如何在Android中将图像转换为byte [] [英] How to convert Image into byte[] in Android

问题描述

我想将图像保存在sqlite中.在这种方法中，我将图像路径转换为字符串.我的问题是如何将其转换为byte []格式.

I want to save image in sqlite. In this method I have got image path into string. My Question is How to convert it into byte[] format.

if (resultCode == RESULT_OK) {
// we need to update the gallery by starting MediaSanner service.
mScanner = new MediaScannerConnection(ImagePreviewActivity.this,new MediaScannerConnection.MediaScannerConnectionClient() {

                        public void onMediaScannerConnected() {
                                mScanner.scanFile(imageUri.getPath(), null );
                        }           

                        public void onScanCompleted(String path, Uri uri) {
                            mScanner.disconnect();
                            if (path.equals(imageUri.getPath())) {
                                 photoPath=imageUri.getPath();
                                        ImagePreviewActivity.this.runOnUiThread(new Runnable() {
                                        public void run() {
                                            capture_photo = (ImageView) findViewById(R.id.caturePhoto);
                                            Bitmap myBitmap = BitmapFactory.decodeFile(photoPath);
                                            capture_photo.setImageBitmap(myBitmap);

                                    }
                                });
                                mScanner.disconnect();
                            }
                        }
                    });
                    mScanner.connect();

推荐答案

首先将ImagePath转换为位图

First convert ImagePath to Bitmap

       Bitmap src=BitmapFactory.decodeFile(imagePath);

使用以下代码将位图转换为字节数组:

Convert bitmap into byte array using this code:

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        src.compress(Bitmap.CompressFormat.PNG, 100, baos);
        data = baos.toByteArray();

在发表问题后发表评论

要在imageview中显示字节数组，请使用以下代码行:

To show byte array into imageview use these lines of code:

   Bitmap bitmap = BitmapFactory.decodeByteArray(bitmapdata , 0, bitmapdata .length);

    imageView.setImageBitmap(bitmap);

要在imageView中显示imagePath，可以使用

To show imagePath into imageView you can use

                 Bitmap src=BitmapFactory.decodeFile(imagePath);
                 imageView.setImageBitmap(bitmap);

这篇关于如何在Android中将图像转换为byte []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！