问如何解决Android自定义摄像头自动裁剪图片的问题？

EN

import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.hardware.Camera;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.SurfaceHolder;
import android.widget.Toast;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.hardware.Camera;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.math.BigInteger;

class CameraActivity extends Activity implements Camera.PictureCallback, SurfaceHolder.Callback {

    public static final String EXTRA_CAMERA_DATA = "camera_data";

    private static final String KEY_IS_CAPTURING = "is_capturing";

    private Camera mCamera;
    private ImageView mCameraImage;
    private SurfaceView mCameraPreview;
    private Button mCaptureImageButton;
    private byte[] mCameraData;
    private boolean mIsCapturing;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_camera);

        DisplayMetrics displayMetrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
        int height = displayMetrics.heightPixels;
        int width = displayMetrics.widthPixels;
        Log.d("tag", "height oncreaate============= " + height + "width " + width);


        mCameraImage = (ImageView) findViewById(R.id.camera_image_view);
        mCameraImage.setVisibility(View.INVISIBLE);

        mCameraPreview = (SurfaceView) findViewById(R.id.preview_view);
        final SurfaceHolder surfaceHolder = mCameraPreview.getHolder();
        surfaceHolder.addCallback(this);
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

        mCaptureImageButton = (Button) findViewById(R.id.capture_image_button);
        mCaptureImageButton.setOnClickListener(mCaptureImageButtonClickListener);

        final Button doneButton = (Button) findViewById(R.id.done_button);
        doneButton.setOnClickListener(mDoneButtonClickListener);

        mIsCapturing = true;
    }

    @Override
    protected void onSaveInstanceState(Bundle savedInstanceState) {
        super.onSaveInstanceState(savedInstanceState);

        savedInstanceState.putBoolean(KEY_IS_CAPTURING, mIsCapturing);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);

        mIsCapturing = savedInstanceState.getBoolean(KEY_IS_CAPTURING, mCameraData == null);
        if (mCameraData != null) {
            setupImageDisplay();
        } else {
            setupImageCapture();
        }
    }

    @Override
    protected void onResume() {
        super.onResume();

        if (mCamera == null) {
            try {
                mCamera = Camera.open();
                mCamera.setPreviewDisplay(mCameraPreview.getHolder());
                if (mIsCapturing) {
                    mCamera.startPreview();
                }
            } catch (Exception e) {
                Toast.makeText(CameraActivity.this, "Unable to open camera.", Toast.LENGTH_LONG)
                        .show();
            }
        }
    }

    private View.OnClickListener mCaptureImageButtonClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            captureImage();
        }
    };

    private View.OnClickListener mRecaptureImageButtonClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            setupImageCapture();
        }
    };

    private View.OnClickListener mDoneButtonClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (mCameraData != null) {
                Intent intent = new Intent();
                intent.putExtra(EXTRA_CAMERA_DATA, mCameraData);
                setResult(RESULT_OK, intent);
            } else {
                setResult(RESULT_CANCELED);
            }
            finish();
        }
    };

    @Override
    protected void onPause() {
        super.onPause();

        if (mCamera != null) {

            mCamera.release();
            mCamera = null;
        }
    }

    @Override
    public void onPictureTaken(byte[] data, Camera camera) {


        mCameraData = data;
        setupImageDisplay();
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        if (mCamera != null) {
            try {
                mCamera.setPreviewDisplay(holder);
                if (mIsCapturing) {
                    mCamera.startPreview();
                }
            } catch (IOException e) {
                Toast.makeText(this, "Unable to start camera preview.", Toast.LENGTH_LONG).show();
            }
        }
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
    }

    private void captureImage() {
        mCamera.takePicture(null, null, this);
    }

    private void setupImageCapture() {
        mCameraImage.setVisibility(View.INVISIBLE);
        mCameraPreview.setVisibility(View.VISIBLE);
        mCamera.startPreview();
        mCaptureImageButton.setText(R.string.capture_image);
        mCaptureImageButton.setOnClickListener(mCaptureImageButtonClickListener);
    }

    private void setupImageDisplay() {
        DisplayMetrics displayMetrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
        int height = displayMetrics.heightPixels;
        int width = displayMetrics.widthPixels;
        Log.d("tag", "height " + height + "width " + width);
        BitmapFactory.Options scalingOptions = new BitmapFactory.Options();
        scalingOptions.inSampleSize = 5;
        final Bitmap bmp = BitmapFactory.decodeByteArray(mCameraData, 0, mCameraData.length, scalingOptions);

        mCameraImage.setImageBitmap(bmp);

        mCamera.stopPreview();
        mCameraPreview.setVisibility(View.INVISIBLE);
        mCameraImage.setVisibility(View.VISIBLE);
        mCaptureImageButton.setText(R.string.recapture_image);
        mCaptureImageButton.setOnClickListener(mRecaptureImageButtonClickListener);
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#999999"
    android:orientation="vertical" >

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/capturing_image" />

    <FrameLayout
        android:id="@+id/camera_frame"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" >

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

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:gravity="center"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/capture_image_button"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:text="@string/capture_image" />

        <Button
            android:id="@+id/done_button"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:text="@string/done" />
    </LinearLayout>

Camera.Parameters parameters = prCamera.getParameters();
        Camera.Size bestSize = null;
        prSupportedPreviewSizes =parameters.getSupportedPreviewSizes();
        mSupportedFlashModes = parameters.getSupportedFlashModes();
        bestSize = prSupportedPreviewSizes.get(0);
        for(int i = 1; i < prSupportedPreviewSizes.size(); i++){
            if((prSupportedPreviewSizes.get(i).width * prSupportedPreviewSizes.get(i).height) > (bestSize.width * bestSize.height)){
                bestSize = prSupportedPreviewSizes.get(i);
            }
        }



        List<Integer> supportedPreviewFormats =  parameters.getSupportedPreviewFormats();
        Iterator<Integer> supportedPreviewFormatsIterator = supportedPreviewFormats.iterator();
        while(supportedPreviewFormatsIterator.hasNext()){
            Integer previewFormat =supportedPreviewFormatsIterator.next();
            if (previewFormat == ImageFormat.YV12) {
                parameters.setPreviewFormat(previewFormat);
            }
        }

        List<Camera.Size> sizes = parameters.getSupportedPictureSizes();
        int w = 0, h = 0;
        for (Camera.Size size : sizes) {
            if (size.width > w || size.height > h) {
                w = size.width;
                h = size.height;
            }

        }


        parameters.setPreviewSize(bestSize.width, bestSize.height);

        parameters.setPictureSize(bestSize.width, bestSize.height);
        parameters.setPictureSize(w, h);
        parameters.setJpegQuality(100);


        // Set the camera to Auto Flash mode.
        if (mSupportedFlashModes != null && mSupportedFlashModes.contains(Camera.Parameters.FLASH_MODE_AUTO)){

            parameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
            prCamera.setParameters(parameters);
        }
        camera.setParameters(parameters);