BaseRecyclerViewAdapterHelper使用总结

BaseRecyclerViewAdapterHelper使用总结

项目地址：https://github.com/CymChad/BaseRecyclerViewAdapterHelper

添加依赖

先在 build.gradle(Project:XXXX) 的 repositories 添加:

1. allprojects {
2. repositories {
3. ...
4. maven { url "https://jitpack.io" }
5. }
6. }

然后在 build.gradle(Module:app) 的 dependencies 添加:

1. compile 'com.github.CymChad:BaseRecyclerViewAdapterHelper:VERSION_CODE'

用这里的真实发行版本号, 替换 VERSION_CODE。
注意：两个都必须要写，要不然无法加载成功。

功能一览

• 优化Adapter代码：和原始的adapter相对，减少70%的代码量。
  
• 添加Item事件：Item的点击/长按事件，Item子控件的点击/长按事件
  
• 添加列表加载动画： 一行代码轻松切换5种默认动画。
  
• 添加头部、尾部： 一行代码搞定，感觉又回到ListView时代。
  
• 自动加载：上拉加载无需监听滑动事件,可自定义加载布局，显示异常提示，自定义异常提示。
  
• 添加分组：随心定义分组头部。
  
• 自定义不同的item类型：简单配置、无需重写额外方法。
  
• 设置空布局：比Listview的setEmptyView还要好用。
  
• 添加拖拽、滑动删除：开启，监听即可，就是这么简单。
  
• 分组的伸缩栏：比ExpandableListView还要强大，支持两级。
  
• 自定义ViewHolder：支持自定义ViewHolder，让开发者随心所欲。
  

优化Adapter代码

使用代码

public class QuickAdapter extends BaseQuickAdapter<Status, BaseViewHolder> {
    public QuickAdapter() {
        super(R.layout.tweet, DataServer.getSampleData());
    }

    @Override
  protected void convert(BaseViewHolder viewHolder, Status item) {
        viewHolder.setText(R.id.tweetName, item.getUserName())
                .setVisible(R.id.tweetRT, item.isRetweet())
                .linkify(R.id.tweetText);
                 Glide.with(mContext).load(item.getUserAvatar()).crossFade().into((ImageView) helper.getView(R.id.iv));
    }
}

使用步骤

• 继承BaseQuickAdapter基类， 泛型为List的数据类型
  
• 重写convert方法，通过viewHolder.**点出各种常用方法，如果有自定义控件或者viewHolder没有提供的方法，就可以通过getView方法来实现获取控件，然后进行的操作。
  
• 如果需要获取当前position可以通过viewHolder.getLayoutPosition()来获取
  

Item的点击事件

1. adapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
2. @Override
3. public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
4. Toast.makeText(ItemClickActivity.this, "onItemClick" + position, Toast.LENGTH_SHORT).show();
5. }
6. });

1. adapter.setOnItemLongClickListener(BaseQuickAdapter.OnItemLongClickListener);

1. adapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
2. @Override
3. public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
4. Toast.makeText(ItemClickActivity.this, "onItemChildClick" + position, Toast.LENGTH_SHORT).show();
5. }
6. });

1. mRecyclerView.addOnItemTouchListener(new OnItemClickListener() {
2. @Override
3. public void onSimpleItemClick(final BaseQuickAdapter adapter, final View view, final int position) {
4. Toast.makeText(ItemClickActivity.this, "onSimpleItemClick" + position, Toast.LENGTH_LONG).show();
5. }
6. });

添加列表加载动画

默认渐显效果：quickAdapter.openLoadAnimation();
渐显、缩放、从下到上，从左到右、从右到左：quickAdapter.openLoadAnimation(BaseQuickAdapter.ALPHAIN);
默认动画每个item只执行一次，如果想重复执行动画可以调用一下方法：mQuickAdapter.isFirstOnly(false);

自定义动画

                       quickAdapter.openLoadAnimation(new BaseAnimation() {
                            @Override
               public Animator[] getAnimators(View view) {
                                return new Animator[]{
                                        ObjectAnimator.ofFloat(view, "scaleY", 1, 1.1f, 1),
                                        ObjectAnimator.ofFloat(view, "scaleX", 1, 1.1f, 1)
                                };
                            }
                        });

添加头部、尾部

• 使用代码 添加头部、尾部  mQuickAdapter.addHeaderView(getView());
  
• 删除指定头部、尾部  mQuickAdapter.removeHeaderView(getView);
  
• 删除所有头部、尾部  mQuickAdapter.removeAllHeaderView();
  
• 扩展方法  setHeaderAndEmpty
  
• 设置头部、尾部不占一行（使用场景：gv的头部添加一个"+"号） setHeaderViewAsFlow
  

加载更多

• 加载更多：setOnLoadMoreListener() //滑动最后一个Item的时候回调
  
• 加载完成：mQuickAdapter.loadMoreComplete();
  
• 加载失败：mQuickAdapter.loadMoreFail();
  
• 没有更多数据：mQuickAdapter.loadMoreEnd();
  
• 打开或关闭加载：mQuickAdapter.setEnableLoadMore(boolean);
  
• 预加载：mQuickAdapter.setAutoLoadMoreSize(int);// 当列表滑动到倒数第N个Item的时候(默认是1)回调onLoadMoreRequested方法
  
• 检查是否满一屏，如果不满足关闭loadMore：mQuickAdapter.disableLoadMoreIfNotFullPage();
  
• 设置自定义加载布局：mQuickAdapter.setLoadMoreView(new LoadMoreView());

mQuickAdapter.setOnLoadMoreListener(new BaseQuickAdapter.RequestLoadMoreListener() {
            @Override public void onLoadMoreRequested() {
                mRecyclerView.postDelayed(new Runnable() {
                    @Override
           public void run() {
                        if (mCurrentCounter >= TOTAL_COUNTER) {
                            //数据全部加载完毕
                            mQuickAdapter.loadMoreEnd();
                        } else {
                            if (isErr) {
                                //成功获取更多数据
                                mQuickAdapter.addData(DataServer.getSampleData(PAGE_SIZE));
                                mCurrentCounter = mQuickAdapter.getData().size();
                                mQuickAdapter.loadMoreComplete();
                            } else {
                                //获取更多数据失败
                                isErr = true;
                                Toast.makeText(PullToRefreshUseActivity.this, R.string.network_err, Toast.LENGTH_LONG).show();
                                mQuickAdapter.loadMoreFail();
                            }
                        }
                    }
                }, delayMillis);
            }
        }, mReyclerView);

注意：如果上拉结束后，下拉刷新需要再次开启上拉监听，需要使用setNewData方法填充数据。

自定义加载布局

设置自定义加载布局：mQuickAdapter.setLoadMoreView(new LoadMoreView());

public final class CustomLoadMoreView extends LoadMoreView {

    @Override public int getLayoutId() {
        return R.layout.view_load_more;
    }

    /**
     * 如果返回true，数据全部加载完毕后会隐藏加载更多
     * 如果返回false，数据全部加载完毕后会显示getLoadEndViewId()布局
     */
  @Override public boolean isLoadEndGone() {
        return true;
    }

    @Override protected int getLoadingViewId() {
        return R.id.load_more_loading_view;
    }

    @Override protected int getLoadFailViewId() {
        return R.id.load_more_load_fail_view;
    }

    /**
     * isLoadEndGone()为true，可以返回0，为false，不能返回0
     */
  @Override protected int getLoadEndViewId() {
        return 0;
    }
}

xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dp_40">
    <LinearLayout
        android:id="@+id/load_more_loading_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="horizontal">
        <ProgressBar
            android:id="@+id/loading_progress"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            style="?android:attr/progressBarStyleSmall"
            android:layout_marginRight="@dimen/dp_4"
            android:indeterminateDrawable="@drawable/sample_footer_loading_progress"/>
        <TextView
            android:id="@+id/loading_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="@dimen/dp_4"
            android:text="@string/loading"
            android:textColor="#0dddb8"
            android:textSize="@dimen/sp_14"/>
    LinearLayout>
    <FrameLayout
        android:id="@+id/load_more_load_fail_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="gone">
        <TextView
            android:id="@+id/tv_prompt"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:textColor="#0dddb8"
            android:text="@string/load_failed"/>
    FrameLayout>
FrameLayout>

添加分组

实体类必须继承SectionEntity

public class MySection extends SectionEntity<Video> {
    private boolean isMore;
    public MySection(boolean isHeader, String header) {
        super(isHeader, header);
    }
    public MySection(Video t) {
        super(t);
    }
}

adapter构造需要传入两个布局id，第一个是item的，第二个是head的，在convert方法里面加载item数据，在convertHead方法里面加载head数据

public class SectionAdapter extends BaseSectionQuickAdapter<MySection> {
     public SectionAdapter(int layoutResId, int sectionHeadResId, List data) {
        super(layoutResId, sectionHeadResId, data);
    }
    @Override
  protected void convert(BaseViewHolder helper, MySection item) {
        helper.setImageUrl(R.id.iv, (String) item.t);
    }
    @Override
  protected void convertHead(BaseViewHolder helper,final MySection item) {
        helper.setText(R.id.header, item.header);
        helper.setOnClickListener(R.id.more, new View.OnClickListener() {
            @Override
       public void onClick(View v) {
                Toast.makeText(context,item.header+"more..",Toast.LENGTH_LONG).show();
            }
        });
    }

自定义不同的item类型

实体类必须实现MultiItemEntity，在设置数据的时候，需要给每一个数据设置itemType

public class MultipleItem implements MultiItemEntity {
    public static final int TEXT = 1;
    public static final int IMG = 2;
    private int itemType;

    public MultipleItem(int itemType) {
        this.itemType = itemType;
    }
    @Override
  public int getItemType() {
        return itemType;
    }
}

在构造里面addItemType绑定type和layout的关系

public class MultipleItemQuickAdapter extends BaseMultiItemQuickAdapter<MultipleItem, BaseViewHolder> {

    public MultipleItemQuickAdapter(List data) {
        super(data);
        addItemType(MultipleItem.TEXT, R.layout.text_view);
        addItemType(MultipleItem.IMG, R.layout.image_view);
    }

    @Override
  protected void convert(BaseViewHolder helper, MultipleItem item) {
        switch (helper.getItemViewType()) {
            case MultipleItem.TEXT:
                helper.setImageUrl(R.id.tv, item.getContent());
                break;
            case MultipleItem.IMG:
                helper.setImageUrl(R.id.iv, item.getContent());
                break;
        }
    }

}

如有多布局有两行布局的item都是一样的，这个时候item是可以被复用的，我们可以使用GridLayoutManager

  multipleItemAdapter.setSpanSizeLookup(new BaseQuickAdapter.SpanSizeLookup() {
           @Override
      public int getSpanSize(GridLayoutManager gridLayoutManager, int position) {
                return data.get(position).getSpanSize();
            }
        });

通过重写他的SapnSize来重用ImageView。 假设GridLayoutManager的spanCount是3，那么第一个、第二个、item的spanSize就是3，因为要占据一行（和权重差不多的意思）,然后第三个、第四个、第五个、item的spanSize就是1。

设置空布局

mQuickAdapter.setEmptyView(getView());

添加拖拽、滑动删除

 拖拽和滑动删除的回调方法

OnItemDragListener onItemDragListener = new OnItemDragListener() {
    @Override
  public void onItemDragStart(RecyclerView.ViewHolder viewHolder, int pos){}
    @Override
  public void onItemDragMoving(RecyclerView.ViewHolder source, int from, RecyclerView.ViewHolder target, int to) {}
    @Override
  public void onItemDragEnd(RecyclerView.ViewHolder viewHolder, int pos) {}
}

OnItemSwipeListener onItemSwipeListener = new OnItemSwipeListener() {
    @Override
  public void onItemSwipeStart(RecyclerView.ViewHolder viewHolder, int pos) {}
    @Override
  public void clearView(RecyclerView.ViewHolder viewHolder, int pos) {}
    @Override
  public void onItemSwiped(RecyclerView.ViewHolder viewHolder, int pos) {}
};

adapter需要继承BaseItemDraggableAdapter

public class ItemDragAdapter extends BaseItemDraggableAdapter<String, BaseViewHolder> {
    public ItemDragAdapter(List data) {
        super(R.layout.item_draggable_view, data);
    }

    @Override
  protected void convert(BaseViewHolder helper, String item) {
        helper.setText(R.id.tv, item);
    }
}

Activity使用代码

mAdapter = new ItemDragAdapter(mData);

ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new ItemDragAndSwipeCallback(mAdapter));
itemTouchHelper.attachToRecyclerView(mRecyclerView);

// 开启拖拽
mAdapter.enableDragItem(itemTouchHelper, R.id.textView, true);
mAdapter.setOnItemDragListener(onItemDragListener);

// 开启滑动删除
mAdapter.enableSwipeItem();
mAdapter.setOnItemSwipeListener(onItemSwipeListener);

默认不支持多个不同的 ViewType 之间进行拖拽，如果开发者有所需求，重写ItemDragAndSwipeCallback里的onMove()方法，return true即可

分组的伸缩栏

代码

// if you don't want to extent a class, you can also use the interface IExpandable. AbstractExpandableItem is just a helper class.
public class Level0Item extends AbstractExpandableItem<Level1Item> {...}
public class Level1Item extends AbstractExpandableItem<Person> {...}
public class Person {...}

adapter需要继承BaseMultiItemQuickAdapter

public class ExpandableItemAdapter extends BaseMultiItemQuickAdapter<MultiItemEntity, BaseViewHolder> { 
    public ExpandableItemAdapter(List<MultiItemEntity> data) {    
        super(data);
        addItemType(TYPE_LEVEL_0, R.layout.item_expandable_lv0);   
        addItemType(TYPE_LEVEL_1, R.layout.item_expandable_lv1);    
        addItemType(TYPE_PERSON, R.layout.item_text_view);
    }
    @Override
  protected void convert(final BaseViewHolder holder, final MultiItemEntity item) {
        switch (holder.getItemViewType()) {
        case TYPE_LEVEL_0:
            ....
      //set view content
           holder.itemView.setOnClickListener(new View.OnClickListener() {
               @Override
        public void onClick(View v) {
                   int pos = holder.getAdapterPosition();
                   if (lv0.isExpanded())  collapse(pos);
                   else expand(pos);
           }});
           break;
        case TYPE_LEVEL_1: // similar with level 0
      break;
        case TYPE_PERSON: //just set the content
      break;
    }
}

Activity使用代码

public class ExpandableUseActivity extends Activity {
    @Override
  protected  void onCreate(Bundle savedInstanceState) {
        ...
    ArrayList<MultiItemEntity> list = generateData();
        ExpandableItemAdapter adapter = new ExpandableItemAdapter(list);
        mRecyclerView.setAdapter(adapter);
    }

    private ArrayList<MultiItemEntity> generateData() {
        ArrayList<MultiItemEntity> res = new ArrayList<>();
        for (int i = 0; i < lv0Count; i++) {
            Level0Item lv0 = new Level0Item(...);
            for (int j = 0; j < lv1Count; j++) {
                Level1Item lv1 = new Level1Item(...);
                for (int k = 0; k < personCount; k++) {
                    lv1.addSubItem(new Person());
                }
                lv0.addSubItem(lv1);
            }
            res.add(lv0);
        }
        return res;
    }
}

自定义BaseViewHolder

之前的写法：public class QuickAdapter extends BaseQuickAdapter<Status>
现在的写法：public class QuickAdapter extends BaseQuickAdapter<Status, BaseViewHolder>
注意：需要单独建一个外部类继承BaseViewHolder，否则部分机型会出现ClassCastException

案例

1. public class BRVAHActivity extends Activity implements BaseQuickAdapter.RequestLoadMoreListener, SwipeRefreshLayout.OnRefreshListener {
2. private List<String> mDatas;
3. private RecyclerView mRecyclerView;
4. private PullToRefreshAdapter mAdapter;
5. private SwipeRefreshLayout mSwipeRefreshLayout;
7. private static final int TOTAL_COUNTER = 18;
8. private static final int PAGE_SIZE = 6;
9. private static final int DELAY_MILLIS = 1000;
10. private int mCurrentCounter = 0;
12. private boolean isErr;
13. private boolean mLoadMoreEndGone = false;
15. @Override
16. protected void onCreate(Bundle savedInstanceState) {
17. super.onCreate(savedInstanceState);
19. setContentView(R.layout.activity_main);
20. mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeLayout);
21. mSwipeRefreshLayout.setOnRefreshListener(this);
22. mSwipeRefreshLayout.setColorSchemeColors(Color.rgb(47, 223, 189));
24. mRecyclerView = (RecyclerView) findViewById(R.id.rv);
25. mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
27. initDate();
28. initAdapter();
30. ImageView headView = new ImageView(this);
31. headView.setImageResource(R.mipmap.ic_launcher);
32. mAdapter.addHeaderView(headView);
33. }
35. private void initDate() {
36. mDatas = new ArrayList<String>();
37. for (int i = 'A'; i < 'z'; i++) {
38. mDatas.add("" + (char) i);
39. }
40. }
42. private void initAdapter() {
43. mAdapter = new PullToRefreshAdapter();
44. mAdapter.setOnLoadMoreListener(this, mRecyclerView);
45. mAdapter.openLoadAnimation(BaseQuickAdapter.SLIDEIN_RIGHT);//动画
46. mAdapter.setPreLoadNumber(3);//预加载
47. mRecyclerView.setAdapter(mAdapter);
48. mCurrentCounter = mAdapter.getData().size();
50. //item点击事件
51. mAdapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
52. @Override
53. public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
54. Toast.makeText(BRVAHActivity.this, "onItemClick" + position, Toast.LENGTH_SHORT).show();
55. }
56. });
57. //item中View的点击事件
58. mAdapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
59. @Override
60. public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
61. Toast.makeText(BRVAHActivity.this, "onItemChildClick" + position, Toast.LENGTH_SHORT).show();
62. }
63. });
64. }
66. @Override
67. public void onLoadMoreRequested() {
68. mSwipeRefreshLayout.setEnabled(false);
69. if (mAdapter.getData().size() < PAGE_SIZE) {
70. mAdapter.loadMoreEnd(true);
71. } else {
72. if (mCurrentCounter >= TOTAL_COUNTER) {
73. //pullToRefreshAdapter.loadMoreEnd();//default visible
74. mAdapter.loadMoreEnd(mLoadMoreEndGone);//true is gone,false is visible
75. } else {
76. if (isErr) {
77. mAdapter.addData("新数据");
78. mCurrentCounter = mAdapter.getData().size();
79. mAdapter.loadMoreComplete();
80. } else {
81. isErr = true;
82. Toast.makeText(BRVAHActivity.this, "错误", Toast.LENGTH_LONG).show();
83. mAdapter.loadMoreFail();
84. }
85. }
86. mSwipeRefreshLayout.setEnabled(true);
87. }
88. }
90. @Override
91. public void onRefresh() {
92. mAdapter.setEnableLoadMore(false);//禁止加载
93. new Handler().postDelayed(new Runnable() {
94. @Override
95. public void run() {
96. mAdapter.setNewData(mDatas);
97. isErr = false;
98. mCurrentCounter = PAGE_SIZE;
99. mSwipeRefreshLayout.setRefreshing(false);
100. mAdapter.setEnableLoadMore(true);//启用加载
101. }
102. }, DELAY_MILLIS);
103. }
105. class PullToRefreshAdapter extends BaseQuickAdapter<String, BaseViewHolder> {
106. public PullToRefreshAdapter() {
107. super(R.layout.item2, mDatas);
108. }
110. @Override
111. protected void convert(BaseViewHolder helper, String item) {
112. helper.setText(R.id.id_num, item)
113. .setImageResource(R.id.iv, R.drawable.actionbar_add_icon)
114. .addOnClickListener(R.id.iv);
115. }
116. }
117. }

2017-5-31

null

转自：http://www.cnblogs.com/baiqiantao/p/6924662.html