Jetpack Compose中Modifier.fillMaxSize未解析引用错误求助

报错信息 #

e: learn/app/src/main/java/com/learn/MainActivity.kt: (41, 32): Unresolved reference: fillMaxSize

相关代码 #

MainActivity.kt #

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            MaterialTheme{
                loginUI()
            }
        }
    }
}

@Composable
fun Greeting(){
    val image: Painter = painterResource(id = R.drawable.ic_launcher_background)
    Image(painter = image,contentDescription = "")
    Column(modifier = Modifier.fillMaxSize()){
        Text("Hello")
        Text("World")
    }
}

导入语句 #

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.material3.Text
import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.runtime.Composable
import androidx.compose.runtime.DisposableEffect
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.Modifier
import com.google.accompanist.systemuicontroller.rememberSystemUiController
import androidx.compose.foundation.layout.Column
import androidx.compose.material.MaterialTheme
import androidx.compose.foundation.Image
import androidx.compose.ui.graphics.painter.Painter
import androidx.compose.ui.res.painterResource

项目依赖配置 #

implementation 'androidx.core:core-ktx:1.9.0'
implementation "androidx.compose.ui:ui:1.3.0-rc01"
implementation "androidx.compose.material:material:1.3.0-rc01"
implementation "androidx.compose.material3:material3:1.0.0-rc01"
implementation "androidx.compose.material3:material3-window-size-class:1.0.0-rc01"
implementation "androidx.compose.ui:ui-tooling-preview:1.3.0-rc01"
implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.4.1'
implementation 'androidx.activity:activity-compose:1.7.0-alpha01'
implementation "androidx.navigation:navigation-compose:2.5.2"
implementation "com.google.accompanist:accompanist-systemuicontroller:0.26.5-rc"

//TESTS
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
androidTestImplementation "androidx.compose.ui:ui-test-junit4:1.2.1"
debugImplementation "androidx.compose.ui:ui-tooling:1.3.0-rc01"

解决方案 #

fillMaxSize() 是 androidx.compose.foundation.layout 包下的Modifier扩展函数，你的导入语句缺少该函数的引用，添加以下任意一种导入即可：

• 单独导入该函数：

import androidx.compose.foundation.layout.fillMaxSize

• 导入整个layout包的所有扩展函数：

import androidx.compose.foundation.layout.*

你的依赖配置已经包含了该函数所在的基础库（androidx.compose.material/material3依赖了foundation库），无需额外添加依赖。添加导入后同步项目即可解决错误。

内容的提问来源于stack exchange，提问作者Dave Co.