1，新增支持渐变色字体

FlyJingFish · FlyJingFish · commit 9ea08ff07283 · 2023-05-11T13:50:18.000+08:00
diff --git a/FormatTextView/src/main/java/com/flyjingfish/formattextview/FormatText.kt b/FormatTextView/src/main/java/com/flyjingfish/formattextview/FormatText.kt
@@ -51,6 +51,9 @@ class FormatText : BaseFormat() {
     @JvmField
     var ignorePaintShader = true
 
+    @JvmField
+    var gradient: Gradient? = null
+
 
     fun setTextColor(@ColorRes color: Int): FormatText {
         this.textColor = color
@@ -128,4 +131,9 @@ class FormatText : BaseFormat() {
         return this
     }
 
+    fun setIgnorePaintShader(gradient: Gradient): FormatText {
+        this.gradient = gradient
+        return this
+    }
+
 }
diff --git a/FormatTextView/src/main/java/com/flyjingfish/formattextview/FormatTextView.kt b/FormatTextView/src/main/java/com/flyjingfish/formattextview/FormatTextView.kt
@@ -1,7 +1,14 @@
 package com.flyjingfish.formattextview
 
 import android.content.Context
-import android.graphics.*
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.LinearGradient
+import android.graphics.Paint
+import android.graphics.Rect
+import android.graphics.RectF
+import android.graphics.Shader
+import android.graphics.Typeface
 import android.graphics.drawable.Drawable
 import android.graphics.drawable.InsetDrawable
 import android.graphics.drawable.LevelListDrawable
@@ -16,7 +23,7 @@ import android.util.LayoutDirection
 import android.view.View
 import androidx.annotation.StringRes
 import androidx.core.text.TextUtilsCompat
-import java.util.*
+import java.util.Locale
 
 
 class FormatTextView : BaseTextView {
@@ -25,8 +32,13 @@ class FormatTextView : BaseTextView {
     private var onInflateImageListener: OnInflateImageListener? = null
     private var isClickSpanItem = false
     var isSetOnClick = false
+    private var isDrawGradient = false
     private val underLineTexts: ArrayList<LineText> = ArrayList()
     private val deleteLineTexts: ArrayList<LineText> = ArrayList()
+    private val gradientTexts: ArrayList<LineText> = ArrayList()
+    private val gradientDrawTexts: ArrayList<GradientText> = ArrayList()
+    private var formatArgs: Array<out BaseFormat?>? = null
+    private var richText: String ?= null
 
     constructor(context: Context) : super(context)
     constructor(context: Context, attrs: AttributeSet?) : super(context, attrs)
@@ -45,6 +57,7 @@ class FormatTextView : BaseTextView {
         textValue = textValue.replace("\\n".toRegex(), "<br>")
         textValue = textValue.replace("\\r".toRegex(), "<br>")
         val strings = arrayOfNulls<String>(args.size)
+        var isContainGradient = false
         for (i in args.indices) { //%1$s
             val start = "<a href=\"$i\">"
             val end = "</a>"
@@ -64,17 +77,29 @@ class FormatTextView : BaseTextView {
                 value1 = value1?.replace("\\n".toRegex(), "<br>")
                 value1 = value1?.replace("\\r".toRegex(), "<br>")
                 strings[i] = start + value1 + end
+                if (formatText.gradient != null){
+                    isContainGradient = true
+                }
             }
 
 
         }
         val richText = String.format(textValue, *strings)
-
+        formatArgs = args
+        this.richText = richText
+        isDrawGradient = !isContainGradient
+        underLineTexts.clear()
+        deleteLineTexts.clear()
+        gradientTexts.clear()
+        gradientDrawTexts.clear()
         text = getCustomStyleHtml(richText, *args)
         highlightColor = Color.TRANSPARENT
         autoLinkMask = Linkify.WEB_URLS
     }
 
+    private fun resetText(){
+        text = richText?.let { formatArgs?.let { it1 -> getCustomStyleHtml(it, *it1) } }
+    }
 
     fun setFormatText(@StringRes formatTextRes: Int, vararg args: Int) {
         setFormatText(resources.getString(formatTextRes), *args)
@@ -299,11 +324,83 @@ class FormatTextView : BaseTextView {
             userDefaultDelete = false
 
         }
+        //gradient
+        if (!isDrawGradient && formatText.gradient != null) {
+            val textPaint = TextPaint()
+            textPaint.textSize = if (textSize > 0) sp2px(context, textSize) else getTextSize()
+            val fm = textPaint.fontMetrics
+
+            val gradientText = LineText(
+                start,
+                end,
+                0,
+                (fm.descent - fm.ascent) / 2 - fm.descent,
+                0f
+            )
+            gradientTexts.add(gradientText)
+
+        }
+
+        if (isDrawGradient && gradientDrawTexts.size > 0){
+            for (gradientDrawText in gradientDrawTexts) {
+                if (gradientDrawText.start>=start && gradientDrawText.end <= end){
+
+                    val clickableSpan: GradientSpan = object : GradientSpan() {
+                        override fun updateDrawState(ds: TextPaint) {
+                            super.updateDrawState(ds)
+                            var left=0f
+                            var top=0f
+                            var right=0f
+                            var bottom=0f
+                            var orientation = formatText.gradient?.orientation
+                            if (orientation == null){
+                                orientation = Gradient.Orientation.LEFT_TO_RIGHT
+                            }
+                            when (orientation) {
+                                Gradient.Orientation.LEFT_TO_RIGHT -> {
+                                    left = gradientDrawText.rectF.left
+                                    top = gradientDrawText.rectF.top
+                                    right = gradientDrawText.rectF.right
+                                    bottom = gradientDrawText.rectF.top
+                                }
+                                Gradient.Orientation.TOP_TO_BOTTOM -> {
+                                    left = gradientDrawText.rectF.left
+                                    top = gradientDrawText.rectF.top
+                                    right = gradientDrawText.rectF.left
+                                    bottom = gradientDrawText.rectF.bottom
+                                }
+                                Gradient.Orientation.LEFT_TOP_TO_RIGHT_BOTTOM -> {
+                                    left = gradientDrawText.rectF.left
+                                    top = gradientDrawText.rectF.top
+                                    right = gradientDrawText.rectF.right
+                                    bottom = gradientDrawText.rectF.bottom
+                                }
+                                Gradient.Orientation.LEFT_BOTTOM_TO_RIGHT_TOP -> {
+                                    left = gradientDrawText.rectF.left
+                                    top = gradientDrawText.rectF.bottom
+                                    right = gradientDrawText.rectF.right
+                                    bottom = gradientDrawText.rectF.top
+                                }
+                            }
+                            val mLinearGradient = formatText.gradient?.gradientColors?.let {
+                                LinearGradient(
+                                    left, top, right, bottom,
+                                    it, formatText.gradient?.gradientPositions,
+                                    Shader.TileMode.CLAMP
+                                )
+                            }
+                            ds.shader = mLinearGradient
+                        }
+                    }
+                    htmlBuilder.setSpan(clickableSpan, gradientDrawText.start, gradientDrawText.end, flags)
+                }
+            }
+        }
 
         val clickableSpan: ClickableSpan = object : FormatClickableSpan(urlSpan) {
             override fun updateDrawState(ds: TextPaint) {
                 super.updateDrawState(ds)
-                if(formatText.ignorePaintShader){
+                if(formatText.ignorePaintShader && formatText.gradient == null){
                     ds.shader = null
                 }
                 //设置颜色
@@ -361,6 +458,13 @@ class FormatTextView : BaseTextView {
         }
     }
 
+    abstract class GradientSpan : CharacterStyle(), UpdateAppearance {
+        override fun updateDrawState(ds: TextPaint) {
+            ds.color = ds.linkColor
+            ds.isUnderlineText = false
+        }
+    }
+
     override fun setOnClickListener(l: OnClickListener?) {
 //        为了处理ClickableSpan和View.OnClickListener点击事件冲突
         super.setOnClickListener {
@@ -382,8 +486,46 @@ class FormatTextView : BaseTextView {
         super.onDraw(canvas)
         drawUnderline(canvas)
         drawDeleteLine(canvas)
+        getGradient()
     }
+    private fun getGradient() {
+        if (gradientTexts.size == 0 || isDrawGradient) {
+            return
+        }
+        //绘制下划线
+        for (lineText in gradientTexts) {
+            val map = HashMap<Int,GradientText>()
+            for (i in lineText.start until lineText.end) {
+                val line = layout.getLineForOffset(i)
+                val bound = getUnderLineBound(i)
+                val left = bound.left.toFloat()
+                val top = bound.bottom.toFloat() - lineText.lineTop*2
+                val right = bound.right.toFloat()
+                val bottom = bound.bottom.toFloat()
+                val rect = RectF(left,top,right, bottom)
+                if (!map.containsKey(line)){
+                    val gradientText = GradientText(rect,i,i+1)
+                    map[line] = gradientText
+                }else{
+                    val gradientText = map[line]
+                    val oldRect = gradientText!!.rectF
+                    if (oldRect.left < rect.left){
+                        oldRect.right = right
+                    }else{
+                        oldRect.left = left
+                    }
+                    gradientText.end = i+1
+                }
+            }
 
+            for ((_,value) in map){
+                gradientDrawTexts.add(value)
+            }
+
+        }
+        isDrawGradient = true
+        resetText()
+    }
     private fun drawUnderline(canvas: Canvas?) {
         if (underLineTexts.size == 0) {
             return
@@ -476,6 +618,12 @@ class FormatTextView : BaseTextView {
         var lineWidth: Float
     )
 
+    private class GradientText(
+        var rectF: RectF,
+        var start: Int,
+        var end: Int,
+    )
+
     override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
         super.onMeasure(widthMeasureSpec, heightMeasureSpec)
         if (underLineTexts.size > 0) {
diff --git a/FormatTextView/src/main/java/com/flyjingfish/formattextview/Gradient.kt b/FormatTextView/src/main/java/com/flyjingfish/formattextview/Gradient.kt
@@ -0,0 +1,14 @@
+package com.flyjingfish.formattextview
+
+class Gradient(
+    var gradientColors: IntArray,
+    var gradientPositions: FloatArray?,
+    var orientation: Orientation?
+) {
+    enum class Orientation{
+        LEFT_TO_RIGHT,
+        TOP_TO_BOTTOM,
+        LEFT_TOP_TO_RIGHT_BOTTOM,
+        LEFT_BOTTOM_TO_RIGHT_TOP
+    }
+}
diff --git a/README-zh.md b/README-zh.md
@@ -51,7 +51,7 @@
 
 ```gradle
     dependencies {
-        implementation 'com.github.FlyJingFish:FormatTextViewLib:2.2.3'
+        implementation 'com.github.FlyJingFish:FormatTextViewLib:2.2.4'
     }
 ```
 ## 第三步，使用说明
@@ -204,22 +204,24 @@ textView.setFormatTextBean("%1$s欢迎欢迎欢迎欢迎欢迎欢迎欢迎%3$s
 ALIGN_CENTER 为当前库新增对齐方式旨解决在小图标和文本中心对齐问题，在图片设置超过行高时将会出现裁剪问题，如果您图片很大还是建议使用ALIGN_BASELINE
 
 ## FormatText 参数一览
-| 属性                 |      参数类型      |      描述       |
-|--------------------|:--------------:|:-------------:|
-| textColor          | @ColorRes int  |   文字资源颜色Id    |
-| bold               |    boolean     |    文字是否加粗     |
-| italic             |    boolean     |    文字是否斜体     |
-| strValue           |     String     |  文字String类型值  |
-| resValue           | @StringRes int |   文字文本资源Id    |
-| textSize           |     float      | 文字字体大小(单位：SP) |
-| underline          |    boolean     |    文字是否下划线    |
-| underlineColor     | @ColorRes int  |    文字下划线颜色    |
-| underlineWidth     |     float      |    文字下划线线宽    |
-| underlineMarginTop |     float      | 文字下划线向下偏移的距离  |
-| deleteLine         |    boolean     |    文字是否删除线    |
-| deleteLineColor    | @ColorRes int  |    文字删除线颜色    |
-| deleteLineWidth    |     float      |    文字删除线线宽    |
-| backgroundColor    | @ColorRes int  |    文字区域背景色    |
+| 属性                 |      参数类型      |          描述           |
+|--------------------|:--------------:|:---------------------:|
+| textColor          | @ColorRes int  |       文字资源颜色Id        |
+| bold               |    boolean     |        文字是否加粗         |
+| italic             |    boolean     |        文字是否斜体         |
+| strValue           |     String     |      文字String类型值      |
+| resValue           | @StringRes int |       文字文本资源Id        |
+| textSize           |     float      |     文字字体大小(单位：SP)     |
+| underline          |    boolean     |        文字是否下划线        |
+| underlineColor     | @ColorRes int  |        文字下划线颜色        |
+| underlineWidth     |     float      |        文字下划线线宽        |
+| underlineMarginTop |     float      |     文字下划线向下偏移的距离      |
+| deleteLine         |    boolean     |        文字是否删除线        |
+| deleteLineColor    | @ColorRes int  |        文字删除线颜色        |
+| deleteLineWidth    |     float      |        文字删除线线宽        |
+| backgroundColor    | @ColorRes int  |        文字区域背景色        |
+| ignorePaintShader  |    boolean     | 文字是否忽略TextView的Shader |
+| gradient           |    Gradient    |        文字渐变色配置        |
 
 ## FormatImage 参数一览
 | 属性                |       参数类型       |                        描述                        |
diff --git a/README.md b/README.md
@@ -53,7 +53,7 @@
 
 ```gradle
      dependencies {
-         implementation 'com.github.FlyJingFish:FormatTextViewLib:2.2.3'
+         implementation 'com.github.FlyJingFish:FormatTextViewLib:2.2.4'
      }
 ````
 ## The third step, instructions for use
@@ -222,6 +222,8 @@ ALIGN_CENTER adds an alignment method to the current library to solve the alignm
 | deleteLineColor    | @ColorRes int  |                Text strikethrough color                 |
 | deleteLineWidth    |     float      |              Text strikethrough line width              |
 | backgroundColor    | @ColorRes int  |               Text area background color                |
+| ignorePaintShader  |    boolean     |   Whether the text ignores the Shader of the TextView   |
+| gradient           |    Gradient    |            Text Gradient Color Configuration            |
 
 ## FormatImage parameter list
 | property          |  parameter type  |                        description                         |
diff --git a/app/src/main/java/com/flyjingfish/formattextviewdemo/DemoActivity.kt b/app/src/main/java/com/flyjingfish/formattextviewdemo/DemoActivity.kt
@@ -1,5 +1,6 @@
 package com.flyjingfish.formattextviewdemo
 
+import android.graphics.Color
 import android.graphics.LinearGradient
 import android.graphics.Shader
 import android.graphics.drawable.Drawable
@@ -30,6 +31,7 @@ class DemoActivity : AppCompatActivity() {
                 underlineMarginTop = 6f
                 underlineWidth = 2f
                 resValue = R.string.User_Agreement
+                gradient = Gradient(intArrayOf(Color.GREEN,Color.RED),null,Gradient.Orientation.LEFT_TO_RIGHT)
             },
             FormatText().apply {
                 textSize = 22f
@@ -41,6 +43,7 @@ class DemoActivity : AppCompatActivity() {
                 underlineMarginTop = 6f
                 underlineWidth = 2f
                 resValue = R.string.Privacy_Policy
+                gradient = Gradient(intArrayOf(Color.BLUE,Color.RED),null,Gradient.Orientation.LEFT_BOTTOM_TO_RIGHT_TOP)
             }
         )
         text1.setOnFormatClickListener(object :OnFormatClickListener{
@@ -104,6 +107,7 @@ class DemoActivity : AppCompatActivity() {
                 underlineMarginTop = 10f
                 underlineWidth = 3f
                 ignorePaintShader = false
+                gradient = Gradient(intArrayOf(Color.BLUE,Color.RED),null,Gradient.Orientation.LEFT_BOTTOM_TO_RIGHT_TOP)
             },
             FormatText().apply {
                 textSize = 30f
diff --git a/app/src/main/res/layout/activity_demo.xml b/app/src/main/res/layout/activity_demo.xml
@@ -16,7 +16,7 @@
         android:text="Hello World!" />
 
 
-    <com.flyjingfish.formattextview.FormatTextView
+    <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:textSize="18sp"
