content: package com.android.launcher3.util;
  
  /**
   * Copyright (C) 2015 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.
   */
  
  import android.content.BroadcastReceiver;
  import android.content.Context;
  import android.content.Intent;
  import android.content.IntentFilter;
  import android.content.res.Configuration;
  import android.util.Log;
  
  /**
   * {@link BroadcastReceiver} which watches configuration changes and
   * restarts the process in case changes which affect the device profile occur.
   */
  public class ConfigMonitor extends BroadcastReceiver {
  
      private final Context mContext;
      private final float mFontScale;
      private final int mDensity;
  
      public ConfigMonitor(Context context) {
          mContext = context;
  
          Configuration config = context.getResources().getConfiguration();
          mFontScale = config.fontScale;
          mDensity = config.densityDpi;
      }
  
      @Override
      public void onReceive(Context context, Intent intent) {
          Configuration config = context.getResources().getConfiguration();
          if (mFontScale != config.fontScale || mDensity != config.densityDpi) {
              Log.d("ConfigMonitor", "Configuration changed, restarting launcher");
              mContext.unregisterReceiver(this);
              android.os.Process.killProcess(android.os.Process.myPid());
          }
      }
  
      public void register() {
          mContext.registerReceiver(this, new IntentFilter(Intent.ACTION_CONFIGURATION_CHANGED));
      }
  }
  