Android：如何将位图图像传递给ArrayList <Bitmap> 并检索它

Question

"Base64Parts" is a string that has been split to equal parts, and I am trying to generate a QR code for each string and place it in a arraylist so that i can retrieve it and generate a GIF. Am I adding the bitmap images to the arraylist in the correct way? Because i can only retrieve " bmp_images.get(0) ". Not others (eg-bmp_images.get(1)) . My code is given below.

//Declaring QR code generator
QRCodeWriter writer = new QRCodeWriter();

//Declaring Array
ArrayList<Bitmap> bmp_images = new ArrayList<Bitmap>();
for (int i = 0; i < numberOfPartsSplit; i++){

    try {
        Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
        hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
        BitMatrix bitMatrix = writer.encode(Base64Parts.get(i), BarcodeFormat.QR_CODE, 512, 512, hintMap);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                bmp.setPixel(x, y, bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE);
            }
        }

        bmp_images.add(i,bmp); //the code added for arraylist of images

        ((ImageView) findViewById(R.id.image_holder)).setImageBitmap(bmp_images.get(0)); //use different values

    } catch (WriterException e) {
        e.printStackTrace();
    }

Answer 1

((ImageView) findViewById(R.id.image_holder)).setImageBitmap(bmp_images.get(0));

paste this line outside for loop. Once all iteration done, set the needed index to get that particular value.