CoordinatorLayout、AppBarLayout实现上滑隐藏图片，下滑显示图片

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仿keep个人中心界面，实现上滑隐藏图片，下滑显示图片

activity_mode.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:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="240dp"
            app:contentScrim="@color/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">
            <ImageView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scaleType="centerCrop"
                android:src="@mipmap/splash"
                app:layout_collapseMode="parallax"/>
            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:title="keep"
                app:titleTextColor="@color/white"
                app:navigationIcon="@mipmap/back"
                app:layout_collapseMode="pin"/>

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

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


    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/id_recyclerview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

    </android.support.v4.widget.NestedScrollView>


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

ModeActivity.java

package com.zhoujian.mykeep.activity;

import android.graphics.Color;
import android.os.Bundle;
import android.support.design.widget.AppBarLayout;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;
import com.zhoujian.mykeep.R;
import com.zhoujian.mykeep.adapter.MainAdapter;
import com.zhoujian.mykeep.bean.Person;
import java.util.ArrayList;

/**
 * Created by zhoujian on 2017/3/14.
 */

public class ModeActivity extends AppCompatActivity
{

    public static final String TAG = "ModeActivity";
    private RecyclerView mRecyclerView;
    private ArrayList<Person> personList;
    private MainAdapter adapter;


    @Override
    protected void onCreate( Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_mode);
        initData();
        initView();
    }

    private void initData()
    {
        personList = new ArrayList<Person>();
        Person mPerson0= new Person("林黛玉");
        personList.add(mPerson0);
        Person mPerson1= new Person("薛宝钗");
        personList.add(mPerson1);
        Person mPerson2= new Person("贾元春");
        personList.add(mPerson2);
        Person mPerson3= new Person("贾迎春");
        personList.add(mPerson3);
        Person mPerson4= new Person("贾探春");
        personList.add(mPerson4);
        Person mPerson5= new Person("贾惜春");
        personList.add(mPerson5);
        Person mPerson6= new Person("史湘云");
        personList.add(mPerson6);
        Person mPerson7= new Person("王熙凤");
        personList.add(mPerson7);
        Person mPerson8= new Person("秦可卿");
        personList.add(mPerson8);
        Person mPerson9= new Person("贾宝玉");
        personList.add(mPerson9);

    }

    private void initView()
    {
        final Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
        toolbar.setTitleTextColor(Color.TRANSPARENT);
        toolbar.inflateMenu(R.menu.menu_search);


        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });

        toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                switch (item.getItemId()){
                    case R.id.item_search:
                        //点击设置
                        Toast.makeText(ModeActivity.this, "按钮被点击了", Toast.LENGTH_SHORT).show();
                        break;

                }
                return false;
            }
        });



        AppBarLayout app_bar_layout = (AppBarLayout)findViewById(R.id.app_bar_layout);

        final CollapsingToolbarLayout collapsing_toolbar_layout = (CollapsingToolbarLayout)findViewById(R.id.collapsing_toolbar_layout);
        collapsing_toolbar_layout.setTitle("");
        collapsing_toolbar_layout.setCollapsedTitleTextColor(getResources().getColor(R.color.white));
        collapsing_toolbar_layout.setExpandedTitleColor(getResources().getColor(R.color.white));
        collapsing_toolbar_layout.setExpandedTitleColor(Color.TRANSPARENT);


        app_bar_layout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
            @Override
            public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
                Log.e(TAG,"appBarLayoutHeight:"+appBarLayout.getHeight()+" getTotalScrollRange:"+appBarLayout.getTotalScrollRange()+" offSet:"+verticalOffset);
                if(Math.abs(verticalOffset) >= appBarLayout.getTotalScrollRange()){
                    toolbar.setTitleTextColor(getResources().getColor(R.color.white));
                    collapsing_toolbar_layout.setTitle("keep");
                }else{
                    collapsing_toolbar_layout.setTitle("");
                }
            }
        });


        mRecyclerView =(RecyclerView) findViewById(R.id.id_recyclerview);
        adapter = new MainAdapter(ModeActivity.this, personList);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(ModeActivity.this));
        mRecyclerView.addItemDecoration(new DividerItemDecoration(ModeActivity.this,DividerItemDecoration.VERTICAL));
        // 设置item动画
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());
        mRecyclerView.setAdapter(adapter);

    }
}

实现效果

源码下载

源码下载：https://github.com/zeke123/MyKeep