Skip to content

Update state based #619

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 8 commits into from
Sep 11, 2025
Merged

Update state based #619

Changes from 4 commits
Commits
Show all changes
8 commits
Select commit Hold shift + click to select a range
3e9db06
Update StateBasedText.kt
MagicalMeghan Sep 10, 2025
64c4afc
Update StateBasedText.kt
MagicalMeghan Sep 10, 2025
e48b51c
Update StateBasedText.kt
MagicalMeghan Sep 10, 2025
b61f39b
Apply Spotless
MagicalMeghan Sep 10, 2025
0c5edd5
Merge branch 'main' into update-state-based
MagicalMeghan Sep 10, 2025
14bfdc7
Update StateBasedText.kt
MagicalMeghan Sep 10, 2025
0e0170d
Merge branch 'update-state-based' of https://github.com/android/snipp…
MagicalMeghan Sep 10, 2025
fb9ceb0
Update StateBasedText.kt
MagicalMeghan Sep 11, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
31 changes: 15 additions & 16 deletions compose/snippets/src/main/java/com/example/compose/snippets/text/StateBasedText.kt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,6 @@ import androidx.compose.material.TextField
//noinspection UsingMaterialAndMaterial3Libraries
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Brush
Expand Down Expand Up @@ -144,21 +143,16 @@ fun TextFieldInitialState() {
// [END android_compose_state_text_7]
}

@Preview(showBackground = true)
@Composable
fun TextFieldBuffer() {
// [START android_compose_state_text_8]
val phoneNumberState = rememberTextFieldState()

LaunchedEffect(phoneNumberState) {
phoneNumberState.edit { // TextFieldBuffer scope
append("123456789")
}
}
val phoneNumberState = rememberTextFieldState("123456789")

TextField(
Copy link

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Suggest two changes to this sample: Specify keyboard options (since it will be copy/paste) and add maxLength

TextField(
    state = phoneNumberState,
    keyboardOptions = KeyboardOptions(
        keyboardType = KeyboardType.Phone
    ),
    inputTransformation = InputTransformation.maxLength(10).then {
        if (asCharSequence().isDigitsOnly()) {
            revertAllChanges()
        }
    },
    outputTransformation = OutputTransformation {
        if (length > 0) insert(0, "(")
        if (length > 4) insert(4, ")")
        if (length > 8) insert(8, "-")
    }
)

state = phoneNumberState,
inputTransformation = InputTransformation { // TextFieldBuffer scope
if (asCharSequence().isDigitsOnly()) {
if (!asCharSequence().isDigitsOnly()) {
revertAllChanges()
}
},
Expand All @@ -174,32 +168,37 @@ fun TextFieldBuffer() {
@Preview
@Composable
fun EditTextFieldState() {
// [START android_compose_state_text_9]
val usernameState = rememberTextFieldState("I love Android")
editTFState(usernameState)
}

fun editTFState(textFieldState: TextFieldState) {
// [START android_compose_state_text_9]
// Initial textFieldState text passed in is "I love Android"
// textFieldState.text : I love Android
// textFieldState.selection: TextRange(14, 14)
usernameState.edit { insert(14, "!") }
textFieldState.edit { insert(14, "!") }
// textFieldState.text : I love Android!
// textFieldState.selection: TextRange(15, 15)
usernameState.edit { replace(7, 14, "Compose") }
textFieldState.edit { replace(7, 14, "Compose") }
// textFieldState.text : I love Compose!
// textFieldState.selection: TextRange(15, 15)
usernameState.edit { append("!!!") }
textFieldState.edit { append("!!!") }
// textFieldState.text : I love Compose!!!!
// textFieldState.selection: TextRange(18, 18)
usernameState.edit { selectAll() }
textFieldState.edit { selectAll() }
// textFieldState.text : I love Compose!!!!
// textFieldState.selection: TextRange(0, 18)
// [END android_compose_state_text_9]

// [START android_compose_state_text_10]
usernameState.setTextAndPlaceCursorAtEnd("I really love Android")
textFieldState.setTextAndPlaceCursorAtEnd("I really love Android")
// textFieldState.text : I really love Android
// textFieldState.selection : TextRange(21, 21)
// [END android_compose_state_text_10]

// [START android_compose_state_text_11]
usernameState.clearText()
textFieldState.clearText()
// textFieldState.text :
// textFieldState.selection : TextRange(0, 0)
// [END android_compose_state_text_11]
Expand Down