package com.weikou.wpc.superad.widget;
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import android.content.Context;
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import android.support.v4.view.PagerAdapter;
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import android.support.v4.view.ViewPager;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.ViewGroup;
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public class MyViewPager extends ViewPager implements Runnable {
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private PagerAdapter pagerAdapter;
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private static final int POST_DELAYED_TIME = 1000 * 5;
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// 鎵嬫寚鏄惁鏀惧湪涓婇潰
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private boolean touching;
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// 鏇存柊鏁版嵁闇�鑾峰緱myPagerAdapter
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private PagerAdapter myPagerAdapter;
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public MyViewPager(Context context, AttributeSet attrs) {
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super(context, attrs);
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// postDelayed(this, POST_DELAYED_TIME);
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}
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// 瀵箂etAdapter鐨勬暟鎹繘琛屽寘瑁�
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private class MyPagerAdapter extends PagerAdapter {
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private PagerAdapter pa;
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public MyPagerAdapter(PagerAdapter pa) {
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this.pa = pa;
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}
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@Override
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// 鍏抽敭涔嬩竴:淇敼Count闀垮害
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public int getCount() {
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return pa.getCount() > 1 ? pa.getCount() + 2 : pa.getCount();
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}
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@Override
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// 杩欓噷鏄叧閿箣浜�淇敼绱㈠紩(濡傛灉涓嶈�铏戝唴瀹归棶棰樺彲浠ュ叏閮ㄥ姞杞借繘鏁扮粍鐒跺悗鎿嶄綔鏇寸畝鍗�
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public Object instantiateItem(ViewGroup container, int position) {
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if (position == 0) {
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return pa.instantiateItem(container, pa.getCount() - 1);
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} else if (position == pa.getCount() + 1) {
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return pa.instantiateItem(container, 0);
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} else {
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return pa.instantiateItem(container, position - 1);
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}
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}
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@Override
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public void destroyItem(ViewGroup container, int position, Object object) {
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pa.destroyItem(container, position, object);
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}
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@Override
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public boolean isViewFromObject(View arg0, Object arg1) {
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return pa.isViewFromObject(arg0, arg1);
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}
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}
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// 鍖呰setOnPageChangeListener鐨勬暟鎹�
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private class MyOnPageChangeListener implements OnPageChangeListener {
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private OnPageChangeListener listener;
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// 鏄惁宸茬粡鎻愬墠瑙﹀彂浜哋nPageSelected浜嬩欢
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private boolean alreadyTriggerOnPageSelected;
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public MyOnPageChangeListener(OnPageChangeListener listener) {
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this.listener = listener;
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}
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@Override
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// 鍏抽敭涔嬩笁:
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public void onPageScrollStateChanged(int arg0) {
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if (arg0 == SCROLL_STATE_IDLE) {
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if (getCurrentItem() + 1 == 0) {
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setCurrentItem(pagerAdapter.getCount() - 1, false);
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} else if (getCurrentItem() + 1 == pagerAdapter.getCount() + 1) {
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setCurrentItem(0, false);
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}
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}
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listener.onPageScrollStateChanged(arg0);
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}
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@Override
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public void onPageScrolled(int arg0, float arg1, int arg2) {
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listener.onPageScrolled(arg0, arg1, arg2);
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}
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@Override
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// 鍏抽敭鍥�
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public void onPageSelected(int arg0) {
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if (arg0 == 0) {
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listener.onPageSelected(pagerAdapter.getCount() - 1);
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alreadyTriggerOnPageSelected = true;
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} else if (arg0 == pagerAdapter.getCount() + 1) {
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listener.onPageSelected(0);
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alreadyTriggerOnPageSelected = true;
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} else {
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if (!alreadyTriggerOnPageSelected) {
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listener.onPageSelected(arg0 - 1);
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}
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alreadyTriggerOnPageSelected = false;
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}
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}
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}
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@Override
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public void setOnPageChangeListener(OnPageChangeListener listener) {
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super.setOnPageChangeListener(listener == null ? null
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: new MyOnPageChangeListener(listener));
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}
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@Override
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public void setAdapter(PagerAdapter arg0) {
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myPagerAdapter = arg0 == null ? null : new MyPagerAdapter(arg0);
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super.setAdapter(myPagerAdapter);
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if (arg0 != null && arg0.getCount() != 0) {
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setCurrentItem(0, false);
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}
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this.pagerAdapter = arg0;
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}
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@Override
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// 鍏煎PageIndicator
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public PagerAdapter getAdapter() {
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return pagerAdapter;
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}
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public PagerAdapter getMyPagerAdapter() {
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return myPagerAdapter;
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}
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@Override
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public int getCurrentItem() {
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return super.getCurrentItem() - 1;
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}
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@Override
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public void setCurrentItem(int item) {
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setCurrentItem(item, true);
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}
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@Override
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public void setCurrentItem(int item, boolean smoothScroll) {
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super.setCurrentItem(item + 1, smoothScroll);
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}
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@Override
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// 鑷姩婊氬姩鍏抽敭
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public void run() {
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if (getAdapter() != null && getAdapter().getCount() > 1 && !touching) {
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setCurrentItem(getCurrentItem() + 1, true);
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}
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postDelayed(this, POST_DELAYED_TIME);
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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if (event.getAction() == MotionEvent.ACTION_DOWN) {
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this.touching = true;
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} else if (event.getAction() == MotionEvent.ACTION_UP
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|| event.getAction() == MotionEvent.ACTION_CANCEL) {
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this.touching = false;
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}
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return super.onTouchEvent(event);
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}
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}
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