Android 粘性布局CoordinatorLayout

Android 粘性布局CoordinatorLayout

需要依赖的包：

compile 'com.android.support:design:24.2.0'

coordinatorlayout介绍：

coordinatorlayout是5.0之后推出一个功能。使用布局完成特效比较简单。它像一个协调者，来协助一些属性完成一些特效。appbarlayout,是一个可以滑动的控件，但是必须在coordinatorlayout里面才可以有滑动效果的，appbarlayout也是5.0推出的新特效。在这里不多说了，具体详细的一些属性，你可以在网上查找。这个属性用起来特别方便的，好像有的公司就推荐用这一种布局。

xml布局：

<?xml version="1.0" encoding="utf-8"?><android.support.design.widget.CoordinatorLayout    android:layout_width="match_parent"    android:layout_height="match_parent"    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto">    <android.support.design.widget.AppBarLayout        android:id="@+id/mAppbarLayout"        android:fitsSystemWindows="true"        android:layout_width="match_parent"        android:layout_height="300dp">        <android.support.design.widget.CollapsingToolbarLayout            android:id="@+id/mCtbarLayout"            android:fitsSystemWindows="true"            app:layout_scrollFlags="scroll|enterAlways"            android:layout_width="match_parent"            android:layout_height="250dp">        </android.support.design.widget.CollapsingToolbarLayout>        <android.support.design.widget.TabLayout            android:id="@+id/mTable"            android:fitsSystemWindows="true"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_alignParentBottom="true"            ></android.support.design.widget.TabLayout>    </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.v4.view.ViewPager></android.support.design.widget.CoordinatorLayout>

接下来是三个fragment的布局自己任意写，在这里就不展示了。

主界面代码：

MainActivity

import android.support.design.widget.TabLayout;import android.support.v4.app.Fragment;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private String[] s=new String[]{"主页","销售","我的"};    private List<Fragment> list;    private TabLayout mTablayout;    private ViewPager viewpager;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        initTitle();    }    private void initView() {        mTablayout= (TabLayout) findViewById(R.id.mTable);        viewpager= (ViewPager) findViewById(R.id.viewpager);    }    private void initTitle() {        list=new ArrayList<>();        list.add(new Fragment1());        list.add(new Fragment2());        list.add(new Fragment3());        MyAdapter adapter=new MyAdapter(getSupportFragmentManager(),list,s);        viewpager.setAdapter(adapter);        mTablayout.setupWithViewPager(viewpager);    }}

MyAdapter

import android.support.v4.app.Fragment;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentPagerAdapter;import android.support.v4.view.PagerAdapter;import android.view.View;import android.view.ViewGroup;import java.util.List;public class MyAdapter extends FragmentPagerAdapter{    private List<Fragment> list;    private String[] s;    public MyAdapter(FragmentManager fm,List<Fragment> list,String[] s) {        super(fm);        this.list=list;        this.s=s;    }    @Override    public Fragment getItem(int position) {        return list.get(position);    }    @Override    public int getCount() {        return list.size();    }    @Override    public boolean isViewFromObject(View view, Object object) {        return view==object;    }    @Override    public CharSequence getPageTitle(int position) {        return s[position];    }    @Override    public Object instantiateItem(ViewGroup container, int position) {        return super.instantiateItem(container, position);    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        super.destroyItem(container, position, object);    }}

VpAdapter

import android.content.Context;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import java.util.List;public class Vpadapter extends PagerAdapter{    private List<ImageView> list;    public Vpadapter(List<ImageView> list) {        this.list = list;    }    @Override    public int getCount() {        return 3;    }    @Override    public boolean isViewFromObject(View view, Object object) {        return view == object;    }    @Override    public Object instantiateItem(ViewGroup container, int position) {        container.addView( list.get(position), 0);//添加页卡        return list.get(position);    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        container.removeView(list.get(position));//删除页卡    }}

接下来写三个Fragment类，也不一一列举了，Fragment里添加个布局就行。