ActivityHostFragment.java

/*
 * Copyright (C) 2011 Ievgenii Nazaruk
 *
 * 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.inazaruk.example;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.view.Window;

/**
 * This is a fragment that will be used during transition from activities to fragments.
 */
public abstract class ActivityHostFragment extends LocalActivityManagerFragment {

  protected abstract Class<? extends Activity> getActivityClass();

  private final static String ACTIVITY_TAG = "hosted";

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    final Class<? extends Activity> activityClass = getActivityClass();
    if (activityClass == null)
      return super.onCreateView(inflater, container, savedInstanceState);

    final Intent intent = new Intent(getActivity(), getActivityClass());

    @SuppressWarnings("deprecation")
    final Window w = getLocalActivityManager().startActivity(ACTIVITY_TAG, intent);
    final View wd = w != null ? w.getDecorView() : null;

    if (wd != null) {
      ViewParent parent = wd.getParent();
      if(parent != null) {
        ViewGroup v = (ViewGroup)parent;
        v.removeView(wd);
      }

      wd.setVisibility(View.VISIBLE);
      wd.setFocusableInTouchMode(true);
      if(wd instanceof ViewGroup) {
        ((ViewGroup) wd).setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
      }
    }
    return wd;
  }
}