Android SpannableStringBuilder 用法

SpannableStringBuilder，和String一樣都是一種字串型別。不同的是SpannableString可以通過使用其方法setSpan方法實現字串各種文字的樣式。例如:段落文字、底線、文字放大、背景顏色、文字顏色、圖片塞入文字、刪除線、毛玻璃、段落圓點、粗體斜體、超連結、行數高度

文章目錄

段落文字
底線放大
背景顏色文字顏色
點擊圖標
段落圖刪除線
段落圓點修飾
粗體斜體
超連結行數高度
畫面布局
程式範例
效果展示
Github

1.段落文字

val leadingMarginText = findViewById<TextView>(R.id.leadingMarginText)

val one = "1.此APP所發送之驗證碼,將在您索取3分鐘後失效。\n2.無法收到驗證碼嗎？\n"
val spannableStringBuilder = SpannableStringBuilder(one)
//計算要空多少格
val oneMeasure = leadingMarginText.paint.measureText("1.").toInt()
//設定段落的文字長度
spannableStringBuilder.setSpan(
    LeadingMarginSpan.Standard(0, oneMeasure),
    0,
    spannableStringBuilder.length,
    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
)

val two = "a.手機設定是否有阻攔廣告訊息\nb.訊息容量已滿、訊號是否正常\nc.若以上皆正常仍無法收到簡訊請先與您的電信公司確認，以免重複發送多次簡訊驗 證碼導致帳號無法使用。"
spannableStringBuilder.append(two)
//計算要空多少格
val twoMeasure = leadingMarginText.paint.measureText("1.a.").toInt()
//設定段落的文字長度
spannableStringBuilder.setSpan(
    LeadingMarginSpan.Standard(
        oneMeasure,
        twoMeasure
    ), one.length, spannableStringBuilder.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
)

leadingMarginText.text = spannableStringBuilder

2.底線放大

val underlineSizeText = findViewById<TextView>(R.id.underlineSizeText)
val spannableStringBuilder = SpannableStringBuilder("文字的下底線和放大和縮小範例")
//下底線
spannableStringBuilder.setSpan(UnderlineSpan(), 4,6, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
//放大
spannableStringBuilder.setSpan(RelativeSizeSpan(1.5f), 7,9, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
//縮小
spannableStringBuilder.setSpan(RelativeSizeSpan(0.5f), 10,12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

underlineSizeText.text = spannableStringBuilder

3.背景顏色文字顏色

val backgroundForegroundText = findViewById<TextView>(R.id.backgroundForegroundText)
val spannableStringBuilder = SpannableStringBuilder("文字的背景顏色和文字顏色範例")
//背景顏色
spannableStringBuilder.setSpan(BackgroundColorSpan(Color.RED), 3,7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
//文字顏色
spannableStringBuilder.setSpan(ForegroundColorSpan(Color.BLUE), 8,12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

backgroundForegroundText.text = spannableStringBuilder

4.點擊圖標

val clickImageText = findViewById<TextView>(R.id.clickImageText)
val spannableStringBuilder = SpannableStringBuilder("文字的部分點擊和圖標範例")
//背景顏色
spannableStringBuilder.setSpan(object : ClickableSpan() {
    override fun onClick(view: View) {
        Toast.makeText(this@MainActivity, "點擊了", Toast.LENGTH_SHORT).show()
    }
}, 3,7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
//文字顏色(改藍色比較像可點擊的樣子)
spannableStringBuilder.setSpan(ForegroundColorSpan(Color.BLUE), 3,7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
//圖標
val imageSpan = ImageSpan(this, R.drawable.apple)
spannableStringBuilder.setSpan(imageSpan, 8,10, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

//設定才能點
clickImageText.movementMethod = LinkMovementMethod.getInstance()
clickImageText.text = spannableStringBuilder

5.段落圖刪除線

val drawableStrikeThroughText = findViewById<TextView>(R.id.drawableStrikeThroughText)
val spannableStringBuilder = SpannableStringBuilder("文字的首圖和刪除線範例")
//首圖
val apple = ContextCompat.getDrawable(this, R.drawable.apple)!!
spannableStringBuilder.setSpan(DrawableMarginSpan(apple), 0,1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
//刪除線
spannableStringBuilder.setSpan(StrikethroughSpan(), 6,9, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

drawableStrikeThroughText.text = spannableStringBuilder

6.段落圓點修飾

val bulletMaskFilterText = findViewById<TextView>(R.id.bulletMaskFilterText)
val spannableStringBuilder = SpannableStringBuilder("文字的段落圓點和修飾模糊範例")
//段落圓點
val width = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 5f, resources.displayMetrics).toInt()
val bulletSpan = BulletSpan(width, Color.RED)
spannableStringBuilder.setSpan(bulletSpan, 0,1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
//修飾模糊
val blurMaskFilterSpan = MaskFilterSpan(BlurMaskFilter(resources.displayMetrics.density * 2, BlurMaskFilter.Blur.NORMAL))
spannableStringBuilder.setSpan(blurMaskFilterSpan, 8,12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

bulletMaskFilterText.text = spannableStringBuilder

7.粗體斜體

val boldItalicText = findViewById<TextView>(R.id.boldItalicText)
val spannableStringBuilder = SpannableStringBuilder("文字的粗體和斜體範例")
//粗體
spannableStringBuilder.setSpan(StyleSpan(Typeface.BOLD), 3,5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
//斜體
spannableStringBuilder.setSpan(StyleSpan(Typeface.ITALIC), 6,8, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
boldItalicText.text = spannableStringBuilder

8.超連結行數高度

val urlLineHeightText = findViewById<TextView>(R.id.urlLineHeightText)
val spannableStringBuilder = SpannableStringBuilder("文字的Google超連結和行數高度行數高度行數高度範例。")
//超連結
spannableStringBuilder.setSpan(URLSpan("https://www.google.com.tw/"), 3,12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
//文字顏色(改藍色比較像可點擊的樣子)
spannableStringBuilder.setSpan(ForegroundColorSpan(Color.BLUE), 3,12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
//行數高度
spannableStringBuilder.setSpan(LineHeightSpan.Standard(90), 0, 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)

//設定才能點
urlLineHeightText.movementMethod = LinkMovementMethod.getInstance()
urlLineHeightText.text = spannableStringBuilder

9.畫面布局

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/leadingMarginText"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="32dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="32dp"
        android:textColor="@color/black"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <View
        android:id="@+id/view"
        android:layout_width="wrap_content"
        android:layout_height="1dp"
        android:layout_marginTop="8dp"
        android:background="@color/black"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/leadingMarginText" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/underlineSizeText"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="32dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="32dp"
        android:textColor="@color/black"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/view" />

    <View
        android:id="@+id/view2"
        android:layout_width="wrap_content"
        android:layout_height="1dp"
        android:layout_marginTop="8dp"
        android:background="@color/black"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/underlineSizeText" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/backgroundForegroundText"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="32dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="32dp"
        android:textColor="@color/black"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/view2" />

    <View
        android:id="@+id/view3"
        android:layout_width="wrap_content"
        android:layout_height="1dp"
        android:layout_marginTop="8dp"
        android:background="@color/black"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/backgroundForegroundText" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/clickImageText"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="32dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="32dp"
        android:textColor="@color/black"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/view3" />

    <View
        android:id="@+id/view4"
        android:layout_width="wrap_content"
        android:layout_height="1dp"
        android:layout_marginTop="8dp"
        android:background="@color/black"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/clickImageText" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/drawableStrikeThroughText"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="32dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="32dp"
        android:textColor="@color/black"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/view4" />

    <View
        android:id="@+id/view5"
        android:layout_width="wrap_content"
        android:layout_height="1dp"
        android:layout_marginTop="8dp"
        android:background="@color/black"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/drawableStrikeThroughText" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/bulletMaskFilterText"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="32dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="32dp"
        android:textColor="@color/black"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/view5" />

    <View
        android:id="@+id/view6"
        android:layout_width="wrap_content"
        android:layout_height="1dp"
        android:layout_marginTop="8dp"
        android:background="@color/black"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/bulletMaskFilterText" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/boldItalicText"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="32dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="32dp"
        android:textColor="@color/black"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/view6" />

    <View
        android:id="@+id/view7"
        android:layout_width="wrap_content"
        android:layout_height="1dp"
        android:layout_marginTop="8dp"
        android:background="@color/black"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/boldItalicText" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/urlLineHeightText"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="32dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="32dp"
        android:textColor="@color/black"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/view7" />

</androidx.constraintlayout.widget.ConstraintLayout>

10.程式範例

package com.example.test

import android.annotation.SuppressLint
import android.graphics.*
import android.os.Bundle
import android.text.*
import android.text.method.LinkMovementMethod
import android.text.style.*
import android.util.TypedValue
import android.view.View
import android.widget.TextView
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.ContextCompat


class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        //段落文字
        leadingMargin()

        //底線放大
        underLineSize()

        //背景文字顏色
        backgroundForeground()

        //點擊圖標
        clickImageText()

        //段落圖刪除線
        drawableStrikeThrough()

        //段落圓點修飾
        bulletMaskFilter()

        //粗體斜體
        boldItalic()

        //超連結行數高度
        urlLineHeight()
    }

    @SuppressLint("NewApi")
    private fun urlLineHeight() {
        val urlLineHeightText = findViewById<TextView>(R.id.urlLineHeightText)
        val spannableStringBuilder = SpannableStringBuilder("文字的Google超連結和行數高度行數高度行數高度範例。")
        //超連結
        spannableStringBuilder.setSpan(URLSpan("https://www.google.com.tw/"), 3,12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        //文字顏色(改藍色比較像可點擊的樣子)
        spannableStringBuilder.setSpan(ForegroundColorSpan(Color.BLUE), 3,12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        //行數高度
        spannableStringBuilder.setSpan(LineHeightSpan.Standard(90), 0, 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)

        //設定才能點
        urlLineHeightText.movementMethod = LinkMovementMethod.getInstance()
        urlLineHeightText.text = spannableStringBuilder
    }

    private fun boldItalic() {
        val boldItalicText = findViewById<TextView>(R.id.boldItalicText)
        val spannableStringBuilder = SpannableStringBuilder("文字的粗體和斜體範例")
        //粗體
        spannableStringBuilder.setSpan(StyleSpan(Typeface.BOLD), 3,5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        //斜體
        spannableStringBuilder.setSpan(StyleSpan(Typeface.ITALIC), 6,8, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        boldItalicText.text = spannableStringBuilder
    }

    private fun bulletMaskFilter() {
        val bulletMaskFilterText = findViewById<TextView>(R.id.bulletMaskFilterText)
        val spannableStringBuilder = SpannableStringBuilder("文字的段落圓點和修飾模糊範例")
        //段落圓點
        val width = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 5f, resources.displayMetrics).toInt()
        val bulletSpan = BulletSpan(width, Color.RED)
        spannableStringBuilder.setSpan(bulletSpan, 0,1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        //修飾模糊
        val blurMaskFilterSpan = MaskFilterSpan(BlurMaskFilter(resources.displayMetrics.density * 2, BlurMaskFilter.Blur.NORMAL))
        spannableStringBuilder.setSpan(blurMaskFilterSpan, 8,12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

        bulletMaskFilterText.text = spannableStringBuilder
    }

    private fun drawableStrikeThrough() {
        val drawableStrikeThroughText = findViewById<TextView>(R.id.drawableStrikeThroughText)
        val spannableStringBuilder = SpannableStringBuilder("文字的首圖和刪除線範例")
        //首圖
        val apple = ContextCompat.getDrawable(this, R.drawable.apple)!!
        spannableStringBuilder.setSpan(DrawableMarginSpan(apple), 0,1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        //刪除線
        spannableStringBuilder.setSpan(StrikethroughSpan(), 6,9, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

        drawableStrikeThroughText.text = spannableStringBuilder
    }

    private fun clickImageText() {
        val clickImageText = findViewById<TextView>(R.id.clickImageText)
        val spannableStringBuilder = SpannableStringBuilder("文字的部分點擊和圖標範例")
        //背景顏色
        spannableStringBuilder.setSpan(object : ClickableSpan() {
            override fun onClick(view: View) {
                Toast.makeText(this@MainActivity, "點擊了", Toast.LENGTH_SHORT).show()
            }
        }, 3,7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        //文字顏色(改藍色比較像可點擊的樣子)
        spannableStringBuilder.setSpan(ForegroundColorSpan(Color.BLUE), 3,7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        //圖標
        val imageSpan = ImageSpan(this, R.drawable.apple)
        spannableStringBuilder.setSpan(imageSpan, 8,10, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

        //設定才能點
        clickImageText.movementMethod = LinkMovementMethod.getInstance()
        clickImageText.text = spannableStringBuilder
    }

    private fun backgroundForeground() {
        val backgroundForegroundText = findViewById<TextView>(R.id.backgroundForegroundText)
        val spannableStringBuilder = SpannableStringBuilder("文字的背景顏色和文字顏色範例")
        //背景顏色
        spannableStringBuilder.setSpan(BackgroundColorSpan(Color.RED), 3,7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        //文字顏色
        spannableStringBuilder.setSpan(ForegroundColorSpan(Color.BLUE), 8,12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

        backgroundForegroundText.text = spannableStringBuilder
    }

    private fun underLineSize() {
        val underlineSizeText = findViewById<TextView>(R.id.underlineSizeText)
        val spannableStringBuilder = SpannableStringBuilder("文字的下底線和放大和縮小範例")
        //下底線
        spannableStringBuilder.setSpan(UnderlineSpan(), 4,6, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        //放大
        spannableStringBuilder.setSpan(RelativeSizeSpan(1.5f), 7,9, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        //縮小
        spannableStringBuilder.setSpan(RelativeSizeSpan(0.5f), 10,12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

        underlineSizeText.text = spannableStringBuilder
    }

    private fun leadingMargin() {
        val leadingMarginText = findViewById<TextView>(R.id.leadingMarginText)

        val one = "1.此APP所發送之驗證碼,將在您索取3分鐘後失效。\n2.無法收到驗證碼嗎？\n"
        val spannableStringBuilder = SpannableStringBuilder(one)
        //計算要空多少格
        val oneMeasure = leadingMarginText.paint.measureText("1.").toInt()
        //設定段落的文字長度
        spannableStringBuilder.setSpan(
            LeadingMarginSpan.Standard(0, oneMeasure),
            0,
            spannableStringBuilder.length,
            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
        )

        val two = "a.手機設定是否有阻攔廣告訊息\nb.訊息容量已滿、訊號是否正常\nc.若以上皆正常仍無法收到簡訊請先與您的電信公司確認，以免重複發送多次簡訊驗 證碼導致帳號無法使用。"
        spannableStringBuilder.append(two)
        //計算要空多少格
        val twoMeasure = leadingMarginText.paint.measureText("1.a.").toInt()
        //設定段落的文字長度
        spannableStringBuilder.setSpan(
            LeadingMarginSpan.Standard(
                oneMeasure,
                twoMeasure
            ), one.length, spannableStringBuilder.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
        )

        leadingMarginText.text = spannableStringBuilder
    }
}

11.效果展示

12.Github

Android SpannableStringBuilder 用法 Github

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Android Fly 程式筆記

Android SpannableStringBuilder 用法

Android SpannableStringBuilder 用法

文章目錄

1.段落文字

2.底線放大

3.背景顏色文字顏色

4.點擊圖標

5.段落圖刪除線

6.段落圓點修飾

7.粗體斜體

8.超連結行數高度

9.畫面布局

10.程式範例

11.效果展示

12.Github

發表迴響取消回覆

Android SpannableStringBuilder 用法

文章目錄

1.段落文字

2.底線放大

3.背景顏色文字顏色

4.點擊圖標

5.段落圖刪除線

6.段落圓點修飾

7.粗體斜體

8.超連結行數高度

9.畫面布局

10.程式範例

11.效果展示

12.Github

發表迴響 取消回覆

發表迴響取消回覆