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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 
     15 package com.android.systemui.statusbar.policy;
     16 
     17 import android.content.res.Configuration;
     18 
     19 import com.android.systemui.statusbar.policy.ConfigurationController.ConfigurationListener;
     20 
     21 /**
     22  * Common listener for configuration or subsets of configuration changes (like density or
     23  * font scaling), providing easy static dependence on these events.
     24  */
     25 public interface ConfigurationController extends CallbackController<ConfigurationListener> {
     26 
     27     interface ConfigurationListener {
     28         default void onConfigChanged(Configuration newConfig) {}
     29         default void onDensityOrFontScaleChanged() {}
     30     }
     31 }
     32