SwipeRefreshLayout概述
SwipeRefrshLayout是Google官方更新的一个Widget,可以实现下拉刷新的效果。该控件集成自ViewGroup在support-v4兼容包下,不过我们需要升级supportlibrary的版本到19.1以上。
用户通过手势或者点击某个按钮实现内容视图的刷新,布局里加入SwipeRefreshLayout嵌套一个子视图如ListView、 RecyclerView等,触发刷新会通过OnRefreshListener的onRefresh方法回调,我们在这里执行页面数据的刷新,每次手势 的完成都会执行一次通知,根据滑动距离判断是否需要回调。setRefreshing(false)通过代码直接取消刷新,true则手动设置刷新调出刷 新视图。setEnabled(false)通过boolean控制是否禁用手势刷新 。
基本使用的方法如下:
1.setOnRefreshListener(OnRefreshListener):添加下拉刷新监听器
2.setRefreshing(boolean):显示或者隐藏刷新进度条
3.isRefreshing():检查是否处于刷新状态
使用非常简单,用一个简单案例来介绍SwipeRefreshLayout下拉刷新的功能。
布局文件
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/v7_refresh"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/back">
<android.support.v7.widget.RecyclerView
android:id="@+id/v7_recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.SwipeRefreshLayout>
item.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/cardview"
app:cardCornerRadius="5dp"
app:cardBackgroundColor="@android:color/white"
android:layout_margin="5dp"
android:layout_height="60dp"
android:layout_width="match_parent">
<TextView
android:id="@+id/menuitem_tv"
android:layout_gravity="center"
android:text="@string/app_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.v7.widget.CardView>
Activity
public class MainActivity extends AppCompatActivity {
private SwipeRefreshLayout swipeRefreshLayout;
private RecyclerView recyclerView;
private List<String> list=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
initView();
}
private void initView()
{
swipeRefreshLayout=(SwipeRefreshLayout)findViewById(R.id.v7_refresh);
recyclerView=(RecyclerView)findViewById(R.id.v7_recyclerView);
//设置下拉圆圈的大小,两个值 LARGE, DEFAULT
swipeRefreshLayout.setSize(SwipeRefreshLayout.LARGE);
// 设定下拉圆圈的背景:默认white
// swipeRefreshLayout.setProgressBackgroundColor(android.R.color.white);
initData();
}
private void initData()
{
bindData();
//设置刷新时动画的颜色,可以设置4个
swipeRefreshLayout.setColorSchemeResources(android.R.color.holo_blue_light, android.R.color.holo_red_light, android.R.color.holo_orange_light, android.R.color.holo_green_light);
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
Toast.makeText (MainActivity.this,"正在刷新",Toast.LENGTH_LONG).show();
// TODO Auto-generated method stub
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Toast.makeText (MainActivity.this,"刷新完成",Toast.LENGTH_LONG).show();
swipeRefreshLayout.setRefreshing(false);
}
}, 4000);
}
});
}
private void bindData(){
list=new ArrayList<>();
for(int i=0;i<22;i++){
list.add("Item"+(i+1));
}
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setHasFixedSize(true);
recyclerView.setItemAnimator(new DefaultItemAnimator());
MenuAdapter menuAdapter=new MenuAdapter(this,R.layout.item,list);
recyclerView.setAdapter(menuAdapter);
menuAdapter.setOnItemClickListener(new CommonRecyclerAdapter.OnItemClickListener() {
@Override
public void onItemClick(RecyclerView.ViewHolder viewHolder, View view, int position) {
Toast.makeText (MainActivity.this, list.get(position),Toast.LENGTH_LONG).show();
}
});
}
}
运行效果如图:
源码点击下载:SwipeRefreshLayout_jb51.rar
您可能感兴趣的文章:Android 使用SwipeRefreshLayout控件仿抖音做的视频下拉刷新效果Android SwipeRefreshLayout仿抖音app静态刷新android使用SwipeRefreshLayout实现ListView下拉刷新上拉加载Android SwipereFreshLayout下拉刷新android组件SwipeRefreshLayout下拉小球式刷新效果Android实现SwipeRefreshLayout首次进入自动刷新Android SwipeRefreshLayout下拉刷新源码解析Android下拉刷新SwipeRefreshLayout控件使用方法Android官方下拉刷新控件SwipeRefreshLayout使用详解Android自定义SwipeRefreshLayout高仿微信朋友圈下拉刷新Android下拉刷新控件SwipeRefreshLayout源码解析SwipeRefreshLayout+RecyclerView实现上拉刷新和下拉刷新功能