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AndroidUI 卡片式折叠交互效果实现

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最近小猿在改进之前写过的学校教务系统APP的UI界面的时候,发现了一个有趣的Android UI——卡片式折叠交互CardStackView,该View是在GitHub上找到的,但是该View的主人没有告诉我如何使用,小猿研究了半天,在此,将其简单的使用步骤阐述一下:

CardViewStack的GitHub地址https://github.com/loopeer/CardStackView

使用步骤:

1.在Android studio中dependencies里添加依赖

dependencies {
    compile 'com.loopeer.library:cardstack:1.0.2'}

2.自定义一个单个卡片的item:

LinearLayout
    android:id="@+id/linear_list_card_item"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:stackHeaderHeight="100dp">

    <FrameLayout
        android:id="@+id/frame_list_card_item"
        android:layout_width="match_parent"
        android:layout_height="80dp"
        android:background="@drawable/course_item_1">

        <TextView
            android:id="@+id/text_list_card_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"
            android:textColor="#fff"
            android:textSize="24sp"
            android:textStyle="bold"
            tools:text="12"/>
    </FrameLayout>

    <LinearLayout
        android:id="@+id/container_list_content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:animateLayoutChanges="true">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recycler"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

        </android.support.v7.widget.RecyclerView>
    </LinearLayout>

</LinearLayout>

3.在主布局里使用CardStackView:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#f0f0f0">

    <com.loopeer.cardstack.CardStackView        android:id="@+id/stackview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clipToPadding="false"
        android:padding="6dp">

    </com.loopeer.cardstack.CardStackView></LinearLayout>

4.写一个TestStackAdapter(GitHub博主上给出了个Adapter的demo,里面有卡片的三种样式:

  1. ColorItemViewHolder :显示卡片正常样式

  2. ColorItemLargeHeaderViewHolder :卡片的头比正常显示的大

  3. ColorItemWithNoHeaderViewHolder :不显示卡片的头,只显示内容)

TestStackAdapter代码有点长,但是理解起来不难,因为它非常像RecyclerView.Adapter<>,因为它是继承自CardStackView.Adapter<>,我将部分主要代码讲一下:

1.onCreateView():加载卡片的item布局(三种样式可以加载):

@Override
    protected CardStackView.ViewHolder onCreateView(ViewGroup parent, int viewType) {
        View view;        switch (viewType) {            case R.layout.list_card_item_larger_header:
                view = getLayoutInflater().inflate(R.layout.list_card_item_larger_header, parent, false);                return new ColorItemLargeHeaderViewHolder(view);            case R.layout.list_card_item_with_no_header:
                view = getLayoutInflater().inflate(R.layout.list_card_item_with_no_header, parent, false);                return new ColorItemWithNoHeaderViewHolder(view);            default:
                view = getLayoutInflater().inflate(R.layout.list_card_item, parent, false);                return new ColorItemViewHolder(view);
        }
    }

2.getItemViewType():返回每个item的布局样式,在这个Adapter里,都返回了统一的样式:

@Override
    public int getItemViewType(int position) {        if (position == 6) {//TODO TEST LARGER ITEM
            return R.layout.list_card_item_larger_header;
        } else if (position == 10) {            return R.layout.list_card_item_with_no_header;
        }else {            return R.layout.list_card_item;
        }
    }

3.onItemExpand(boolean b):在这里判断卡片是否被点击,true就将卡片展开:

 @Override
        public void onItemExpand(boolean b) {
            mContainerContent.setVisibility(b ? View.VISIBLE : View.GONE);
        }

4.onBind(Integer data, int position):根据item的position来加载卡片内的内容:

public void onBind(Integer data, int position) {            mLayout.getBackground().setColorFilter(ContextCompat.getColor(getContext(), data), PorterDuff.Mode.SRC_IN);            mTextTitle.setText(String.valueOf(position));
        }

5.bindView(Integer data, int position, CardStackView.ViewHolder holder):调用onBind()来加载布局:

@Override
    public void bindView(Integer data, int position, CardStackView.ViewHolder holder) {        if (holder instanceof ColorItemLargeHeaderViewHolder) {
            ColorItemLargeHeaderViewHolder h = (ColorItemLargeHeaderViewHolder) holder;
            h.onBind(data, position);
        }        if (holder instanceof ColorItemWithNoHeaderViewHolder) {
            ColorItemWithNoHeaderViewHolder h = (ColorItemWithNoHeaderViewHolder) holder;
            h.onBind(data, position);
        }        if (holder instanceof ColorItemViewHolder) {
            ColorItemViewHolder h = (ColorItemViewHolder) holder;
            h.onBind(data, position);
        }
    }

5.在MainActivity中将CardStackView初始化,因为我是在Fragment中写的,在此,附上我的Fragment中的代码:

public class ProjectFragment extends Fragment implements CardStackView.ItemExpendListener{

    private CardStackView cardStackView;    private TestStackAdapter testStackAdapter;    private static Integer[] item = new Integer[]{R.color.team1,R.color.team2,R.color.team3,
            R.color.team4,R.color.team5,R.color.team6,R.color.team7,R.color.team8};    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.project_fragment,container,false);
        initWight(view);        return view;
    }    private void initWight(View view) {
        cardStackView = (CardStackView) view.findViewById(R.id.stackview);
        testStackAdapter = new TestStackAdapter(getContext());
        cardStackView.setAdapter(testStackAdapter);
        cardStackView.setItemExpendListener(this);

        handler.postDelayed(new Runnable() {            @Override
            public void run() {
                testStackAdapter.updateData(Arrays.asList(item));
            }
        },200);
    }    @Override
    public void onItemExpend(boolean expend) {

    }
}

1.先初始化一组颜色的数组,因为TestStackAdapter中根据传入的颜色数组来将卡片的片头附上颜色:

private static Integer[] item = new Integer[]{R.color.team1,R.color.team2,R.color.team3,
            R.color.team4,R.color.team5,R.color.team6,R.color.team7,R.color.team8};

2.利用handler来进行延时更新卡片内的内容,先将CardStackView实例化,在利用.updateData()来进行CardStackView的内容更新:

handler.postDelayed(new Runnable() {            @Override
            public void run() {
                testStackAdapter.updateData(Arrays.asList(item));
            }
        },200);

3.CardStackView的item展开监听事件(通过implement CardStackView.ItemExpendListener):

cardStackView.setItemExpendListener(this);
@Override
    public void onItemExpend(boolean expend) {

    }

CardStackView的简单使用就到此了,如果对此有兴趣的话,可以自行研究一下源码,也可自己写个CardStackAdapter,因为源代码的TestStackAdapter是继承自CardStackView.Adapter<>的

原文链接:http://www.apkbus.com/blog-822715-77192.html


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