StatefulAdapter.java
/*
* Copyright 2018 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.viewpager2.adapter;
import android.os.Parcelable;
import android.view.View;
import androidx.annotation.NonNull;
import androidx.viewpager2.widget.ViewPager2;
/**
* {@link ViewPager2} adapters should implement this interface to be called during
* {@link View#onSaveInstanceState()} and {@link View#onRestoreInstanceState(Parcelable)}
*/
public interface StatefulAdapter {
/** Saves adapter state */
@NonNull Parcelable saveState();
/** Restores adapter state */
void restoreState(@NonNull Parcelable savedState);
}