从图库中选择图像时,图像会直线旋转

时间:2016-11-09 10:27:44

标签: java android image rotation exif

我从图库中选择图像并在图像视图中显示。图像正在被选中,但在三星手机上它有旋转图像的问题,以解决我正在检查图像是否旋转,如果旋转使其以适当的角度笔直。

但这对某些图片无效。我可以直接看到一些图像,但如果它们是直的,那么它们也会旋转。

private void onSelectFromGalleryResult(Intent data) {

    Bitmap bm=null;
    if (data != null) {
        try {
            bm = MediaStore.Images.Media.getBitmap(getApplicationContext().getContentResolver(), data.getData());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    ByteArrayOutputStream bytes = new ByteArrayOutputStream();

    bm = Bitmap.createScaledBitmap(bm,512,512, true);

    bm.compress(Bitmap.CompressFormat.PNG,100, bytes);
    File destination = new File(Environment.getExternalStorageDirectory(),
            System.currentTimeMillis() + ".png");
    FileOutputStream fo;
    try {
        destination.createNewFile();
        fo = new FileOutputStream(destination);
        fo.write(bytes.toByteArray());
        fo.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    loadImageFromFile(destination.getAbsolutePath());

}



public void loadImageFromFile(String imageFile){

    try {
        ExifInterface ei = new ExifInterface(imageFile);
        int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION,
                ExifInterface.ORIENTATION_UNDEFINED);

        Bitmap bitmap = BitmapFactory.decodeFile(imageFile);

        Bitmap rotatedBitmap = null;

        switch (orientation) {
            case ExifInterface.ORIENTATION_ROTATE_90:
                rotatedBitmap = rotateImage(bitmap, 90);
                break;
            case ExifInterface.ORIENTATION_ROTATE_180:
                rotatedBitmap = rotateImage(bitmap, 180);
                break;
            case ExifInterface.ORIENTATION_ROTATE_270:
                rotatedBitmap = rotateImage(bitmap, 270);
                break;
            case ExifInterface.ORIENTATION_NORMAL:
            default:
                rotatedBitmap = bitmap;
                break;
        }

        if(rotatedBitmap != null)
        {
            profile_image.setImageBitmap(rotatedBitmap);
            selectedBitmap = rotatedBitmap;

            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            selectedBitmap.compress(Bitmap.CompressFormat.PNG, 100, stream); //replace 100 with desired quality percentage.
            byte[] byteArray = stream.toByteArray();

                File tempFile = File.createTempFile("temp",null, getCacheDir());
                FileOutputStream fos = new FileOutputStream(tempFile);
                fos.write(byteArray);

                mProfileImage = tempFile;
        }

    }
    catch (IOException ex) {
      //  UiUtils.showAlert(getString(R.string.error),NewGroupAcvitity.this);
    }
}

public static Bitmap rotateImage(Bitmap source, float angle) {
    Matrix matrix = new Matrix();
    matrix.postRotate(angle);
    return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix,
            true);
}

旋转位图我从exif界面获取为null仍然会旋转图像视图上的图像。

这里出了什么问题?有人可以帮忙吗?谢谢..

0 个答案:

没有答案
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