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ObservableArrayMapAdapter: Remove

Browse Source 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Samuel Holland 2017-08-17 02:44:18 -05:00
parent 25412e0537
commit 44561a9cb6
2 changed files with 0 additions and 120 deletions
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28
app/src/main/java/com/wireguard/android/BindingAdapters.java
View File

@ -14,34 +14,6 @@ import android.widget.TextView;
@SuppressWarnings("unused")
public final class BindingAdapters {
@BindingAdapter({"items", "layout"})
public static <K, V> void arrayMapBinding(final ListView view,
final ObservableArrayMap<K, V> oldMap,
final int oldLayoutId,
final ObservableArrayMap<K, V> newMap,
final int newLayoutId) {
// Remove any existing binding when there is no new map.
if (newMap == null) {
view.setAdapter(null);
return;
}
// The ListAdapter interface is not generic, so this cannot be checked.
@SuppressWarnings("unchecked")
ObservableArrayMapAdapter<K, V> adapter =
(ObservableArrayMapAdapter<K, V>) view.getAdapter();
// If the layout changes, any existing adapter must be replaced.
if (newLayoutId != oldLayoutId)
adapter = null;
// Add a new binding if there was none, or if it must be replaced due to a layout change.
if (adapter == null) {
adapter = new ObservableArrayMapAdapter<>(view.getContext(), newLayoutId, newMap);
view.setAdapter(adapter);
} else if (newMap != oldMap) {
// Changing the list only requires modifying the existing adapter.
adapter.setMap(newMap);
}
}
@BindingAdapter({"items", "layout"})
public static <T> void listBinding(final ListView view,
final ObservableList<T> oldList, final int oldLayoutId,

92
app/src/main/java/com/wireguard/android/ObservableArrayMapAdapter.java
View File

@ -1,92 +0,0 @@
package com.wireguard.android;
import android.content.Context;
import android.databinding.DataBindingUtil;
import android.databinding.ObservableArrayMap;
import android.databinding.ObservableMap;
import android.databinding.ViewDataBinding;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListAdapter;
import java.lang.ref.WeakReference;
/**
* A generic ListAdapter backed by an ObservableArrayMap.
*/
class ObservableArrayMapAdapter<K, V> extends BaseAdapter implements ListAdapter {
private final int layoutId;
private final LayoutInflater layoutInflater;
private ObservableArrayMap<K, V> map;
private final OnMapChangedCallback<K, V> callback = new OnMapChangedCallback<>(this);
ObservableArrayMapAdapter(final Context context, final int layoutId,
final ObservableArrayMap<K, V> map) {
super();
layoutInflater = LayoutInflater.from(context);
this.layoutId = layoutId;
setMap(map);
}
@Override
public int getCount() {
return map != null ? map.size() : 0;
}
@Override
public V getItem(final int position) {
return map != null ? map.valueAt(position) : null;
}
@Override
public long getItemId(final int position) {
return getItem(position) != null ? getItem(position).hashCode() : -1;
}
@Override
public View getView(final int position, final View convertView, final ViewGroup parent) {
ViewDataBinding binding = DataBindingUtil.getBinding(convertView);
if (binding == null)
binding = DataBindingUtil.inflate(layoutInflater, layoutId, parent, false);
binding.setVariable(BR.item, getItem(position));
binding.executePendingBindings();
return binding.getRoot();
}
@Override
public boolean hasStableIds() {
return true;
}
public void setMap(final ObservableArrayMap<K, V> newMap) {
if (map != null)
map.removeOnMapChangedCallback(callback);
map = newMap;
if (map != null) {
map.addOnMapChangedCallback(callback);
}
}
private static class OnMapChangedCallback<K, V>
extends ObservableMap.OnMapChangedCallback<ObservableMap<K, V>, K, V> {
private final WeakReference<ObservableArrayMapAdapter<K, V>> weakAdapter;
private OnMapChangedCallback(final ObservableArrayMapAdapter<K, V> adapter) {
super();
weakAdapter = new WeakReference<>(adapter);
}
@Override
public void onMapChanged(final ObservableMap<K, V> sender, final K key) {
final ObservableArrayMapAdapter<K, V> adapter = weakAdapter.get();
if (adapter != null)
adapter.notifyDataSetChanged();
else
sender.removeOnMapChangedCallback(this);
}
}
}