ObservableArrayMapAdapter: Remove
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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25412e0537
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@ -14,34 +14,6 @@ import android.widget.TextView;
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@SuppressWarnings("unused")
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public final class BindingAdapters {
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@BindingAdapter({"items", "layout"})
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public static <K, V> void arrayMapBinding(final ListView view,
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final ObservableArrayMap<K, V> oldMap,
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final int oldLayoutId,
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final ObservableArrayMap<K, V> newMap,
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final int newLayoutId) {
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// Remove any existing binding when there is no new map.
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if (newMap == 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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ObservableArrayMapAdapter<K, V> adapter =
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(ObservableArrayMapAdapter<K, V>) 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 ObservableArrayMapAdapter<>(view.getContext(), newLayoutId, newMap);
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view.setAdapter(adapter);
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} else if (newMap != oldMap) {
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// Changing the list only requires modifying the existing adapter.
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adapter.setMap(newMap);
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}
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}
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@BindingAdapter({"items", "layout"})
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public static <T> void listBinding(final ListView view,
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final ObservableList<T> oldList, final int oldLayoutId,
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@ -1,92 +0,0 @@
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package com.wireguard.android;
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import android.content.Context;
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import android.databinding.DataBindingUtil;
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import android.databinding.ObservableArrayMap;
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import android.databinding.ObservableMap;
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import android.databinding.ViewDataBinding;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.BaseAdapter;
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import android.widget.ListAdapter;
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import java.lang.ref.WeakReference;
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/**
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* A generic ListAdapter backed by an ObservableArrayMap.
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*/
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class ObservableArrayMapAdapter<K, V> extends BaseAdapter implements ListAdapter {
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private final int layoutId;
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private final LayoutInflater layoutInflater;
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private ObservableArrayMap<K, V> map;
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private final OnMapChangedCallback<K, V> callback = new OnMapChangedCallback<>(this);
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ObservableArrayMapAdapter(final Context context, final int layoutId,
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final ObservableArrayMap<K, V> map) {
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super();
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layoutInflater = LayoutInflater.from(context);
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this.layoutId = layoutId;
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setMap(map);
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}
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@Override
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public int getCount() {
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return map != null ? map.size() : 0;
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}
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@Override
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public V getItem(final int position) {
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return map != null ? map.valueAt(position) : null;
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}
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@Override
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public long getItemId(final int position) {
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return getItem(position) != null ? getItem(position).hashCode() : -1;
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}
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@Override
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public View getView(final int position, final View convertView, final ViewGroup parent) {
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ViewDataBinding binding = DataBindingUtil.getBinding(convertView);
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if (binding == null)
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binding = DataBindingUtil.inflate(layoutInflater, layoutId, parent, false);
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binding.setVariable(BR.item, getItem(position));
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binding.executePendingBindings();
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return binding.getRoot();
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}
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@Override
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public boolean hasStableIds() {
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return true;
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}
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public void setMap(final ObservableArrayMap<K, V> newMap) {
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if (map != null)
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map.removeOnMapChangedCallback(callback);
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map = newMap;
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if (map != null) {
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map.addOnMapChangedCallback(callback);
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}
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}
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private static class OnMapChangedCallback<K, V>
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extends ObservableMap.OnMapChangedCallback<ObservableMap<K, V>, K, V> {
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private final WeakReference<ObservableArrayMapAdapter<K, V>> weakAdapter;
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private OnMapChangedCallback(final ObservableArrayMapAdapter<K, V> adapter) {
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super();
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weakAdapter = new WeakReference<>(adapter);
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}
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@Override
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public void onMapChanged(final ObservableMap<K, V> sender, final K key) {
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final ObservableArrayMapAdapter<K, V> adapter = weakAdapter.get();
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if (adapter != null)
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adapter.notifyDataSetChanged();
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else
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sender.removeOnMapChangedCallback(this);
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}
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}
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}
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