android--BaseQuickAdapter
框架引入build.gradle(Project:XXXX)：allprojects {repositories {...maven { url "https://jitpack.io" }}}build.gradle(Module:app)：implementation 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.31'
·
框架引入
build.gradle(Project:XXXX)：
allprojects {
repositories {
...
maven { url "https://jitpack.io" }
}
}
build.gradle(Module:app)：
implementation 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.31'
混淆
keep class com.chad.library.adapter.** {
*;
}
-keep public class * extends com.chad.library.adapter.base.BaseQuickAdapter
-keep public class * extends com.chad.library.adapter.base.BaseViewHolder
-keepclassmembers class **$** extends com.chad.library.adapter.base.BaseViewHolder {
<init>(...);
}
简单使用
public class Adapter1 extends BaseQuickAdapter<Student,BaseViewHolder>{
private Context mcontext;
public Adapter1(Context context,int layoutResId, @Nullable List<Student> data) {
super(layoutResId, data);
mcontext=context;
}
@Override
protected void convert(BaseViewHolder helper, Student item) {
helper.setText(R.id.student_name,item.getName())
.setText(R.id.student_age,item.getAge()+"")
.setText(R.id.student_address,item.getAddress());
Glide.with(mcontext).load(item.getIcon()).into((ImageView) helper.getView(R.id.student_icon));
}
}
1、使用: 首先需要继承BaseQuickAdapter,然后BaseQuickAdapter <Bean,BaseViewHolder>， 第一个泛型Bean是数据实体类型，第二个BaseViewHolder是ViewHolder其目的是为了支持扩展ViewHolder。
2、赋值：可以直接使用viewHolder对象点相关方法通过传入viewId和数据进行，方法支持链式调用。如果是加载网络图片或自定义view可以通过viewHolder.getView(viewId)获取该控件。
Item事件
adapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
@Override
public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
Toast.makeText(CommonAdapterActivity.this, "点击了item", Toast.LENGTH_SHORT).show();
}
});
adapter.setOnItemLongClickListener(new BaseQuickAdapter.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(BaseQuickAdapter adapter, View view, int position) {
Toast.makeText(CommonAdapterActivity.this, "长按了item", Toast.LENGTH_SHORT).show();
return false;
}
});
注意：嵌套recycleView的情况下需要使用你使用 adapter. setOnItemClickListener 来设置点击事件,如果使用recycleView.addOnItemTouchListener会累计添加的。
Item子控件点击事件
@Override
protected void convert(BaseViewHolder helper, Student item) {
helper.setText(R.id.student_name,item.getName())
.setText(R.id.student_age,item.getAge()+"")
.setText(R.id.student_address,item.getAddress())
.addOnClickListener(R.id.student_icon)
.addOnClickListener(R.id.student_name)
.addOnLongClickListener(R.id.student_address);
Glide.with(mcontext).load(item.getIcon()).into((ImageView) helper.getView(R.id.student_icon));
}
........................................................................................................................
adapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
@Override
public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
switch (view.getId()) {
case R.id.student_icon:
//获取其他控件，如下，获取student_name
TextView textView=(TextView) adapter.getViewByPosition(recycleview, position, R.id.student_name);
Toast.makeText(CommonAdapterActivity.this, "点击"+textView.getText().toString()+"的头像", Toast.LENGTH_SHORT).show();
break;
case R.id.student_name:
Toast.makeText(CommonAdapterActivity.this, "点击了名字", Toast.LENGTH_SHORT).show();
break;
}
}
});
adapter.setOnItemChildLongClickListener(new BaseQuickAdapter.OnItemChildLongClickListener() {
@Override
public boolean onItemChildLongClick(BaseQuickAdapter adapter, View view, int position) {
if (view.getId() == R.id.student_address)
Toast.makeText(CommonAdapterActivity.this, "长按了address", Toast.LENGTH_SHORT).show();
return false;
}
});
动画
开启动画(默认为渐显效果)
adapter.openLoadAnimation();
默认提供5种方法（渐显、缩放、从下到上，从左到右、从右到左）
public static final int ALPHAIN = 0x00000001;
public static final int SCALEIN = 0x00000002;
public static final int SLIDEIN_BOTTOM = 0x00000003;
public static final int SLIDEIN_LEFT = 0x00000004;
public static final int SLIDEIN_RIGHT = 0x00000005;
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)
};
}
});
动画默认只执行一次,如果想重复执行可设置
mQuickAdapter.isFirstOnly(false);
因为有些人不希望第一页看到动画，或者说希望前几个条目加载不需要有动画，所以可以设置不显示动画数量
adapter.setNotDoAnimationCount(count);
添加头部、尾部
mQuickAdapter.addHeaderView(getView());
mQuickAdapter.addFooterView(getView());
删除指定view
mQuickAdapter.removeHeaderView(getView);
mQuickAdapter.removeFooterView(getView);
删除所有
mQuickAdapter.removeAllHeaderView();
mQuickAdapter.removeAllFooterView();
默认出现了头部就不会显示Empty，和尾部，配置以下方法也支持同时显示：
setHeaderAndEmpty
setHeaderFooterEmpty
默认头部尾部都是占满一行，如果需要不占满可以配置：
setHeaderViewAsFlow
setFooterViewAsFlow
加载更多
此adapter封装加载更多其实并不好用，因此我更建议采用传统的根据recyclerview判断item位置进行判断，自动加载更多
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition();
firstVisibleItem=linearLayoutManager.findFirstVisibleItemPosition();
if (newState == RecyclerView.SCROLL_STATE_IDLE&&linearLayoutManager.getItemCount() >0&&lastVisibleItem + 1 == linearLayoutManager.getItemCount()) {
new Handler().postDelayed(() -> loadData(),300) ;
}
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition();
firstVisibleItem=linearLayoutManager.findFirstVisibleItemPosition();
}
});
LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
//屏幕中最后一个可见子项的position
int lastVisibleItem = layoutManager.findLastVisibleItemPosition();
//当前屏幕所看到的子项个数
layoutManager.getChildCount();
//当前RecyclerView的所有子项个数
layoutManager.getItemCount();
//RecyclerView的滑动状态
recyclerView.getScrollState();
如果想要预加载也很简单，只需要修改当前最下方item的postion和总条目之间的差值即可。
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 MyBaseQuickAdapter extends BaseQuickAdapter<Bean, BaseViewHolder> {
public MyBaseQuickAdapter(@Nullable List<Bean> data) {
super(R.layout.list_item, data);
}
@Override
protected void convert(@NonNull BaseViewHolder helper, Bean item) {
helper.setText(R.id.name, item.getName())
.setText(R.id.age, String.valueOf(item.getAge()))
.addOnClickListener(R.id.name)
.addOnClickListener(R.id.age)
.addOnLongClickListener(R.id.name)
.addOnLongClickListener(R.id.age);
}
}
Activity使用代码
mAdapter = new ItemDragAdapter(mData);
ItemDragAndSwipeCallback itemDragAndSwipeCallback = new ItemDragAndSwipeCallback(mAdapter);
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(itemDragAndSwipeCallback);
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
完整使用
public class MyBaseQuickAdapter extends BaseItemDraggableAdapter<Bean, BaseViewHolder> {
public MyBaseQuickAdapter(@Nullable List<Bean> data) {
super(R.layout.list_item, data);
}
@Override
protected void convert(@NonNull BaseViewHolder helper, Bean item) {
helper.setText(R.id.name, item.getName())
.setText(R.id.age, String.valueOf(item.getAge()))
.addOnClickListener(R.id.name)
.addOnClickListener(R.id.age)
.addOnLongClickListener(R.id.name)
.addOnLongClickListener(R.id.age);
}
}
adapter = new MyBaseQuickAdapter(data);
adapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
@Override
public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
Toast.makeText(MainActivity.this, "点击了" + position, Toast.LENGTH_SHORT).show();
}
});
adapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
@Override
public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
switch (view.getId()) {
case R.id.name:
Toast.makeText(MainActivity.this, "点击了name", Toast.LENGTH_SHORT).show();
break;
case R.id.age:
Toast.makeText(MainActivity.this, "点击了age", Toast.LENGTH_SHORT).show();
break;
}
}
});
adapter.setOnItemChildLongClickListener(new BaseQuickAdapter.OnItemChildLongClickListener() {
@Override
public boolean onItemChildLongClick(BaseQuickAdapter adapter, View view, int position) {
switch (view.getId()) {
case R.id.name:
Toast.makeText(MainActivity.this, "长按了name", Toast.LENGTH_SHORT).show();
break;
case R.id.age:
Toast.makeText(MainActivity.this, "长按了age", Toast.LENGTH_SHORT).show();
break;
}
return false;
}
});
adapter.openLoadAnimation();
adapter.openLoadAnimation(BaseQuickAdapter.ALPHAIN);
adapter.isFirstOnly(false);
adapter.setNotDoAnimationCount(5);
View headerView = View.inflate(this, R.layout.header_view, null);
View footerView = View.inflate(this, R.layout.footer_view, null);
adapter.addHeaderView(headerView);
adapter.addFooterView(footerView);
ItemDragAndSwipeCallback itemDragAndSwipeCallback = new ItemDragAndSwipeCallback(adapter);
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(itemDragAndSwipeCallback);
itemTouchHelper.attachToRecyclerView(list);
// 开启拖拽
adapter.enableDragItem(itemTouchHelper, R.id.name, true);
adapter.setOnItemDragListener(new OnItemDragListener() {
@Override
public void onItemDragStart(RecyclerView.ViewHolder viewHolder, int i) {
}
@Override
public void onItemDragMoving(RecyclerView.ViewHolder viewHolder, int i, RecyclerView.ViewHolder viewHolder1, int i1) {
}
@Override
public void onItemDragEnd(RecyclerView.ViewHolder viewHolder, int i) {
}
});
// 开启滑动删除
adapter.enableSwipeItem();
adapter.setOnItemSwipeListener(new OnItemSwipeListener() {
@Override
public void onItemSwipeStart(RecyclerView.ViewHolder viewHolder, int i) {
}
@Override
public void clearView(RecyclerView.ViewHolder viewHolder, int i) {
}
@Override
public void onItemSwiped(RecyclerView.ViewHolder viewHolder, int i) {
}
@Override
public void onItemSwipeMoving(Canvas canvas, RecyclerView.ViewHolder viewHolder, float v, float v1, boolean b) {
}
});
list.setAdapter(adapter);
分组布局
此adapter分组布局，不是类似于那种黏性头部的分组，而是把头布局作为一个item进行多布局的封装。
头布局也支持点击事件，头布局内部的控件也支持点击事件。和普通布局一般无二。
把需要加头布局的实体类用一个新的实体类包裹起来，比如作者举例的Video，用MySection 包裹了Video，这样的MySection内部有两个构造方法，一个是头布局的构造方法，一个是实体类的构造方法，举例如下
public class MySection extends SectionEntity<Video> {
private boolean isMore;
public MySection(boolean isHeader, String header, boolean isMroe) {
super(isHeader, header);
this.isMore = isMroe;
}
public MySection(Video t) {
super(t);
}
public boolean isMore() {
return isMore;
}
public void setMore(boolean mroe) {
isMore = mroe;
}
}
你可以在构造方法中加上自己需要的字段来以便给头布局赋值；上述代码加入了一个ismore字段，用来判断是否有展开更多字段。
adapter需要实现BaseSectionQuickAdapter，convertHead用来绑定头布局数据，convert用来绑定一般数据。
public class SectionAdapter extends BaseSectionQuickAdapter<MySection, BaseViewHolder> {
public SectionAdapter(int layoutResId, int sectionHeadResId, List data) {
super(layoutResId, sectionHeadResId, data);
}
@Override
protected void convertHead(BaseViewHolder helper, final MySection item) {
helper.setText(R.id.header, item.header)
.setVisible(R.id.more, item.isMore())
.addOnClickListener(R.id.more);
}
@Override
protected void convert(BaseViewHolder helper, MySection item) {
Video video = (Video) item.t;
switch (helper.getLayoutPosition() %
2) {
case 0:
helper.setImageResource(R.id.iv, R.mipmap.m_img1);
break;
case 1:
helper.setImageResource(R.id.iv, R.mipmap.m_img2);
break;
}
helper.setText(R.id.tv, video.getName());
}
}
当然数据初始化的时候要注意，同一头布局下的需要写在一起：
public static List<MySection> getSampleData() {
List<MySection> list = new ArrayList<>();
list.add(new MySection(true, "Section 1", true));
list.add(new MySection(new Video(HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK, CYM_CHAD)));
list.add(new MySection(true, "Section 2", false));
list.add(new MySection(new Video(HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK, CYM_CHAD)));
list.add(new MySection(new Video(HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK, CYM_CHAD)));
list.add(new MySection(new Video(HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK, CYM_CHAD)));
list.add(new MySection(new Video(HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK, CYM_CHAD)));
list.add(new MySection(new Video(HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK, CYM_CHAD)));
list.add(new MySection(true, "Section 3", false));
list.add(new MySection(new Video(HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK, CYM_CHAD)));
list.add(new MySection(new Video(HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK, CYM_CHAD)));
list.add(new MySection(true, "Section 4", false));
list.add(new MySection(new Video(HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK, CYM_CHAD)));
list.add(new MySection(new Video(HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK, CYM_CHAD)));
}
多布局
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;
}
}
adapter需要继承BaseMultiItemQuickAdapter，addItemType用来绑定itemType和item布局。
public class MultipleItemQuickAdapter extends BaseMultiItemQuickAdapter<MultipleItem, BaseViewHolder> {
public MultipleItemQuickAdapter(List data) {
super(data);
addItemType(1, R.layout.text_view);
addItemType(2, R.layout.image_view);
}
@Override
protected void convert(BaseViewHolder helper, MultipleItem item) {
switch (helper.getItemViewType()) {
case 1:
helper.setImageUrl(R.id.tv, item.getContent());
break;
case 2:
helper.setImageUrl(R.id.iv, item.getContent());
break;
}
}
}
设置空布局
mQuickAdapter.setEmptyView(getView());
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