相关疑难解决方法(0)

我试图用新的Android P FloatingActionButton这部分com.google.android.material.floatingactionbutton.FloatingActionButton和我得到这样的警告:

VisibilityAwareImageButton.setVisibility只能从同一个库组中调用(groupId = com.google.android.material)

import com.google.android.material.floatingactionbutton.FloatingActionButton
import android.view.View

class MainActivity : AppCompatActivity() {

    lateinit var demoFab: FloatingActionButton

    override fun onCreate(savedInstanceState: Bundle?) {
        demoFab = findViewById(R.id.demoFab)
        demoFab.visibility = View.VISIBLE  // the warning is here
    }
}

我尝试过搜索,唯一的搜索结果是关于响应UI可见性更改:

https://developer.android.com/training/system-ui/visibility

我试着探索如何VISIBLE在该com.google.android.material包中找到一个int值,并且我找到的唯一一个是com.google.android.material.floatingactionbutton.FloatingActionButton.VISIBLE,但警告仍然存在.

顶级build.gradle

buildscript {
    ext.kotlin_version = '1.2.41'
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.0-alpha14'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "com.google.gms:oss-licenses:0.9.2"
        // NOTE: Do not place your application dependencies here; they belong
        // in …