问题描述

我有一个活动，我可以在这个活动的框架布局上显示一些片段.我想将由片段组成的 viewpager 放在片段而不是 FragmentActivity 中.如何做到这一点?

I've an activity and I can show some fragments on framelayout on this activity. I would like to put a viewpager made up of fragments inside a fragment instead of a FragmentActivity. How can this be done?

推荐答案

让一个ViewPager在一个片段中，让片段成为那个ViewPager中的页面，您需要使用嵌套片段.如果您的 minSdkVersion 为 17 或更高，则片段的本机实现支持嵌套片段.否则，您将需要使用片段的 support-v13(或 support-v4)反向移植.

To have a ViewPager be in a fragment, and to have fragments be the pages in that ViewPager, you need to use nested fragments. If your minSdkVersion is 17 or higher, the native implementation of fragments supports nested fragments. Otherwise, you will need to use the support-v13 (or support-v4) backport of fragments.

然后，您只需将 getChildFragmentManager() 提供给您的 FragmentPagerAdapter 或 FragmentStatePagerAdapter:

Then, you just need to give getChildFragmentManager() to your FragmentPagerAdapter or FragmentStatePagerAdapter:

/***
  Copyright (c) 2012 CommonsWare, LLC
  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.

  From _The Busy Coder's Guide to Android Development_
    http://commonsware.com/Android
 */

package com.commonsware.android.pagernested;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class PagerFragment extends Fragment {
  @Override
  public View onCreateView(LayoutInflater inflater,
                           ViewGroup container,
                           Bundle savedInstanceState) {
    View result=inflater.inflate(R.layout.pager, container, false);
    ViewPager pager=(ViewPager)result.findViewById(R.id.pager);

    pager.setAdapter(buildAdapter());

    return(result);
  }

  private PagerAdapter buildAdapter() {
    return(new SampleAdapter(getActivity(), getChildFragmentManager()));
  }
}

(来自这个示例项目)

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