我正在尝试将包含YouTube播放器的视图添加到我在旋转设备时继续播放的活动.由于UI不仅包含视频,因此我使用的是YouTubePlayerFragment.
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)？
