android ViewPager 左右双向滑动 实例源码

【核心代码】

package com.wh.viewpagermove;

import java.util.ArrayList;
import java.util.List;
import java.util.Timer;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ImageView;

public class MainActivity extends Activity
{

	List<View> mlist = new ArrayList<View>();
	AdvAdapter mAdapterPIC;
	int count = 0;
	ViewPager viewPager;
	Timer timer;
	Thread mThread;

	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		viewPager = (ViewPager) this.findViewById(R.id.mviewpager);
		ImageView img1 = new ImageView(this);
		ImageView img2 = new ImageView(this);
		ImageView img3 = new ImageView(this);
		ImageView img4 = new ImageView(this);
		img1.setImageResource(R.drawable.logo_qq);
		img2.setImageResource(R.drawable.logo_qzone);
		img3.setImageResource(R.drawable.logo_shortmessage);
		img4.setImageResource(R.drawable.logo_wechat);
		mlist.add(img1);
		mlist.add(img2);
		mlist.add(img3);
		mlist.add(img4);
		mAdapterPIC = new AdvAdapter(mlist);
		viewPager.setAdapter(mAdapterPIC);
		// viewPager.setOnPageChangeListener(mOnPageChangeListener);
		viewPager.setCurrentItem(5000);
		// 增加手势
		viewPager.setOnTouchListener(mOnTouchListener);
		mThread = new Thread(runnable);
		mThread.start();
	}

	OnTouchListener mOnTouchListener = new OnTouchListener()
	{

		@Override
		public boolean onTouch(View v, MotionEvent event)
		{
			switch (event.getAction())
			{
			case MotionEvent.ACTION_UP:
				Message message = new Message();
				message.what = 3;
				handler.sendMessage(message);
				break;
			case MotionEvent.ACTION_DOWN:
				Log.i("hh", "DOWN");
				Message message1 = new Message();
				message1.what = 2;
				handler.sendMessage(message1);
				break;
			default:
				break;

			}
			return false;
		}
	};

	Runnable runnable = new Runnable()
	{

		@Override
		public void run()
		{
			Message message = new Message();
			message.what = 1;
			handler.sendMessage(message);

		}
	};

	Handler handler = new Handler()
	{
		public void handleMessage(Message msg)
		{
			switch (msg.what)
			{
			case 1:
				viewPager.setCurrentItem(viewPager.getCurrentItem()   1);
				handler.removeCallbacks(runnable);
				handler.postDelayed(runnable, 3000);
				break;
			case 2:
				handler.removeCallbacks(runnable);
				break;
			case 3:
				handler.removeCallbacks(runnable);
				handler.postDelayed(runnable, 3000);
				break;
			}
			super.handleMessage(msg);
		}
	};

	// 向右边滑动无限循环
	private final class AdvAdapter extends PagerAdapter
	{
		private List<View> views = null;

		public AdvAdapter(List<View> views)
		{
			this.views = views;
			count = views.size();
		}

		@Override
		public void destroyItem(View arg0, int arg1, Object arg2)
		{
			((ViewPager) arg0).removeView(views.get(arg1 % views.size()));
		}

		@Override
		public void finishUpdate(View arg0)
		{

		}

		@Override
		public int getCount()
		{
			return Integer.MAX_VALUE;
		}

		@Override
		public Object instantiateItem(View arg0, int arg1)
		{

			try
			{
				((ViewPager) arg0).addView(views.get(arg1 % views.size()), 0);
			} catch (Exception e)
			{
			}

			return views.get(arg1 % views.size());

		}

		@Override
		public boolean isViewFromObject(View arg0, Object arg1)
		{
			return arg0 == arg1;
		}

		@Override
		public void restoreState(Parcelable arg0, ClassLoader arg1)
		{

		}

		@Override
		public Parcelable saveState()
		{
			return null;
		}

		@Override
		public void startUpdate(View arg0)
		{

		}

	}

}