content: /*
   * Copyright (C) 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 com.android.layoutlib.bridge.android.support;
  
  import com.android.ide.common.rendering.api.LayoutLog;
  import com.android.layoutlib.bridge.Bridge;
  import com.android.layoutlib.bridge.util.ReflectionUtils.ReflectionException;
  
  import android.content.Context;
  import android.widget.TabHost;
  
  import static com.android.layoutlib.bridge.util.ReflectionUtils.getCause;
  import static com.android.layoutlib.bridge.util.ReflectionUtils.getMethod;
  import static com.android.layoutlib.bridge.util.ReflectionUtils.invoke;
  
  /**
   * Utility class for working with android.support.v4.app.FragmentTabHost
   */
  public class FragmentTabHostUtil {
  
      public static final String[] CN_FRAGMENT_TAB_HOST = {
              "android.support.v4.app.FragmentTabHost",
              "androidx.fragment.app.FragmentTabHost"
      };
  
      private static final String[] CN_FRAGMENT_MANAGER = {
              "android.support.v4.app.FragmentManager",
              "androidx.fragment.app.FragmentManager"
      };
  
      /**
       * Calls the setup method for the FragmentTabHost tabHost
       */
      public static void setup(TabHost tabHost, Context context) {
          Class<?> fragmentManager = null;
  
          for (int i = CN_FRAGMENT_MANAGER.length - 1; i >= 0; i--) {
              String className = CN_FRAGMENT_MANAGER[i];
              try {
                  fragmentManager = Class.forName(className, true,
                          tabHost.getClass().getClassLoader());
                  break;
              } catch (ClassNotFoundException ignore) {
              }
          }
  
          if (fragmentManager == null) {
              Bridge.getLog().error(LayoutLog.TAG_BROKEN,
                      "Unable to find FragmentManager.", null);
              return;
          }
  
          try {
              invoke(getMethod(tabHost.getClass(), "setup", Context.class,
                      fragmentManager, int.class), tabHost, context, null,
                      android.R.id.tabcontent);
          } catch (ReflectionException e) {
              Throwable cause = getCause(e);
              Bridge.getLog().error(LayoutLog.TAG_BROKEN,
                      "Error occurred while trying to setup FragmentTabHost.", cause, null);
          }
      }
  }
  