如何添加的ImageView viewPager在ListFragment在android系统？ [英] How to add ImageView viewPager in ListFragment in android?

问题描述

我有一个 ViewPager 在的ListView android的屏幕：

I have a ViewPager inside ListView in android screen:

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
style="@style/Base.TextAppearance.AppCompat.Menu"
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" >

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_alignParentTop="true" />
    </RelativeLayout>

<TextView
    android:id="@+id/textView"
    android:layout_width="match_parent"
    android:layout_height="55dip"
    android:layout_alignParentEnd="false"
    android:layout_alignParentStart="false"
    android:layout_below="@+id/imageView"
    android:autoText="false"
    android:background="#FFFFFF"
    android:gravity="center_vertical"
    android:padding="10dp"
    android:text="08/01    MidTown"
    android:textColor="#21252D"
    android:textSize="20sp" />
</RelativeLayout>

我ListFragment类

本类调用 ArrayAdapter 来将数据加载到上述的TextView 。

public class FoodTabFragment extends ListFragment {
  @Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    getListView().setDivider(null);
    final AppDelegate contextScope = (AppDelegate) getActivity().getApplicationContext();
    FoodListAdapter adapt = new FoodListAdapter(getActivity().getApplicationContext(), R.layout.layout_listing_food, contextScope.foodList);
    setListAdapter(adapt);
}
}

FoodListAdapter

public class FoodListAdapter extends ArrayAdapter<Food> {
private Context context;
private List<Food> foodList;

public FoodListAdapter(Context context, int resource, List<Food> objects) {
    super(context, resource, objects);
    this.context = context;
    this.roomList = objects;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    if (null == convertView) {
        convertView = inflater.inflate(R.layout.layout_listing_food, parent, false);
    }
    return convertView;
}

SlidingImageAdapter

public class SlidingImageAdapter extends PagerAdapter {


private ArrayList<Integer> IMAGES;
private LayoutInflater inflater;
private Context context;


public SlidingImageAdapter(Context context, ArrayList<Integer> IMAGES) {
    this.context = context;
    this.IMAGES=IMAGES;
    inflater = LayoutInflater.from(context);
}

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

@Override
public int getCount() {
    return IMAGES.size();
}

@Override
public Object instantiateItem(ViewGroup view, int position) {
    View imageLayout = inflater.inflate(R.layout.framelayout_listing_image_slider, view, false);
    assert imageLayout != null;
    final ImageView imageView = (ImageView) imageLayout
            .findViewById(R.id.image);
    imageView.setImageResource(IMAGES.get(position));
    view.addView(imageLayout, 0);
    return imageLayout;
}

问题

我该如何合并 slidingImageAdapter INT FoodListAdapter 。所以，我可以添加 viewpager 在列表视图在布局类？

Question

How can I merge slidingImageAdapter int FoodListAdapter. So that I can add viewpager in Listview in layout class?

推荐答案

在一般我会建议你移动到的 RecyclerView 。

In general I would suggest you to move to RecyclerView.

下面你可以找到你的当前实现简单的解决方案。

Below you can find simple solution for your current implementation.

更改为 FoodListAdapter ：

改变食物的清单来图，其中食物是标识和相关SlidingImageAdapter就是价值。

Change list of food to map, where Food is id and related SlidingImageAdapter is value.

private Map<Food, SlidingImageAdapter> foodMap;

这将避免适配器的再创造每个getView调用。

This will avoid recreating of adapter every getView call.

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    if (null == convertView) {
        convertView = inflater.inflate(R.layout.layout_listing_food, parent, false);
    }
    Food food = getItem(position);
    SlidingImageAdapter adapter; 
    // adapter creation or reuse
    if (foodMap.contains(food)) {
        adapter = foodMap.get(food);
    } else {
        adapter = new SlidingImageAdapter(...);
        foodMap.put(food, adapter);
    }
    convertView.findViewById(R.id.pager).setAdapter(adapter); 
    return convertView;
}

P.S。不要忘了覆盖散code（）和等于（对象o）在食物项。

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