写一个安卓uvccamera图像放以imageView的例子

好的，下面是一个简单的安卓UVCCamera图像预览并放到ImageView的例子：

1. 在布局文件中添加ImageView

<ImageView
    android:id="@+id/imageView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

2. 在Activity中设置并启动UVCCamera

public class MainActivity extends AppCompatActivity implements TextureView.SurfaceTextureListener {

    private static final String TAG = "MainActivity";

    private UVCCamera mUVCCamera;
    private TextureView mTextureView;
    private ImageView mImageView;

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

        mTextureView = findViewById(R.id.textureView);
        mTextureView.setSurfaceTextureListener(this);
        mImageView = findViewById(R.id.imageView);
    }

    @Override
    public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int i, int i1) {
        mUVCCamera = new UVCCamera();
        mUVCCamera.open(new UVCCamera.OnOpenListener() {
            @Override
            public void onOpen() {
                mUVCCamera.setPreviewSize(UVCCamera.DEFAULT_PREVIEW_WIDTH, UVCCamera.DEFAULT_PREVIEW_HEIGHT, UVCCamera.FRAME_FORMAT_YUYV);
                mUVCCamera.setPreviewDisplay(new Surface(surfaceTexture));
                mUVCCamera.startPreview();
            }

            @Override
            public void onError(int code) {
                Log.e(TAG, "UVCCamera open error: " + code);
            }
        });
    }

    @Override
    public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int i, int i1) {

    }

    @Override
    public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
        if (mUVCCamera != null) {
            mUVCCamera.stopPreview();
            mUVCCamera.close();
        }
        return true;
    }

    @Override
    public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
        // 获取TextureView的Bitmap
        Bitmap bitmap = mTextureView.getBitmap();
        // 设置ImageView的Bitmap
        mImageView.setImageBitmap(bitmap);
    }
}

在上面的代码中，我们首先实现了TextureView.SurfaceTextureListener接口来监听TextureView的SurfaceTexture，然后在onSurfaceTextureAvailable()方法中打开UVCCamera并设置预览尺寸和预览显示，最后在onSurfaceTextureUpdated()方法中获取TextureView的Bitmap并设置到ImageView中显示。

注：这里使用了一个第三方库UVCCamera，需要在build.gradle文件中添加依赖：

implementation 'com.serenegiant:usb:2.0.3'
implementation 'com.serenegiant:uvccamera:2.8.7'