OnItemVisibilityChangedDelegate.java
/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.car.app.model;
import android.annotation.SuppressLint;
import androidx.annotation.NonNull;
import androidx.car.app.OnDoneCallback;
import androidx.car.app.annotations.CarProtocol;
/**
* A host-side delegate for sending
* {@link androidx.car.app.model.ItemList.OnItemVisibilityChangedListener} events to the car app.
*/
@CarProtocol
public interface OnItemVisibilityChangedDelegate {
/**
* Notifies that the items in the list within the specified indices have become visible.
*
* <p>The start index is inclusive, and the end index is exclusive. For example, if only the
* first item in a list is visible, the start and end indices would be 0 and 1,
* respectively. If no items are visible, the indices will be set to -1.
*
* @param startIndex the index (inclusive) of the first visible element, or -1 if no items
* are visible
* @param endIndex the index (exclusive) of the last visible element, or -1 if no items
* are visible
* @param callback the {@link OnDoneCallback} to trigger when the client finishes handling
* the event
*/
// This mirrors the AIDL class and is not supported to support an executor as an input.
@SuppressLint("ExecutorRegistration")
void sendItemVisibilityChanged(int startIndex, int endIndex, @NonNull OnDoneCallback callback);
}