textureview 全屏

要将 TextureView 全屏，可以按照以下步骤进行操作：

1. 将 TextureView 添加到布局文件中，并设置其宽高。

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

    <TextureView
        android:id="@+id/texture_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</FrameLayout>

2. 在 Activity 的 onCreate 方法中获取 TextureView，并设置其监听器。

private TextureView textureView;

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

    textureView = findViewById(R.id.texture_view);

    textureView.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
        @Override
        public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
            // TextureView 可用时，将其设置为全屏
            textureView.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
        }

        @Override
        public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height) {
            // TextureView 大小变化时，重新设置布局参数
            textureView.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
        }

        @Override
        public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
            return true;
        }

        @Override
        public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
        }
    });
}

在 TextureView 的监听器中，通过设置布局参数，将 TextureView 设置为全屏。当 TextureView 的大小发生变化时，也需要重新设置布局参数。