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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
      5  * use this file except in compliance with the License. You may obtain a copy of
      6  * the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
     12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
     13  * License for the specific language governing permissions and limitations under
     14  * the License.
     15  */
     16 package android.app.cts;
     17 
     18 import android.app.Activity;
     19 import android.content.Context;
     20 import android.content.res.Configuration;
     21 import android.os.Bundle;
     22 import android.view.WindowManager;
     23 
     24 import java.util.concurrent.CompletableFuture;
     25 import java.util.concurrent.Future;
     26 
     27 public class ApplyOverrideConfigurationActivity extends Activity {
     28     public static final int OVERRIDE_SMALLEST_WIDTH = 99999;
     29 
     30     private CompletableFuture<Configuration> mOnConfigurationChangedFuture = null;
     31 
     32     @Override
     33     protected void onCreate(Bundle savedInstanceState) {
     34         super.onCreate(savedInstanceState);
     35 
     36         getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
     37                 | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
     38                 | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
     39     }
     40 
     41     @Override
     42     protected void attachBaseContext(Context newBase) {
     43         super.attachBaseContext(newBase);
     44 
     45         final Configuration overrideConfig = new Configuration();
     46         overrideConfig.smallestScreenWidthDp = OVERRIDE_SMALLEST_WIDTH;
     47         applyOverrideConfiguration(overrideConfig);
     48     }
     49 
     50     @Override
     51     public void onConfigurationChanged(Configuration newConfig) {
     52         super.onConfigurationChanged(newConfig);
     53 
     54         synchronized (this) {
     55             if (mOnConfigurationChangedFuture != null) {
     56                 mOnConfigurationChangedFuture.complete(new Configuration(newConfig));
     57                 mOnConfigurationChangedFuture = null;
     58             }
     59         }
     60     }
     61 
     62     /**
     63      * Hands back a Future that will be completed when onConfigurationChanged() is called.
     64      * It will only report a single call to onConfigurationChanged(). Subsequent calls can be
     65      * captured by calling this method again. Calling this method will cancel all past
     66      * Futures received from this method.
     67      * @return A Future that completes with the configuration passed in to onConfigurationChanged().
     68      */
     69     public synchronized Future<Configuration> watchForSingleOnConfigurationChangedCallback() {
     70         if (mOnConfigurationChangedFuture != null) {
     71             mOnConfigurationChangedFuture.cancel(true);
     72         }
     73 
     74         mOnConfigurationChangedFuture = new CompletableFuture<>();
     75         return mOnConfigurationChangedFuture;
     76     }
     77 }
     78