java - add() 在android androidx.fragment.app.FragmentTransaction 中定义

Question

无法调用某些 FragmentTransaction 方法。
例如，我想将 BlankFragment 添加到 FragmentContainerView 会导致以下错误。

  supportFragmentManager.commit {
       setReorderingAllowed(true)
       add<BlankFragment>(mainBinding.fragmentContainer)
  }

None of the following functions can be called with the argumentssupplied.

这是我的 build.gradle

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'androidx.appcompat:appcompat:1.3.1'
implementation 'androidx.core:core-ktx:1.6.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
testImplementation 'junit:junit:4.13.1'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'


implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'androidx.cardview:cardview:1.0.0'

// Glide
implementation 'com.github.bumptech.glide:glide:4.12.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.12.0'

// Fragment
def fragment_version = "1.3.6"
implementation "androidx.fragment:fragment-ktx:$fragment_version"

}
提前致谢。

Answer 1

reified add overload是 Kotlin 扩展方法(FragmentTransaction 本身是用 Java 编写的，因此它本身不支持该语法)，这意味着您需要导入 Kotlin 扩展:

import androidx.fragment.app.add