| /* |
| * Copyright 2017 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.work.impl.constraints; |
| |
| import androidx.annotation.MainThread; |
| import androidx.annotation.Nullable; |
| |
| /** |
| * The listener for constraint changes. |
| * |
| * @param <T> the constraint data type for this listener |
| */ |
| |
| public interface ConstraintListener<T> { |
| |
| /** |
| * Called when the value of a constraint has changed. |
| * @param newValue the new value of the constraint |
| */ |
| @MainThread |
| void onConstraintChanged(@Nullable T newValue); |
| } |
