Как изменить размер CameraSource, например setPreviewSize и PictureSize ⇐ Android

[Anonymous]

Это относится к API Google Vision. CameraPreview хорошо работает в полноэкранном режиме. Но изображение искажается при предварительном просмотре камеры в коробке.

Это код, который я использовал. Моя проблема в том, что предварительный просмотр заполняет поле, но предварительный просмотр растянут, и я не могу настроить размер cameraPreview. Переменная CameraPreview имеет тип SurfaceView. Я использую CameraSource для запуска предварительного просмотра. Есть ли способ изменить размер CameraPreview (SurfaceView) и поместить кадр предварительного просмотра в поле?

cameraPreview.getHolder().addCallback(new SurfaceHolder.Callback() {
protected List mPreviewSizeList;
protected List mPictureSizeList;
protected Camera.Size mPreviewSize;
protected Camera.Size mPictureSize;
protected boolean mSurfaceChanged = false;
private int mSurfaceChangedCallDepth = 0;
private int mCenterPosX = -1;
private int mCenterPosY = 0;
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(ClientIdScannerActivity.this,
new String[]{Manifest.permission.CAMERA}, RequestCameraPermissionId);
Toast.makeText(ClientIdScannerActivity.this, "The App requires this permission", Toast.LENGTH_SHORT).show();
return;
}
try {
cameraSource.start(cameraPreview.getHolder());
} catch (Exception ex) {
ex.printStackTrace();
}
}
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {
mSurfaceChangedCallDepth++;

/* cameraSource.stop();

Camera.Parameters cameraParams = mCamera.getParameters();

if (!mSurfaceChanged) {
Camera.Size previewSize = determinePreviewSize(cameraWidth, cameraHight);
Camera.Size pictureSize = determinePictureSize(previewSize);
mPreviewSize = previewSize;
mPictureSize = pictureSize;
mSurfaceChanged = adjustSurfaceLayoutSize(previewSize,i1, i2);

if (mSurfaceChanged && (mSurfaceChangedCallDepth = Build.VERSION_CODES.N ? 270 : 90);
}*/

// cameraParams.setRotation(270);
// mCamera.setDisplayOrientation(UtilFunctions.isTablet() ? 90 : 270);

/* cameraParams.set("orientation", "portrait");
// cameraParams.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
cameraParams.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
cameraParams.setPictureSize(mPictureSize.width, mPictureSize.height);
if (cameraParams.getSupportedFocusModes().contains(
Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
cameraParams.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
}*/

mSurfaceChanged = false;

try {
if (ActivityCompat.checkSelfPermission(ClientIdScannerActivity.this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
Toast.makeText(ClientIdScannerActivity.this, "App requires Camera permission to scan ID", Toast.LENGTH_SHORT).show();
return;
}
cameraSource.start(cameraPreview.getHolder());
} catch (Exception e) {
// Remove failed size

// Reconfigure
if (mPreviewSizeList.size() > 0) { // prevent infinite loop
surfaceChanged(null, 0, i1, i2);
} else {
// Utils.showToast(CameraNewActivity.this, "Can't start preview", Toast.LENGTH_LONG);
}
}

mSurfaceChangedCallDepth--;
}

protected Camera.Size determinePreviewSize(int reqWidth, int reqHeight) {

int reqPreviewWidth = 640;//reqHeight; // requested width in terms of camera hardware
int reqPreviewHeight = 480;// reqWidth; // requested height in terms of camera hardware
Camera.Size retSize = null;
for (Camera.Size size : mPreviewSizeList) {
if (size.width == reqPreviewWidth && size.height == reqPreviewHeight) {
retSize = size;
}
}
// retSize = mPreviewSizeList.get(mPreviewSizeList.size()-1);
return retSize;
}

protected Camera.Size determinePictureSize(Camera.Size previewSize) {
Camera.Size retSize = null;
for (Camera.Size size : mPictureSizeList) {
if (size.equals(previewSize)) {
return size;
}
}

// if the preview size is not supported as a picture size
float reqRatio = ((float) previewSize.width) / previewSize.height;
float curRatio, deltaRatio;
float deltaRatioMin = Float.MAX_VALUE;
for (Camera.Size size : mPictureSizeList) {
curRatio = ((float) size.width) / size.height;
deltaRatio = Math.abs(reqRatio - curRatio);
if (deltaRatio < deltaRatioMin) {
deltaRatioMin = deltaRatio;
retSize = size;
}
}

return retSize;
}

protected boolean adjustSurfaceLayoutSize(Camera.Size previewSize,
int availableWidth, int availableHeight) {

float tmpLayoutHeight = previewSize.width;
float tmpLayoutWidth = previewSize.height;

float factH, factW, fact;
factH = availableHeight / tmpLayoutHeight;
factW = availableWidth / tmpLayoutWidth;

// if (factH < factW) {
// fact = factH;
// } else {
fact = factW;
// }

FrameLayout.LayoutParams layoutParams =(FrameLayout.LayoutParams) cameraPreview.getLayoutParams();
int layoutHeight = (int) (tmpLayoutHeight * fact);
int layoutWidth = (int) (tmpLayoutWidth * fact);

boolean layoutChanged;
if ((layoutWidth != cameraPreview.getWidth()) || (layoutHeight != cameraPreview.getHeight())) {
layoutParams.height = layoutHeight;
layoutParams.width = layoutWidth;
if (mCenterPosX >= 0) {
layoutParams.topMargin = mCenterPosY - (layoutHeight / 2);
layoutParams.leftMargin = mCenterPosX - (layoutWidth / 2);
}
cameraPreview.setLayoutParams(layoutParams); // this will trigger another surfaceChanged invocation.
layoutChanged = true;
} else {
layoutChanged = false;
}

return layoutChanged;
}

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


Подробнее здесь: https://stackoverflow.com/questions/476 ... icturesize