BitmapFactory.decodeFile() 为现有图像返回 null

Question

我现在面临一个问题。 Why Bitmap.decodeFile() method is returning null? 我尝试了以下建议。 但上述建议对我没有帮助。

For directories reference

代码：

    private File createPhotoFile() throws IOException {
            String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
            String imageFileName = "IMG_" + timeStamp + "_";
            File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
            File image = File.createTempFile(imageFileName, ".png", storageDir);
            String mCurrentPhotoPath = image.toString();
    
            BitmapFactory.Options bmOptions = new BitmapFactory.Options();
            Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath,bmOptions);
            //bitmap = Bitmap.createScaledBitmap(bitmap,parent.getWidth(),parent.getHeight(),true);
            Bitmap markedImage = waterMark(bitmap, "your_string", Color.RED, 90, 90, true);
    
            File file = new File("path");
            OutputStream os = new BufferedOutputStream(new FileOutputStream(String.valueOf(markedImage)));
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, os);
            os.close();
            return file;
        }

Answer 1

创建后尝试添加 bmOptions.inMutable = true 或试试这个 answer.