画像中的 YoutubePlayerFragment Activty

以下代码实现了一个简单的 YoutubePlayerFragment。活动的布局在纵向模式下被锁定，当方向改变或用户在 YoutubePlayer 上点击全屏时，它会转到 lansscape，YoutubePlayer 会填满屏幕。YoutubePlayerFragment 不需要扩展 Youtube 库提供的活动。它需要实现 YouTubePlayer.OnInitializedListener 才能初始化 YoutubePlayer。所以我们的 Activity 类如下

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;

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 {
   
    public static final String API_KEY ;
    public static final String VIDEO_ID = "B08iLAtS3AQ";

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

        YouTubePlayerFragment youTubePlayerFragment = (YouTubePlayerFragment) getFragmentManager()
                .findFragmentById(R.id.youtubeplayerfragment);

        youTubePlayerFragment.initialize(API_KEY, this);

    }

    /**
     *
     * @param provider The provider which was used to initialize the YouTubePlayer
     * @param youTubePlayer A YouTubePlayer which can be used to control video playback in the provider.
     * @param wasRestored Whether the player was restored from a previously saved state, as part of the YouTubePlayerView
     *                    or YouTubePlayerFragment restoring its state. true usually means playback is resuming from where
     *                    the user expects it would, and that a new video should not be loaded
     */
    @Override
    public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer, boolean wasRestored) {
                 
youTubePlayer.setFullscreenControlFlags(YouTubePlayer.FULLSCREEN_FLAG_CONTROL_ORIENTATION |
                    YouTubePlayer.FULLSCREEN_FLAG_ALWAYS_FULLSCREEN_IN_LANDSCAPE);

        if(!wasRestored) {
            youTubePlayer.cueVideo(VIDEO_ID);
        }
    }

    /**
     *
     * @param provider The provider which failed to initialize a YouTubePlayer.
     * @param error The reason for this failure, along with potential resolutions to this failure.
     */
    @Override
    public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult error) {
        
        final int REQUEST_CODE = 1;

        if(error.isUserRecoverableError()) {
            error.getErrorDialog(this,REQUEST_CODE).show();
        } else {
            String errorMessage = String.format("There was an error initializing the YoutubePlayer (%1$s)", error.toString());
            Toast.makeText(this, errorMessage, Toast.LENGTH_LONG).show();
        }
    }
}

可以将 YoutubePlayerFragment 添加到活动的布局 xaml 中，如下所示

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:tools="http://schemas.android.com/tools"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical"
              android:paddingBottom="@dimen/activity_vertical_margin"
              android:paddingLeft="@dimen/activity_horizontal_margin"
              android:paddingRight="@dimen/activity_horizontal_margin"
              android:paddingTop="@dimen/activity_vertical_margin"
              tools:context=".MainActivity">

    <fragment
        android:id="@+id/youtubeplayerfragment"
        android:name="com.google.android.youtube.player.YouTubePlayerFragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"

                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>

        </LinearLayout>
    </ScrollView>

</LinearLayout>

最后，你需要在活动标记内的 Manifest 文件中添加以下属性

android:configChanges="keyboardHidden|orientation|screenSize"
android:screenOrientation="portrait"