ViewPager自动轮播广告

/* * AUTHOR：Yolanda * * DESCRIPTION：create the File, and add the content. * * Copyright © ZhiMore. All Rights Reserved * */ package com.yolanda.autoviewpager; import android.content.Context; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.util.AttributeSet; /** * Created by Yolanda on 2016/5/3. * * @author Yolanda; QQ: 757699476 */ public class AutoPlayViewPager extends ViewPager { public AutoPlayViewPager(Context context) { super(context); } public AutoPlayViewPager(Context context, AttributeSet attrs) { super(context, attrs); } /** * 播放时间 */ private int showTime = 3 * 1000; /** * 滚动方向 */ private Direction direction = Direction.LEFT; /** * 设置播放时间，默认3秒 * * @param showTimeMillis 毫秒 */ public void setShowTime(int showTimeMillis) { this.showTime = showTime; } /** * 设置滚动方向，默认向左滚动 * * @param direction 方向 */ public void setDirection(Direction direction) { this.direction = direction; } /** * 开始 */ public void start() { stop(); postDelayed(player, showTime); } /** * 停止 */ public void stop() { removeCallbacks(player); } /** * 播放上一个 */ public void previous() { if (direction == Direction.RIGHT) { play(Direction.LEFT); } else if (direction == Direction.LEFT) { play(Direction.RIGHT); } } /** * 播放下一个 */ public void next() { play(direction); } /** * 执行播放 * * @param direction 播放方向 */ private synchronized void play(Direction direction) { PagerAdapter pagerAdapter = getAdapter(); if (pagerAdapter != null) { int count = pagerAdapter.getCount(); int currentItem = getCurrentItem(); switch (direction) { case LEFT: currentItem++; if (currentItem > count) currentItem = 0; break; case RIGHT: currentItem--; if (currentItem < 0) currentItem = count; break; } setCurrentItem(currentItem); } start(); } /** * 播放器 */ private Runnable player = new Runnable() { @Override public void run() { play(direction); } }; public enum Direction { /** * 向左行动，播放的应该是右边的 */ LEFT, /** * 向右行动，播放的应该是左边的 */ RIGHT } @Override protected void onFinishInflate() { super.onFinishInflate(); addOnPageChangeListener(new OnPageChangeListener() { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { } @Override public void onPageScrollStateChanged(int state) { if (state == SCROLL_STATE_IDLE) start(); else if (state == SCROLL_STATE_DRAGGING) stop(); } }); } }