如何图像转换成Android中字节数组 [英] How to convert Image into Byte Array in Android

问题描述

我现在面临一个真问题。我需要图像转换成字节数组格式，这样我就可以上传字节数组到Web服务器。我已经尝试了很多但是它不工作。我也越来越为字节数组负值。我不知道我做错了采取阵列字节值。

下面是我的code。请帮我什么，我做错了什么？

  BMP位图= BitmapFactory.de codeResource（getResources（），R.drawable.home_menu_icon）;
ByteArrayOutputStream BOS =新ByteArrayOutputStream（）;
bmp.com preSS（Bitmap.Com pressFormat.JPEG，100，BOS）;
字节[]数据= bos.toByteArray（）;
 

解决方案

下面我展示code两种，如果你的形象是从画廊和CAMERA

 如果（要求code == IMAGE_PICKER_REQUEST＆放大器;＆安培;结果code == RESULT_OK）{
        文件名= getRealPathFromURI（data.getData（））;        尝试{
             如果（位图！= NULL）{
                    bitmap.recycle（）;
                }
            InputStream的流= getContentResolver（）。openInputStream（
                    data.getData（））;            位= BitmapFactory.de codeStream（流）;
            stream.close（）;
            image.setImageBitmap（位图）;
            //picNameText.setText(\"Selected：EN
                // + getStringNameFromRealPath（文件名））;            ByteArrayOutputStream流1 =新ByteArrayOutputStream（）;
            bitmap.com preSS（Bitmap.Com pressFormat.PNG，100，流1）;
            imageInByte = stream1.toByteArray（）;        }赶上（FileNotFoundException异常五）{
            e.printStackTrace（）;
        }
        赶上（IOException异常五）{
            e.printStackTrace（）;
        }
    }    如果（要求code == IMAGE_TAKER_REQUEST＆放大器;＆安培;结果code == RESULT_OK）{
        。位图的照片=（位图）data.getExtras（）获得（数据）;
        image.setImageBitmap（照片）;        ByteArrayOutputStream流2 =新ByteArrayOutputStream（）;
        photo.com preSS（Bitmap.Com pressFormat.PNG，100，流2）;
        imageInByte = stream2.toByteArray（）;    }
 

享受它为我工作.....

I am facing one real issue. I need to convert image into byte array format, so that I can upload the byte array into web server. I have tried a lot however its not working. I am also getting negative values for byte array. I am not sure what i am doing wrong to take byte values in array.

Below is my code. Please help me what i am doing wrong?

Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.home_menu_icon);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, bos);
byte[] data = bos.toByteArray();

解决方案

Here i show code for both if your image is from GALLERY and CAMERA

if (requestCode == IMAGE_PICKER_REQUEST && resultCode == RESULT_OK) {
        fileName = getRealPathFromURI(data.getData());

        try {
             if (bitmap != null) {
                    bitmap.recycle();
                }
            InputStream stream = getContentResolver().openInputStream(
                    data.getData());

            bitmap = BitmapFactory.decodeStream(stream);
            stream.close();
            image.setImageBitmap(bitmap);
            //picNameText.setText("Selected: en"
                //  + getStringNameFromRealPath(fileName));

            ByteArrayOutputStream stream1 = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream1);
            imageInByte = stream1.toByteArray();

        }catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        catch (IOException e) {
            e.printStackTrace();
        } 
    }

    if (requestCode == IMAGE_TAKER_REQUEST && resultCode == RESULT_OK) {
        Bitmap photo = (Bitmap) data.getExtras().get("data");
        image.setImageBitmap(photo);

        ByteArrayOutputStream stream2 = new ByteArrayOutputStream();
        photo.compress(Bitmap.CompressFormat.PNG, 100, stream2);
        imageInByte = stream2.toByteArray();

    }

enjoy it work for me.....

这篇关于如何图像转换成Android中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！