要设置Android Vision相机的图像大小，你可以使用以下代码示例：

1. 首先，在AndroidManifest.xml文件中添加相机权限：

2. 创建一个CameraSourcePreview类，用于显示相机预览：

import android.content.Context;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.ViewGroup;

import com.google.android.gms.common.images.Size;
import com.google.android.gms.vision.CameraSource;

import java.io.IOException;

public class CameraSourcePreview extends ViewGroup {
    private Context mContext;
    private SurfaceView mSurfaceView;
    private boolean mStartRequested;
    private boolean mSurfaceAvailable;
    private CameraSource mCameraSource;

    public CameraSourcePreview(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        mStartRequested = false;
        mSurfaceAvailable = false;

        mSurfaceView = new SurfaceView(context);
        mSurfaceView.getHolder().addCallback(new SurfaceCallback());
        addView(mSurfaceView);
    }

    public void start(CameraSource cameraSource) throws IOException {
        if (cameraSource == null) {
            stop();
        }

        mCameraSource = cameraSource;

        if (mCameraSource != null) {
            mStartRequested = true;
            startIfReady();
        }
    }

    public void stop() {
        if (mCameraSource != null) {
            mCameraSource.stop();
        }
    }

    private void startIfReady() throws IOException {
        if (mStartRequested && mSurfaceAvailable) {
            mCameraSource.start(mSurfaceView.getHolder());
            mStartRequested = false;
        }
    }

    private class SurfaceCallback implements SurfaceHolder.Callback {
        @Override
        public void surfaceCreated(SurfaceHolder surface) {
            mSurfaceAvailable = true;
            try {
                startIfReady();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder surface) {
            mSurfaceAvailable = false;
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

        }
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        int width = 320;
        int height = 240;

        if (mCameraSource != null && mCameraSource.getPreviewSize() != null) {
            Size size = mCameraSource.getPreviewSize();
            width = size.getWidth();
            height = size.getHeight();
        }

        // 根据相机预览尺寸调整SurfaceView的大小和位置
        int layoutWidth = right - left;
        int layoutHeight = bottom - top;

        int childWidth;
        int childHeight;
        int childXOffset = 0;
        int childYOffset = 0;
        float widthRatio = (float) layoutWidth / (float) width;
        float heightRatio = (float) layoutHeight / (float) height;

        // 保持宽高比例，并使预览充满布局
        if (widthRatio > heightRatio) {
            childWidth = layoutWidth;
            childHeight = (int) ((float) height * widthRatio);
            childYOffset = (layoutHeight - childHeight) / 2;
        } else {
            childWidth = (int) ((float) width * heightRatio);
            childHeight = layoutHeight;
            childXOffset = (layoutWidth - childWidth) / 2;
        }

        for (int i = 0; i < getChildCount(); ++i) {
            getChildAt(i).layout(childXOffset, childYOffset, childXOffset + childWidth, childYOffset + childHeight);
        }

        try {
            startIfReady();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

3. 使用CameraSource.Builder设置相机图像大小：

import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;
import com.google.android.gms.vision.CameraSource;
import com.google.android.gms.vision.CameraSourcePreview;
import com.google.android.gms.vision.Detector;
import com.google.android.gms.vision.face.Face;
import com.google.android.gms.vision.face.FaceDetector;

import java.io.IOException;

public