/
MigrationCommonScenariosSnippets.kt
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/
MigrationCommonScenariosSnippets.kt
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/*
* Copyright 2023 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.interop
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.ExperimentalFoundationApi
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Row
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.lazy.items
import androidx.compose.foundation.lazy.itemsIndexed
import androidx.compose.foundation.pager.HorizontalPager
import androidx.compose.foundation.pager.rememberPagerState
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Add
import androidx.compose.material.icons.filled.Image
import androidx.compose.material3.Divider
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.ExtendedFloatingActionButton
import androidx.compose.material3.FloatingActionButton
import androidx.compose.material3.Icon
import androidx.compose.material3.ModalDrawerSheet
import androidx.compose.material3.ModalNavigationDrawer
import androidx.compose.material3.NavigationDrawerItem
import androidx.compose.material3.Scaffold
import androidx.compose.material3.SnackbarHost
import androidx.compose.material3.SnackbarHostState
import androidx.compose.material3.Text
import androidx.compose.material3.TopAppBar
import androidx.compose.material3.TopAppBarDefaults
import androidx.compose.runtime.Composable
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.ui.Modifier
import androidx.compose.ui.input.nestedscroll.nestedScroll
import androidx.compose.ui.platform.ComposeView
import androidx.compose.ui.unit.dp
import androidx.fragment.app.Fragment
import androidx.hilt.navigation.compose.hiltViewModel
import androidx.lifecycle.ViewModel
import androidx.navigation.NavHostController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.composable
import androidx.navigation.compose.rememberNavController
import androidx.recyclerview.widget.DividerItemDecoration
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import kotlinx.coroutines.launch
class RVActivity : ComponentActivity() {
private lateinit var composeView: ComposeView
private lateinit var recyclerView: RecyclerView
private fun step2() {
// [START android_compose_interop_migration_common_scenarios_recyclerview_step2]
// recyclerView.layoutManager = LinearLayoutManager(context)
composeView.setContent {
LazyColumn(Modifier.fillMaxSize()) {
// We use a LazyColumn since the layout manager of the RecyclerView is a vertical LinearLayoutManager
}
}
// [END android_compose_interop_migration_common_scenarios_recyclerview_step2]
}
private fun step4() {
// [START android_compose_interop_migration_common_scenarios_recyclerview_step4]
val data = listOf<MyData>(/* ... */)
composeView.setContent {
LazyColumn(Modifier.fillMaxSize()) {
items(data) {
ListItem(it)
}
}
}
// [END android_compose_interop_migration_common_scenarios_recyclerview_step4]
}
private fun commonUseCase1() {
// [START android_compose_interop_migration_common_scenarios_recyclerview_common_use_case_1]
val itemDecoration = DividerItemDecoration(recyclerView.context, LinearLayoutManager.VERTICAL)
recyclerView.addItemDecoration(itemDecoration)
// [END android_compose_interop_migration_common_scenarios_recyclerview_common_use_case_1]
}
@Composable
fun commonUseCase2(data: List<MyData>) {
// [START android_compose_interop_migration_common_scenarios_recyclerview_common_use_case_2]
LazyColumn(Modifier.fillMaxSize()) {
itemsIndexed(data) { index, d ->
ListItem(d)
if (index != data.size - 1) {
Divider()
}
}
}
// [END android_compose_interop_migration_common_scenarios_recyclerview_common_use_case_2]
}
}
// [START android_compose_interop_migration_common_scenarios_recyclerview_step3]
@Composable
fun ListItem(data: MyData, modifier: Modifier = Modifier) {
Row(modifier.fillMaxWidth()) {
Text(text = data.name)
// … other composables required for displaying `data`
}
}
// [END android_compose_interop_migration_common_scenarios_recyclerview_step3]
// [START android_compose_interop_migration_common_scenarios_navigation_step_2]
class SampleActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
// setContentView<ActivitySampleBinding>(this, R.layout.activity_sample)
setContent {
SampleApp(/* ... */)
}
}
}
// [END android_compose_interop_migration_common_scenarios_navigation_step_2]
private object MigrationCommonScenariosNavigationStep3 {
// [START android_compose_interop_migration_common_scenarios_navigation_step_3]
@Composable
fun SampleApp() {
val navController = rememberNavController()
// ...
}
// [END android_compose_interop_migration_common_scenarios_navigation_step_3]
}
private object MigrationCommonScenariosNavigationStep4 {
// [START android_compose_interop_migration_common_scenarios_navigation_step_4]
@Composable
fun SampleApp() {
val navController = rememberNavController()
SampleNavHost(navController = navController)
}
@Composable
fun SampleNavHost(
navController: NavHostController
) {
NavHost(navController = navController, startDestination = "first") {
// ...
}
}
// [END android_compose_interop_migration_common_scenarios_navigation_step_4]
}
// [START android_compose_interop_migration_common_scenarios_navigation_step_5]
class FirstFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View {
return ComposeView(requireContext()).apply {
setContent {
// FirstScreen(...) EXTRACT FROM HERE
}
}
}
}
@Composable
fun SampleNavHost(
navController: NavHostController
) {
NavHost(navController = navController, startDestination = "first") {
composable("first") {
FirstScreen(/* ... */) // EXTRACT TO HERE
}
composable("second") {
SecondScreen(/* ... */)
}
// ...
}
}
// [END android_compose_interop_migration_common_scenarios_navigation_step_5]
// [START android_compose_interop_migration_common_scenarios_navigation_step_6]
@Composable
fun FirstScreen(
// viewModel: FirstViewModel = viewModel(),
viewModel: FirstViewModel = hiltViewModel(),
onButtonClick: () -> Unit = {},
) {
// ...
}
// [END android_compose_interop_migration_common_scenarios_navigation_step_6]
private object MigrationCommonScenariosNavigationStep7 {
// [START android_compose_interop_migration_common_scenarios_navigation_step_7]
@Composable
fun SampleNavHost(
navController: NavHostController
) {
NavHost(navController = navController, startDestination = "first") {
composable("first") {
FirstScreen(
onButtonClick = {
// findNavController().navigate(firstScreenToSecondScreenAction)
navController.navigate("second_screen_route")
}
)
}
composable("second") {
SecondScreen(
onIconClick = {
// findNavController().navigate(secondScreenToThirdScreenAction)
navController.navigate("third_screen_route")
}
)
}
// ...
}
}
// [END android_compose_interop_migration_common_scenarios_navigation_step_7]
}
class CoordinatorLayoutActivity : ComponentActivity() {
private lateinit var composeView: ComposeView
private fun step2() {
// [START android_compose_interop_migration_common_scenarios_coordinatorlayout_step2]
composeView.setContent {
Scaffold(Modifier.fillMaxSize()) { contentPadding ->
// Scaffold contents
// [START_EXCLUDE]
Box(Modifier.padding(contentPadding))
// [END_EXCLUDE]
}
}
// [END android_compose_interop_migration_common_scenarios_coordinatorlayout_step2]
}
@OptIn(ExperimentalFoundationApi::class)
private fun step3() {
// [START android_compose_interop_migration_common_scenarios_coordinatorlayout_step3]
composeView.setContent {
Scaffold(Modifier.fillMaxSize()) { contentPadding ->
val pagerState = rememberPagerState {
10
}
HorizontalPager(
state = pagerState,
modifier = Modifier.padding(contentPadding)
) { /* Page contents */ }
}
}
// [END android_compose_interop_migration_common_scenarios_coordinatorlayout_step3]
}
@OptIn(ExperimentalFoundationApi::class, ExperimentalMaterial3Api::class)
private fun step4() {
// [START android_compose_interop_migration_common_scenarios_coordinatorlayout_step4]
composeView.setContent {
Scaffold(
Modifier.fillMaxSize(),
topBar = {
TopAppBar(
title = {
Text("My App")
}
)
},
floatingActionButton = {
FloatingActionButton(
onClick = { /* Handle click */ }
) {
Icon(
Icons.Filled.Add,
contentDescription = "Add Button"
)
}
}
) { contentPadding ->
val pagerState = rememberPagerState {
10
}
HorizontalPager(
state = pagerState,
modifier = Modifier.padding(contentPadding)
) { /* Page contents */ }
}
}
// [END android_compose_interop_migration_common_scenarios_coordinatorlayout_step4]
}
@OptIn(ExperimentalMaterial3Api::class)
@Composable
private fun commonUseCaseToolbars() {
// [START android_compose_interop_migration_common_scenarios_coordinatorlayout_toolbars]
// 1. Create the TopAppBarScrollBehavior
val scrollBehavior = TopAppBarDefaults.enterAlwaysScrollBehavior()
Scaffold(
topBar = {
TopAppBar(
title = {
Text("My App")
},
// 2. Provide scrollBehavior to TopAppBar
scrollBehavior = scrollBehavior
)
},
// 3. Connect the scrollBehavior.nestedScrollConnection to the Scaffold
modifier = Modifier
.fillMaxSize()
.nestedScroll(scrollBehavior.nestedScrollConnection)
) { contentPadding ->
/* Contents */
// [START_EXCLUDE]
Box(Modifier.padding(contentPadding))
// [END_EXCLUDE]
}
// [END android_compose_interop_migration_common_scenarios_coordinatorlayout_toolbars]
}
@Composable
private fun commonUseCaseDrawers() {
// [START android_compose_interop_migration_common_scenarios_coordinatorlayout_drawers]
ModalNavigationDrawer(
drawerContent = {
ModalDrawerSheet {
Text("Drawer title", modifier = Modifier.padding(16.dp))
Divider()
NavigationDrawerItem(
label = { Text(text = "Drawer Item") },
selected = false,
onClick = { /*TODO*/ }
)
// ...other drawer items
}
}
) {
Scaffold(Modifier.fillMaxSize()) { contentPadding ->
// Scaffold content
// [START_EXCLUDE]
Box(Modifier.padding(contentPadding))
// [END_EXCLUDE]
}
}
// [END android_compose_interop_migration_common_scenarios_coordinatorlayout_drawers]
}
@Composable
private fun commonUseCaseSnackbars() {
// [START android_compose_interop_migration_common_scenarios_coordinatorlayout_snackbars]
val scope = rememberCoroutineScope()
val snackbarHostState = remember { SnackbarHostState() }
Scaffold(
snackbarHost = {
SnackbarHost(hostState = snackbarHostState)
},
floatingActionButton = {
ExtendedFloatingActionButton(
text = { Text("Show snackbar") },
icon = { Icon(Icons.Filled.Image, contentDescription = "") },
onClick = {
scope.launch {
snackbarHostState.showSnackbar("Snackbar")
}
}
)
}
) { contentPadding ->
// Screen content
// [START_EXCLUDE]
Box(Modifier.padding(contentPadding))
// [END_EXCLUDE]
}
// [END android_compose_interop_migration_common_scenarios_coordinatorlayout_snackbars]
}
}
/*
Fakes needed for snippets to build:
*/
@Composable
fun SampleApp() {
}
@Composable
fun SecondScreen(
onIconClick: () -> Unit = {},
) {
}
class FirstViewModel : ViewModel()
data class MyData(
val name: String
)