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:

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

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

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~~