ViewPager自定義輪播圖并解決播放沖突

首先介紹一下這篇小代碼：

注釋全面，簡單易學，适用初學者，圖檔自拟！！！

一定要将ArrayList集合&Handler機制傳到擴充卡，否則無法完成展示，也解決不了滑動沖突，代碼有點多，但是它通俗易懂啊

layout布局内寫法：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <android.support.v4.view.ViewPager
        android:id="@+id/pager01"
        android:layout_width="match_parent"
        android:layout_height="300dp" />

    <RadioGroup
        android:id="@+id/radioGroup"
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >
    </RadioGroup>

</LinearLayout>
           

Activity内寫法：

public class Frag_01 extends Fragment {
	private RadioGroup radioGroup;
	private ViewPager pager;

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		View view = inflater.inflate(R.layout.frag_01, container, false);
		// 找Viewpager控件
		radioGroup = (RadioGroup) view.findViewById(R.id.radioGroup);
		pager = (ViewPager) view.findViewById(R.id.pager01);
		
		// 圖檔資料自拟-->drawable檔案夾下
		int arr[] = { R.drawable.a1, R.drawable.a2, R.drawable.a3,
				R.drawable.a4, R.drawable.a5 };
		final ArrayList<ImageView> list = new ArrayList<ImageView>();
		for (int i = 0; i < arr.length; i++) {
			ImageView imageView = new ImageView(getActivity());
			imageView.setImageResource(arr[i]);
			list.add(imageView);
			// 生成小圓點
			RadioButton radioButton = new RadioButton(getActivity());
			radioGroup.addView(radioButton);
		}
		
		// 預設選中第一個
		radioGroup.check(radioGroup.getChildAt(0).getId());
				
		// 擴充卡
		pager.setAdapter(new MyPagerAdapter(list, handler));
		
		// 頁面切換監聽
		pager.setOnPageChangeListener(new OnPageChangeListener() {

			@Override
			public void onPageSelected(int arg0) {
				//根據頁面索引控制小圓點切換
				arg0 %= list.size();
				radioGroup.check(radioGroup.getChildAt(arg0).getId());

			}

			@Override
			public void onPageScrolled(int arg0, float arg1, int arg2) {
				// TODO Auto-generated method stub

			}

			@Override
			public void onPageScrollStateChanged(int arg0) {
				// TODO Auto-generated method stub

			}
		});
		//handler發送消息
		handler.sendEmptyMessageDelayed(0, 3000);
		return view;
	}

        //Handler機制-----------------------------------------

	Handler handler = new Handler() {
		public void handleMessage(android.os.Message msg) {
			switch (msg.what) {
			case 0:
				//擷取到下一頁的條目--->指派給目前條目
				int currentItem = pager.getCurrentItem() + 1;
				pager.setCurrentItem(currentItem);
				handler.sendEmptyMessageDelayed(0, 3000);
				break;

			default:
				break;
			}
		};
	};
}
           

PagerAdapter擴充卡的寫法：（内含滑動沖突解決方案）

public class MyPagerAdapter extends PagerAdapter {

	private ArrayList<ImageView> list;
	private Handler handler;
	//構造
	public MyPagerAdapter(ArrayList<ImageView> list, Handler handler) {
		super();
		this.list = list;
		this.handler = handler;
	}

	@Override
	public int getCount() {
		// 設定最大值
		return Integer.MAX_VALUE;
	}

	@Override
	public boolean isViewFromObject(View arg0, Object arg1) {
		//目前視圖和新加載視圖判斷-->為真才能去銷毀
		return arg0 == arg1;
	}

	// 添加視圖
        // ----該方法内包含滑動沖突----
	@Override
	public Object instantiateItem(ViewGroup container, int position) {
		position %= list.size();
		ImageView imageView = list.get(position);
		imageView.setOnTouchListener(new OnTouchListener() {

			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// 擷取事件
				int action = event.getAction();
				switch (action) {
				case MotionEvent.ACTION_MOVE:// 滑動
					handler.removeCallbacksAndMessages(null);
					break;
				case MotionEvent.ACTION_DOWN:// 按下
					handler.removeCallbacksAndMessages(null);
					break;
				case MotionEvent.ACTION_CANCEL:// 非人為操作
					handler.sendEmptyMessageDelayed(0, 3000);
					break;
				case MotionEvent.ACTION_UP:// 擡起
					handler.sendEmptyMessageDelayed(0, 3000);
					break;
				}
				return true;
			}
		});
		//擷取的圖檔存進容器
		container.addView(imageView);
		return imageView;
	}

	// 銷毀視圖
	@Override
	public void destroyItem(ViewGroup container, int position, Object object) {
		container.removeView((View) object);
	}
}