PullToRefresh
开源地址：https://github.com/open-android/PullToRefresh
PS：如果觉得文章太长，你也可观看该课程的视频，亲，里面还有高清，无码的福利喔
运行效果
- 爱生活,爱学习,更爱做代码的搬运工,分类查找更方便请下载黑马助手app
使用步骤
1. 添加依赖
//在项目下的build.gradle
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
//在app模块下的build.gradle
dependencies {
compile 'com.github.open-android:PullToRefresh:v1.0'
}
2. 在布局中添加PullToRefreshListView
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.itheima.pulltorefreshlib.PullToRefreshListView
android:id="@+id/pull_to_refresh_list_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</RelativeLayout>
3. 设置Adapter
private ArrayAdapter mArrayAdapter;
private PullToRefreshListView mPullToRefreshListView;
mPullToRefreshListView = (PullToRefreshListView) findViewById(R.id.pull_to_refresh_list_view);
mArrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, mockList(0, 30));
mPullToRefreshListView.setAdapter(mArrayAdapter);
4. 添加模拟数据
private ArrayList<String> mItems = new ArrayList<String>();
/**
* 创建或动态添加测试用的数据列表
* @param start 数据的起始位置
* @param count 数据的个数
* @return 当前的数据列表
*/
private List<String> mockList(int start, int count) {
for (int i = start; i < start + count; i++) {
mItems.add("黑马程序员:" + i);
}
return mItems;
}
5. 设置模式
//设置模式BOTH: 既能上拉也能下拉，
mPullToRefreshListView.setMode(PullToRefreshBase.Mode.BOTH);
6. 设置监听
//设置刷新监听
mPullToRefreshListView.setOnRefreshListener(mListViewOnRefreshListener2);
private PullToRefreshBase.OnRefreshListener2<ListView> mListViewOnRefreshListener2 = new PullToRefreshBase.OnRefreshListener2<ListView>() {
/**
* 下拉刷新回调
* @param refreshView
*/
@Override
public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
//模拟延时三秒刷新
mPullToRefreshListView.postDelayed(new Runnable() {
@Override
public void run() {
mItems.clear();
mockList(0, 20);
mArrayAdapter.notifyDataSetChanged();
mPullToRefreshListView.onRefreshComplete();//下拉刷新结束，下拉刷新头复位
}
}, 3000);
}
/**
* 上拉加载更多回调
* @param refreshView
*/
@Override
public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
//模拟延时三秒加载更多数据
mPullToRefreshListView.postDelayed(new Runnable() {
@Override
public void run() {
mockList(mItems.size(), 20);
mArrayAdapter.notifyDataSetChanged();
mPullToRefreshListView.onRefreshComplete();//上拉加载更多结束，上拉加载头复位
}
}, 3000);
}
};
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详细的使用方法在DEMO里面都演示啦,如果你觉得这个库还不错,请赏我一颗star吧~~~
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