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TextSpan.kt
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TextSpan.kt
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/*
* Copyright 2023 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.platform.ui.text
import android.graphics.Color
import android.os.Bundle
import android.view.View
import androidx.core.text.backgroundColor
import androidx.core.text.bold
import androidx.core.text.buildSpannedString
import androidx.core.text.color
import androidx.fragment.app.Fragment
import com.example.platform.ui.text.databinding.TextSpanFragmentBinding
import com.google.android.catalog.framework.annotations.Sample
@Sample(
name = "TextSpan",
description = "buildSpannedString is useful for quickly building a rich text.",
documentation = "https://developer.android.com/kotlin/ktx#core",
tags = ["text"]
)
class TextSpanFragment : Fragment(R.layout.text_span_fragment) {
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
val binding = TextSpanFragmentBinding.bind(view)
// `buildSpannedString` in the 'core-ktx' library is useful for quickly building a rich
// text. The
// [androidx.core.text](https://developer.android.com/reference/kotlin/androidx/core/text/package-summary)
// package provides several DSL methods for applying text styles.
binding.message.text = buildSpannedString {
color(Color.RED) {
append("H")
}
append("ello, ")
bold {
color(Color.BLUE) {
append("W")
}
append("orld")
}
backgroundColor(Color.YELLOW) {
append("!")
}
}
}
}