<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context="com.cqytjr.www.cheji.Activity.BigImageActivity"><android.support.v4.view.ViewPagerandroid:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/viewpager"></android.support.v4.view.ViewPager><LinearLayoutandroid:layout_width="wrap_content"android:layout_height="40dp"android:id="@+id/ll_pager_num"android:orientation="horizontal"android:layout_alignParentBottom="true"android:layout_marginBottom="45dp"android:layout_centerHorizontal="true"></LinearLayout></RelativeLayout>

public class BigImageActivity extends BaseActivity {private ViewPager pager;private List <ImageView>list;private LinearLayout mNumLayout;private List<Button>pagerList;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_big_image);initView();}@Overrideprotected void initView() {super.initView();initWithData();mNumLayout = (LinearLayout) findViewById(R.id.ll_pager_num);pagerList = new ArrayList<Button>();Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_page_indicator);for (int i = 0; i < list.size(); i++) {Button bt = new Button(this);LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));//为小圆点左右添加间距params.leftMargin = 10;params.rightMargin = 10;//手动给小圆点一个大小params.height = bitmap.getWidth();params.width = bitmap.getHeight();//            bt.setLayoutParams(new ViewGroup.LayoutParams(bitmap.getWidth(),bitmap.getHeight()));
//            bt.setBackgroundResource(R.drawable.ic_page_indicator);mNumLayout.addView(bt,params);pagerList.add(bt);}pager = (ViewPager)findViewById(R.id.viewpager);PagerAdapter adapter = new PagerAdapter() {@Overridepublic int getCount() {return list.size();}@Overridepublic boolean isViewFromObject(View view, Object object) {return view == object;}@Overridepublic Object instantiateItem(ViewGroup container, int position){container.addView(list.get(position));return list.get(position);}@Overridepublic void destroyItem(ViewGroup container, int position,Object object){container.removeView(list.get(position));}};pager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {@Overridepublic void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}@Overridepublic void onPageSelected(int position) {choseItem(position);}@Overridepublic void onPageScrollStateChanged(int state) {}});pager.setAdapter(adapter);pager.setCurrentItem(0);choseItem(0);}public void initWithData(){int[]strings = {R.drawable.ic_test_0,R.drawable.ic_test_1,R.drawable.ic_test_2,R.drawable.ic_test_3,R.drawable.ic_test_4,R.drawable.ic_test_5,R.drawable.ic_test_6};list = new ArrayList<ImageView>();for (int i=0;i<strings.length;i++){ImageView imageView = new ImageView(getApplicationContext());imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);imageView.setImageResource(strings[i]);list.add(imageView);}}private void choseItem(int i){Log.d("BigImageActivity",i+"===========");for (Button button:pagerList){button.setBackgroundResource(R.drawable.ic_page_indicator);}Button button = pagerList.get(i);button.setBackgroundResource(R.drawable.ic_page_indicator_focused);}}