Android 简单好用又特效十足的粘性布局CoordinatorLayout

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。

需要依赖的包：compile 'com.android.support:design:24.2.0'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>


主界面代码：（接下来是三个fragment的布局自己任意写，在这里就不展示了。）
MainActivityimport 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);
}
}MyAdapterimport 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。