【发布时间】:2020-09-08 17:52:17
【问题描述】:
我正在尝试从非 Activity 类访问可绘制资源,这是因为我想将我的可组合函数放在另一个文件中,而不是将它放在主文件中,问题是我可以从主文件中访问 R.drawable.header ,但不能从另一个装箱文件中访问
import androidx.annotation.DrawableRes
import androidx.compose.foundation.Image
import androidx.compose.foundation.Text
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.lazy.LazyColumnFor
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.Surface
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.res.imageResource
import androidx.compose.ui.unit.dp
import androidx.ui.tooling.preview.Preview
import com.example.jetexample.ui.typography
@Composable
fun RecipeCard(recipe: Recipe){
val image = imageResource(R.drawable.header)
Surface(shape = RoundedCornerShape(8.dp),elevation = 8.dp,modifier = Modifier.padding(8.dp)) {
Column(modifier = Modifier.padding(16.dp)) {
val imageModifier = Modifier.preferredHeight(150.dp).fillMaxWidth().clip(shape = RoundedCornerShape(8.dp))
Image(asset = image,modifier = imageModifier,contentScale = ContentScale.Crop)
Spacer(modifier = Modifier.preferredHeight(16.dp))
Text(text = recipe.title,style = typography.h6)
for(ingredient in recipe.ingredients){
Text(text = ingredient,style = typography.body2)
}
}
}
}
我知道它与上下文有关,这就是为什么我无法访问我认为的资源,但我尝试使用 ContextAmbient 仍然无法
【问题讨论】:
标签: android kotlin android-recyclerview android-jetpack-compose