browser/browser/src/main/java/androidx/browser/trusted/TrustedWebActivityCallback.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.browser.trusted;

import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

/**
 * A callback class for browser to get messages from client app. The callbacks should be called via
 * {@link TrustedWebActivityCallbackRemote} on client app.
 */
public abstract class TrustedWebActivityCallback {
    /**
     * Free-form callback that may be provided by the implementation.
     *
     * <p>
     * <strong>Note:</strong>Clients should <strong>never</strong> rely on this callback to be
     * called and/or to have a defined behavior, as it is entirely implementation-defined and not
     * supported.
     *
     * <p> This can be used by implementations to add extra callbacks, for testing or experimental
     * purposes.
     *
     * @param callbackName Name of the extra callback.
     * @param args         Arguments for the callback
     */
    public abstract void onExtraCallback(@NonNull String callbackName, @Nullable Bundle args);
}