Android开发之CoordinatorLayoutAppBarLayoutViewPagerTabLayout实现顶部伸缩效果

来源：互联网发布：淘宝店怎么设置类目编辑：程序博客网时间：2024/06/05 09:57

源码已上传到码云上https://git.oschina.net/osczaizai/AndroidDemo

前面学习了coordinatorLayout，

连接：http://cherylgood.cn/c/Android开发之CoordinatorLayout使用详解一.php

http://cherylgood.cn/c/Android开发之CoordinatorLayout使用详解二.php

现在我们来个小demo 其实代码都很简单，只要你看了前面的两个使用介绍，基本久OK了

1、主布局文件

<?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"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_recycler_view"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="guanaj.com.coordinatorlayoutdemo.recyclerdemo.RecyclerViewActivity">    <android.support.design.widget.AppBarLayout        android:id="@+id/appbar"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="vertical"        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">        <LinearLayout            android:id="@+id/toolbar"            android:layout_width="match_parent"            android:layout_height="120dp"            android:background="#cccccc"            app:layout_scrollFlags="scroll|enterAlways">            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="top content"                android:textColor="#000" />        </LinearLayout>    </android.support.design.widget.AppBarLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="vertical"        app:layout_behavior="@string/appbar_scrolling_view_behavior">        <android.support.design.widget.TabLayout            android:id="@+id/tablayout"            android:layout_width="match_parent"            android:layout_height="wrap_content"            app:tabTextColor="#000000" />        <android.support.v4.view.ViewPager            android:id="@+id/viewpager"            android:layout_width="match_parent"            android:layout_height="match_parent">        </android.support.v4.view.ViewPager>    </LinearLayout></android.support.design.widget.CoordinatorLayout>

重点看这两句：

app:layout_scrollFlags="scroll|enterAlways"

app:layout_behavior="@string/appbar_scrolling_view_behavior"其实

layout_behavior 只要设置在有子view 是可以滚动的就可以了，主activity代码：

package guanaj.com.coordinatorlayoutdemo.recyclerdemo;import android.net.Uri;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.os.Bundle;import java.util.ArrayList;import java.util.List;import guanaj.com.coordinatorlayoutdemo.R;public class RecyclerViewActivity extends AppCompatActivity {    private TabLayout tabLayout;    private ViewPager viewPager;    private List<Fragment> fragmentList = new ArrayList<>();    private MyFragmentAdapter adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_recycler_view);        initViews();        initEvent();        initData();    }    private void initViews() {        tabLayout = (TabLayout) findViewById(R.id.tablayout);        viewPager = (ViewPager) findViewById(R.id.viewpager);        tabLayout.setupWithViewPager(viewPager);        adapter = new MyFragmentAdapter(getSupportFragmentManager());        viewPager.setAdapter(adapter);    }    private void initEvent() {    }    private void initData() {        for (int i = 0;i<5;i++){            Fragment fragment = new ContentFragment();            fragmentList.add(fragment);        }        adapter.notifyDataSetChanged();    }    class MyFragmentAdapter extends FragmentPagerAdapter {        public MyFragmentAdapter(FragmentManager fm) {            super(fm);        }        @Override        public CharSequence getPageTitle(int position) {            return "标题："+position;        }        @Override        public Fragment getItem(int position) {            return fragmentList.get(position);        }        @Override        public int getCount() {            return fragmentList == null ? 0 : fragmentList.size();        }    }}

http://cherylgood.cn/c/Android开发之CoordinatorLayoutAppBarLayoutViewPagerTabLayout实现.php

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