使用相机拍照会生成一个看起来像 Android 10 上的缩略图的图像文件

问：

我有一个用 Java 编写的 Android 应用程序，它使用相机应用程序拍照，然后将其保存为文件。在 Android KitKat 和 Lollipop 上一切正常，但在 Android 10 （Q） 上，保存的文件看起来更像是缩略图而不是大尺寸图片。

为了拍照，我按照 Android 开发者网站的说明进行操作：https://developer.android.com/training/camera/photobasics

启动意图的代码：

private void captureImage() {
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    Uri uri;

    File photoFile = null;

    try {
        photoFile = createImageFile();
    } catch (IOException ex) {
        // Error occurred while creating the File
    }

    if (photoFile == null) {
        return;
    }

    uri = FileProvider.getUriForFile(this, this.getApplicationContext().getPackageName() + ".provider", photoFile);

    intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        intent.addFlags(FLAG_GRANT_WRITE_URI_PERMISSION);
        intent.addFlags(FLAG_GRANT_READ_URI_PERMISSION);
    } else {
        List<ResolveInfo> resInfoList = getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
        for (ResolveInfo resolveInfo : resInfoList) {
            String packageName = resolveInfo.activityInfo.packageName;
            grantUriPermission(packageName, uri, FLAG_GRANT_WRITE_URI_PERMISSION | FLAG_GRANT_READ_URI_PERMISSION);
        }
    }

    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(intent, CAMERA_REQUEST_CODE);
    }
}

而我解码图像的代码如下：

public static Bitmap decodeSampledBitmapFromFile(String path, int imgWidth, int imgHeight) {

    Log.e("test image", "debut decodeSampledBitmapFromFile");
    //First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(path, options);

    // Calculate inSampleSize, Raw height and width of image
    final int height = options.outHeight;
    final int width = options.outWidth;
    Log.e("test image", "imgHeight =" + imgHeight + ", imgWidth =" + imgWidth);
    Log.e("test image", "height =" + height + ", width =" + width);

    options.inPreferredConfig = Bitmap.Config.RGB_565;
    int inSampleSize = 1;

    if (height > imgHeight) {
        inSampleSize = Math.round((float) height / (float) imgHeight);
    }

    Log.e("test", "inSampleSize =" + inSampleSize);
    int expectedWidth = width / inSampleSize;
    Log.e("test", "expectedWidth =" + expectedWidth);
    if (expectedWidth > imgWidth) {
        //if(Math.round((float)width / (float)reqWidth) > inSampleSize) // If bigger SampSize..
        inSampleSize = Math.round((float) width / (float) imgWidth);
    }
    Log.e("test", "inSampleSize =" + inSampleSize);
    options.inSampleSize = inSampleSize;

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;

    Log.e("test image", "fin decodeSampledBitmapFromFile");

    return BitmapFactory.decodeFile(path, options);
}

那么调用上述方法的代码如下：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // Résultat de la capture de la photo
    if (requestCode == CAMERA_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
            Bitmap imageBitmap1 = null;
            // File file = new File(Environment.getExternalStorageDirectory() + File.separator + "image.jpg");
            File file = new File(currentPhotoPath);
            Matrix matrix = null;
            try {

                ExifInterface exif = new ExifInterface(file.getPath());
                int rotation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
                int rotationInDegrees = exifToDegrees(rotation);
                matrix = new Matrix();
                if (rotation != 0f) {matrix.preRotate(rotationInDegrees);}
                if(rotationInDegrees == 90){
                    imageBitmap1 = Utils.decodeSampledBitmapFromFile(file.getAbsolutePath(), 500, 800);
                }else{
                    imageBitmap1 = Utils.decodeSampledBitmapFromFile(file.getAbsolutePath(), 800, 500);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

            imageBitmap = Bitmap.createBitmap(imageBitmap1, 0, 0, imageBitmap1.getWidth(), imageBitmap1.getHeight(), matrix, true);

            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            imageBitmap.compress(Bitmap.CompressFormat.JPEG, 50, stream);

            inputPhoto = stream.toByteArray();

KitKat 上的日志：imgHeight = 500，imgWidth = 800，height = 3264，width = 2448，inSampleSize = 7，expectedWidth = 349，inSampleSize = 7

Q 上的日志：imgHeight = 800，imgWidth = 500，height = 3376，width = 5984，inSampleSize = 4，expectedWidth = 1496，inSampleSize = 12