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Cannot calculate specific dimensions for composable TextField

I am trying to create multiple items to encapsulate the specific behavior of every component but I cannot specify the dimensions for every view.
I want a Textfield with an X icon on its right
setContent {
Surface(
modifier = Modifier
.fillMaxSize()
.background(color = white)
.padding(horizontal = 15.dp)
) {
Row(horizontalArrangement = Arrangement.spacedBy(15.dp)) {
Searcher(
modifier = Modifier.weight(1f),
onTextChanged = { },
onSearchAction = { }
)
Image(
painter = painterResource(id = R.drawable.ic_close),
contentDescription = null,
colorFilter = ColorFilter.tint(blue)
)
}
}
}
The component is the following
#Composable
fun Searcher(
modifier: Modifier = Modifier,
onTextChanged: (String) -> Unit,
onSearchAction: () -> Unit
) {
Row {
SearcherField(
onTextChanged = onTextChanged,
onSearchAction = onSearchAction,
modifier = Modifier.weight(1f)
)
CircularSearch(
modifier = Modifier
.padding(horizontal = 10.dp)
.align(CenterVertically)
)
}
}
and the SearcherField:
#Composable
fun SearcherField(
modifier: Modifier = Modifier,
onTextChanged: (String) -> Unit,
onSearchAction: () -> Unit
) {
var fieldText by remember { mutableStateOf(emptyText) }
TextField(
value = fieldText,
onValueChange = { value ->
fieldText = value
if (value.length > 2)
onTextChanged(value)
},
singleLine = true,
textStyle = Typography.h5.copy(color = White),
colors = TextFieldDefaults.textFieldColors(
cursorColor = White,
focusedIndicatorColor = Transparent,
unfocusedIndicatorColor = Transparent,
backgroundColor = Transparent
),
trailingIcon = {
if (fieldText.isNotEmpty()) {
IconButton(onClick = {
fieldText = emptyText
}) {
Icon(
imageVector = Icons.Default.Close,
contentDescription = emptyText
)
}
}
},
placeholder = {
Text(
text = stringResource(id = R.string.dondebuscas),
style = Typography.h5.copy(color = White)
)
},
keyboardOptions = KeyboardOptions(imeAction = ImeAction.Search),
keyboardActions = KeyboardActions(
onSearch = {
onSearchAction()
}
),
modifier = modifier.fillMaxWidth()
)
}
But I don´t know why, but the component Searcher with the placeholder is rendered in two lines.
It´s all about the placeholder that seems to be resized for not having enough space because if I remove the placeholder, the component looks perfect.
Everything is in one line, not having a placeholder of two lines. I m trying to modify the size of every item but I am not able to get the expected result and I don´t know if the problem is just about the placeholder.
How can I solve it? UPDATE -> I found the error
Thanks in advance!

Add maxlines = 1 to the placeholder Text's parameters.
Your field is single -lune but your text is multi-line. I think it creates conflict in implementation.

Okay... I find that the problem is about the trailing icon. Is not visible when there is no text in the TextField but is still occupying some space in the view, that´s why the placeholder cannot occupy the entire space. The solution is the following.
val trailingIconView = #Composable {
IconButton(onClick = {
fieldText = emptyText
}) {
Icon(
imageVector = Icons.Default.Close,
contentDescription = emptyText
)
}
}
Create a variable with the icon and set it to the TextField only when is required
trailingIcon = if (fieldText.isNotEmpty()) trailingIconView else null,
With that, the trailing icon will be "gone" instead of "invisible" (the old way).
Still have a lot to learn.

Why can't I use Modifier.padding(top = 20.dp) to increase space in AlertDialog when I use JetPack Compose?

The Code A displays a dialog box based AlertDialog, and I get Image A when I run Code A.
I find the space between title = { Text(text = dialogTitle) } and text = {...} is too closer in Image A.
So I set Modifier.padding(top = 100.dp) to wish to increase the space between the two controls, but I only get Image B, it seems that Modifier.padding(top = 100.dp) doesn't work as expected, how can I fix it?
Code A
#Composable
fun EditTextDialog(
isShow: Boolean,
onDismiss: () -> Unit,
onConfirm: (String) -> Unit,
saveTitle: String = stringResource(R.string.dialog_save_title),
cancelTitle:String = stringResource(R.string.dialog_cancel_title),
dialogTitle:String ="Edit",
editFieldContent:String ="",
) {
var mText by remember(editFieldContent){ mutableStateOf(editFieldContent) }
val cleanAndDismiss = {
mText = editFieldContent
onDismiss()
}
if (isShow) {
AlertDialog(
title = { Text(text = dialogTitle) },
text = {
Column(
Modifier.padding(top = 20.dp)
//Modifier.padding(top = 100.dp)
//Modifier.height(100.dp), //The same result as Image A
//verticalArrangement = Arrangement.Center
) {
TextField(
value = mText,
onValueChange = { mText = it }
)
}
},
confirmButton = {
TextButton(onClick = { onConfirm(mText) }) {
Text(text = saveTitle)
}
},
dismissButton = {
TextButton(onClick = cleanAndDismiss) {
Text(text = cancelTitle)
}
},
onDismissRequest = cleanAndDismiss
)
}
}
Image A
Image B

With M3 AlertDialog (androidx.compose.material3.AlertDialog) it works.
With M2 AlertDialog, one solution is to remove the title attribute and use the text attribute for the whole layout.
AlertDialog(
onDismissRequest = {},
text = {
Column(){
Text(text = "Title")
Spacer(Modifier.height(30.dp))
TextField(
value = "mText",
onValueChange = { },
)
}
},
//buttons..
)

I don't understand what you're trying to do. If you want more space between the TextField and the dialog buttons, then you don't want a top padding. You want padding below the TextField, so it would be bottom padding on the column.
Also, there's a chance that it won't work properly inside a Column, and you might have to switch it out for Box. And if that doesn't work for some reason, just add a spacer below the TextField:
Spacer(Modifier.height(20.dp).fillMaxWidth())

I assume you are using Material AlertDialog? If yes try using the Material3 variant. It should work then.
Just implement following library:
implementation "androidx.compose.material3:material3:1.0.0-beta02"
And make sure to use the Material3 AlertDialog Composable which is imported with the library.

TopAppBar and padding (Jetpack Compose)

I have a slightly different expectation for padding to work. How can this problem be solved? I see this only at TopAppBar.
CenterAlignedTopAppBar(
title = { Text(title) },
modifier = Modifier.statusBarsPadding(), // or padding(top = 24.dp)
actions = {
if (isSync) {
IconButton(
onClick = { },
enabled = false,
content = {
Icon(
painter = painterResource(R.drawable.ic_outline_cloud_download_24),
contentDescription = title,
tint = Color.DarkGray.copy(alpha = alpha)
)
}
)
}
},
scrollBehavior = scrollBehavior
)
UPD
For example, here it works as it should -> link

I made it myself based on the source code. Not quite universal, but just right for me. I will not give the full code, it is in the source code. I will give only the place where it is necessary to add.
#Composable
private fun TopAppBarLayout(...) {
Layout(
...,
modifier = modifier.statusBarsPadding()
) {
...
}
}
The rest of the code is identical to the original.
UPDATE 21
Now everything works out of the box.

Increase space between title and text of AlertDialog in Compose

In a simple AlertDialog like the following
AlertDialog(
modifier = Modifier,
title = {
Text(text = "Title")
},
text = {
Column(
modifier = Modifier.fillMaxWidth()
) {
TextButton() {
Text("Text 1")
}
TextButton() {
Text("Text 2")
}
}
},
confirmButton = {},
dismissButton = {}
)
how can I set a spacing between title and the first TextButton?
I tried to set a .padding(top = X.dp) to the Column, or the first text button, but this seems to only create a space at the bottom of the AlertDialog.
Also setting a custom .height(X.dp) did not work.
I'm using Compose 1.0.3

As #Abhimanyu perfectly explains why it's not working right now, here's the workaround I'm using to achieve the desired padding: putting the title in the content. AlertDialog's title param is optional, so it can be omitted/set to null, and instead the actual title can be put in the text parameter (which holds the dialog content).
#Composable
fun MyComposable() {
AlertDialog(
title = null,
text = {
Column {
Text(
modifier = Modifier.padding(vertical = 16.dp),
text = "Actual title"
)
// Rest of the dialog content
}
}
)
}

This is NOT an answer. It only provides info on why this is not possible.
The requirement seems not achievable at this point (6th Oct 2021) with the current compose version (1.0.3).
Will update this once that is possible.
The AlertDialog code does not respect the padding values provided.
AlertDialog.kt
// Baseline distance from the first line of the text to the last line of the title
private val TextBaselineDistanceFromTitle = 36.sp
The text offset used for the positioning is calculated like this.
val textOffset = if (titlePlaceable == null) {
TextBaselineDistanceFromTop.roundToPx()
} else {
TextBaselineDistanceFromTitle.roundToPx()
}
The distance between the first text in the text composable and the last text in the title composable is always 36.sp.
The Alert Dialog code in compose seems too hackish currently and I could see a few TODO's in the code.
Hopefully, the code will be changed to handle more scenarios soon.

I'm using this composable as first child inside Column
#Composable
fun HackySpacer(space: Dp) {
Box(
modifier = Modifier
.height(space)
.fillMaxWidth()
) {
Text(text = "")
}
}
It's not perfect, but it works for my usecase.

Is now possible using the new AlertDialog from Compose Material 3.
The default spacing between title and text is much more reasonable and it is also possible to add Modifier.padding() or Spacer() to both.
implementation("androidx.compose.material3:material3:1.0.0-alpha01")
androidx.compose.material3.AlertDialog(
onDismissRequest = {
openDialog.value = false
},
title = {
Text(text = "Title", modifier = Modifier.padding(50.dp))
},
text = {
Spacer(Modifier.height(50.dp))
Text(text = "Turned on by default")
},
confirmButton = {
TextButton(
onClick = {
openDialog.value = false
}
) {
Text("Confirm")
}
},
dismissButton = {
TextButton(
onClick = {
openDialog.value = false
}
) {
Text("Dismiss")
}
}
)

Jetpack compoes lazycolumn skipping frames (lagging)

Hi i'm trying to implement a lazycolumn of a list of posts, I tested it on the emulator api 21 and 29 and it looks kinda smooth on the api 29 it's a little bit laggy, when I tested it on a physical device it was lagging, It looks like it's skipping frames or something..
I tried to remove some views that uses imageVector to see if that was the problem and still the same problem.
This is my composable view:
#Composable
fun HomePostView(
category: String,
imagesUrl: List<String> = listOf(imageHolder),
doctorProfileImage: String = imageUrl,
title: String,
subTitle: String
) {
Card(
shape = PostCardShape.large, modifier = Modifier
.padding(horizontal = 3.dp)
.fillMaxWidth()
) {
Column {
PostTopView(
category = category,
onOptionsClicked = { /*TODO option click*/ },
onBookmarkClicked = {/*TODO bookmark click*/ })
CoilImage(
data = imagesUrl[0],
fadeIn = true,
contentDescription = "post_image",
modifier = Modifier
.fillMaxWidth()
.requiredHeight(190.dp)
.padding(horizontal = contentPadding),
contentScale = ContentScale.Crop
)
Spacer(modifier = Modifier.height(10.dp))
PostDoctorContent(
doctorProfileImage = doctorProfileImage,
title = title,
subTitle = subTitle
)
Spacer(modifier = Modifier.height(contentPadding))
PostBottomView(likesCount = 293, commentsCount = 22)
Spacer(modifier = Modifier.height(contentPadding))
}
}
Spacer(modifier = Modifier.height(10.dp))
}
#Composable
private fun PostDoctorContent(doctorProfileImage: String, title: String, subTitle: String) {
Row(
modifier = Modifier
.fillMaxWidth()
.padding(horizontal = contentPadding)
) {
CoilImage(data = doctorProfileImage,
contentScale = ContentScale.Crop,
contentDescription = null,
fadeIn = true,
modifier = Modifier
.size(30.dp)
.clip(CircleShape)
.clickable {
/*Todo on doctor profile clicked*/
})
Column {
Text(
text = title, fontSize = 14.sp, maxLines = 1,
overflow = TextOverflow.Ellipsis,
modifier = Modifier.padding(horizontal = contentPadding)
)
Text(
text = subTitle,
fontSize = 11.sp,
color = LightTextColor,
maxLines = 2,
overflow = TextOverflow.Ellipsis,
modifier = Modifier.padding(horizontal = contentPadding)
)
}
}
}
#Composable
private fun PostBottomView(likesCount: Long, commentsCount: Long) {
Row(
modifier = Modifier.padding(horizontal = contentPadding),
verticalAlignment = Alignment.CenterVertically
) {
Row(
Modifier
.clip(RoundedCornerShape(50))
.clickable { /*Todo on like clicked*/ }
.padding(5.dp),
verticalAlignment = Alignment.CenterVertically
) {
Icon(
imageVector = ImageVector.vectorResource(id = R.drawable.ic_heart),
contentDescription = "Like"
)
Spacer(modifier = Modifier.width(5.dp))
Text(text = likesCount.toString(), fontSize = 9.sp)
}
Spacer(Modifier.width(20.dp))
Row(
Modifier
.clip(RoundedCornerShape(50))
.clickable { /*Todo on comment clicked*/ }
.padding(5.dp),
verticalAlignment = Alignment.CenterVertically
) {
Icon(
imageVector = ImageVector.vectorResource(id = R.drawable.ic_comment),
contentDescription = "Comment"
)
Spacer(modifier = Modifier.width(5.dp))
Text(text = commentsCount.toString(), fontSize = 9.sp)
}
}
}
#Composable
private fun PostTopView(
category: String,
onOptionsClicked: () -> Unit,
onBookmarkClicked: () -> Unit
) {
Row(
modifier = Modifier.fillMaxWidth(),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.SpaceBetween
) {
Row(verticalAlignment = Alignment.CenterVertically) {
IconButton(onClick = onOptionsClicked) {
Icon(
imageVector = ImageVector.vectorResource(id = R.drawable.ic_threedots),
contentDescription = "Options",
tint = Color.Unspecified
)
}
Text(text = category, fontSize = 16.sp, color = LightTextColor)
}
IconButton(onClick = onBookmarkClicked) {
Icon(
imageVector = ImageVector.vectorResource(id = R.drawable.ic_bookmark),
contentDescription = "Bookmark"
)
}
}
}
and the lazyColumn:
LazyColumn(contentPadding = paddingValues , state = state ) {
item {
Spacer(modifier = Modifier.height(10.dp))
DoctorsList(
viewModel.doctorListData.value,
onCardClicked = {})
}
items(30) { post ->
HomePostView(
category = "Public Health ",
title = "Food Importance",
subTitle = "you should eat every day it's healthy and important for you, and drink water every 2 hours and what you should do is you should run every day for an hour"
)
}
}
Note: I'm still not using a viewmodel i'm just testing the view with fake data

This may not work for anyone else but on an earlier version (1.0.0-beta01) I saw a very large improvement in performance when I switched
lazy(items) { item ->
...
}
to
items.forEach { item ->
lazy {
...
}
}
I have no idea why and I'm not sure if this is still the case in later versions but its worth checking. So for the example given in the question, that would mean changing
items(30) {
...
}
to
repeat(30) {
item {
...
}
}

TLDR: Make sure your new LazyColumn compose element is not within a RelativeLayout or LinearLayout.
After some investigation the solution to this issue for us was the view in which the LazyColumn was constrained.
Our project uses a combination of Jetpack Compose and the older XML layout files. Our new compose elements were embedded within a RelativeLayout of an existing XML file. This was where the problem was. The compose element would be given the entire screen and then the onMeasure function of the compose element was called to re-configure the view and add our bottom nav bar...this onMeasure was called over and over again, which also in the case of a LazyColumn the re-measuring was throwing out the cache as the height had changed.
The solution for us was to change the RelativeLayout that contained both the new compose element and the bottom nav bar and replace it with a ConstraintLayout. This prevented the onMeasure from being called more than twice and gave a massive performance increase.

Try to build release build with turn off debug logs. should be works fine.

Ok, So far I know that there is an issue with the API when it comes to performance ...But what I found is this
Actually, In my case, I was just loading the image with 2980*3750 pixels image. I just crunched my resources to shorter pixels by some other tools
Now the lag is not present...

In my case, after I set the height of ComposeView to a specific value, it make LazyColumn scroll smooth.
Therefore, I create a XML file like
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.compose.ui.platform.ComposeView
android:id="#+id/compose"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
Fragment
override fun onViewCreated(view: View, savedInstanceState: Bundle ? ) {
super.onViewCreated(view, savedInstanceState)
view.doOnLayout {
compose.layoutParams.height = view.height
compose.requestLayout()
}
}
I know ComposeView height already match_parent so set the height for it again on Fragment seem useless. However, without setting the height, LazyColumn will lagging when scroll.
I am not sure if it will work in all device but work well on my Pixel and Xiomi.

If you are using JPGs or PNGs in your project then check for their size, images having larger size causes a lots of lagging issues on low end devices.
I was having the same issue with my simple LazyColumn list and turned out I was using a JPG having size larger than 2MBs.