Question

我将ViewPager与PagerAdapter一起用于图片。代码在这里

PagerAdapter

public class MediaPagerAdapter extends PagerAdapter {

        private final LayoutInflater mLayoutInflater;
        private List<String> mediaItems = new ArrayList<>();
        private Context context;

        public MediaPagerAdapter(List<String> mediaItems,
                                    Context context) {
            this.mediaItems = mediaItems;
            this.context = context;
            mLayoutInflater = LayoutInflater.from(context);
        }


        @Override
        public int getCount() {
            return mediaItems != null ? mediaItems.size() : 0;
        }

        @Override
        public View instantiateItem(ViewGroup container, final int position) {
            View view = mLayoutInflater.inflate(R.layout.item, container, false);
            ImageView imageView = (ImageView) view.findViewById(R.id.image);
 Picasso.with(context).load(mediaItems.get(position)).placeholder(R.drawable
                    .placeholder2).into(imageView);
            container.addView(view);
            return view;
        }

        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            View view = (View) object;
            container.removeView(view);
        }

        @Override
        public boolean isViewFromObject(View view, Object object) {
            return view == object;
        }

    }

它在寻呼机中成功加载了2个项目。但是当我滚动到第三个项目时它变得空白。没有内容显示在那里，当我回去时，之前的项目也被破坏了。我研究了很多，但没有找到任何解决方案。如果有人也遇到这种问题并解决了，请在此处提出解决方案。谢谢，

编辑：2016年5月18日

我使用Swipe-Desk Library在卡片上工作，并在每张卡片中为ViewPager充气照片。代码在这里

主xml文件

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

    <com.daprlabs.cardstack.SwipeDeck
        android:id="@+id/swipe_deck"
        android:layout_width="match_parent"
        android:layout_height="480dp"
        android:padding="20dp"
        swipedeck:card_spacing="10dp"
        swipedeck:max_visible="3"
        swipedeck:render_above="true"
        swipedeck:rotation_degrees="15" />

</com.daprlabs.cardstack.SwipeFrameLayout>

SwipeDeckAdapter

public class SwipeDeckAdapter extends BaseArrayAdapter {
    private Context context;

    public SwipeDeckAdapter(List<String> data, Context context) {
        super(context, R.layout.card_layout, data);
        this.context = context;
    }


    @Override
    public View newView(Context context, int position, ViewGroup parent) {
        View v = getLayoutInflater().inflate(getLayoutResId(), parent, false);
        ViewHolder viewHolder = new ViewHolder(v, listener);
        v.setTag(viewHolder);
        return v;
    }

    @Override
    public void bindView(final View view, Context context, String item, int position) {
        final ViewHolder viewHolder = (ViewHolder) view.getTag();
        final List<String> list = new ArrayList<>();

     list.add("http://i.huffpost.com/gen/1279675/images/o-CAREER-facebook.jpg");
        list.add("http://clickker.in/wp-content/uploads/2015/10/ambitious.jpg");
        list.add("http://clickker.in/wp-content/uploads/2015/10/ambitious.jpg");

        MediaPagerAdapter mediaPagerAdapter = new MediaPagerAdapter(list, context);
        viewHolder.viewPager.setAdapter(mediaPagerAdapter);
    }


    public class ViewHolder {
        public ViewPager viewPager;

        public ViewHolder(View view) {
            viewPager = (ViewPager) view.findViewById(R.id.view_pager);
        }
    }
}

主要活动

public class MainActivity extends ToolBarActivity
         {

    private SwipeDeckAdapter mAdapter;
    private SwipeDesk cardStack;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        cardStack = (SwipeDesk) findViewById(R.id.swipe_deck);
        testData = new ArrayList<>();
        testData.add("0");
        testData.add("1");
        testData.add("2");
        testData.add("3");
        testData.add("4");
        testData.add("6");
        testData.add("7");

        mAdapter = new SwipeDeckAdapter(testData, this);
        cardStack.setAdapter(mAdapter);
    }

}

你们都知道我在编辑之前解释的剩余故事。

谢谢，

如果项目多于一个，则项目内容不会显示在视图寻呼机上

0 个答案: