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compose/snippets/src/main/java/com/example/compose/snippets/components/SearchBar.kt
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| /* | ||
| * Copyright 2024 The Android Open Source Project | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package com.example.compose.snippets.components | ||
|
|
||
| import androidx.compose.foundation.clickable | ||
| import androidx.compose.foundation.layout.Arrangement | ||
| import androidx.compose.foundation.layout.Box | ||
| import androidx.compose.foundation.layout.Column | ||
| import androidx.compose.foundation.layout.PaddingValues | ||
| import androidx.compose.foundation.layout.fillMaxSize | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.foundation.lazy.LazyColumn | ||
| import androidx.compose.foundation.rememberScrollState | ||
| import androidx.compose.foundation.verticalScroll | ||
| import androidx.compose.material.icons.Icons | ||
| import androidx.compose.material.icons.filled.MoreVert | ||
| import androidx.compose.material.icons.filled.Search | ||
| import androidx.compose.material.icons.filled.Star | ||
| import androidx.compose.material3.Button | ||
| import androidx.compose.material3.ExperimentalMaterial3Api | ||
| import androidx.compose.material3.Icon | ||
| import androidx.compose.material3.ListItem | ||
| import androidx.compose.material3.ListItemDefaults | ||
| import androidx.compose.material3.SearchBar | ||
| import androidx.compose.material3.SearchBarDefaults | ||
| import androidx.compose.material3.Text | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.derivedStateOf | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableStateOf | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.runtime.saveable.rememberSaveable | ||
| import androidx.compose.runtime.setValue | ||
| import androidx.compose.ui.Alignment | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.semantics.isTraversalGroup | ||
| import androidx.compose.ui.semantics.semantics | ||
| import androidx.compose.ui.semantics.traversalIndex | ||
| import androidx.compose.ui.tooling.preview.Preview | ||
| import androidx.compose.ui.unit.dp | ||
|
|
||
| @Preview | ||
| @Composable | ||
| fun SearchBarExamples() { | ||
| Column( | ||
| modifier = Modifier | ||
| .padding(16.dp) | ||
| .fillMaxSize(), | ||
| verticalArrangement = Arrangement.spacedBy(24.dp), | ||
| horizontalAlignment = Alignment.CenterHorizontally, | ||
| ) { | ||
| var currentExample by remember { mutableStateOf<String?>(null) } | ||
|
|
||
| when (currentExample) { | ||
| "basic" -> SearchBarBasicFilterList() | ||
| "advanced" -> AppSearchBar() | ||
| else -> { | ||
| Button(onClick = { currentExample = "basic" }) { | ||
| Text("Basic search bar with filter") | ||
| } | ||
| Button(onClick = { currentExample = "advanced" }) { | ||
| Text("Advanced search bar with filter") | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @OptIn(ExperimentalMaterial3Api::class) | ||
| // [START android_compose_components_searchbarbasicfilterlist] | ||
| @Composable | ||
| fun SearchBarBasicFilterList(modifier: Modifier = Modifier) { | ||
| var text by rememberSaveable { mutableStateOf("") } | ||
| var expanded by rememberSaveable { mutableStateOf(false) } | ||
| Box( | ||
| modifier | ||
| .fillMaxSize() | ||
| .semantics { isTraversalGroup = true } | ||
| ) { | ||
| SearchBar( | ||
| modifier = Modifier | ||
| .align(Alignment.TopCenter) | ||
| .semantics { traversalIndex = 0f }, | ||
| inputField = { | ||
| SearchBarDefaults.InputField( | ||
| query = text, | ||
| onQueryChange = { text = it }, | ||
| onSearch = { expanded = false }, | ||
| expanded = expanded, | ||
| onExpandedChange = { expanded = it }, | ||
| placeholder = { Text("Hinted search text") } | ||
| ) | ||
| }, | ||
| expanded = expanded, | ||
| onExpandedChange = { expanded = it }, | ||
| ) { | ||
| Column(Modifier.verticalScroll(rememberScrollState())) { | ||
| repeat(4) { index -> | ||
| val resultText = "Suggestion $index" | ||
| ListItem( | ||
| headlineContent = { Text(resultText) }, | ||
| supportingContent = { Text("Additional info") }, | ||
| modifier = Modifier | ||
| .clickable { | ||
| text = resultText | ||
| expanded = false | ||
| } | ||
| .fillMaxWidth() | ||
| ) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| // [END android_compose_components_searchbarbasicfilterlist] | ||
|
|
||
| @Preview(showBackground = true) | ||
| @Composable | ||
| private fun SearchBarBasicFilterListPreview() { | ||
| SearchBarBasicFilterList() | ||
| } | ||
|
|
||
| // [START android_compose_components_searchbarfilterlist] | ||
| @OptIn(ExperimentalMaterial3Api::class) | ||
| @Composable | ||
| fun SearchBarFilterList( | ||
| list: List<String>, | ||
| modifier: Modifier = Modifier | ||
| ) { | ||
| var text by rememberSaveable { mutableStateOf("") } | ||
| val filteredList by remember { | ||
| derivedStateOf { | ||
| list.filter { it.lowercase().contains(text.lowercase()) } | ||
| } | ||
| } | ||
| var expanded by rememberSaveable { mutableStateOf(false) } | ||
|
|
||
| Box( | ||
| modifier | ||
| .fillMaxSize() | ||
| .semantics { isTraversalGroup = true } | ||
| ) { | ||
| SearchBar( | ||
| modifier = Modifier | ||
| .align(Alignment.TopCenter) | ||
| .semantics { traversalIndex = 0f }, | ||
| inputField = { | ||
| SearchBarDefaults.InputField( | ||
| query = text, | ||
| onQueryChange = { text = it }, | ||
| onSearch = { expanded = false }, | ||
| expanded = expanded, | ||
| onExpandedChange = { expanded = it }, | ||
| placeholder = { Text("Hinted search text") }, | ||
| leadingIcon = { Icon(Icons.Default.Search, contentDescription = "Search") }, | ||
| trailingIcon = { Icon(Icons.Default.MoreVert, contentDescription = "More options") }, | ||
| ) | ||
| }, | ||
| expanded = expanded, | ||
| onExpandedChange = { expanded = it }, | ||
| ) { | ||
| LazyColumn { | ||
| items(count = filteredList.size) { index -> | ||
| val resultText = filteredList[index] | ||
| ListItem( | ||
| headlineContent = { Text(resultText) }, | ||
| supportingContent = { Text("Additional info") }, | ||
| leadingContent = { | ||
| Icon( | ||
| Icons.Filled.Star, | ||
| contentDescription = "Starred item" | ||
| ) | ||
| }, | ||
| colors = ListItemDefaults.colors(containerColor = Color.Transparent), | ||
| modifier = Modifier | ||
| .clickable { | ||
| text = resultText | ||
| expanded = false | ||
| } | ||
| .fillMaxWidth() | ||
| .padding(horizontal = 16.dp, vertical = 4.dp) | ||
| ) | ||
| } | ||
| } | ||
| } | ||
| LazyColumn( | ||
| contentPadding = PaddingValues( | ||
| start = 16.dp, | ||
| top = 72.dp, | ||
| end = 16.dp, | ||
| bottom = 16.dp | ||
| ), | ||
| verticalArrangement = Arrangement.spacedBy(8.dp), | ||
| modifier = Modifier.semantics { | ||
| traversalIndex = 1f | ||
| }, | ||
| ) { | ||
| items(count = filteredList.size) { | ||
| Text(text = filteredList[it]) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| // [END android_compose_components_searchbarfilterlist] | ||
|
|
||
| @Preview(showBackground = true) | ||
| @Composable | ||
| fun AppSearchBar(modifier: Modifier = Modifier) { | ||
| SearchBarFilterList( | ||
| list = listOf( | ||
| "Cupcake", | ||
| "Donut", | ||
| "Eclair", | ||
| "Froyo", | ||
| "Gingerbread", | ||
| "Honeycomb", | ||
| "Ice Cream Sandwich", | ||
| "Jelly Bean", | ||
| "KitKat", | ||
| "Lollipop", | ||
| "Marshmallow", | ||
| "Nougat", | ||
| "Oreo", | ||
| "Pie" | ||
| ), | ||
| modifier | ||
| ) | ||
| } |
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