我得到这条红色的线
<android.support.constraint.ConstraintLayout
和应用程序在打开时崩溃。它工作正常,但现在出现错误:无法解析类
android.support.constraint.constraintlayout
我还尝试将依赖项添加到模块 Gradle 文件中,并尝试通过 (add dependencies on androidx.constraints..,) 链接修复建议的修复程序,但仍然没有运气。我是新来的。请帮忙。这是主要 Activity 的所有代码:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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"
android:background="@drawable/background"
tools:context=".MainActivity">
<Button
android:id="@+id/act1Btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:text="Bill Calculation"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/askOptions"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:text="What you want to do?"
android:textColor="#00BCD4"
android:textSize="30sp"
app:layout_constraintBottom_toTopOf="@+id/act1Btn"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btn3"
android:layout_width="130dp"
android:layout_height="55dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:text="Tax Calc"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/act1Btn" />
<Button
android:id="@+id/btn4"
android:layout_width="142dp"
android:layout_height="46dp"
android:text="Mobile Tax"
app:layout_constraintBottom_toTopOf="@+id/btn3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/act1Btn" />
</android.support.constraint.ConstraintLayout>
最佳答案
maven.google.com
build.gradle (Project: Name)
中声明的存储库文件:repositories {
google()
}
build.gradle (Module: app)
中的依赖项文件:dependencies {
implementation "androidx.constraintlayout:constraintlayout:2.1.0"
}
ConstrainLayout
写:<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Your Content Here -->
</androidx.constraintlayout.widget.ConstraintLayout>
关于android - 无法解析类 android.support.constraint.ConstraintLayout,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/64342158/