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/*
* Copyright (C) 2021 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 android.view.translation;
import android.annotation.NonNull;
import android.icu.util.ULocale;
import java.util.concurrent.Executor;
/**
* Callback for listening to UI Translation state changes. See {@link
* UiTranslationManager#registerUiTranslationStateCallback(Executor, UiTranslationStateCallback)}.
*/
public interface UiTranslationStateCallback {
/**
* @removed use {@link #onStarted(ULocale, ULocale)} instead.
*/
@Deprecated
default void onStarted(@NonNull String sourceLocale, @NonNull String targetLocale) {
// no-op
}
/**
* The system is requesting translation of the UI from {@code sourceLocale} to {@code
* targetLocale}.
* <p>
* This is also called if either the requested {@code sourceLocale} or {@code targetLocale} has
* changed.
*/
default void onStarted(@NonNull ULocale sourceLocale, @NonNull ULocale targetLocale) {
onStarted(sourceLocale.getLanguage(), targetLocale.getLanguage());
}
/**
* The system is requesting that the application temporarily show the UI contents in their
* original language.
*/
void onPaused();
/**
* The system is requesting that the application restore from the temporarily paused state and
* show the content in translated language.
*/
// TODO: Remove the default implementation when clients have implemented this.
default void onResumed(@NonNull ULocale sourceLocale, @NonNull ULocale targetLocale) {
}
/**
* The UI Translation session has ended.
*/
void onFinished();
}
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