导航菜单横向左右滑动并和下方的控件实现联动(有效果图)
这个是美团网个人订单的效果,找了很多地方都没找到,自己研究了两天终于弄出来了^_^,有什么问题希望大家指出来,谢谢。
实现原理是上方使用HorizontalScrollView这个可以水平横向拖动的控件,在其中加入了5个RadioButton;下方使用的是ViewPager,里面加入了7个Layout文件,其中第一个和最后一个为空,是为了实现拖到第一个屏幕的时候还能往外拖动的效果。
先看下效果,切换都是带动画效果的,并且点击上面最右边的标签时会自动滚动出后面的标签。
现在看一下代码:
Java代码
- packagecom.zj.horizontalsrollview;
- importjava.util.ArrayList;
- importandroid.app.Activity;
- importandroid.os.Bundle;
- importandroid.os.Parcelable;
- importandroid.support.v4.view.PagerAdapter;
- importandroid.support.v4.view.ViewPager;
- importandroid.support.v4.view.ViewPager.OnPageChangeListener;
- importandroid.util.Log;
- importandroid.view.View;
- importandroid.view.View.OnClickListener;
- importandroid.view.ViewGroup.MarginLayoutParams;
- importandroid.view.animation.Animation;
- importandroid.view.animation.AnimationSet;
- importandroid.view.animation.AnimationUtils;
- importandroid.view.animation.TranslateAnimation;
- importandroid.widget.HorizontalScrollView;
- importandroid.widget.ImageView;
- importandroid.widget.RadioButton;
- importandroid.widget.RadioGroup;
- importandroid.widget.RadioGroup.OnCheckedChangeListener;
- importandroid.widget.RelativeLayout;
- importandroid.widget.RelativeLayout.LayoutParams;
- /**
- *HorizontalScrollView和ViewPager联动效果
- *上面为HorizontalScrollView,下面为ViewPager
- *@authorzj
- *2012-5-23下午1:07:06
- */
- publicclassMainActivityextendsActivityimplementsOnCheckedChangeListener{
- privateRadioGroupmRadioGroup;
- privateRadioButtonmRadioButton1;
- privateRadioButtonmRadioButton2;
- privateRadioButtonmRadioButton3;
- privateRadioButtonmRadioButton4;
- privateRadioButtonmRadioButton5;
- privateImageViewmImageView;
- privatefloatmCurrentCheckedRadioLeft;//当前被选中的RadioButton距离左侧的距离
- privateHorizontalScrollViewmHorizontalScrollView;//上面的水平滚动控件
- privateViewPagermViewPager;//下方的可横向拖动的控件
- privateArrayList
mViews; //用来存放下方滚动的layout(layout_1,layout_2,layout_3) - @Override
- publicvoidonCreate(BundlesavedInstanceState){
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- iniController();
- iniListener();
- iniVariable();
- mRadioButton1.setChecked(true);
- mViewPager.setCurrentItem(1);
- mCurrentCheckedRadioLeft=getCurrentCheckedRadioLeft();
- }
- privatevoidiniVariable(){
- //TODOAuto-generatedmethodstub
- mViews=newArrayList
(); - mViews.add(getLayoutInflater().inflate(R.layout.layout_0,null));
- mViews.add(getLayoutInflater().inflate(R.layout.layout_1,null));
- mViews.add(getLayoutInflater().inflate(R.layout.layout_2,null));
- mViews.add(getLayoutInflater().inflate(R.layout.layout_3,null));
- mViews.add(getLayoutInflater().inflate(R.layout.layout_4,null));
- mViews.add(getLayoutInflater().inflate(R.layout.layout_5,null));
- mViews.add(getLayoutInflater().inflate(R.layout.layout_0,null));
- mViewPager.setAdapter(newMyPagerAdapter());//设置ViewPager的适配器
- }
- /**
- *RadioGroup点击CheckedChanged监听
- */
- @Override
- publicvoidonCheckedChanged(RadioGroupgroup,intcheckedId){
- AnimationSet_AnimationSet=newAnimationSet(true);
- TranslateAnimation_TranslateAnimation;
- Log.i("zj","checkedid="+checkedId);
- if(checkedId==R.id.btn1){
- _TranslateAnimation=newTranslateAnimation(mCurrentCheckedRadioLeft,getResources().getDimension(R.dimen.rdo1),0f,0f);
- _AnimationSet.addAnimation(_TranslateAnimation);
- _AnimationSet.setFillBefore(false);
- _AnimationSet.setFillAfter(true);
- _AnimationSet.setDuration(100);
- /*LayoutParams_LayoutParams1=newLayoutParams(100,4);
- _LayoutParams1.setMargins(0,0,0,0);
- _LayoutParams1.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);*/
- //mImageView.bringToFront();
- mImageView.startAnimation(_AnimationSet);//开始上面蓝色横条图片的动画切换
- //mImageView.setLayoutParams(_LayoutParams1);
- mViewPager.setCurrentItem(1);//让下方ViewPager跟随上面的HorizontalScrollView切换
- }elseif(checkedId==R.id.btn2){
- _TranslateAnimation=newTranslateAnimation(mCurrentCheckedRadioLeft,getResources().getDimension(R.dimen.rdo2),0f,0f);
- _AnimationSet.addAnimation(_TranslateAnimation);
- _AnimationSet.setFillBefore(false);
- _AnimationSet.setFillAfter(true);
- _AnimationSet.setDuration(100);
- //mImageView.bringToFront();
- mImageView.startAnimation(_AnimationSet);
- mViewPager.setCurrentItem(2);
- }elseif(checkedId==R.id.btn3){
- _TranslateAnimation=newTranslateAnimation(mCurrentCheckedRadioLeft,getResources().getDimension(R.dimen.rdo3),0f,0f);
- _AnimationSet.addAnimation(_TranslateAnimation);
- _AnimationSet.setFillBefore(false);
- _AnimationSet.setFillAfter(true);
- _AnimationSet.setDuration(100);
- //mImageView.bringToFront();
- mImageView.startAnimation(_AnimationSet);
- mViewPager.setCurrentItem(3);
- }elseif(checkedId==R.id.btn4){
- _TranslateAnimation=newTranslateAnimation(mCurrentCheckedRadioLeft,getResources().getDimension(R.dimen.rdo4),0f,0f);
- _AnimationSet.addAnimation(_TranslateAnimation);
- _AnimationSet.setFillBefore(false);
- _AnimationSet.setFillAfter(true);
- _AnimationSet.setDuration(100);
- //mImageView.bringToFront();
- mImageView.startAnimation(_AnimationSet);
- mViewPager.setCurrentItem(4);
- }elseif(checkedId==R.id.btn5){
- _TranslateAnimation=newTranslateAnimation(mCurrentCheckedRadioLeft,getResources().getDimension(R.dimen.rdo5),0f,0f);
- _AnimationSet.addAnimation(_TranslateAnimation);
- _AnimationSet.setFillBefore(false);
- _AnimationSet.setFillAfter(true);
- _AnimationSet.setDuration(100);
- //mImageView.bringToFront();
- mImageView.startAnimation(_AnimationSet);
- mViewPager.setCurrentItem(5);
- }
- mCurrentCheckedRadioLeft=getCurrentCheckedRadioLeft();
- Log.i("zj","getCurrentCheckedRadioLeft="+getCurrentCheckedRadioLeft());
- Log.i("zj","getDimension="+getResources().getDimension(R.dimen.rdo2));
- mHorizontalScrollView.smoothScrollTo((int)mCurrentCheckedRadioLeft-(int)getResources().getDimension(R.dimen.rdo2),0);
- }
- /**
- *获得当前被选中的RadioButton距离左侧的距离
- */
- privatefloatgetCurrentCheckedRadioLeft(){
- //TODOAuto-generatedmethodstub
- if(mRadioButton1.isChecked()){
- //Log.i("zj","currentCheckedRadioLeft="+getResources().getDimension(R.dimen.rdo1));
- returngetResources().getDimension(R.dimen.rdo1);
- }elseif(mRadioButton2.isChecked()){
- //Log.i("zj","currentCheckedRadioLeft="+getResources().getDimension(R.dimen.rdo2));
- returngetResources().getDimension(R.dimen.rdo2);
- }elseif(mRadioButton3.isChecked()){
- //Log.i("zj","currentCheckedRadioLeft="+getResources().getDimension(R.dimen.rdo3));
- returngetResources().getDimension(R.dimen.rdo3);
- }elseif(mRadioButton4.isChecked()){
- //Log.i("zj","currentCheckedRadioLeft="+getResources().getDimension(R.dimen.rdo4));
- returngetResources().getDimension(R.dimen.rdo4);
- }elseif(mRadioButton5.isChecked()){
- //Log.i("zj","currentCheckedRadioLeft="+getResources().getDimension(R.dimen.rdo5));
- returngetResources().getDimension(R.dimen.rdo5);
- }
- return0f;
- }
- privatevoidiniListener(){
- //TODOAuto-generatedmethodstub
- mRadioGroup.setOnCheckedChangeListener(this);
- mViewPager.setOnPageChangeListener(newMyPagerOnPageChangeListener());
- }
- privatevoidiniController(){
- //TODOAuto-generatedmethodstub
- mRadioGroup=(RadioGroup)findViewById(R.id.radioGroup);
- mRadioButton1=(RadioButton)findViewById(R.id.btn1);
- mRadioButton2=(RadioButton)findViewById(R.id.btn2);
- mRadioButton3=(RadioButton)findViewById(R.id.btn3);
- mRadioButton4=(RadioButton)findViewById(R.id.btn4);
- mRadioButton5=(RadioButton)findViewById(R.id.btn5);
- mImageView=(ImageView)findViewById(R.id.img1);
- mHorizontalScrollView=(HorizontalScrollView)findViewById(R.id.horizontalScrollView);
- mViewPager=(ViewPager)findViewById(R.id.pager);
- }
- /**
- *ViewPager的适配器
- *@authorzj
- *2012-5-24下午2:26:57
- */
- privateclassMyPagerAdapterextendsPagerAdapter{
- @Override
- publicvoiddestroyItem(Viewv,intposition,Objectobj){
- //TODOAuto-generatedmethodstub
- ((ViewPager)v).removeView(mViews.get(position));
- }
- @Override
- publicvoidfinishUpdate(Viewarg0){
- //TODOAuto-generatedmethodstub
- }
- @Override
- publicintgetCount(){
- //TODOAuto-generatedmethodstub
- returnmViews.size();
- }
- @Override
- publicObjectinstantiateItem(Viewv,intposition){
- ((ViewPager)v).addView(mViews.get(position));
- returnmViews.get(position);
- }
- @Override
- publicbooleanisViewFromObject(Viewarg0,Objectarg1){
- //TODOAuto-generatedmethodstub
- returnarg0==arg1;
- }
- @Override
- publicvoidrestoreState(Parcelablearg0,ClassLoaderarg1){
- //TODOAuto-generatedmethodstub
- }
- @Override
- publicParcelablesaveState(){
- //TODOAuto-generatedmethodstub
- returnnull;
- }
- @Override
- publicvoidstartUpdate(Viewarg0){
- //TODOAuto-generatedmethodstub
- }
- }
- /**
- *ViewPager的PageChangeListener(页面改变的监听器)
- *@authorzj
- *2012-5-24下午3:14:27
- */
- privateclassMyPagerOnPageChangeListenerimplementsOnPageChangeListener{
- @Override
- publicvoidonPageScrollStateChanged(intarg0){
- //TODOAuto-generatedmethodstub
- }
- @Override
- publicvoidonPageScrolled(intarg0,floatarg1,intarg2){
- //TODOAuto-generatedmethodstub
- }
- /**
- *滑动ViewPager的时候,让上方的HorizontalScrollView自动切换
- */
- @Override
- publicvoidonPageSelected(intposition){
- //TODOAuto-generatedmethodstub
- //Log.i("zj","position="+position);
- if(position==0){
- mViewPager.setCurrentItem(1);
- }elseif(position==1){
- mRadioButton1.performClick();
- }elseif(position==2){
- mRadioButton2.performClick();
- }elseif(position==3){
- mRadioButton3.performClick();
- }elseif(position==4){
- mRadioButton4.performClick();
- }elseif(position==5){
- mRadioButton5.performClick();
- }elseif(position==6){
- mViewPager.setCurrentItem(5);
- }
- }
- }
- }
package com.zj.horizontalsrollview;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.MarginLayoutParams;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.AnimationUtils;
import android.view.animation.TranslateAnimation;
import android.widget.HorizontalScrollView;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.RelativeLayout;
import android.widget.RelativeLayout.LayoutParams;
/**
* HorizontalScrollView和ViewPager联动效果
* 上面为HorizontalScrollView,下面为ViewPager
* @author zj
* 2012-5-23 下午1:07:06
*/
public class MainActivity extends Activity implements OnCheckedChangeListener{
private RadioGroup mRadioGroup;
private RadioButton mRadioButton1;
private RadioButton mRadioButton2;
private RadioButton mRadioButton3;
private RadioButton mRadioButton4;
private RadioButton mRadioButton5;
private ImageView mImageView;
private float mCurrentCheckedRadioLeft;//当前被选中的RadioButton距离左侧的距离
private HorizontalScrollView mHorizontalScrollView;//上面的水平滚动控件
private ViewPager mViewPager; //下方的可横向拖动的控件
private ArrayList mViews;//用来存放下方滚动的layout(layout_1,layout_2,layout_3)
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
iniController();
iniListener();
iniVariable();
mRadioButton1.setChecked(true);
mViewPager.setCurrentItem(1);
mCurrentCheckedRadioLeft = getCurrentCheckedRadioLeft();
}
private void iniVariable() {
// TODO Auto-generated method stub
mViews = new ArrayList();
mViews.add(getLayoutInflater().inflate(R.layout.layout_0, null));
mViews.add(getLayoutInflater().inflate(R.layout.layout_1, null));
mViews.add(getLayoutInflater().inflate(R.layout.layout_2, null));
mViews.add(getLayoutInflater().inflate(R.layout.layout_3, null));
mViews.add(getLayoutInflater().inflate(R.layout.layout_4, null));
mViews.add(getLayoutInflater().inflate(R.layout.layout_5, null));
mViews.add(getLayoutInflater().inflate(R.layout.layout_0, null));
mViewPager.setAdapter(new MyPagerAdapter());//设置ViewPager的适配器
}
/**
* RadioGroup点击CheckedChanged监听
*/
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
AnimationSet _AnimationSet = new AnimationSet(true);
TranslateAnimation _TranslateAnimation;
Log.i("zj", "checkedid="+checkedId);
if (checkedId == R.id.btn1) {
_TranslateAnimation = new TranslateAnimation(mCurrentCheckedRadioLeft, getResources().getDimension(R.dimen.rdo1), 0f, 0f);
_AnimationSet.addAnimation(_TranslateAnimation);
_AnimationSet.setFillBefore(false);
_AnimationSet.setFillAfter(true);
_AnimationSet.setDuration(100);
/*LayoutParams _LayoutParams1 = new LayoutParams(100, 4);
_LayoutParams1.setMargins(0, 0, 0, 0);
_LayoutParams1.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);*/
//mImageView.bringToFront();
mImageView.startAnimation(_AnimationSet);//开始上面蓝色横条图片的动画切换
//mImageView.setLayoutParams(_LayoutParams1);
mViewPager.setCurrentItem(1);//让下方ViewPager跟随上面的HorizontalScrollView切换
}else if (checkedId == R.id.btn2) {
_TranslateAnimation = new TranslateAnimation(mCurrentCheckedRadioLeft, getResources().getDimension(R.dimen.rdo2), 0f, 0f);
_AnimationSet.addAnimation(_TranslateAnimation);
_AnimationSet.setFillBefore(false);
_AnimationSet.setFillAfter(true);
_AnimationSet.setDuration(100);
//mImageView.bringToFront();
mImageView.startAnimation(_AnimationSet);
mViewPager.setCurrentItem(2);
}else if (checkedId == R.id.btn3) {
_TranslateAnimation = new TranslateAnimation(mCurrentCheckedRadioLeft, getResources().getDimension(R.dimen.rdo3), 0f, 0f);
_AnimationSet.addAnimation(_TranslateAnimation);
_AnimationSet.setFillBefore(false);
_AnimationSet.setFillAfter(true);
_AnimationSet.setDuration(100);
//mImageView.bringToFront();
mImageView.startAnimation(_AnimationSet);
mViewPager.setCurrentItem(3);
}else if (checkedId == R.id.btn4) {
_TranslateAnimation = new TranslateAnimation(mCurrentCheckedRadioLeft, getResources().getDimension(R.dimen.rdo4), 0f, 0f);
_AnimationSet.addAnimation(_TranslateAnimation);
_AnimationSet.setFillBefore(false);
_AnimationSet.setFillAfter(true);
_AnimationSet.setDuration(100);
//mImageView.bringToFront();
mImageView.startAnimation(_AnimationSet);
mViewPager.setCurrentItem(4);
}else if (checkedId == R.id.btn5) {
_TranslateAnimation = new TranslateAnimation(mCurrentCheckedRadioLeft, getResources().getDimension(R.dimen.rdo5), 0f, 0f);
_AnimationSet.addAnimation(_TranslateAnimation);
_AnimationSet.setFillBefore(false);
_AnimationSet.setFillAfter(true);
_AnimationSet.setDuration(100);
//mImageView.bringToFront();
mImageView.startAnimation(_AnimationSet);
mViewPager.setCurrentItem(5);
}
mCurrentCheckedRadioLeft = getCurrentCheckedRadioLeft();
Log.i("zj", "getCurrentCheckedRadioLeft="+getCurrentCheckedRadioLeft());
Log.i("zj", "getDimension="+getResources().getDimension(R.dimen.rdo2));
mHorizontalScrollView.smoothScrollTo((int)mCurrentCheckedRadioLeft-(int)getResources().getDimension(R.dimen.rdo2), 0);
}
/**
* 获得当前被选中的RadioButton距离左侧的距离
*/
private float getCurrentCheckedRadioLeft() {
// TODO Auto-generated method stub
if (mRadioButton1.isChecked()) {
//Log.i("zj", "currentCheckedRadioLeft="+getResources().getDimension(R.dimen.rdo1));
return getResources().getDimension(R.dimen.rdo1);
}else if (mRadioButton2.isChecked()) {
//Log.i("zj", "currentCheckedRadioLeft="+getResources().getDimension(R.dimen.rdo2));
return getResources().getDimension(R.dimen.rdo2);
}else if (mRadioButton3.isChecked()) {
//Log.i("zj", "currentCheckedRadioLeft="+getResources().getDimension(R.dimen.rdo3));
return getResources().getDimension(R.dimen.rdo3);
}else if (mRadioButton4.isChecked()) {
//Log.i("zj", "currentCheckedRadioLeft="+getResources().getDimension(R.dimen.rdo4));
return getResources().getDimension(R.dimen.rdo4);
}else if (mRadioButton5.isChecked()) {
//Log.i("zj", "currentCheckedRadioLeft="+getResources().getDimension(R.dimen.rdo5));
return getResources().getDimension(R.dimen.rdo5);
}
return 0f;
}
private void iniListener() {
// TODO Auto-generated method stub
mRadioGroup.setOnCheckedChangeListener(this);
mViewPager.setOnPageChangeListener(new MyPagerOnPageChangeListener());
}
private void iniController() {
// TODO Auto-generated method stub
mRadioGroup = (RadioGroup)findViewById(R.id.radioGroup);
mRadioButton1 = (RadioButton)findViewById(R.id.btn1);
mRadioButton2 = (RadioButton)findViewById(R.id.btn2);
mRadioButton3 = (RadioButton)findViewById(R.id.btn3);
mRadioButton4 = (RadioButton)findViewById(R.id.btn4);
mRadioButton5 = (RadioButton)findViewById(R.id.btn5);
mImageView = (ImageView)findViewById(R.id.img1);
mHorizontalScrollView = (HorizontalScrollView)findViewById(R.id.horizontalScrollView);
mViewPager = (ViewPager)findViewById(R.id.pager);
}
/**
* ViewPager的适配器
* @author zj
* 2012-5-24 下午2:26:57
*/
private class MyPagerAdapter extends PagerAdapter{
@Override
public void destroyItem(View v, int position, Object obj) {
// TODO Auto-generated method stub
((ViewPager)v).removeView(mViews.get(position));
}
@Override
public void finishUpdate(View arg0) {
// TODO Auto-generated method stub
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mViews.size();
}
@Override
public Object instantiateItem(View v, int position) {
((ViewPager)v).addView(mViews.get(position));
return mViews.get(position);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0 == arg1;
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {
// TODO Auto-generated method stub
}
@Override
public Parcelable saveState() {
// TODO Auto-generated method stub
return null;
}
@Override
public void startUpdate(View arg0) {
// TODO Auto-generated method stub
}
}
/**
* ViewPager的PageChangeListener(页面改变的监听器)
* @author zj
* 2012-5-24 下午3:14:27
*/
private class MyPagerOnPageChangeListener implements OnPageChangeListener{
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
/**
* 滑动ViewPager的时候,让上方的HorizontalScrollView自动切换
*/
@Override
public void onPageSelected(int position) {
// TODO Auto-generated method stub
//Log.i("zj", "position="+position);
if (position == 0) {
mViewPager.setCurrentItem(1);
}else if (position == 1) {
mRadioButton1.performClick();
}else if (position == 2) {
mRadioButton2.performClick();
}else if (position == 3) {
mRadioButton3.performClick();
}else if (position == 4) {
mRadioButton4.performClick();
}else if (position == 5) {
mRadioButton5.performClick();
}else if (position == 6) {
mViewPager.setCurrentItem(5);
}
}
}
} XML文件:
Xml代码
- xmlversion="1.0"encoding="utf-8"?>
- <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- <HorizontalScrollView
- android:layout_width="match_parent"
- android:layout_height="50dp"
- android:fadingEdge="@null"
- android:scrollbars="none"
- android:background="#555555"
- android:id="@+id/horizontalScrollView"
- >
- <RelativeLayout
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:background="#33b5e5"
- >
- <RadioGroup
- android:id="@+id/radioGroup"
- android:layout_width="fill_parent"
- android:layout_height="49dp"
- android:orientation="horizontal"
- android:layout_alignParentTop="true"
- >
- <RadioButton
- style="@style/radioButton"
- android:text="one"
- android:id="@+id/btn1"
- />
- <RadioButton
- style="@style/radioButton"
- android:text="two"
- android:id="@+id/btn2"
- />
- <RadioButton
- style="@style/radioButton"
- android:text="three"
- android:id="@+id/btn3"
- />
- <RadioButton
- style="@style/radioButton"
- android:text="four"
- android:id="@+id/btn4"
- />
- <RadioButton
- style="@style/radioButton"
- android:text="five"
- android:id="@+id/btn5"
- />
- RadioGroup>
- <ImageView
- android:id="@+id/img1"
- android:layout_width="100dp"
- android:layout_height="4dp"
- android:background="#33b5e5"
- android:layout_alignParentBottom="true"
- />
- RelativeLayout>
- HorizontalScrollView>
- <android.support.v4.view.ViewPager
- android:id="@+id/pager"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- />
- LinearLayout>