Kotlin语言实现单击任意TextVIew切换一个新页面，并且实现颜色变换

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent">

    
    <RadioGroup
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    >
    <RadioButton
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:button="@null"
        android:textColor="@color/color"
        android:checked="true"
        android:layout_marginHorizontal="20dp"
        android:layout_height="wrap_content"
        android:text="First TextView"
        android:clickable="true" />

    <RadioButton
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_marginHorizontal="20dp"
        android:button="@null"
        android:layout_height="wrap_content"
        android:text="Second TextView"
        android:textColor="@color/color"
        android:clickable="true"
        android:layout_below="@id/textView1" />

    
RadioGroup>


    <FrameLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/textView2" />

LinearLayout>
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创建一个新包 color

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="@color/purple_700" android:state_checked="true"/>
    <item android:color="@color/black" android:state_checked="false"/>
selector>
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功能页

class MainActivity2 : AppCompatActivity() {
    private lateinit var fragmentManager: FragmentManager
    private val binding by lazy {
        ActivityMain2Binding.inflate(layoutInflater)
    }
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(binding.root)
        fragmentManager = supportFragmentManager

        binding.textView1.setOnClickListener {
            replaceFragment(HomeFragment())
        }

        binding.textView2.setOnClickListener {
            replaceFragment(SecondFragment())
        }
    }
    private fun replaceFragment(fragment: Fragment) {
        val transaction: FragmentTransaction = fragmentManager.beginTransaction()
        transaction.replace(R.id.container, fragment)
        transaction.addToBackStack(null)
        transaction.commit()
    }
}
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