Java Android:styles.xml中指定的填充是否未显示在以编程方式添加的TextView中？

根据

styles.xml

中的配置，我正在以编程方式将

TextView

添加到我的应用程序的UI中，并使其具有较小的填充。但是，当我运行我的应用程序时，

TextView

没有填充：

这似乎很奇怪，因为我相信我已经在

style.xml

配置中定义了填充，并在

MainActivity.java

中以编程方式正确设置了填充。下面是我的代码：

styles.xml：

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <!-- Message alerting the user that the app has not finished scraping the schedule -->
    <style name="NotDoneScrapingMsg" parent="@android:style/Widget.TextView">
        <item name="android:textSize">16sp</item>
        <item name="android:textColor">#000000</item>
        <item name="android:paddingLeft">7dp</item>
    </style>
</resources>

<?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">

    <LinearLayout
        android:id="@+id/baseLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.addtextviewwithpadding

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.LinearLayout
import android.widget.TextView
import androidx.core.widget.TextViewCompat

class MainActivity : AppCompatActivity() {

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

        val baseLayout: LinearLayout = findViewById<LinearLayout>(R.id.baseLayout)

        // Create and add a TextView telling the user that the app is still retrieving the schedule
        val notDoneScrapingMsg = TextView(applicationContext)
        notDoneScrapingMsg.text = "Test Padding"
        //valueTV.id = 5
        notDoneScrapingMsg.layoutParams = LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.MATCH_PARENT,
            LinearLayout.LayoutParams.WRAP_CONTENT
        )
        TextViewCompat.setTextAppearance(notDoneScrapingMsg, R.style.NotDoneScrapingMsg)

        baseLayout.addView(notDoneScrapingMsg)
    }
}

@颜色/原色
@颜色/原色暗
@颜色/颜色重音
16便士
#000000
7dp

活动\u main.xml：

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <!-- Message alerting the user that the app has not finished scraping the schedule -->
    <style name="NotDoneScrapingMsg" parent="@android:style/Widget.TextView">
        <item name="android:textSize">16sp</item>
        <item name="android:textColor">#000000</item>
        <item name="android:paddingLeft">7dp</item>
    </style>
</resources>

<?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">

    <LinearLayout
        android:id="@+id/baseLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.addtextviewwithpadding

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.LinearLayout
import android.widget.TextView
import androidx.core.widget.TextViewCompat

class MainActivity : AppCompatActivity() {

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

        val baseLayout: LinearLayout = findViewById<LinearLayout>(R.id.baseLayout)

        // Create and add a TextView telling the user that the app is still retrieving the schedule
        val notDoneScrapingMsg = TextView(applicationContext)
        notDoneScrapingMsg.text = "Test Padding"
        //valueTV.id = 5
        notDoneScrapingMsg.layoutParams = LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.MATCH_PARENT,
            LinearLayout.LayoutParams.WRAP_CONTENT
        )
        TextViewCompat.setTextAppearance(notDoneScrapingMsg, R.style.NotDoneScrapingMsg)

        baseLayout.addView(notDoneScrapingMsg)
    }
}

MainActivity.kt：

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <!-- Message alerting the user that the app has not finished scraping the schedule -->
    <style name="NotDoneScrapingMsg" parent="@android:style/Widget.TextView">
        <item name="android:textSize">16sp</item>
        <item name="android:textColor">#000000</item>
        <item name="android:paddingLeft">7dp</item>
    </style>
</resources>

<?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">

    <LinearLayout
        android:id="@+id/baseLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.addtextviewwithpadding

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.LinearLayout
import android.widget.TextView
import androidx.core.widget.TextViewCompat

class MainActivity : AppCompatActivity() {

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

        val baseLayout: LinearLayout = findViewById<LinearLayout>(R.id.baseLayout)

        // Create and add a TextView telling the user that the app is still retrieving the schedule
        val notDoneScrapingMsg = TextView(applicationContext)
        notDoneScrapingMsg.text = "Test Padding"
        //valueTV.id = 5
        notDoneScrapingMsg.layoutParams = LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.MATCH_PARENT,
            LinearLayout.LayoutParams.WRAP_CONTENT
        )
        TextViewCompat.setTextAppearance(notDoneScrapingMsg, R.style.NotDoneScrapingMsg)

        baseLayout.addView(notDoneScrapingMsg)
    }
}

package com.example.addtextviewwithpadding
导入androidx.appcompat.app.appcompat活动
导入android.os.Bundle
导入android.widget.LinearLayout
导入android.widget.TextView
导入androidx.core.widget.TextViewCompat
类MainActivity:AppCompatActivity（）{
重写创建时的乐趣（savedInstanceState:Bundle？）{
super.onCreate（savedInstanceState）
setContentView（R.layout.activity_main）
val baseLayout:LinearLayout=findViewById（R.id.baseLayout）
//创建并添加一个TextView，告知用户应用程序仍在检索计划
val notDoneScrapingMsg=TextView（applicationContext）
notDoneScrapingMsg.text=“测试填充”
//valueTV.id=5
NotDoneStrapingMsg.layoutParams=LinearLayout.layoutParams(
LinearLayout.LayoutParams.MATCH_父级，
LinearLayout.LayoutParams.WRAP_内容
)
TextViewCompat.setTextAppearance（NotDoneStrapingMsg，R.style.NotDoneStrapingMsg）
baseLayout.addView（notDoneScrapingMsg）
}
}

尝试以下代码

        val notDoneScrapingMsg = TextView(applicationContext)
        notDoneScrapingMsg.setTextAppearance(R.style.NotDoneScrapingMsg)

on上的

settextearance（）

支持设置一些属性，填充不是其中之一。看

---

要以编程方式应用样式，可以使用

ContextThemeWrapper

包装

上下文。还要注意，您应该使用活动上下文，而不是应用程序上下文。或者您可以通过编程方式设置填充。
不幸的是，这不起作用。