什么是SmartRefreshLayout
是一个“聪明”或者“智能”的下拉刷新布局，由于它的“智能”，它不只是支持所有的View，还支持多层嵌套的视图结构。 它继承自ViewGroup 而不是FrameLayout或LinearLayout，提高了性能。
如何使用SmartRefreshLayout
一、在build.gradle中添加依赖
// 注意：分包之后不会有默认的Header和Footer需要手动添加！还是原来的三种方法！
implementation 'com.scwang.smart:refresh-layout-kernel:2.0.0-alpha-1' //核心必须依赖
implementation 'com.scwang.smart:refresh-header-classics:2.0.0-alpha-1' //经典刷新头
implementation 'com.scwang.smart:refresh-header-radar:2.0.0-alpha-1' //雷达刷新头
implementation 'com.scwang.smart:refresh-header-falsify:2.0.0-alpha-1' //虚拟刷新头
implementation 'com.scwang.smart:refresh-header-material:2.0.0-alpha-1' //谷歌刷新头
implementation 'com.scwang.smart:refresh-header-two-level:2.0.0-alpha-1' //二级刷新头
implementation 'com.scwang.smart:refresh-footer-ball:2.0.0-alpha-1' //球脉冲加载
implementation 'com.scwang.smart:refresh-footer-classics:2.0.0-alpha-1' //经典加载
根据个人需求，自行添加
如果使用 AndroidX 在 gradle.properties 中添加
android.useAndroidX=true
android.enableJetifier=true
二、xml布局
<?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:orientation="vertical">
<com.scwang.smartrefresh.layout.SmartRefreshLayout
android:id="@+id/refresh_view"
android:background="@color/app_gray_bg"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.scwang.smartrefresh.layout.header.ClassicsHeader
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@+id/list_view"
android:scrollbars="none"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<LinearLayout
android:id="@+id/layout_blank"
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:src="@mipmap/bg_blank"
android:contentDescription="@null"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:layout_marginTop="5dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/app_text"
android:text="@string/deals_list_blank"
android:textSize="@dimen/normal_size"/>
</LinearLayout>
</RelativeLayout>
<com.scwang.smartrefresh.layout.footer.ClassicsFooter
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</com.scwang.smartrefresh.layout.SmartRefreshLayout>
</LinearLayout>
刷新控件中放了一个RelativeLayout，里面有一个ListView和空白时显示的提示。
三、Activity
public class ActAllDealsList extends Activity implements OnRefreshListener, OnLoadMoreListener {
@BindView(R.id.title_my_deals_list)
TitleBar titleMyDealsList;
@BindView(R.id.list_view)
ListView listView;
@BindView(R.id.layout_blank)
LinearLayout layoutBlank;
@BindView(R.id.refresh_view)
SmartRefreshLayout refreshView;
private PromptDialog dialog;
private DealsListAdapter adapter;
private int pageIndex = Constant.PAGE_START;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_deals_list);
ButterKnife.bind(this);
initView();
}
private void initView() {
titleMyDealsList.setBackListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
refreshView.setOnRefreshListener(this);//使用该方法时，Activity需要继承OnRefreshListener
refreshView.setOnLoadMoreListener(this);//使用该方法时，Activity需要继承OnRefreshListener
//List的相关操作
adapter = new DealsListAdapter(this);
listView.setAdapter(adapter);
listView.setDividerHeight(0);
onRefresh(refreshView);//下拉刷新控件
}
/**
* 提交查询信息
*/
private void getData() {
if (dialog == null){
dialog = new PromptDialog(this);
}
dialog.showInfo("正在加载");
refreshView.finishRefresh(true);//设置下拉完成刷新
refreshView.finishLoadMore(true);//设置上拉完成刷新
AppParams params = new AppParams(IpAddress.getUrl(IpAddress.COMPARISON_PROJECT), true);//自定义params的方法
params.setConnectTimeout(5000);
x.http().post(params, new Callback.CommonCallback<DealsListMode>() {
@Override
public void onSuccess(DealsListMode result) {
if (result != null) {
if (result.isSuccess()) {
List<DealsListMode.ListBean> list = result.getList();
adapter.initData(list, pageIndex);
if (list != null && list.size() != 0) {//分页操作
pageIndex += 1;
startDate = list.get(list.size() - 1).getRiqi() + "";
layoutBlank.setVisibility(View.GONE);
if (list.size() < Constant.PAGE_SIZE) {
refreshView.setNoMoreData(true);
} else {
refreshView.setNoMoreData(false);
}
} else if (pageIndex == Constant.PAGE_START) {
layoutBlank.setVisibility(View.VISIBLE);
}
dialog.showSuccess("加载成功");
} else {
dialog.showSuccess(result.getMsg());
}
}
}
@Override
public void onError(Throwable ex, boolean isOnCallback) {
layoutBlank.setVisibility(View.VISIBLE);
dialog.showError("获取详细失败，请稍后重试");
}
@Override
public void onCancelled(CancelledException cex) {
}
@Override
public void onFinished() {
}
});
}
/**
* 下拉重置分页相关参数
*/
@Override
public void onRefresh(RefreshLayout refreshLayout) {
refreshView.setNoMoreData(false);
pageIndex = Constant.PAGE_START;
startDate = null;
getData();
}
/**
* 上拉刷新
*/
@Override
public void onLoadMore(RefreshLayout refreshLayout) {
getData();
}
}
Activity中先设置上拉、下拉刷新，使Activity implement OnRefreshListener, OnLoadMoreListener，并重写上拉onRefresh下拉onLoadMore的方法。在方法中获取数据，设置上拉、下拉刷新完成refreshView.finishRefresh(true);、refreshView.finishLoadMore(true)，后进行数据刷新显示（从服务器获取数据，通过ListView的Adapter进行刷新）。根据实际情况对refreshView.setNoMoreData(true)进行设置。
