表面视图中质量差的相机光源？

Question

你好我在表面视图中有问题当我想在表面视图中查看相机时表面视图中相机的质量非常糟糕我想在我的表面视图中我的相机移动中的相同分辨率如何检查这个问题这是我的代码

    package comcd.example.mohamed_card_scanner.live;

import android.Manifest;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.util.SparseArray;
import android.util.StringBuilderPrinter;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.TextView;

import com.google.android.gms.vision.CameraSource;
import com.google.android.gms.vision.Detector;
import com.google.android.gms.vision.text.Text;
import com.google.android.gms.vision.text.TextBlock;
import com.google.android.gms.vision.text.TextRecognizer;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    SurfaceView cameraView;
    TextView textView;
    CameraSource cameraSource;
    final int RequestCameraPermissionID = 1001;

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode)
        {
            case RequestCameraPermissionID:
            {
                if(grantResults[0]==PackageManager.PERMISSION_GRANTED)
                {
                    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)
                        return;
                }
                try {
                    cameraSource.start(cameraView.getHolder());

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

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

        cameraView = (SurfaceView) findViewById(R.id.surface_view);



        textView = (TextView) findViewById(R.id.text_view);


        TextRecognizer textRecongnizer = new TextRecognizer.Builder(getApplicationContext()).build();
        if (!textRecongnizer.isOperational()) {
            Log.w("MainActivity", "Detector dependencies are not yet available");

        } else {


            cameraSource = new CameraSource.Builder(getApplicationContext(), textRecongnizer)
                    .setFacing(CameraSource.CAMERA_FACING_BACK)
                    .setAutoFocusEnabled(true)
                    .setRequestedPreviewSize(1280, 1024)
                    .setRequestedFps(2.0f)

                    .build();

           // (1280, 1024)


            //









            //





            cameraView.getHolder().addCallback(new SurfaceHolder.Callback() {
                @Override
                public void surfaceCreated(SurfaceHolder surfaceHolder) {

                    try {
                        if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {

                            ActivityCompat.requestPermissions(MainActivity.this,
                                    new String[]{Manifest.permission.CAMERA},
                                    RequestCameraPermissionID);
                            return;
                        }
                        cameraSource.start(cameraView.getHolder());
                    }catch (IOException e){
                        e.printStackTrace();
                    }
                }

                @Override
                public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {

                }

                @Override
                public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
                    cameraSource.stop();

                }
            });

            textRecongnizer.setProcessor(new Detector.Processor<TextBlock>() {
                @Override
                public void release() {

                }

                @Override
                public void receiveDetections(Detector.Detections<TextBlock> detections) {

                    final SparseArray<TextBlock> items= detections.getDetectedItems();

                    if(items.size()!=0)
                    {
                        textView.post(new Runnable() {
                            @Override
                            public void run() {
                                StringBuilder stringBuilder=new StringBuilder();
                                for(int i=0;i<items.size();++i)
                                {
                                    TextBlock item=items.valueAt(i);
                                    stringBuilder.append(item.getValue());
                                    stringBuilder.append("\n");
                                }

                                textView.setText(stringBuilder.toString());
                            }
                        });
                    }

                }
            });
        }
    }
























}