ocrsearch的横屏转竖屏的解决方案

Posted 2020-08-31 ぶ会编程的狗子进阶史

//这是其中解决预览图的一部分（坑了好久的）
@Override
public void onPreviewFrame(byte[] data, Camera camera) {

    Size previewSize = camera.getParameters().getPreviewSize();
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte[] rawImage = null;

    // Decode image from the retrieved buffer to JPEG
    YuvImage yuv = new YuvImage(data, ImageFormat.NV21, previewSize.width, previewSize.height, null);
    yuv.compressToJpeg(new Rect(0, 0, previewSize.width, previewSize.height), YOUR_JPEG_COMPRESSION, baos);
    rawImage = baos.toByteArray();

    // This is the same image as the preview but in JPEG and not rotated
    Bitmap bitmap = BitmapFactory.decodeByteArray(rawImage, 0, rawImage.length);
    ByteArrayOutputStream rotatedStream = new ByteArrayOutputStream();

    // Rotate the Bitmap
    Matrix matrix = new Matrix();
    matrix.postRotate(YOUR_DEFAULT_ROTATION);

    // We rotate the same Bitmap
    bitmap = Bitmap.createBitmap(bitmap, 0, 0, previewSize.width, previewSize.height, matrix, false);

    // We dump the rotated Bitmap to the stream 
    bitmap.compress(CompressFormat.JPEG, YOUR_JPEG_COMPRESSION, rotatedStream);

    rawImage = rotatedStream.toByteArray();

    // Do something we this byte array
}

　　转自：http://stackoverflow.com/questions/15131663/how-to-change-orientation-of-captured-byte-frames-through-onpreviewframe-callb