I am trying to show an image with fill width and auto height using Jetpack Compose Coil. I want the image to take the full width and auto height. But the image only showing when I specify a fixed height.
Image(
painter = rememberImagePainter(
data = post.image
),
contentDescription = null,
contentScale = ContentScale.Crop,
modifier = Modifier.fillMaxWidth()
)
I tried with .fillMaxHeight() and .fillMaxSize() but it's not working. Is there any way I could achieve this?
This happens when one of view width/height is calculated as zero, which means it shouldn't be displayed and no need to download it. Check out more about the reasons in this issue on compose tracker.
You should make your size not being equal to zero. Depending you your layout it can be done with variations of width/height/aspect ratio modifiers.
If you'd like to get your image in original size, you can to add size(OriginalSize) to painter builder. This will force image to start loading. This parameter makes your view download and put into the memory full size of the image, without optimizing it for the current view. So use it carefully, only if you're sure the image won't be too big and you really can't add use size modifiers.
Image(
painter = rememberImagePainter(
data = post.image,
builder = {
size(OriginalSize)
},
),
contentDescription = null,
contentScale = ContentScale.Crop,
modifier = Modifier.fillMaxWidth()
)
With latest Coil 2.1.0 you can do like this:
val model = ImageRequest.Builder(LocalContext.current)
.data(imageUrl)
.size(Size.ORIGINAL)
.crossfade(true)
.build()
val painter = rememberAsyncImagePainter(model)
Image(
modifier = Modifier.fillMaxWidth(),
painter = painter,
contentDescription = null,
contentScale = ContentScale.FillWidth
)
If your image OriginalSize is to small for your composable you can also use scale(Scale.FIT) in your builder.
Your image will max fit your composable while keeping it's aspect ratio.
Image(
rememberImagePainter(
data = user?.photoUrl?:"",
builder = {
size(OriginalSize)
scale(Scale.FIT)
transformations(CircleCropTransformation())
}
),
contentDescription = "Picture",
contentScale = ContentScale.FillWidth
)
Instead of using size(OriginalSize) that impacts image optimization, you can set min height/width for image (for example 1.dp). This will force image to start loading:
Image(
painter = rememberImagePainter(url),
contentDescription = null,
modifier = Modifier
.fillMaxWidth()
.defaultMinSize(minHeight = 1.dp),
)
Related
I'm using coil library to load images in my composable view and I want to define fix height and width for my coil Image composable, however the modifier is missing in the coil Image composable class, following is the code snippet I'm using.
AsyncImage(
model = limit.imgUrl,
contentDescription = null
)
How I can make the width and height fixed irrespective of the image resolution.
Just apply modifier = Modifier.height(xx.dp).width(xx.dp) to the AsyncImage:
AsyncImage(
//...
modifier = Modifier.height(300.dp).width(100.dp)
)
Use the Modifier to set the width and height, but be sure to set contentScale = ContentScale.FillBounds, or it won't resize the image properly:
AsyncImage(
model = limit.imgUrl,
contentDescription = null,
contentScale = ContentScale.FillBounds,
modifier = Modifier.height(60.dp).width(80.dp)
)
I'm using Coil 1.3.2 in Jetpack Compose and I have an Image like this
Image(
painter = rememberImagePainter(
data = imageUrl,
onExecute = { _, _ -> true },
builder = {
placeholder(R.drawable.icon)
}
),
contentScale = ContentScale.FillWidth,
contentDescription = null,
modifier = Modifier
.fillMaxWidth()
.aspectRatio(1f)
)
How can I set a custom color and size for my placeholder icon ?
I didn't find any examples on the documentation
You can use painter.state to see if the image is still loading, and use Box to display the desired placeholder. Note that the Image to be loaded must be in the view hierarchy, just defining rememberImagePainter won't start loading.
You can use either Image or Icon for the placeholder: if you need to change tint color, the second option seems cleaner:
Box(contentAlignment = Alignment.Center) {
val painter = rememberImagePainter(data = imageUrl)
Image(
painter = painter,
contentScale = ContentScale.FillWidth,
contentDescription = null,
modifier = Modifier
.fillMaxWidth()
.aspectRatio(1f)
)
if (painter.state !is ImagePainter.State.Success) {
Icon(
painter = painterResource(id = R.drawable.icon),
contentDescription = null,
tint = Color.Blue,
modifier = Modifier.size(100.dp)
)
}
}
I'm using contentAlignment = Alignment.Center to center static size placeholder inside the Box, also you can add Modifier.matchParentSize() to the placeholder so it'll be the same size as the image, use fillMaxSize(part) to take part of parent space, etc.
Also you can use AnimatedVisibility instead of if to add an animation.
AFAIK you cannot do that using the resource directly, but you could use different placeholder overload taking the Drawable object. You could try and do what you need directly in that object
I would like to display an image with the following rules:
The image is remote and needs to load on runtime.
We don't know what the image size is until it's loaded.
The Image view should take the full width of the parent, and it should automatically adjust its height to match the remotely loaded image, so that no cropping/stretching occurs.
I tried using the Coil dependency and I have this code:
Image(
painter = rememberImagePainter(viewModel.fullImageUrl),
contentDescription = null,
contentScale = ContentScale.FillHeight,
modifier = Modifier
.fillMaxWidth()
.aspectRatio(3.21428f) // TODO: Figure out how to set height/ratio based on image itself
)
When I remove the Image's contentScale and modifier, its height always seems to be zero. I'm not sure what I should do to make Image fill the max width of its parent while determining its own size after Coil loads the image file.
As you set flexible width with fillMaxWidth, you need to use ContentScale.FillWidth for your contentScale:
Image(
painter = rememberImagePainter(
"https://via.placeholder.com/300.png",
),
contentDescription = null,
contentScale = ContentScale.FillWidth,
modifier = Modifier
.fillMaxWidth()
)
The following will work fine if your image has enough priority. But in some cases coil won't start loading because it's gonna think that image is zero size so no need to display it. For such case you can add size(OriginalSize) parameter to the builder:
rememberImagePainter(
"https://via.placeholder.com/300.png",
builder = {
size(OriginalSize)
}
)
This parameter makes your view download and put into the memory full size of the image, without optimizing it for the current view. So use it carefully, only if you're sure the image won't be too big and you really can't add use size modifiers.
If image is getting loaded but still not takes enough space, you can set aspect ratio like this:
val painter = rememberImagePainter("https://via.placeholder.com/300.png")
Image(
painter = painter,
contentDescription = null,
contentScale = ContentScale.Fit,
modifier = Modifier
.fillMaxWidth()
.then(
(painter.state as? ImagePainter.State.Success)
?.painter
?.intrinsicSize
?.let { intrinsicSize ->
Modifier.aspectRatio(intrinsicSize.width / intrinsicSize.height)
} ?: Modifier
)
)
If none of these helped and painter.state is not changing from Empty, try hardcode height ?: Modifier.height(10.dp) to let image start loading
Let's say I have a rectangular avatar image like the one below, how can I force it to be drawn as a circle in Jetpack Compose?
There's a clip modifier which can be applied to any composable as well as the Image, just pass a CircleShape into it:
Image(
painter = painterResource(R.drawable.sample_avatar),
contentDescription = "avatar",
contentScale = ContentScale.Crop, // crop the image if it's not a square
modifier = Modifier
.size(64.dp)
.clip(CircleShape) // clip to the circle shape
.border(2.dp, Color.Gray, CircleShape) // add a border (optional)
)
You can use any other shape to clip the image, for example CircleShape it's just RoundedCornerShape(percent = 50). Let's try RoundedCornerShape(percent = 10):
Also, you may try a
implementation "com.github.skydoves:landscapist-glide:1.3.6"
By using Modifier.clip(CircleShape)
GlideImage(
modifier = Modifier
.width(50.dp)
.height(50.dp)
.clip(CircleShape)
.clickable(enabled = true, onClick = onClick),
imageModel = "https://avatars.githubusercontent.com/u/27887884?v=4",
// Crop, Fit, Inside, FillHeight, FillWidth, None
contentScale = ContentScale.Crop,
// shows an image with a circular revealed animation.
circularReveal = CircularReveal(duration = 250),
// shows a placeholder ImageBitmap when loading.
placeHolder = ImageBitmap.imageResource(R.drawable.avater),
// shows an error ImageBitmap when the request failed.
error = ImageBitmap.imageResource(id = R.drawable.avater)
)
For more components visit LandScapist
For those who wonder how to make an image squared (or round) without explicitly setting its sizes, there is Modifier.aspectRatio(1f)
We can achieve this using the background field in a modifier.
Image(
painter = painterResource(id = R.drawable.ic_arrow_right),
contentDescription = "",
modifier = Modifier
.padding(4.dp, 4.dp).background(colorResource(id = R.color.greenColor), CircleShape)
.clip(CircleShape),
colorFilter = ColorFilter.tint(colorResource(id = R.color.white)),
contentScale = ContentScale.Crop,
)
I am trying to show a rectangle image with android compose in a circle shape but the edges don't stretch to fill the whole.
In other words I don't want the black background shown in the image below to appear and the flag to stretch to cover it even if I have to crop from the vertical edges
The code used to produce the image
Image(
imageVector = vectorResource(id = R.drawable.flag_cn),
modifier = Modifier.matchParentSize().clip(CircleShape)
.background(shape = CircleShape, color = Color.Black))
Update: I tried to set the content scale option in Image Compose to crop
Image(
imageVector = vectorResource(id = flagID),
modifier = Modifier
.fillMaxSize(0.4f)
.background(shape = CircleShape, color = Color.Black)
.align(Alignment.BottomEnd)
.clip(CircleShape),
contentScale = ContentScale.Crop
)
Maybe something like this?
val imageVector = vectorResource(id = R.drawable.flag_cn)
Surface(
modifier = Modifier.preferredSize(200.dp),
shape = CircleShape,
) {
Image(imageVector, modifier = Modifier.size(300.dp))
}
You can use scale type option available for scaling the bounds of an image to the bounds of its view. This option is available for ImageView.
You can choose
android:scaleType="centerCrop"
Reference:
ImageView ScaleType
Apply the clip Modifier using a CircleShape:
Image(
painter = painterResource(R.drawable.xxx),
contentDescription = "xxxx",
contentScale = ContentScale.Crop,
modifier = Modifier
.size(64.dp)
.clip(CircleShape)
)