97 lines
3.6 KiB
Kotlin
97 lines
3.6 KiB
Kotlin
package uts.sdk.modules.masCodeScan
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import android.content.Context
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import android.graphics.Bitmap
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import android.graphics.Canvas
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import android.graphics.Color
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import android.graphics.Paint
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import android.graphics.RectF
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import android.graphics.Typeface
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import android.view.View
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import kotlin.math.min
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/**
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* 连续扫码成功提示层：覆盖扫描框中部，显示成功状态和本次扫码值。
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*/
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class ContinuousSuccessOverlayView(
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context: Context,
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private val successHint: String
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) : View(context) {
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private val density = resources.displayMetrics.density
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private val scaledDensity = resources.displayMetrics.scaledDensity
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private val panelPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
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color = Color.argb(218, 48, 48, 48)
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style = Paint.Style.FILL
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}
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private val titlePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
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color = Color.WHITE
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textSize = 16f * scaledDensity
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textAlign = Paint.Align.CENTER
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typeface = Typeface.DEFAULT_BOLD
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}
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private val valuePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
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color = Color.WHITE
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textSize = 15f * scaledDensity
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textAlign = Paint.Align.CENTER
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}
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private val panelRect = RectF()
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private var frameRect = RectF()
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private var stillFrame: Bitmap? = null
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private var value = ""
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fun showSuccess(scanFrame: RectF, content: String, bitmap: Bitmap?) {
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stillFrame?.recycle()
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stillFrame = bitmap
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frameRect = RectF(scanFrame)
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value = content
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visibility = VISIBLE
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invalidate()
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}
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fun hideSuccess() {
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stillFrame?.recycle()
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stillFrame = null
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value = ""
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visibility = GONE
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invalidate()
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}
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override fun onDraw(canvas: Canvas) {
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super.onDraw(canvas)
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if (value.isBlank() || width <= 0 || height <= 0) return
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stillFrame?.takeIf { !it.isRecycled && it.width > 0 && it.height > 0 }?.let { bitmap ->
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val bitmapWidth = bitmap.width.toFloat()
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val bitmapHeight = bitmap.height.toFloat()
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val scale = maxOf(width / bitmapWidth, height / bitmapHeight)
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val drawWidth = bitmapWidth * scale
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val drawHeight = bitmapHeight * scale
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val left = (width - drawWidth) / 2f
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val top = (height - drawHeight) / 2f
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canvas.drawBitmap(bitmap, null, RectF(left, top, left + drawWidth, top + drawHeight), null)
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}
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val availableWidth = if (frameRect.isEmpty) width.toFloat() else frameRect.width()
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val panelWidth = min(300f * density, maxOf(0f, availableWidth - 24f * density))
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val panelHeight = 68f * density
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val centerX = if (frameRect.isEmpty) width / 2f else frameRect.centerX()
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val centerY = if (frameRect.isEmpty) height / 2f else frameRect.centerY()
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panelRect.set(
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centerX - panelWidth / 2f,
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centerY - panelHeight / 2f,
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centerX + panelWidth / 2f,
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centerY + panelHeight / 2f
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)
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panelRect.left = panelRect.left.coerceAtLeast(12f * density)
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panelRect.right = panelRect.right.coerceAtMost(width - 12f * density)
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panelRect.top = panelRect.top.coerceAtLeast(24f * density)
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panelRect.bottom = panelRect.bottom.coerceAtMost(height - 24f * density)
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canvas.drawRoundRect(panelRect, 12f * density, 12f * density, panelPaint)
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val titleBaseline = panelRect.centerY() - 3f * density
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val valueBaseline = panelRect.centerY() + 19f * density
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canvas.drawText(successHint, panelRect.centerX(), titleBaseline, titlePaint)
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canvas.drawText(value, panelRect.centerX(), valueBaseline, valuePaint)
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}
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}
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