surfaceview播放视频 竖屏activity中启动另一个横屏activity实现代码

在竖屏的Activity中启动横屏的Activity，可以在Intent中设置横屏的Activity的屏幕方向为横屏，然后在横屏的Activity中使用SurfaceView播放视频。

以下是示例代码：

竖屏的Activity：

public class VerticalActivity extends AppCompatActivity {
    private static final String TAG = "VerticalActivity";
    
    // 启动横屏的Activity
    private void startHorizontalActivity() {
        Intent intent = new Intent(this, HorizontalActivity.class);
        intent.putExtra("SCREEN_ORIENTATION", ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        startActivity(intent);
    }
    
    // 在竖屏状态下按下按钮，启动横屏的Activity
    public void onClickButton(View view) {
        startHorizontalActivity();
    }
}

横屏的Activity：

public class HorizontalActivity extends AppCompatActivity {
    private static final String TAG = "HorizontalActivity";
    private SurfaceView mSurfaceView;
    private MediaPlayer mMediaPlayer;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 获取Intent中的屏幕方向参数
        int orientation = getIntent().getIntExtra("SCREEN_ORIENTATION", ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        setRequestedOrientation(orientation); // 设置屏幕方向
        setContentView(R.layout.activity_horizontal);
        
        mSurfaceView = findViewById(R.id.surface_view);
        mMediaPlayer = new MediaPlayer();
        mMediaPlayer.setSurface(mSurfaceView.getHolder().getSurface()); // 设置MediaPlayer的Surface
        mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mediaPlayer) {
                mediaPlayer.start(); // 准备完成后开始播放
            }
        });
        
        try {
            mMediaPlayer.setDataSource("video.mp4"); // 设置视频文件路径
            mMediaPlayer.prepareAsync(); // 异步准备MediaPlayer
        } catch (IOException e) {
            Log.e(TAG, "Failed to set data source", e);
        }
    }
    
    @Override
    protected void onDestroy() {
        super.onDestroy();
        mMediaPlayer.release(); // 释放MediaPlayer资源
    }
}

其中，`activity_horizontal.xml`文件中添加了一个`SurfaceView`：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <SurfaceView
        android:id="@+id/surface_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</FrameLayout>