如何将二维码中的3个方块圈换成使用Paint Android使用zxing定制二维码？ [英] how to replace 3 squares to circle in QR Code to using paint android to customize QR code using zxing?
本文介绍了如何将二维码中的3个方块圈换成使用Paint Android使用zxing定制二维码？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我用它作为参考来定制(从正方形到圆形，使用zxing生成的二维码它是在Java中生成的，所以我尝试将其转换为在Android中使用
Generate QR codes with custom dot shapes using zxing 我在这里发布了我从Java转换为Android的代码
/* width = 300,
height =300,
quiet zone= 4;
*/
private Bitmap createQRCode2(String text, int width, int height, int quietZone) throws WriterException, IOException {
final Map<EncodeHintType, Object> encodingHints = new HashMap<>();
encodingHints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
QRCode code = Encoder.encode(text, ErrorCorrectionLevel.H, encodingHints);
ByteMatrix input = code.getMatrix();
if (input == null) {
throw new IllegalStateException();
}
int inputWidth = input.getWidth();
int inputHeight = input.getHeight();
int qrWidth = inputWidth + (quietZone * 2);
int qrHeight = inputHeight + (quietZone * 2);
int outputWidth = Math.max(width, qrWidth);
int outputHeight = Math.max(height, qrHeight);
int multiple = Math.min(outputWidth / qrWidth, outputHeight / qrHeight);
int leftPadding = (outputWidth - (inputWidth * multiple)) / 2;
int topPadding = (outputHeight - (inputHeight * multiple)) / 2;
final int FINDER_PATTERN_SIZE = 7;
final float CIRCLE_SCALE_DOWN_FACTOR = 21f / 30f;
int circleSize = (int) (multiple * CIRCLE_SCALE_DOWN_FACTOR);
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.WHITE);
paint.setAntiAlias(true);
canvas.drawRect(0, 0, width, height, paint);
paint.setColor(BLUE);
for (int inputY = 0, outputY = topPadding; inputY < inputHeight; inputY++, outputY += multiple) {
for (int inputX = 0, outputX = leftPadding; inputX < inputWidth; inputX++, outputX += multiple) {
if (input.get(inputX, inputY) == 1) {
if (!(inputX <= FINDER_PATTERN_SIZE && inputY <= FINDER_PATTERN_SIZE ||
inputX >= inputWidth - FINDER_PATTERN_SIZE && inputY <= FINDER_PATTERN_SIZE ||
inputX <= FINDER_PATTERN_SIZE && inputY >= inputHeight - FINDER_PATTERN_SIZE)) {
// graphics.fillOval(outputX, outputY, circleSize, circleSize);
canvas.drawCircle(outputX, outputY, circleSize, paint);
}
}
}
}
int circleDiameter = (multiple * FINDER_PATTERN_SIZE);
drawFinderPatternCircleStyle1(canvas, leftPadding, topPadding, circleDiameter, paint);
drawFinderPatternCircleStyle1(canvas, leftPadding + (inputWidth - FINDER_PATTERN_SIZE) * multiple, topPadding, circleDiameter, paint);
drawFinderPatternCircleStyle1(canvas, leftPadding, topPadding + (inputHeight - FINDER_PATTERN_SIZE) * multiple, circleDiameter, paint);
return bitmap;
}
private static void drawFinderPatternCircleStyle1(Canvas canvas, int x, int y, int circleDiameter, Paint paint) {
final int WHITE_CIRCLE_DIAMETER = circleDiameter * 5 / 7;
final int WHITE_CIRCLE_OFFSET = circleDiameter / 7;
final int MIDDLE_DOT_DIAMETER = circleDiameter * 3 / 7;
final int MIDDLE_DOT_OFFSET = circleDiameter * 2 / 7;
/*
below is java code which uses graphics to draw oval in andorid graphics2D and awt is not
available so I have drawn circle using canvas and paint
*/
// graphics.setColor(Color.black);
// graphics.fillOval(x, y, circleDiameter, circleDiameter);
// graphics.setColor(Color.white);
// graphics.fillOval(x + WHITE_CIRCLE_OFFSET, y + WHITE_CIRCLE_OFFSET, WHITE_CIRCLE_DIAMETER, WHITE_CIRCLE_DIAMETER);
// graphics.setColor(Color.black);
// graphics.fillOval(x + MIDDLE_DOT_OFFSET, y + MIDDLE_DOT_OFFSET, MIDDLE_DOT_DIAMETER, MIDDLE_DOT_DIAMETER);
/*
code that i have chnanged from above to covert from java to android
*/
paint.setColor(Color.BLACK);
canvas.drawCircle(x, y, circleDiameter, paint);
paint.setColor(WHITE);
canvas.drawCircle(x + WHITE_CIRCLE_OFFSET, y + WHITE_CIRCLE_OFFSET, WHITE_CIRCLE_DIAMETER, paint);
paint.setColor(BLUE);
canvas.drawCircle(x + MIDDLE_DOT_OFFSET, y + MIDDLE_DOT_OFFSET, MIDDLE_DOT_DIAMETER, paint);
}
如果我使用canvar.draOval()，它会获取左上、下、右三个值，其中我只有两个值，所以我有 用过的圆 实际绘制了内部圆圈，但有三个圆圈没有正确显示为链接 在这里发布我得到的图像日志结果
推荐答案
删除WHITE_CIRCLE_OFFSET和MIDDLE_DOT_OFFSET
paint.setColor(Color.BLACK);
canvas.drawCircle(x + circleDiameter / 1.5f, y + circleDiameter / 1.5f, circleDiameter, paint);
paint.setColor(WHITE);
canvas.drawCircle(x + circleDiameter / 1.5f, y + circleDiameter / 1.5f, WHITE_CIRCLE_DIAMETER, paint);
paint.setColor(BLUE);
canvas.drawCircle(x + circleDiameter / 1.5f, y + circleDiameter / 1.5f, MIDDLE_DOT_DIAMETER, paint);
以下是kotlin
@Throws(WriterException::class, IOException::class)
private fun roundedQRGenerator() {
CoroutineScope(IO).launch {
val hints = hashMapOf<EncodeHintType, Int>().also { it[EncodeHintType.MARGIN] = 1 } // Make the QR code buffer border narrower
val code = Encoder.encode(data, ErrorCorrectionLevel.H, hints)
val input = code.matrix ?: throw java.lang.IllegalStateException()
val width = 900
val height = 900
val quietZone = 2
val inputWidth = input.width
val inputHeight = input.height
val qrWidth = inputWidth + quietZone * 2
val qrHeight = inputHeight + quietZone * 2
val outputWidth = width.coerceAtLeast(qrWidth)
val outputHeight = height.coerceAtLeast(qrHeight)
val multiple = (outputWidth / qrWidth).coerceAtMost(outputHeight / qrHeight)
val leftPadding = (outputWidth - inputWidth * multiple) / 2
val topPadding = (outputHeight - inputHeight * multiple) / 2
val FINDER_PATTERN_SIZE = 7
val CIRCLE_SCALE_DOWN_FACTOR = 21f / 30f
val circleSize = (multiple * CIRCLE_SCALE_DOWN_FACTOR).toInt()
val bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
val canvas = Canvas(bitmap)
val paint = Paint()
paint.style = Paint.Style.FILL
paint.color = WHITE
paint.isAntiAlias = true
canvas.drawRect(0f, 0f, width.toFloat(), height.toFloat(), paint)
var color = BLACK
val background: Drawable = binding.roundedBgSetter.background
if (background is ColorDrawable) {
color = background.color
}
paint.color = color
var inputY = 0
var outputY = topPadding
while (inputY < inputHeight) {
var inputX = 0
var outputX = leftPadding
while (inputX < inputWidth) {
if (input[inputX, inputY].toInt() == 1) {
if (!(inputX <= FINDER_PATTERN_SIZE && inputY <= FINDER_PATTERN_SIZE || inputX >= inputWidth - FINDER_PATTERN_SIZE && inputY <= FINDER_PATTERN_SIZE || inputX <= FINDER_PATTERN_SIZE && inputY >= inputHeight - FINDER_PATTERN_SIZE)) {
canvas.drawCircle(
outputX.toFloat(),
outputY.toFloat(),
circleSize * 0.6f,
paint
)
}
}
inputX++
outputX += multiple
}
inputY++
outputY += multiple
}
val circleDiameter = multiple * FINDER_PATTERN_SIZE / 1.8f
drawFinderPatternCircleStyle1(canvas, leftPadding, topPadding, circleDiameter, paint)
drawFinderPatternCircleStyle1(
canvas,
leftPadding + circleSize + (inputWidth - FINDER_PATTERN_SIZE) * multiple,
topPadding,
circleDiameter,
paint
)
// drawFinderPatternCircleStyle1(canvas, leftPadding*2-4, ((topPadding*2) + (inputHeight - FINDER_PATTERN_SIZE) * multiple)-8, circleDiameter, paint);
drawFinderPatternCircleStyle1(
canvas,
leftPadding,
topPadding + circleSize + (inputHeight - FINDER_PATTERN_SIZE) * multiple,
circleDiameter,
paint
)
withContext(Main){
binding.qr.setImageBitmap(bitmap)
}
}
}
private fun drawFinderPatternCircleStyle1(
canvas: Canvas,
x: Int,
y: Int,
circleDiameter: Float,
paint: Paint
) {
val WHITE_CIRCLE_DIAMETER = circleDiameter * 5 / 7
val MIDDLE_DOT_DIAMETER = circleDiameter * 3 / 7
var color = BLACK
val background: Drawable = binding.roundedBgSetter.background
if (background is ColorDrawable) {
color = background.color
}
paint.color = color
canvas.drawCircle(
x + circleDiameter / 1.5f,
y + circleDiameter / 1.5f,
circleDiameter,
paint
)
paint.color = WHITE
canvas.drawCircle(
x + circleDiameter / 1.5f,
y + circleDiameter / 1.5f,
WHITE_CIRCLE_DIAMETER,
paint
)
paint.color = color
canvas.drawCircle(
x + circleDiameter / 1.5f,
y + circleDiameter / 1.5f,
MIDDLE_DOT_DIAMETER,
paint
)
}
这篇关于如何将二维码中的3个方块圈换成使用Paint Android使用zxing定制二维码？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！
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