneButton)) {

            startActivity(PartOneActivity.class);

        } else if(v.equals(partTwoButton)) {

            startActivity(PartTwoActivity.class);

        } else if(v.equals(partThreeButton)){

            startActivity(PartThreeActivity.class);

        }

    }

    private void startActivity(Class<?> activityClass) {

        Intent myIntent = new Intent(this, activityClass);

        startActivity(myIntent);

    }

}

RecyclerView滑动监听

package com.loaderman.samplecollect.hideonscroll;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

/*

* This class is a ScrollListener for RecyclerView that allows to show/hide

* views when list is scrolled. It assumes that you have added a header

* to your list. @see pl.michalz.hideonscrollexample.RecyclerAdapter

* */

public abstract class HidingScrollListener extends RecyclerView.OnScrollListener {

    private static final int HIDE_THRESHOLD = 20;

    private int mScrolledDistance = 0;

    private boolean mControlsVisible = true;

    @Override

    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {

        super.onScrolled(recyclerView, dx, dy);

        int firstVisibleItem = ((LinearLayoutManager) recyclerView.getLayoutManager()).findFirstVisibleItemPosition();

        if (firstVisibleItem == 0) {

            if(!mControlsVisible) {

                onShow();

                mControlsVisible = true;

            }

        } else {

            if (mScrolledDistance > HIDE_THRESHOLD && mControlsVisible) {

                onHide();

                mControlsVisible = false;

                mScrolledDistance = 0;

            } else if (mScrolledDistance < -HIDE_THRESHOLD && !mControlsVisible) {

                onShow();

                mControlsVisible = true;

                mScrolledDistance = 0;

            }

        }

        if((mControlsVisible && dy>0) || (!mControlsVisible && dy<0)) {

            mScrolledDistance += dy;

        }

    }

    public abstract void onHide();

    public abstract void onShow();

}

工具类

package com.loaderman.samplecollect.hideonscroll;

import android.content.Context;

import android.content.res.TypedArray;

import com.loaderman.samplecollect.R;

public class Utils {

    public static int getToolbarHeight(Context context) {

        final TypedArray styledAttributes = context.getTheme().obtainStyledAttributes(

                new int[]{R.attr.actionBarSize});

        int toolbarHeight = (int) styledAttributes.getDimension(0, 0);

        styledAttributes.recycle();

        return toolbarHeight;

    }

    public static int getTabsHeight(Context context) {

        return (int) context.getResources().getDimension(R.dimen.tabsHeight);

    }

}

FAB按钮滑动行为

package com.loaderman.samplecollect.hideonscroll;

import android.content.Context;

import android.support.design.widget.AppBarLayout;

import android.support.design.widget.CoordinatorLayout;

import android.support.design.widget.FloatingActionButton;

import android.util.AttributeSet;

import android.view.View;

public class ScrollingFABBehavior extends FloatingActionButton.Behavior {

    private int toolbarHeight;

    public ScrollingFABBehavior(Context context, AttributeSet attrs) {

        super();

        this.toolbarHeight = Utils.getToolbarHeight(context);

    }

    @Override

    public boolean layoutDependsOn(CoordinatorLayout parent, FloatingActionButton fab, View dependency) {

        return super.layoutDependsOn(parent, fab, dependency) || (dependency instanceof AppBarLayout);

    }

    @Override

    public boolean onDependentViewChanged(CoordinatorLayout parent, FloatingActionButton fab, View dependency) {

        boolean returnValue = super.onDependentViewChanged(parent, fab, dependency);

        if (dependency instanceof AppBarLayout) {

                CoordinatorLayout.LayoutParams lp = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();

                int fabBottomMargin = lp.bottomMargin;

                int distanceToScroll = fab.getHeight() + fabBottomMargin;

                float ratio = (float)dependency.getY()/(float)toolbarHeight;

                fab.setTranslationY(-distanceToScroll * ratio);

        }

        return returnValue;

    }

}

RecyclerAdapter

package com.loaderman.samplecollect.hideonscroll;

import android.content.Context;

import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import com.loaderman.samplecollect.R;

import java.util.List;

/*

* RecyclerView Adapter that allows to add a header view.

* */

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private static final int TYPE_HEADER = 2;

    private static final int TYPE_ITEM = 1;

    private List<String> mItemList;

    public RecyclerAdapter(List<String> itemList) {

        mItemList = itemList;

    }

    @Override

    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        Context context = parent.getContext();

        if (viewType == TYPE_ITEM) {

            final View view = LayoutInflater.from(context).inflate(R.layout.recycler_item, parent, false);

            return RecyclerItemViewHolder.newInstance(view);

        } else if (viewType == TYPE_HEADER) {

            final View view = LayoutInflater.from(context).inflate(R.layout.recycler_header, parent, false);

            return new RecyclerHeaderViewHolder(view);

        }

        throw new RuntimeException("There is no type that matches the type " + viewType + " + make sure your using types correctly");

    }

    @Override

    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {

        if (!isPositionHeader(position)) {

            RecyclerItemViewHolder holder = (RecyclerItemViewHolder) viewHolder;

            String itemText = mItemList.get(position - 1); // header

            holder.setItemText(itemText);

        }

    }

    public int getBasicItemCount() {

        return mItemList == null ? 0 : mItemList.size();

    }

    @Override

    public int getItemViewType(int position) {

        if (isPositionHeader(position)) {

            return TYPE_HEADER;

        }

        return TYPE_ITEM;

    }

    @Override

    public int getItemCount() {

        return getBasicItemCount() + 1; // header

    }

    private boolean isPositionHeader(int position) {

        return position == 0;

    }

}
package com.loaderman.samplecollect.hideonscroll;

import android.support.v7.widget.RecyclerView;

import android.view.View;

public class RecyclerHeaderViewHolder extends RecyclerView.ViewHolder {

    public RecyclerHeaderViewHolder(View itemView) {

        super(itemView);

    }

}
package com.loaderman.samplecollect.hideonscroll;

import android.support.v7.widget.RecyclerView;

import android.view.View;

import android.widget.TextView;

import com.loaderman.samplecollect.R;

public class RecyclerItemViewHolder extends RecyclerView.ViewHolder {

    private final TextView mItemTextView;

    public RecyclerItemViewHolder(final View parent, TextView itemTextView) {

        super(parent);

        mItemTextView = itemTextView;

    }

    public static RecyclerItemViewHolder newInstance(View parent) {

        TextView itemTextView = (TextView) parent.findViewById(R.id.itemTextView);

        return new RecyclerItemViewHolder(parent, itemTextView);

    }

    public void setItemText(CharSequence text) {

        mItemTextView.setText(text);

    }

}

页面一

package com.loaderman.samplecollect.hideonscroll;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.support.v7.widget.Toolbar;

import android.view.animation.AccelerateInterpolator;

import android.view.animation.DecelerateInterpolator;

import android.widget.FrameLayout;

import android.widget.ImageButton;

import com.loaderman.samplecollect.R;

import java.util.ArrayList;

import java.util.List;

public class PartOneActivity extends AppCompatActivity {

    private Toolbar mToolbar;

    private ImageButton mFabButton;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        setTheme(R.style.AppThemeRed);

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_part_one);

        initToolbar();

        mFabButton = (ImageButton) findViewById(R.id.fabButton);

        initRecyclerView();

    }

    private void initToolbar() {

        mToolbar = (Toolbar) findViewById(R.id.toolbar);

        setSupportActionBar(mToolbar);

        setTitle(getString(R.string.app_name));

        mToolbar.setTitleTextColor(getResources().getColor(android.R.color.white));

    }

    private void initRecyclerView() {

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

        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        RecyclerAdapter recyclerAdapter = new RecyclerAdapter(createItemList());

        recyclerView.setAdapter(recyclerAdapter);

        recyclerView.addOnScrollListener(new HidingScrollListener() {

            @Override

            public void onHide() {

                hideViews();

            }

            @Override

            public void onShow() {

                showViews();

            }

        });

    }

    private void hideViews() {

        mToolbar.animate().translationY(-mToolbar.getHeight()).setInterpolator(new AccelerateInterpolator(2));

        FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mFabButton.getLayoutParams();

        int fabBottomMargin = lp.bottomMargin;

        mFabButton.animate().translationY(mFabButton.getHeight()+fabBottomMargin).setInterpolator(new AccelerateInterpolator(2)).start();

    }

    private void showViews() {

        mToolbar.animate().translationY(0).setInterpolator(new DecelerateInterpolator(2));

        mFabButton.animate().translationY(0).setInterpolator(new DecelerateInterpolator(2)).start();

    }

    private List<String> createItemList() {

        List<String> itemList = new ArrayList<>();

        for(int i=0;i<20;i++) {

            itemList.add("Item "+i);

        }

        return itemList;

    }

}

页面二

package com.loaderman.samplecollect.hideonscroll;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.view.View;

import android.view.animation.AccelerateInterpolator;

import android.view.animation.DecelerateInterpolator;

import android.widget.FrameLayout;

import android.widget.ImageButton;

import android.widget.RelativeLayout;

import android.widget.Toast;

import com.loaderman.samplecollect.R;

import java.util.ArrayList;

import java.util.List;

public class PartTwoActivity extends AppCompatActivity {

    private RelativeLayout mToolbar;

    private ImageButton mFabButton;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setTheme(R.style.AppThemeGreen);

        setContentView(R.layout.activity_part_two);

        mToolbar = findViewById(R.id.rl_title_bar);

        mFabButton = (ImageButton) findViewById(R.id.fabButton);

        initRecyclerView();

    }

    private void initRecyclerView() {

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

        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        RecyclerAdapter recyclerAdapter = new RecyclerAdapter(createItemList());

        recyclerView.setAdapter(recyclerAdapter);

        recyclerView.addOnScrollListener(new HidingScrollListener() {

            @Override

            public void onHide() {

                hideViews();

            }

            @Override

            public void onShow() {

                showViews();

            }

        });

        mFabButton.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                Toast.makeText(PartTwoActivity.this,"点击了", Toast.LENGTH_SHORT).show();

            }

        });

    }

    private void hideViews() {

        mToolbar.animate().translationY(-mToolbar.getHeight()).setInterpolator(new AccelerateInterpolator(2));

        FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mFabButton.getLayoutParams();

        int fabBottomMargin = lp.bottomMargin;

        mFabButton.animate().translationY(mFabButton.getHeight()+fabBottomMargin).setInterpolator(new AccelerateInterpolator(2)).start();

    }

    private void showViews() {

        mToolbar.animate().translationY(0).setInterpolator(new DecelerateInterpolator(2));

        mFabButton.animate().translationY(0).setInterpolator(new DecelerateInterpolator(2)).start();

    }

    private List<String> createItemList() {

        List<String> itemList = new ArrayList<>();

        for(int i=0;i<20;i++) {

            itemList.add("Item "+i);

        }

        return itemList;

    }

}

页面三

package com.loaderman.samplecollect.hideonscroll;

import android.os.Bundle;

import android.support.design.widget.TabLayout;

import android.support.v4.app.Fragment;

import android.support.v4.app.FragmentManager;

import android.support.v4.app.FragmentPagerAdapter;

import android.support.v4.view.ViewPager;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.Toolbar;

import com.loaderman.samplecollect.R;

import java.util.ArrayList;

import java.util.List;

public class PartThreeActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        setTheme(R.style.AppThemeBlue);

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_part_three);

        initToolbar();

        initViewPagerAndTabs();

    }

    private void initToolbar() {

        Toolbar mToolbar = (Toolbar) findViewById(R.id.toolbar);

        setSupportActionBar(mToolbar);

        setTitle(getString(R.string.app_name));

        mToolbar.setTitleTextColor(getResources().getColor(android.R.color.white));

    }

    private void initViewPagerAndTabs() {

        ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager);

        PagerAdapter pagerAdapter = new PagerAdapter(getSupportFragmentManager());

        pagerAdapter.addFragment(PartThreeFragment.createInstance(20), getString(R.string.tab_1));

        pagerAdapter.addFragment(PartThreeFragment.createInstance(4), getString(R.string.tab_2));

        viewPager.setAdapter(pagerAdapter);

        TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout);

        tabLayout.setupWithViewPager(viewPager);

    }

    static class PagerAdapter extends FragmentPagerAdapter {

        private final List<Fragment> fragmentList = new ArrayList<>();

        private final List<String> fragmentTitleList = new ArrayList<>();

        public PagerAdapter(FragmentManager fragmentManager) {

            super(fragmentManager);

        }

        public void addFragment(Fragment fragment, String title) {

            fragmentList.add(fragment);

            fragmentTitleList.add(title);

        }

        @Override

        public Fragment getItem(int position) {

            return fragmentList.get(position);

        }

        @Override

        public int getCount() {

            return fragmentList.size();

        }

        @Override

        public CharSequence getPageTitle(int position) {

            return fragmentTitleList.get(position);

        }

    }

}
package com.loaderman.samplecollect.hideonscroll;

import android.os.Bundle;

import android.support.annotation.Nullable;

import android.support.v4.app.Fragment;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import com.loaderman.samplecollect.R;

import java.util.ArrayList;

import java.util.List;

public class PartThreeFragment extends Fragment {

    public final static String ITEMS_COUNT_KEY = "PartThreeFragment$ItemsCount";

    public static PartThreeFragment createInstance(int itemsCount) {

        PartThreeFragment partThreeFragment = new PartThreeFragment();

        Bundle bundle = new Bundle();

        bundle.putInt(ITEMS_COUNT_KEY, itemsCount);

        partThreeFragment.setArguments(bundle);

        return partThreeFragment;

    }

    @Nullable

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        RecyclerView recyclerView = (RecyclerView) inflater.inflate(

                R.layout.fragment_part_three, container, false);

        setupRecyclerView(recyclerView);

        return recyclerView;

    }

    private void setupRecyclerView(RecyclerView recyclerView) {

        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

        RecyclerAdapter recyclerAdapter = new RecyclerAdapter(createItemList());

        recyclerView.setAdapter(recyclerAdapter);

    }

    private List<String> createItemList() {

        List<String> itemList = new ArrayList<>();

        Bundle bundle = getArguments();

        if(bundle!=null) {

            int itemsCount = bundle.getInt(ITEMS_COUNT_KEY);

            for (int i = 0; i < itemsCount; i++) {

                itemList.add("Item " + i);

            }

        }

        return itemList;

    }

}

主页面布局activty_main_hide.xml

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="vertical"

        android:layout_gravity="center">

        <Button

            android:id="@+id/partOneButton"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center"

            android:text="@string/part_one"/>

        <Button

            android:id="@+id/partTwoButton"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center"

            android:text="@string/part_two"/>

        <Button

            android:id="@+id/partThreeButton"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center"

            android:text="@string/part_three"/>

    </LinearLayout>

    <android.support.v7.widget.Toolbar

        android:id="@+id/toolbar"

        android:layout_width="match_parent"

        android:layout_height="?attr/actionBarSize"

        android:background="?attr/colorPrimary"/>

</FrameLayout>

activity_part_one.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

                android:layout_width="match_parent"

                android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView

            android:id="@+id/recyclerView"

            android:layout_width="match_parent"

            android:layout_height="match_parent"/>

    <android.support.v7.widget.Toolbar

            android:id="@+id/toolbar"

            android:layout_width="match_parent"

            android:layout_height="?attr/actionBarSize"

            android:background="?attr/colorPrimary"/>

    <ImageButton

            android:id="@+id/fabButton"

            android:layout_width="56dp"

            android:layout_height="56dp"

            android:layout_gravity="bottom|right"

            android:layout_marginBottom="16dp"

            android:layout_marginRight="16dp"

            android:background="@drawable/fab_bcg"

            android:src="@drawable/ic_favorite_outline_white_24dp"

            android:contentDescription="@string/fab_description"/>

</FrameLayout>

activity_part_two.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

                android:layout_width="match_parent"

                android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView

            android:id="@+id/recyclerView"

            android:layout_width="match_parent"

            android:layout_height="match_parent"/>

    <android.support.v7.widget.Toolbar

            android:id="@+id/toolbar"

            android:layout_width="match_parent"

            android:layout_height="?attr/actionBarSize"

            android:background="?attr/colorPrimary"/>

    <ImageButton

            android:id="@+id/fabButton"

            android:layout_width="56dp"

            android:layout_height="56dp"

            android:layout_gravity="bottom|right"

            android:layout_marginBottom="16dp"

            android:layout_marginRight="16dp"

            android:background="@drawable/fab_bcg"

            android:src="@drawable/ic_favorite_outline_white_24dp"

            android:contentDescription="@string/fab_description"/>

</FrameLayout>

activity_part_three.xml

<?xml version="1.0" encoding="utf-8"?>

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"

                                                 xmlns:app="http://schemas.android.com/apk/res-auto"

                                                 android:id="@+id/coordinatorLayout"

                                                 android:layout_width="match_parent"

                                                 android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout

            android:id="@+id/appBarLayout"

            android:layout_width="match_parent"

            android:layout_height="wrap_content">

        <android.support.v7.widget.Toolbar

                android:id="@+id/toolbar"

                android:layout_width="match_parent"

                android:layout_height="?attr/actionBarSize"

                android:background="?attr/colorPrimary"

                app:layout_scrollFlags="scroll|enterAlways" />

        <android.support.design.widget.TabLayout

                android:id="@+id/tabLayout"

                android:layout_width="match_parent"

                android:layout_height="wrap_content"

                app:tabTextColor="@android:color/white"

                app:tabSelectedTextColor="@android:color/white"

                app:tabIndicatorColor="@android:color/white"

                app:tabIndicatorHeight="3dp"/>

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager

            android:id="@+id/viewPager"

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

    <android.support.design.widget.FloatingActionButton

            android:id="@+id/fabButton"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="end|bottom"

            android:layout_margin="@dimen/fab_margin"

            android:src="@drawable/ic_favorite_outline_white_24dp"

            app:borderWidth="0dp"

            app:layout_behavior="com.loaderman.samplecollect.hideonscroll.ScrollingFABBehavior"/>

</android.support.design.widget.CoordinatorLayout>

recycler_item,xml

<?xml version="1.0" encoding="utf-8"?>

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:card_view="http://schemas.android.com/apk/res-auto"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:layout_gravity="center"

    android:layout_margin="8dp"

    card_view:cardCornerRadius="4dp">

    <TextView

        android:id="@+id/itemTextView"

        android:layout_width="match_parent"

        android:layout_height="?attr/listPreferredItemHeight"

        android:gravity="center_vertical"

        android:padding="8dp"

        style="@style/Base.TextAppearance.AppCompat.Body2"/>

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

recycler_header.xml

<?xml version="1.0" encoding="utf-8"?>

<View xmlns:android="http://schemas.android.com/apk/res/android"

      android:layout_width="match_parent"

      android:layout_height="?attr/actionBarSize"/>

效果图：

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