如何在Android Studio中将imageview转换为字节数组? [英] How Can I convert an imageview to byte array in Android Studio?

问题描述

我的目标是获取用户选择的图片，并在其中填充图片视图.然后，在单击按钮时，该图像将被发送到Parse数据库.我知道我必须将imageview转换为字节数组，但是似乎不起作用.

My goal is to get a picture selected by the user and populate an image view with it. Then, on clicking a button, that image will be sent to a Parse database. I know I have to convert the imageview to byte array, but Doesn't seem to work.

任何帮助将不胜感激.这是我的代码:

Any help will be highly appreciated. here's my code:

 //send the imageviwew to parse database

 public void sendToParseBtn (View view){
     Bitmap bitmapImage = findViewById (R.id.imageView);
     ImageView imageView = (ImageView) findViewById(R.id.imageView);
     imageView.setImageBitmap(bitmapImage);

     ByteArrayOutputStream stream = new ByteArrayOutputStream();
     bitmapImage.compress(Bitmap.CompressFormat.JPEG, 40, stream);

     byte[] byteArray = stream.toByteArray();

     ParseFile file = new ParseFile("an.jpg",byteArray);
     ParseObject object = new ParseObject("MyParseObject");
     object.put("imageFile", file);

     object.saveInBackground();
 }

推荐答案

首先尝试将图像视图转换为可绘制的位图，然后获取byteArray:

Try converting the image view to a bitmap drawable first then get the byteArray:

ImageView imageView = (ImageView) findViewById(R.id.imageView);
Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] imageInByte = baos.toByteArray();
//save your stuff

这篇关于如何在Android Studio中将imageview转换为字节数组?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！