ViewPager实现QQ主界面，ViewFlipper实现某些新闻应用，自动播放,很流畅

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:

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


         android:id="@+id/viewpager"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content" />

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 mTabList = new ArrayList();

         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

 "1.0" encoding="utf-8"?>
 "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: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" >

         "@layout/viewflipper_one_layout" />

         "@layout/viewflipper_two_layout" />

         "@layout/viewflipper_three_layout" />

         "@layout/viewflipper_four_layout" />

         "@layout/viewflipper_five_layout" />

        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

 "1.0" encoding="utf-8"?>
 "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" >


         android:id="@+id/viewflow"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         xyz:sidebuffer="3" >



         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" />

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。

      

        ~~完~~