android – 在旋转具有单独方向布局的设备的同时继续播放YouTube播放器

当方向从纵向更改为横向时,系统应使用不同的布局文件.此布局还包括YouTube播放器作为不占用整个屏幕的视图.您将在下面找到重现问题的最低限度代码(对于全新的Android应用,最低API级别为19).

package com.example.youtubefragmenttest;

import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

import com.google.android.youtube.player.YouTubeInitializationResult;
import com.google.android.youtube.player.YouTubePlayer;
import com.google.android.youtube.player.YouTubePlayerFragment;

public class MainActivity extends AppCompatActivity implements YouTubePlayer.OnInitializedListener {

    private static final String YOUTUBE_DEV_KEY = "[your youtube dev key here]";

    private static final String TAG_YOUTUBE_FRAGMENT = "YoutubePlayerFragment";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        FragmentManager fm = getFragmentManager();
        YouTubePlayerFragment retainedYoutubeFragment = (YouTubePlayerFragment) fm.findFragmentByTag(TAG_YOUTUBE_FRAGMENT);
        if (retainedYoutubeFragment == null) {
            retainedYoutubeFragment = YouTubePlayerFragment.newInstance();
            retainedYoutubeFragment.setRetainInstance(true);
            FragmentTransaction fragmentTransaction = fm.beginTransaction();
            fragmentTransaction.add(R.id.youtube_fragment,retainedYoutubeFragment,TAG_YOUTUBE_FRAGMENT);
            fragmentTransaction.commit();
        }
        retainedYoutubeFragment.initialize(YOUTUBE_DEV_KEY,this);
    }

    @Override
    public void onInitializationSuccess(YouTubePlayer.Provider provider,YouTubePlayer youTubePlayer,boolean wasRestored) {

        if (!wasRestored) {
            youTubePlayer.cueVideo("um4TrbU2Eic");
        }
    }

    @Override
    public void onInitializationFailure(YouTubePlayer.Provider provider,YouTubeInitializationResult youTubeInitializationResult) {

    }
}

这是布局文件：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.youtubefragmenttest.MainActivity">

    <FrameLayout
        android:id="@+id/youtube_fragment"
        android:layout_width="200dp"
        android:layout_height="200dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintRight_toRightOf="parent" />

</android.support.constraint.ConstraintLayout>

我知道YouTubePlayer API的开发人员建议手动处理方向更改.这也是How to retain instance of fragment of fragment playing video after change in orientation?中接受的答案.不幸的是,这对我不起作用,因为纵向视图和横向视图的布局之间存在太多复杂的差异.

该文档暗示了一种修复此问题的方法,使得回调方法onInitializationSuccess中的boolean wasRestored为true,但这是实际问题：上面代码中的wasRestored始终为false.

底线：如何让YouTube播放器继续播放方向更改,同时保持每个方向的单独布局(这是与链接问题的主要区别)？