39 lines
1.5 KiB
Java
39 lines
1.5 KiB
Java
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package com.wireguard.android;
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import android.databinding.BindingAdapter;
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import android.databinding.ObservableList;
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import android.widget.ListView;
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/**
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* Static methods for use by generated code in the Android data binding library.
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*/
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public final class BindingAdapters {
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@BindingAdapter({"items", "layout"})
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public static <T> void listBinding(ListView view, ObservableList<T> oldList, int oldLayoutId,
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ObservableList<T> newList, int newLayoutId) {
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// Remove any existing binding when there is no new list.
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if (newList == null) {
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view.setAdapter(null);
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return;
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}
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// The ListAdapter interface is not generic, so this cannot be checked.
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@SuppressWarnings("unchecked")
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ObservableListAdapter<T> adapter = (ObservableListAdapter<T>) view.getAdapter();
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// If the layout changes, any existing adapter must be replaced.
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if (newLayoutId != oldLayoutId)
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adapter = null;
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// Add a new binding if there was none, or if it must be replaced due to a layout change.
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if (adapter == null) {
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adapter = new ObservableListAdapter<>(view.getContext(), newLayoutId, newList);
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view.setAdapter(adapter);
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} else if (newList != oldList) {
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// Changing the list only requires modifying the existing adapter.
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adapter.setList(newList);
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}
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}
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private BindingAdapters() {
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}
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}
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