android ViewPager,ViewFlipper,ViewFlow实现左右滑动

开篇

首页只是作为ViewPager，ViewFlipper，ViewFlow的入口，提供三个Button进行跳转。



1. ViewPager

先看看官方文档怎么介绍ViewPager的：http://developer.android.com/reference/android/support/v4/view/ViewPager.html

继承关系如下：

java.lang.Object

android.view.View

android.view.ViewGroup

android.support.v4.view.ViewPager

ViewPager做为容器类，可以结合View（Layout）和Fragment（Android 3.0 才引入的），官方文档说ViewPager+Fragment配合使用更好。ViewPager不在android
sdk 自带jar包中，来源google 的补充组件android-support-v4.jar，没有的话可以通过eclipse下载和自己下载再添加到相应的工程中，本例用的是android-support-v13.jar，完全兼容android-support-v4.jar，看看android-support-v13.jar的目录结构：

[android-support-v13.jar下载]



切入正题，ViewPager用法如下：

配置文件：viewpager_layout.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />

</RelativeLayout>

源文件如下ViewPagerActivity.java如下：

package com.xyz.vvv.ViewPager;

import java.util.ArrayList;

import com.xyz.vvv.R;

import android.app.ActionBar;
import android.app.ActionBar.LayoutParams;
import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.content.Context;
import android.os.Bundle;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;

public class ViewPagerActivity extends Activity {

private ViewPager mViewPager;
private ViewPagerAdapter mAdapter;
private ActionBar mTabBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.viewpager_layout);

mViewPager = (ViewPager) findViewById(R.id.viewpager);
mAdapter = new ViewPagerAdapter(this, mViewPager);
mTabBar = getActionBar();

mAdapter.addTab(mTabBar.newTab().setIcon(R.drawable.tab_icon_qworld),
FirstFragment.class, null);
mAdapter.addTab(mTabBar.newTab().setIcon(R.drawable.tab_icon_group),
SecondFragment.class, null);
mAdapter.addTab(mTabBar.newTab().setIcon(R.drawable.tab_icon_friends),
ThreeFragment.class, null);
mAdapter.addTab(mTabBar.newTab().setIcon(R.drawable.tab_icon_recent),
FourFragment.class, null);

}

private View getCustomView() {
return getLayoutInflater().inflate(R.layout.title_panel_layout, null);
}

private static class ViewPagerAdapter extends FragmentPagerAdapter
implements TabListener, OnPageChangeListener {

private Context mContext;
private ActionBar mActionBar = null;
private ViewPager mViewPager = null;
private ArrayList<TabInfo> mTabList = new ArrayList<TabInfo>();

public ViewPagerAdapter(Activity activity, ViewPager viewPager) {
// TODO Auto-generated constructor stub
super(activity.getFragmentManager());
mContext = activity;
mActionBar = activity.getActionBar();
/*
* mActionBar.setCustomView(getCustomView(), new LayoutParams(
* LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
*/
mActionBar.setDisplayOptions(mActionBar.getDisplayOptions()
^ ActionBar.DISPLAY_SHOW_HOME
^ ActionBar.DISPLAY_SHOW_TITLE, ActionBar.DISPLAY_SHOW_HOME
| ActionBar.DISPLAY_SHOW_TITLE);
mActionBar.setDisplayShowHomeEnabled(false);
mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
mViewPager = viewPager;
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}

/** Override OnPageChangeListener start **/
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub

}

@Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
// TODO Auto-generated method stub

}

@Override
public void onPageSelected(int position) {
// TODO Auto-generated method stub
mActionBar.setSelectedNavigationItem(position);
}

/** Override OnPageChangeListener end **/

/** Override TabListener start **/
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
Object tag = tab.getTag();
for (int i = 0; i < mTabList.size(); i++) {
if (mTabList.get(i) == tag) {
mViewPager.setCurrentItem(i);
}
}
}

@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub

}

@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub

}

/** Override TabListener end **/

/** Override FragmentPagerAdapter start **/
@Override
public Fragment getItem(int position) {
// TODO Auto-generated method stub
TabInfo tab = mTabList.get(position);
if (tab.fragment == null) {
tab.fragment = Fragment.instantiate(mContext,
tab.clazz.getName(), tab.bundle);
}
return tab.fragment;
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return mTabList.size();
}

/** Override FragmentPagerAdapter end **/

private View getCustomView() {
LayoutInflater inflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
return inflater.inflate(R.layout.title_panel_layout, null);
}

public void addTab(Tab tab, Class<?> clazz, Bundle bundle) {
TabInfo tabInfo = new TabInfo(clazz, bundle);
tab.setTag(tabInfo);
tab.setTabListener(this);
mTabList.add(tabInfo);
mActionBar.addTab(tab);
notifyDataSetChanged();
}

private static final class TabInfo {
private final Class<?> clazz;
private final Bundle bundle;
Fragment fragment;

TabInfo(Class<?> clazz, Bundle bundle) {
this.clazz = clazz;
this.bundle = bundle;
}
}

}

}

里面用到的FirstFragment，SecondFragment，ThreeFragment，FourFragment分别继承Fragment，运行效果如下：



第一个就弄里个TextView，复杂的界面开发者任由发挥了，第二个和第四个都是ListView，第三个ExpandableListView，ListView的使用难点就是写适配器咯，本例是继承BaseAdapter的。ExpandableListView需要一个继承BaseExpandableListAdapter的适配器[不会的请看：ExpandableListView用法]。

2.ViewFlipper

ViewFilpper控件是系统自带控件之一，主要为在同一个屏幕间的切换及设置动画效果，且可以自动播放，用法如下：

配置文件：viewflipper_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:xyz="http://schemas.android.com/apk/res/com.xyz.vvv"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<ViewFlipper
android:id="@+id/viewflipper"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:inAnimation="@anim/slide_in"
android:outAnimation="@anim/slide_out"
android:flipInterval="2000" >

<include layout="@layout/viewflipper_one_layout" />

<include layout="@layout/viewflipper_two_layout" />

<include layout="@layout/viewflipper_three_layout" />

<include layout="@layout/viewflipper_four_layout" />

<include layout="@layout/viewflipper_five_layout" />
</ViewFlipper>

<!--
<com.xyz.vvv.PageControlView
android:id="@+id/viewflipper_indicator"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="25dip"
android:gravity="center_horizontal"
android:layout_alignParentBottom="true"
xyz:cell_width="@dimen/indicator_width"
xyz:cell_height="@dimen/indicator_height" />
-->

</RelativeLayout>

被注释的部分是指示器，那五个layout里都是一个ImageView，本例图片中画有指示器，PageControlView就不需要啦。

android:autoStart="true" <<==>> mViewFlipper.startFlipping(); //自动播放

android:flipInterval="2000" <<==>>mViewFlipper.setFilpInterval(2000); //设置View之间切换的时间间隔

android:inAnimation="@anim/slide_in", android:outAnimation="@anim/slide_out" 对应方法：mViewFlipper.setInAnimation，

mViewFlipper.setOutAnimation。

源文件：ViewFlipperActivity.java

package com.xyz.vvv.ViewFlipper;

import com.xyz.vvv.R;

import android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ViewFlipper;

public class ViewFlipperActivity extends Activity implements OnGestureListener,
OnTouchListener {

private ViewFlipper mViewFlipper;
private GestureDetector mGestureDetector;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.viewflipper_layout);

mGestureDetector = new GestureDetector(this);
mViewFlipper = (ViewFlipper) findViewById(R.id.viewflipper);
mViewFlipper.setOnTouchListener(this);
mViewFlipper.startFlipping();
}

@Override
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}

@Override
public void onShowPress(MotionEvent e) {
// TODO Auto-generated method stub

}

@Override
public boolean onSingleTapUp(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}

@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY) {
// TODO Auto-generated method stub
return false;
}

@Override
public void onLongPress(MotionEvent e) {
// TODO Auto-generated method stub

}

@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
if (e2.getX() - e1.getX() > 0) {
//mViewFlipper.showPrevious();
} else {
//mViewFlipper.showNext();
}
return true;
}

@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
mGestureDetector.onTouchEvent(event);
return true;
}

}

效果图如下：



图片太宽了，还有一张没加进来（图片来自手机QQ）。

这是ViewFlipper静态加载View，动态加载View请看：ViewFlipper动态加载View

3.ViewFlow

Viewflow 是 Android 平台上一个视图切换的效果库，非标准的得自己下载。ViewFlow 相当于 Android UI 部件提供水平滚动的 ViewGroup，使用 Adapter 进行条目绑定。这个拿来主义 ^-^

按图说话吧： 带圆点的指示器。



配置文件：circle_viewflow_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:xyz="http://schemas.android.com/apk/res/com.xyz.vvv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<org.taptwo.android.widget.ViewFlow
android:id="@+id/viewflow"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xyz:sidebuffer="3" >
</org.taptwo.android.widget.ViewFlow>

<org.taptwo.android.widget.CircleFlowIndicator
android:id="@+id/viewflowindic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:padding="10dip"
android:layout_marginBottom="10dip"
xyz:fadeOut="1000"
xyz:inactiveType="stroke" />

</FrameLayout>

源文件：CircleViewFlowActivity.java

package com.xyz.vvv.ViewFlow;

import org.taptwo.android.widget.CircleFlowIndicator;
import org.taptwo.android.widget.ViewFlow;

import com.xyz.vvv.R;

import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;

public class CircleViewFlowActivity extends Activity {

private ViewFlow mViewFlow;
private CircleFlowIndicator mIndicator = null;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle(R.string.circle_title);
setContentView(R.layout.circle_viewflow_layout);

mViewFlow = (ViewFlow) findViewById(R.id.viewflow);
mViewFlow.setAdapter(new ViewFlowAdapter(this), 0);
mIndicator = (CircleFlowIndicator) findViewById(R.id.viewflowindic);
mViewFlow.setFlowIndicator(mIndicator);
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mViewFlow.onConfigurationChanged(newConfig);
}

private class ViewFlowAdapter extends BaseAdapter {

private Context mContext;
private LayoutInflater mInflater = null;
private final int[] mImageIds = { R.drawable.cupcake, R.drawable.donut,
R.drawable.eclair, R.drawable.froyo, R.drawable.gingerbread,
R.drawable.honeycomb, R.drawable.icecream };

public ViewFlowAdapter(Context ctx) {
mContext = ctx;
mInflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return mImageIds.length;
}

@Override
public Integer getItem(int position) {
// TODO Auto-generated method stub
return mImageIds[position];
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
if (convertView == null) {
convertView = mInflater.inflate(R.layout.circle_viewflow_item_layout,
null);
}
((ImageView) convertView.findViewById(R.id.img_view))
.setImageResource(getItem(position));
return convertView;
}

}
}

ViewFlow还有其他几个例子，个人觉得用的不多，就不贴啦，感兴趣的可以下载下来研究下。

源码下载：http://download.csdn.net/detail/zhouyuanjing/4886174

~~完~~