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public class BigPicActivity extends BaseActivity implements BigPicInterface {    @Bind(R.id.title_content)    TextView titleContent;    @Bind(R.id.title_return)    ImageView titleReturn;    @Bind(R.id.search)    ImageView search;    @Bind(R.id.extendedVP)    ExtendedViewPager extendedVP;    @Bind(R.id.tv_numcount)    TextView tvNumcount;    @Bind(R.id.tv_describe)    TextView tv_describe;    private String type = "eighteen"; //请求类型 six ： 6 张 eighteen ： 18 张    private User user;    private int position;    private BigPicData bigPicData;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_bigpic);        position = getIntent().getIntExtra(ActivityHelp.KEY_POSITION, 0);        initData();    }    private void initView() {        tv_describe.setMovementMethod(new ScrollingMovementMethod());        extendedVP.setAdapter(new BigPicAdapter(bigPicData.getData(),appContext));        extendedVP.setCurrentItem(position);        extendedVP.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {            @Override            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {            }            @Override            public void onPageSelected(int position) {                setShoePerNum(position);            }            @Override            public void onPageScrollStateChanged(int state) {            }        });        setShoePerNum(position);    }  private void initData() {        BigPicPresenter bigPicPresenter = new BigPicPresenter(DataManager.getInstance());        bigPicPresenter.attachView(this);        bigPicPresenter.loadData();    }      @Override    public void onLoadDataSuccess(BigPicData bigPicData) {        if (bigPicData.getStatus() == Constant.SUCCESS) {            this.bigPicData = bigPicData;            initView();        }else{            MyToast.showShort(bigPicData.getMsg());        }    }        private void setShoePerNum(int num) {        if (bigPicData.getData() != null) {            String title = bigPicData.getData().get(num).getTitle();            titleContent.setText(title);            tv_describe.setText(bigPicData.getData().get(num).getDescription());            num++;            if (num <= 0)                num = 1;            tvNumcount.setText(num + "/" + bigPicData.getData().size());        }    }

}

//Adapter方法

public class BigPicAdapter extends PagerAdapter {    private List
   
     Data;    private AppContext appContext;    public BigPicAdapter(List
    
      Data, AppContext appContext) {        this.Data = Data;        this.appContext = appContext;    }    @Override    public int getCount() {        return Data.size();    }    @Override    public boolean isViewFromObject(View view, Object object) {        return view == object;    }    @Override    public Object instantiateItem(ViewGroup container, int position) {        TouchImageView img = new TouchImageView(appContext);        img.setScaleType(ImageView.ScaleType.FIT_CENTER);        String url = Data.get(position).getPictureUrl();        if (!TextUtils.isEmpty(url)&&url.startsWith("http")) {            ImageLoader.getInstance().displayImage(url, img, appContext.options);        } else {            ImageLoader.getInstance().displayImage("file://" + url, img, appContext.options);        }        container.addView(img, RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);        return img;    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        container.removeView((View) object);    }}
    
   

//XML方法

//自定义方法

package com.jzg.jcpt.view;import android.content.Context;import android.support.v4.view.ViewPager;import android.util.AttributeSet;import android.view.View;/** * 支持放大缩小image的viewpager */public class ExtendedViewPager extends ViewPager {    public ExtendedViewPager(Context context) {        super(context);    }    public ExtendedViewPager(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {        if (v instanceof TouchImageView) {            //            // canScrollHorizontally is not supported for Api < 14. To get around this issue,            // ViewPager is extended and canScrollHorizontallyFroyo, a wrapper around            // canScrollHorizontally supporting Api >= 8, is called.            //            return ((TouchImageView) v).canScrollHorizontallyFroyo(-dx);        } else {            return super.canScroll(v, checkV, dx, x, y);        }    }}

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