ViewPager自定义轮播图

首先介绍一下这篇小代码：
注释全面，简单易学，适用初学者，图片自拟！！！

一定要将ArrayList集合&Handler机制传到适配器，否则无法完成展示，也解决不了滑动冲突，代码有点多，但是它通俗易懂啊

layout布局内写法：

<?  version=\"1.0\" encoding=\"utf-8\"?>
<LinearLayout  ns: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内写法：

import java.util.ArrayList;
import com.bwie.exam.R;
import com.bwie.exam.adapter.MyPagerAdapter;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;

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);
		
		// 图片数据自拟-->drawable文件夹下
		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);
			// 生成小圆点
			RadioButton radioButton = new RadioButton(getActivity());
			radioGroup.addView(radioButton);
		}
		
		// 默认选中第一个
				radioGroup.check(radioGroup.getChildAt(0).getId());
				
		// 适配器
		pager.setAdapter(new MyPagerAdapter(list, handler));
		
		// 页面切换监听
		pager.setOnPageChangeListener(new OnPageChangeListener() {

			@Override
			public void onPageSelected(int arg0) {
				//根据页面索引控制小圆点切换
				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发送消息
		handler.sendEmptyMessageDelayed(0, 3000);
		return view;
	}

        //Handler机制-----------------------------------------

	Handler handler = new Handler() {
		public void handleMessage(android.os.Message msg) {
			switch (msg.what) {
			case 0:
				//获取到下一页的条目--->赋值给当前条目
				int currentItem = pager.getCurrentItem() + 1;
				pager.setCurrentItem(currentItem);
				handler.sendEmptyMessageDelayed(0, 3000);
				break;

			default:
				break;
			}
		};
	};
}

PagerAdapter适配器的写法：（内含滑动冲突解决方案）

import java.util.ArrayList;

import android.os.Handler;
import android.support.v4.view.PagerAdapter;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.ImageView;

public class MyPagerAdapter extends PagerAdapter {

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

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

	@Override
	public boolean isViewFrom (View arg0,   arg1) {
		//当前视图和新加载视图判断-->为真才能去销毁
		return arg0 == arg1;
	}

	// 添加视图
        // ----该方法内包含滑动冲突----
	@Override
	public   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) {
				// 获取事件
				int action = event.getAction();
				switch (action) {
				case MotionEvent.ACTION_MOVE:// 滑动
					handler.removeCallbacksAndMessages(null);
					break;
				case MotionEvent.ACTION_DOWN:// 按下
					handler.removeCallbacksAndMessages(null);
					break;
				case MotionEvent.ACTION_CANCEL:// 非人为操作
					handler.sendEmptyMessageDelayed(0, 3000);
					break;
				case MotionEvent.ACTION_UP:// 抬起
					handler.sendEmptyMessageDelayed(0, 3000);
					break;
				}
				return true;
			}
		});
		//获取的图片存进容器
		container.addView(imageView);
		return imageView;
	}

	// 销毁视图
	@Override
	public void destroyItem(ViewGroup container, int position,    ) {
		container.removeView((View)  );
	}
}