Android-PullToRefresh is a library that provides a simple way to implement the "pull-to-refresh" UI pattern in Android applications. It allows users to pull down on a list or scrollable view to trigger a refresh action, commonly used for updating content in mobile apps.

Pros

• Easy integration with existing Android projects
• Customizable appearance and behavior
• Supports both ListView and ScrollView
• Lightweight and efficient implementation

Cons

• Not actively maintained (last update was in 2014)
• Limited compatibility with newer Android versions and material design
• Lacks support for RecyclerView, which is now the preferred choice over ListView
• May require additional work to integrate with modern Android architecture components

Code Examples

1. Basic implementation with a ListView:

PullToRefreshListView pullToRefreshView = (PullToRefreshListView) findViewById(R.id.pull_to_refresh_listview);
pullToRefreshView.setOnRefreshListener(new OnRefreshListener() {
    @Override
    public void onRefresh() {
        // Your code to refresh the list contents
        // Make sure you call listView.onRefreshComplete() when done
        pullToRefreshView.onRefreshComplete();
    }
});

2. Customizing the pull label:

PullToRefreshListView pullToRefreshView = (PullToRefreshListView) findViewById(R.id.pull_to_refresh_listview);
pullToRefreshView.getLoadingLayoutProxy().setPullLabel("Pull to refresh...");
pullToRefreshView.getLoadingLayoutProxy().setReleaseLabel("Release to refresh...");
pullToRefreshView.getLoadingLayoutProxy().setRefreshingLabel("Loading...");

3. Using with a ScrollView:

PullToRefreshScrollView pullToRefreshView = (PullToRefreshScrollView) findViewById(R.id.pull_to_refresh_scrollview);
pullToRefreshView.setOnRefreshListener(new OnRefreshListener<ScrollView>() {
    @Override
    public void onRefresh(PullToRefreshBase<ScrollView> refreshView) {
        // Your code to refresh the content
        pullToRefreshView.onRefreshComplete();
    }
});

Getting Started

1. Add the library to your project's build.gradle file:

dependencies {
    implementation 'com.github.johannilsson:android-pulltorefresh:0.6'
}

2. Add the PullToRefreshListView or PullToRefreshScrollView to your layout XML:

<com.handmark.pulltorefresh.library.PullToRefreshListView
    android:id="@+id/pull_to_refresh_listview"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

3. Initialize and use the PullToRefreshListView in your Activity or Fragment:

PullToRefreshListView pullToRefreshView = (PullToRefreshListView) findViewById(R.id.pull_to_refresh_listview);
pullToRefreshView.setOnRefreshListener(new OnRefreshListener() {
    @Override
    public void onRefresh() {
        // Your refresh logic here
        pullToRefreshView.onRefreshComplete();
    }
});