可自动切换的轮播图(包含位置指示)

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/zhuxu820_/article/details/51375143

public class CarouselView extends RelativeLayout {

	public CarouselView(Context context, AttributeSet attrs) {
		super(context, attrs);
		init();
	}

	private ScheduledExecutorService executor;
	private CirclePageIndicator indicator;
	private ViewPager viewPager;
	ArrayList<ImageView> list;
	private ArrayList<? extends View> views;

	private void init() {
		LayoutInflater.from(getContext()).inflate(R.layout.layout_carouseview,
				this);

		viewPager = (ViewPager) findViewById(R.id.carouseview);
		indicator = (CirclePageIndicator) findViewById(R.id.carouseview_indicator);
	}

	float start_x = 0, start_y = 0, end_x = 0, end_y = 0;

	public void setData(ArrayList<? extends View> views,
			ViewPagerAdapter adapter) {
		this.views = views;
		viewPager.setOnTouchListener(new View.OnTouchListener() {

			@Override
			public boolean onTouch(View v, MotionEvent event) {
				int action = event.getAction();
				if (action == MotionEvent.ACTION_DOWN) {
					// toast("down");
					// Log.i("zhuxu", "down");
					start_x = event.getX();
					start_y = event.getY();
				} else if (action == MotionEvent.ACTION_UP) {
					// toast("up");
					// Log.i("zhuxu", "up");
					end_x = event.getX();
					end_y = event.getY();
				} else if (action == MotionEvent.ACTION_MOVE) {
					// Log.i("zhuxu", "move : " + "start_x : " + start_x
					// + "start_y : " + start_y + "end_x : " + end_x
					// + "end_y : " + end_y);
					// toast("move");
					// if (Math.abs(end_x - start_x) > 50 && Math.abs(end_y -
					// start_y) < 100) {
					if (Math.abs(end_x - start_x) > Math.abs(end_y - start_y)) {
						// Log.i("zhuxu", "横向移动！");
						//此句代码是为了通知他的父View 现在进行的是本控件的操作，不要对我的操作进行干扰
						v.getParent().requestDisallowInterceptTouchEvent(true);
						return false; // 是否需要View继续处理
					} else {
						//接近垂直滑动，交给父控件处理
						v.getParent().requestDisallowInterceptTouchEvent(false);
						// Log.i("zhuxu", "纵向移动！");
						return true;  // 是否需要View继续处理
					}
				}
				return false;
			}
		});

		viewPager.setAdapter(adapter);
		indicator.setOnPageChangeListener(new OnPageChangeListener() {

			@Override
			public void onPageSelected(int arg0) {
				isChanged = true;
			}

			@Override
			public void onPageScrolled(int arg0, float arg1, int arg2) {

			}

			@Override
			public void onPageScrollStateChanged(int arg0) {

			}
		});
		indicator.setViewPager(viewPager);

	}

	public ViewPager getCarouselView() {
		return viewPager;
	}

	public void startCarouse() {
		executor = Executors.newSingleThreadScheduledExecutor();
		executor.scheduleWithFixedDelay(new ViewpagerTask(),
				2,3, TimeUnit.SECONDS);
	}

	public void cancleCarouse() {
		if (executor != null)
			executor.shutdown();
	}

	private int currentItem = 0;
	private boolean isChanged = false;

	private class ViewpagerTask implements Runnable {

		@Override
		public void run() {
			if (isChanged) {
				isChanged = !isChanged;
			} else {
				currentItem = (viewPager.getCurrentItem() + 1) % views.size();
				post(new Runnable() {
					public void run() {
						viewPager.setCurrentItem(currentItem);
					}
				});
			}
		}
	}
}