package cn.flightfeather.thirdapp.util.photo
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import android.app.Activity
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import android.content.res.Resources
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import android.graphics.*
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import android.os.Build
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import android.support.annotation.ColorInt
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import android.support.annotation.IdRes
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import android.support.annotation.IntegerRes
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import android.util.DisplayMetrics
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import cn.flightfeather.thirdapp.R
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import cn.flightfeather.thirdapp.util.DateFormatter
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import cn.flightfeather.thirdapp.util.dp
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import cn.flightfeather.thirdapp.util.sp
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import java.util.*
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import java.util.regex.Pattern
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import kotlin.math.max
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import kotlin.math.roundToInt
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/**
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* @author riku
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* Date: 2020/5/9
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* 图片、文本合并工具
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* 规定合并的图片为1~3张, 其中纵向的图片规定宽度保持为屏幕宽度的1/3进行缩放, 横向的图则根据图片张数和横纵组合自适应,具体看代码.
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*/
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class ImageMergeUtil(activity: Activity) {
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private val padding = 4F.dp
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private val bgWidth:Float
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private val bgHeight: Float
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private val textPaint:Paint
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private val indexPaint:Paint
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private val titlePaint:Paint
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//设定每行最大图片数
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val colNum = 3
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init {
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val dm = DisplayMetrics()
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
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activity.windowManager.defaultDisplay.getRealMetrics(dm)
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} else {
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activity.windowManager.defaultDisplay.getMetrics(dm)
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}
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bgWidth = dm.widthPixels.toFloat()
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bgHeight = dm.heightPixels.toFloat()
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textPaint = Paint().apply {
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textAlign = Paint.Align.LEFT
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color = Color.BLACK
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style = Paint.Style.FILL
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// strokeWidth = density * 2
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isAntiAlias = true
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textSize = 14f.sp
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}
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indexPaint = Paint().apply {
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textAlign = Paint.Align.CENTER
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color = Color.BLACK
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style = Paint.Style.FILL
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// strokeWidth = density * 2
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isAntiAlias = true
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textSize = 14f.sp
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}
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titlePaint = Paint().apply {
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textAlign = Paint.Align.LEFT
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color = Color.BLACK
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style = Paint.Style.FILL
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isAntiAlias = true
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textSize = 14f.sp
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typeface = Typeface.create(Typeface.DEFAULT, Typeface.BOLD)
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}
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}
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fun mergeImage(bitmaps: MutableList<Bitmap>): Bitmap? {
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var result: Bitmap? = null
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val lengthWays = isLengthWays(bitmaps)
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when (bitmaps.size) {
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1 -> {
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when (lengthWays) {
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"h" -> {
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val b = resizeBitmap(bitmaps[0], (bgWidth - padding * 4) / 3)
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result = createCanvas(b.width + padding.toInt() * 2, b.height + padding.toInt() * 2) {
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it.drawBitmap(b, padding, padding, null)
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}
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}
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"w" -> {
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val b = resizeBitmap(bitmaps[0], newHeight = (bgHeight - padding * 2) / 4)
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result = createCanvas(b.width + padding.toInt() * 2, b.height + padding.toInt() * 2) {
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it.drawBitmap(b, padding, padding, null)
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}
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}
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}
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}
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2 -> {
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when (lengthWays) {
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"hh" -> {
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val b0 = resizeBitmap(bitmaps[0], (bgWidth - padding * 4) / 3)
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val b1 = resizeBitmap(bitmaps[1], (bgWidth - padding * 4) / 3)
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result = createCanvas(b0.width + b1.width + padding.toInt() * 3, b0.height + padding.toInt() * 2) {
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it.drawBitmap(b0, padding, padding, null)
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it.drawBitmap(b1, b0.width + padding * 2, padding, null)
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}
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}
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"hw" -> {
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val b0 = resizeBitmap(bitmaps[0], (bgWidth - padding * 4) / 3)
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val b1 = resizeBitmap(bitmaps[1], newHeight = b0.height.toFloat())
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result = createCanvas(b0.width + b1.width + padding.toInt() * 3, b0.height + padding.toInt() * 2) {
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it.drawBitmap(b0, padding, padding, null)
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it.drawBitmap(b1, b0.width + padding * 2, padding, null)
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}
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}
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"ww" -> {
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val b0 = bitmaps[1]
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var b1 = bitmaps[1]
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if (bitmaps[0].height != bitmaps[1].width) {
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b1 = resizeBitmap(bitmaps[1], newHeight = bitmaps[0].height.toFloat())
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}
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result = createCanvas(b0.width + b1.width + padding.toInt() * 3, b0.height + padding.toInt() * 2) {
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it.drawBitmap(b0, padding, padding, null)
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it.drawBitmap(b1, b0.width + padding * 2, padding, null)
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}
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}
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}
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}
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3 -> {
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when (lengthWays) {
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"hhh" -> {
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val b0 = resizeBitmap(bitmaps[0], (bgWidth - padding * 4) / 3)
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val b1 = resizeBitmap(bitmaps[1], (bgWidth - padding * 4) / 3)
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val b2 = resizeBitmap(bitmaps[2], (bgWidth - padding * 4) / 3)
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result = createCanvas((b0.width + padding.toInt()) * 3, b0.height + padding.toInt() * 2) {
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it.drawBitmap(b0, padding, padding, null)
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it.drawBitmap(b1, b0.width + padding * 2, padding, null)
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it.drawBitmap(b2, b0.width + b1.width + padding * 3, padding, null)
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}
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}
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"hww" -> {
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val b0 = resizeBitmap(bitmaps[0], (bgWidth - padding * 4) / 3)
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val b1 = resizeBitmap(bitmaps[1], newHeight = (b0.height - padding) / 2)
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val b2 = resizeBitmap(bitmaps[2], newHeight = (b0.height - padding) / 2)
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result = createCanvas(b0.width + b1.width + padding.toInt() * 3, b0.height + padding.toInt() * 2) {
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it.drawBitmap(b0, padding, padding, null)
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it.drawBitmap(b1, b0.width + padding * 2, padding, null)
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it.drawBitmap(b2, b0.width + padding * 2, b1.height + padding, null)
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}
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}
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"hhw" -> {
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val b0 = resizeBitmap(bitmaps[0], (bgWidth - padding * 4) / 3)
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val b1 = resizeBitmap(bitmaps[1], (bgWidth - padding * 4) / 3)
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val b2 = resizeBitmap(bitmaps[2], b0.width.toFloat() * 2 + padding)
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result = createCanvas((b0.width + padding.toInt()) * 3, b0.height + padding.toInt() * 2) {
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it.drawBitmap(b0, padding, padding, null)
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it.drawBitmap(b1, b0.width + padding * 2, padding, null)
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it.drawBitmap(b2, padding, b0.height + padding, null)
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}
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}
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"www" -> {
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val b0 = bitmaps[0]
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var b1 = bitmaps[1]
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var b2 = bitmaps[2]
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if (b1.width != b0.width) {
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b1 = resizeBitmap(b1, b0.width.toFloat())
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}
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if (b2.width != b0.width) {
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b2 = resizeBitmap(b2, b0.width.toFloat())
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}
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result = createCanvas(b0.width + padding.toInt() * 2, b0.height + padding.toInt() * 2) {
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it.drawBitmap(b0, padding, padding, null)
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it.drawBitmap(b1, padding, b0.height + padding * 2, null)
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it.drawBitmap(b2, padding, b0.height * 2 + padding * 3, null)
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}
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}
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}
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}
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}
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return result
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}
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/**
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* 返回图片的横向, 纵向组合信息
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* 确保纵向图片永远排在前面
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* @param bitmaps 图片数量
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* @return w: 横向; h: 纵向
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*/
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private fun isLengthWays(bitmaps: MutableList<Bitmap>): String {
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var result = ""
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val tempList = mutableListOf<Bitmap>()
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bitmaps.forEach {
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if (it.width >= it.height) {
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tempList.add(it)
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result += "w"
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} else {
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tempList.add(0,it)
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result = "h$result"
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}
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}
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bitmaps.clear()
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bitmaps.addAll(tempList)
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return result
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}
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fun mergeVertical(bitmap1: Bitmap, bitmap2: Bitmap): Bitmap {
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val result: Bitmap
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val width = max(bitmap1.width, bitmap2.width)
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if (bitmap2.width != bitmap1.width && (bitmap1.width > bgWidth || bitmap2.width > bgWidth)) {
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val h2 = bitmap2.height * width / bitmap2.width
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result = Bitmap.createBitmap(width, bitmap1.height + h2, Bitmap.Config.ARGB_8888)
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val canvas = Canvas(result)
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val newBitmap2 = resizeBitmap(bitmap2, width.toFloat(), h2.toFloat())
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canvas.drawBitmap(bitmap1, 0F, padding * 4, null)
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canvas.drawBitmap(newBitmap2, 0F, bitmap1.height.toFloat() + padding, null)
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} else {
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result = Bitmap.createBitmap(width, bitmap1.height + bitmap2.height, Bitmap.Config.ARGB_8888)
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val canvas = Canvas(result)
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canvas.drawBitmap(bitmap1, 0F, padding, null)
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canvas.drawBitmap(bitmap2, 0F, bitmap1.height.toFloat() + padding * 4, null)
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}
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return result
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}
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fun mergeHorizontal(bitmap1: Bitmap, bitmap2: Bitmap): Bitmap {
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val result: Bitmap
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val height = bitmap1.height
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if (bitmap2.height != height) {
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val w2 = bitmap2.width * height / bitmap2.height
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result = Bitmap.createBitmap(
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(bitmap1.width + w2 + padding * 3).toInt(),
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(height + padding * 2).toInt(),
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Bitmap.Config.ARGB_8888
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)
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val canvas = Canvas(result)
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val newBitmap2 = resizeBitmap(bitmap2, w2.toFloat(), height.toFloat())
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canvas.drawBitmap(bitmap1, padding, padding, null)
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canvas.drawBitmap(newBitmap2, bitmap1.width.toFloat() + padding * 2, padding, null)
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} else {
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result = Bitmap.createBitmap(
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(bitmap1.width + bitmap2.width + padding * 3).toInt(),
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(height + padding * 2).toInt(), Bitmap.Config.ARGB_8888
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)
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val canvas = Canvas(result)
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canvas.drawBitmap(bitmap1, padding, padding, null)
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canvas.drawBitmap(bitmap2, bitmap1.width.toFloat() + padding * 2, padding, null)
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}
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return result
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}
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/**
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* 合并图片和一段文字
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* 当图片的宽度大于屏幕宽度时，默认将文本合成在图片下方
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* 当图片的宽度小于屏幕宽度时，默认将文本合成在图片右侧
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*/
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fun mergeVerticalText(bitmap: Bitmap, text: String, title: String? = null, titleIcon: Int = 0, res: Resources? = null): Bitmap {
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var textMaxWidth = bgWidth - padding * 2
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if (bitmap.width < bgWidth / 2) {
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textMaxWidth = bgWidth - bitmap.width - padding * 2
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}
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val bounds = Rect()
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var textArray = arrayOf<String>()
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/* 中文字符，首行缩进 */
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val p = Pattern.compile("[\u4e00-\u9fa5]")
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val m = p.matcher(text)
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val textIndent = if (m.find()) {
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"\u3000\u3000$text"
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// text
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} else {
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text
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}
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/* 文本换行 */
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textArray = linefeed(textIndent, textMaxWidth, textPaint)
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val fontMetrics = textPaint.fontMetrics
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val textHeight = fontMetrics.bottom - fontMetrics.top
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val totalTextHeight = textHeight * textArray.size
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/* 根据屏幕大小重绘新的图片宽高，确保文本字体显示不会被缩小 */
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val scaledBitmap = if (bitmap.width > bgWidth) {
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resizeBitmap(bitmap, bgWidth, bitmap.height * bgWidth / bitmap.width)
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} else {
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bitmap
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}
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val newWidth = max(scaledBitmap.width, bgWidth.toInt())
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var newHeight = scaledBitmap.height + padding.toInt() * 5 + totalTextHeight.toInt()
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if (scaledBitmap.width < bgWidth / 2) {
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newHeight = max(scaledBitmap.height, totalTextHeight.toInt()) + padding.toInt() * 2
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} else if (title != null) {
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val fm = titlePaint.fontMetrics
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val h = fm.bottom - fm.top
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newHeight += (h + padding).toInt()
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}
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val newBitmap = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888)
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val canvas = Canvas(newBitmap)
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canvas.drawBitmap(scaledBitmap, 0F, 0F, null)
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var x = padding
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var y = scaledBitmap.height + padding - fontMetrics.top
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if (scaledBitmap.width < bgWidth / 2) {
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x = scaledBitmap.width.toFloat()
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y = -fontMetrics.top
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}
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if (title != null) {
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val fm = titlePaint.fontMetrics
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val h = fm.bottom - fm.top
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val options = BitmapFactory.Options().apply {
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outWidth = h.toInt()
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outHeight = h.toInt()
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}
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val icon = BitmapFactory.decodeResource(res, titleIcon, options)
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canvas.drawBitmap(icon, x, y + fm.ascent, null)
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canvas.drawText(title, x + h + padding, y, titlePaint)
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y += h + padding
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}
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textArray.forEach {
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canvas.drawText(it, x, y, textPaint)
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y += textHeight
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}
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return newBitmap
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}
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fun mergeText(bitmap1: Bitmap, text: String, coordinate: Pair<Float, Float>): Bitmap {
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val result = Bitmap.createBitmap(bitmap1.width, bitmap1.height, Bitmap.Config.ARGB_8888)
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val canvas = Canvas(result)
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canvas.drawBitmap(bitmap1, 0F, 0F, null)
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canvas.drawText(text, coordinate.first, coordinate.second, null)
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return result
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}
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fun createTitle(text: String, time: Date?): Bitmap {
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val timeStr = DateFormatter.dateFormat.format(time)
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val tFm = textPaint.fontMetrics
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val tH = tFm.bottom - tFm.top
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val b = Bitmap.createBitmap(bgWidth.toInt(), 1, Bitmap.Config.ARGB_8888)
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val textMaxWidth = bgWidth - padding * 2
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val textArray = linefeed(text, textMaxWidth, titlePaint)
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val fm = titlePaint.fontMetrics
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val h = fm.bottom - fm.top
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val result = Bitmap.createBitmap(bgWidth.toInt(), (b.height + h * textArray.size + tH + padding * 2).roundToInt(), Bitmap.Config.ARGB_8888)
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var y = padding + b.height - fm.top
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Canvas(result).apply {
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textArray.forEach {
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val x = max(bgWidth / 2 - titlePaint.measureText(it) / 2, padding)
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drawText(it, x, y, titlePaint)
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y += h
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}
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y -= h
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val tWidth = textPaint.measureText(timeStr)
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val x = bgWidth - padding - tWidth
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y += tH
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drawText(timeStr, x, y, textPaint)
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}
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return result
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}
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fun mergeIndex(bitmap: Bitmap, index: Int, res: Resources): Bitmap {
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val l = "-"
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val indexText = if (index < 10) {
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"0$index"
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} else {
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"$index"
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}
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val indexWidth = indexPaint.measureText(indexText)
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val halfWidth = (bitmap.width - indexWidth - padding * 4) / 2
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val w = textPaint.measureText(l)
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val count = (halfWidth / w).toInt()
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val label = StringBuilder()
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repeat(count) {
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label.append(l)
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}
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val labelWidth = textPaint.measureText(label.toString())
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val indexFm = indexPaint.fontMetrics
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val labelFm = textPaint.fontMetrics
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val imageWidth = max(indexWidth, indexFm.bottom - indexFm.top)
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val options = BitmapFactory.Options().apply {
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outWidth = imageWidth.toInt()
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outHeight = imageWidth.toInt()
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}
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val image = BitmapFactory.decodeResource(res, R.mipmap.ic_feiyu, options)
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val h = max((indexFm.bottom - indexFm.top) * 2, labelFm.bottom - labelFm.top) + padding
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val result = Bitmap.createBitmap(bitmap.width, bitmap.height + h.toInt(), Bitmap.Config.ARGB_8888)
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val canvas = Canvas(result)
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canvas.drawBitmap(bitmap, 0F, 0F, null)
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canvas.drawText(label.toString(), 0F, bitmap.height + padding * 2 - indexFm.top + indexFm.bottom, textPaint)
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canvas.drawText(label.toString(), bitmap.width - labelWidth, bitmap.height + padding * 2 - indexFm.top + indexFm.bottom, textPaint)
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val centreX = bitmap.width / 2
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canvas.drawText(indexText, centreX - indexWidth / 2, bitmap.height + padding * 2 - indexFm.top, textPaint)
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canvas.drawBitmap(image, centreX - imageWidth / 2, bitmap.height + padding * 2 - indexFm.top + indexFm.bottom, null)
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return result
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}
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fun mergeTitle(bitmap: Bitmap, title: String): Bitmap {
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titlePaint
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return bitmap
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}
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fun drawBg(bitmap: Bitmap, @ColorInt bgColor: Int): Bitmap {
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Canvas(bitmap).drawColor(bgColor, PorterDuff.Mode.DST_OVER)
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return bitmap
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}
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private fun createCanvas(width: Int, height: Int, onDraw: (canvas: Canvas) -> Unit): Bitmap {
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val b = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
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onDraw(Canvas(b))
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return b
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}
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private fun resizeBitmap(bitmap: Bitmap, newWidth: Float? = null, newHeight: Float? = null): Bitmap {
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var scaleW = newWidth?.let { it / bitmap.width }
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var scaleH = newHeight?.let { it / bitmap.height }
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if (scaleW == null && scaleH == null) {
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scaleW = 1F
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scaleH = 1F
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}else if (scaleW == null) {
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scaleW = scaleH
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} else {
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scaleH = scaleW
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}
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val matrix = Matrix()
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matrix.postScale(scaleW!!, scaleH!!)
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return Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)
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}
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/**
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* 文本换行
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*/
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private fun linefeed(textIndent: String, textMaxWidth: Float, paint: Paint): Array<String> {
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var textArray = arrayOf<String>()
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val str = StringBuilder()
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for (i in textIndent.indices) {
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str.append(textIndent[i])
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//measureText 在计算文本宽度时，会包含空格
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val width = paint.measureText(str.toString())
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//getTextBounds 在计算宽度时，会忽略掉空格
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// textPaint.getTextBounds(str.toString(), 0, str.length, bounds)
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if (width > textMaxWidth) {
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val lastChar = str.last()
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val chars = str.deleteCharAt(str.lastIndex)
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textArray = textArray.plus(chars.toString())
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str.clear()
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str.append(lastChar)
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}
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}
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if (str.isNotEmpty()) {
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textArray = textArray.plus(str.toString())
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}
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return textArray
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}
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}
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