[英]Android: Padding specified in styles.xml not showing in programmatically added TextView?
根據styles.xml
中的配置,我正在以編程方式將TextView
添加到我的應用程序 UI 並使其具有小填充。 但是,當我運行我的應用程序時, TextView
沒有填充:
這看起來很奇怪,考慮到我相信我已經在我的styles.xml
配置中定義了填充,並在我的MainActivity.java
配置中正確地設置了它。 下面是我的代碼:
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>
activity_main.xml :
<?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>
MainActivity.kt :
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)
}
}
setTextAppearance()
on 支持設置一些屬性,而填充不是其中之一。 請參閱https://developer.android.com/reference/android/R.styleable#TextAppearance
要以編程方式應用樣式,您可以使用ContextThemeWrapper
包裝Context
。 另請注意,您應該使用活動上下文而不是那里的應用程序上下文。 或者您可以僅以編程方式設置填充。
試試下面的代碼,
val notDoneScrapingMsg = TextView(applicationContext)
notDoneScrapingMsg.setTextAppearance(R.style.NotDoneScrapingMsg)
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