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Update state based #619

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Merged
merged 8 commits into from
Sep 11, 2025
Merged

Update state based #619

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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
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37 changes: 20 additions & 17 deletions compose/snippets/src/main/java/com/example/compose/snippets/text/StateBasedText.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -38,14 +38,14 @@ 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
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.input.ImeAction
import androidx.compose.ui.text.input.KeyboardType
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.core.text.isDigitsOnly
Expand Down Expand Up @@ -144,21 +144,19 @@ 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("1234567890")

TextField(
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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()) {
keyboardOptions = KeyboardOptions(
keyboardType = KeyboardType.Phone
),
inputTransformation = InputTransformation.maxLength(10).then {
if (!asCharSequence().isDigitsOnly()) {
revertAllChanges()
}
},
Expand All @@ -174,32 +172,37 @@ 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