Build a Product Management Android App with Jetpack Compose
This tutorial demonstrates how to build a basic product management app. The app demonstrates management operations, photo upload, account creation and authentication using:
- Supabase Database - a Postgres database for storing your user data and Row Level Security so data is protected and users can only access their own information.
- Supabase Auth - users log in through magic links sent to their email (without having to set up a password).
- Supabase Storage - users can upload a profile photo.
If you get stuck while working through this guide, refer to the full example on GitHub.
Project setup#
Before we start building we're going to set up our Database and API. This is as simple as starting a new Project in Supabase and then creating a "schema" inside the database.
Create a project#
- Create a new project in the Supabase Dashboard.
- Enter your project details.
- Wait for the new database to launch.
Set up the database schema#
Now we are going to set up the database schema. You can just copy/paste the SQL from below and run it yourself.
-- Create a table for public profiles
create table
public.products (
id uuid not null default gen_random_uuid (),
name text not null,
price real not null,
image text null,
constraint products_pkey primary key (id)
) tablespace pg_default;
-- Set up Storage!
insert into storage.buckets (id, name)
values ('Product Image', 'Product Image');
-- Set up access controls for storage.
-- See https://supabase.com/docs/guides/storage/security/access-control#policy-examples for more details.
CREATE POLICY "Enable read access for all users" ON "storage"."objects"
AS PERMISSIVE FOR SELECT
TO public
USING (true)
CREATE POLICY "Enable insert for all users" ON "storage"."objects"
AS PERMISSIVE FOR INSERT
TO authenticated, anon
WITH CHECK (true)
CREATE POLICY "Enable update for all users" ON "storage"."objects"
AS PERMISSIVE FOR UPDATE
TO public
USING (true)
WITH CHECK (true)
Get the API Keys#
Now that you've created some database tables, you are ready to insert data using the auto-generated API.
We just need to get the Project URL and anon key from the API settings.
- Go to the API Settings page in the Dashboard.
- Find your Project
URL,anon, andservice_rolekeys on this page.
Set up Google Authentication#
From the Google Console, create a new project and add OAuth2 credentials.
In your Supabase Auth settings enable Google as a provider and set the required credentials as outlined in the auth docs.
Building the app#
Create new Android project#
Open Android Studio > New Project > Base Activity (Jetpack Compose).
Set up API key and secret securely#
Create local environment secret#
Create or edit the local.properties file at the root (same level as build.gradle) of your project.
Note: Do not commit this file to your source control, e.g. by adding it to your
.gitignorefile!
SUPABASE_ANON_KEY=YOUR_SUPABASE_ANON_KEY
SUPABASE_URL=YOUR_SUPABASE_URL
Read and set value to BuildConfig#
In your build.gradle (app) file, create a Properties object and read the values from your local.properties file by calling the buildConfigField method:
defaultConfig {
applicationId "com.example.manageproducts"
minSdkVersion 22
targetSdkVersion 33
versionCode 5
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
// Set value part
Properties properties = new Properties()
properties.load(project.rootProject.file("local.properties").newDataInputStream())
buildConfigField("String", "SUPABASE_ANON_KEY", "\"${properties.getProperty("SUPABASE_ANON_KEY")}\"")
buildConfigField("String", "SECRET", "\"${properties.getProperty("SECRET")}\"")
buildConfigField("String", "SUPABASE_URL", "\"${properties.getProperty("SUPABASE_URL")}\"")
}
Use value from BuildConfig#
Read the value from BuildConfig:
val url = BuildConfig.SUPABASE_URL
val apiKey = BuildConfig.SUPABASE_ANON_KEY
Set up Supabase dependencies#
In the build.gradle (app) file, add these dependencies then press "Sync now". Replace the dependency version placeholders $supabase_version and $ktor_version with their respective latest versions.
implementation "io.github.jan-tennert.supabase:postgrest-kt:$supabase_version"
implementation "io.github.jan-tennert.supabase:storage-kt:$supabase_version"
implementation "io.github.jan-tennert.supabase:gotrue-kt:$supabase_version"
implementation "io.ktor:ktor-client-android:$ktor_version"
implementation "io.ktor:ktor-client-core:$ktor_version"
implementation "io.ktor:ktor-utils:$ktor_version"
Also in the build.gradle (app) file, add the plugin for serialization. The version of this plugin should be the same as your Kotlin version.
plugins {
...
id 'org.jetbrains.kotlin.plugin.serialization' version '$kotlin_version'
...
}
Set up Hilt for dependency injection#
In the build.gradle (app) file, add the following:
implementation "com.google.dagger:hilt-android:$hilt_version"
annotationProcessor "com.google.dagger:hilt-compiler:$hilt_version"
implementation("androidx.hilt:hilt-navigation-compose:1.0.0")
Create a new ManageProductApplication.kt class extending Application with @HiltAndroidApp annotation:
// ManageProductApplication.kt
@HiltAndroidApp
class ManageProductApplication: Application()
Open the AndroidManifest.xml file, update name property of Application tag:
<application
...
android:name=".ManageProductApplication"
...
</application>
Create the MainActivity:
@AndroidEntryPoint
class MainActivity : ComponentActivity() {
//This will come later
}
Provide Supabase instances with Hilt#
To make the app easier to test, create a SupabaseMdule.kt file as follows:
@InstallIn(SingletonComponent::class)
@Module
object SupabaseModule {
@Provides
@Singleton
fun provideSupabaseClient(): SupabaseClient {
return createSupabaseClient(
supabaseUrl = BuildConfig.SUPABASE_URL,
supabaseKey = BuildConfig.SUPABASE_ANON_KEY
) {
install(Postgrest)
install(Auth) {
flowType = FlowType.PKCE
scheme = "app"
host = "supabase.com"
}
install(Storage)
}
}
@Provides
@Singleton
fun provideSupabaseDatabase(client: SupabaseClient): Postgrest {
return client.postgrest
}
@Provides
@Singleton
fun provideSupabaseAuth(client: SupabaseClient): Auth {
return client.auth
}
@Provides
@Singleton
fun provideSupabaseStorage(client: SupabaseClient): Storage {
return client.storage
}
}
Create a data transfer object#
Create a ProductDto.kt class and use annotations to parse data from Supabase:
@Serializable
data class ProductDto(
@SerialName("name")
val name: String,
@SerialName("price")
val price: Double,
@SerialName("image")
val image: String?,
@SerialName("id")
val id: String,
)
Create a Domain object in Product.kt expose the data in your view:
data class Product(
val id: String,
val name: String,
val price: Double,
val image: String?
)
Implement repositories#
Create a ProductRepository interface and its implementation named ProductRepositoryImpl. This holds the logic to interact with data sources from Supabase. Do the same with the AuthenticationRepository.
Create the Product Repository:
interface ProductRepository {
suspend fun createProduct(product: Product): Boolean
suspend fun getProducts(): List<ProductDto>?
suspend fun getProduct(id: String): ProductDto
suspend fun deleteProduct(id: String)
suspend fun updateProduct(
id: String, name: String, price: Double, imageName: String, imageFile: ByteArray
)
}
class ProductRepositoryImpl @Inject constructor(
private val postgrest: Postgrest,
private val storage: Storage,
) : ProductRepository {
override suspend fun createProduct(product: Product): Boolean {
return try {
withContext(Dispatchers.IO) {
val productDto = ProductDto(
name = product.name,
price = product.price,
)
postgrest.from("products").insert(productDto)
true
}
true
} catch (e: java.lang.Exception) {
throw e
}
}
override suspend fun getProducts(): List<ProductDto>? {
return withContext(Dispatchers.IO) {
val result = postgrest.from("products")
.select().decodeList<ProductDto>()
result
}
}
override suspend fun getProduct(id: String): ProductDto {
return withContext(Dispatchers.IO) {
postgrest.from("products").select {
filter {
eq("id", id)
}
}.decodeSingle<ProductDto>()
}
}
override suspend fun deleteProduct(id: String) {
return withContext(Dispatchers.IO) {
postgrest.from("products").delete {
filter {
eq("id", id)
}
}
}
}
override suspend fun updateProduct(
id: String,
name: String,
price: Double,
imageName: String,
imageFile: ByteArray
) {
withContext(Dispatchers.IO) {
if (imageFile.isNotEmpty()) {
val imageUrl =
storage.from("Product%20Image").upload(
path = "$imageName.png",
data = imageFile,
upsert = true
)
postgrest.from("products").update({
set("name", name)
set("price", price)
set("image", buildImageUrl(imageFileName = imageUrl))
}) {
eq("id", id)
}
} else {
postgrest.from("products").update({
set("name", name)
set("price", price)
}) {
eq("id", id)
}
}
}
}
// Because I named the bucket as "Product Image" so when it turns to an url, it is "%20"
// For better approach, you should create your bucket name without space symbol
private fun buildImageUrl(imageFileName: String) =
"${BuildConfig.SUPABASE_URL}/storage/v1/object/public/${imageFileName}".replace(" ", "%20")
}
Create the Authentication Repository:
interface AuthenticationRepository {
suspend fun signIn(email: String, password: String): Boolean
suspend fun signUp(email: String, password: String): Boolean
suspend fun signInWithGoogle(): Boolean
}
class AuthenticationRepositoryImpl @Inject constructor(
private val auth: Auth
) : AuthenticationRepository {
override suspend fun signIn(email: String, password: String): Boolean {
return try {
auth.signInWith(Email) {
this.email = email
this.password = password
}
true
} catch (e: Exception) {
false
}
}
override suspend fun signUp(email: String, password: String): Boolean {
return try {
auth.signUpWith(Email) {
this.email = email
this.password = password
}
true
} catch (e: Exception) {
false
}
}
override suspend fun signInWithGoogle(): Boolean {
return try {
auth.signInWith(Google)
true
} catch (e: Exception) {
false
}
}
}
Implement screens#
To navigate screens, use the AndroidX navigation library. For routes, implement a Destination interface:
interface Destination {
val route: String
val title: String
}
object ProductListDestination : Destination {
override val route = "product_list"
override val title = "Product List"
}
object ProductDetailsDestination : Destination {
override val route = "product_details"
override val title = "Product Details"
const val productId = "product_id"
val arguments = listOf(navArgument(name = productId) {
type = NavType.StringType
})
fun createRouteWithParam(productId: String) = "$route/${productId}"
}
object AddProductDestination : Destination {
override val route = "add_product"
override val title = "Add Product"
}
object AuthenticationDestination: Destination {
override val route = "authentication"
override val title = "Authentication"
}
object SignUpDestination: Destination {
override val route = "signup"
override val title = "Sign Up"
}
This will help later for navigating between screens.
Create a ProductListViewModel:
@HiltViewModel
class ProductListViewModel @Inject constructor(
private val productRepository: ProductRepository,
) : ViewModel() {
private val _productList = MutableStateFlow<List<Product>?>(listOf())
val productList: Flow<List<Product>?> = _productList
private val _isLoading = MutableStateFlow(false)
val isLoading: Flow<Boolean> = _isLoading
init {
getProducts()
}
fun getProducts() {
viewModelScope.launch {
val products = productRepository.getProducts()
_productList.emit(products?.map { it -> it.asDomainModel() })
}
}
fun removeItem(product: Product) {
viewModelScope.launch {
val newList = mutableListOf<Product>().apply { _productList.value?.let { addAll(it) } }
newList.remove(product)
_productList.emit(newList.toList())
// Call api to remove
productRepository.deleteProduct(id = product.id)
// Then fetch again
getProducts()
}
}
private fun ProductDto.asDomainModel(): Product {
return Product(
id = this.id,
name = this.name,
price = this.price,
image = this.image
)
}
}
Create the ProductListScreen.kt:
@OptIn(ExperimentalMaterial3Api::class, ExperimentalMaterialApi::class)
@Composable
fun ProductListScreen(
modifier: Modifier = Modifier,
navController: NavController,
viewModel: ProductListViewModel = hiltViewModel(),
) {
val isLoading by viewModel.isLoading.collectAsState(initial = false)
val swipeRefreshState = rememberSwipeRefreshState(isRefreshing = isLoading)
SwipeRefresh(state = swipeRefreshState, onRefresh = { viewModel.getProducts() }) {
Scaffold(
topBar = {
TopAppBar(
backgroundColor = MaterialTheme.colorScheme.primary,
title = {
Text(
text = stringResource(R.string.product_list_text_screen_title),
color = MaterialTheme.colorScheme.onPrimary,
)
},
)
},
floatingActionButton = {
AddProductButton(onClick = { navController.navigate(AddProductDestination.route) })
}
) { padding ->
val productList = viewModel.productList.collectAsState(initial = listOf()).value
if (!productList.isNullOrEmpty()) {
LazyColumn(
modifier = modifier.padding(padding),
contentPadding = PaddingValues(5.dp)
) {
itemsIndexed(
items = productList,
key = { _, product -> product.name }) { _, item ->
val state = rememberDismissState(
confirmStateChange = {
if (it == DismissValue.DismissedToStart) {
// Handle item removed
viewModel.removeItem(item)
}
true
}
)
SwipeToDismiss(
state = state,
background = {
val color by animateColorAsState(
targetValue = when (state.dismissDirection) {
DismissDirection.StartToEnd -> MaterialTheme.colorScheme.primary
DismissDirection.EndToStart -> MaterialTheme.colorScheme.primary.copy(
alpha = 0.2f
)
null -> Color.Transparent
}
)
Box(
modifier = modifier
.fillMaxSize()
.background(color = color)
.padding(16.dp),
) {
Icon(
imageVector = Icons.Filled.Delete,
contentDescription = null,
tint = MaterialTheme.colorScheme.primary,
modifier = modifier.align(Alignment.CenterEnd)
)
}
},
dismissContent = {
ProductListItem(
product = item,
modifier = modifier,
onClick = {
navController.navigate(
ProductDetailsDestination.createRouteWithParam(
item.id
)
)
},
)
},
directions = setOf(DismissDirection.EndToStart),
)
}
}
} else {
Text("Product list is empty!")
}
}
}
}
@Composable
private fun AddProductButton(
modifier: Modifier = Modifier,
onClick: () -> Unit,
) {
FloatingActionButton(
modifier = modifier,
onClick = onClick,
containerColor = MaterialTheme.colorScheme.primary,
contentColor = MaterialTheme.colorScheme.onPrimary
) {
Icon(
imageVector = Icons.Filled.Add,
contentDescription = null,
)
}
}
Create the ProductDetailsViewModel.kt:
@HiltViewModel
class ProductDetailsViewModel @Inject constructor(
private val productRepository: ProductRepository,
savedStateHandle: SavedStateHandle,
) : ViewModel() {
private val _product = MutableStateFlow<Product?>(null)
val product: Flow<Product?> = _product
private val _name = MutableStateFlow("")
val name: Flow<String> = _name
private val _price = MutableStateFlow(0.0)
val price: Flow<Double> = _price
private val _imageUrl = MutableStateFlow("")
val imageUrl: Flow<String> = _imageUrl
init {
val productId = savedStateHandle.get<String>(ProductDetailsDestination.productId)
productId?.let {
getProduct(productId = it)
}
}
private fun getProduct(productId: String) {
viewModelScope.launch {
val result = productRepository.getProduct(productId).asDomainModel()
_product.emit(result)
_name.emit(result.name)
_price.emit(result.price)
}
}
fun onNameChange(name: String) {
_name.value = name
}
fun onPriceChange(price: Double) {
_price.value = price
}
fun onSaveProduct(image: ByteArray) {
viewModelScope.launch {
productRepository.updateProduct(
id = _product.value?.id,
price = _price.value,
name = _name.value,
imageFile = image,
imageName = "image_${_product.value.id}",
)
}
}
fun onImageChange(url: String) {
_imageUrl.value = url
}
private fun ProductDto.asDomainModel(): Product {
return Product(
id = this.id,
name = this.name,
price = this.price,
image = this.image
)
}
}
Create the ProductDetailsScreen.kt:
@OptIn(ExperimentalCoilApi::class)
@SuppressLint("UnusedMaterialScaffoldPaddingParameter")
@Composable
fun ProductDetailsScreen(
modifier: Modifier = Modifier,
viewModel: ProductDetailsViewModel = hiltViewModel(),
navController: NavController,
productId: String?,
) {
val snackBarHostState = remember { SnackbarHostState() }
val coroutineScope = rememberCoroutineScope()
Scaffold(
snackbarHost = { SnackbarHost(snackBarHostState) },
topBar = {
TopAppBar(
navigationIcon = {
IconButton(onClick = {
navController.navigateUp()
}) {
Icon(
imageVector = Icons.Filled.ArrowBack,
contentDescription = null,
tint = MaterialTheme.colorScheme.onPrimary
)
}
},
backgroundColor = MaterialTheme.colorScheme.primary,
title = {
Text(
text = stringResource(R.string.product_details_text_screen_title),
color = MaterialTheme.colorScheme.onPrimary,
)
},
)
}
) {
val name = viewModel.name.collectAsState(initial = "")
val price = viewModel.price.collectAsState(initial = 0.0)
var imageUrl = Uri.parse(viewModel.imageUrl.collectAsState(initial = null).value)
val contentResolver = LocalContext.current.contentResolver
Column(
modifier = modifier
.padding(16.dp)
.fillMaxSize()
) {
val galleryLauncher =
rememberLauncherForActivityResult(ActivityResultContracts.GetContent())
{ uri ->
uri?.let {
if (it.toString() != imageUrl.toString()) {
viewModel.onImageChange(it.toString())
}
}
}
Image(
painter = rememberImagePainter(imageUrl),
contentScale = ContentScale.Fit,
contentDescription = null,
modifier = Modifier
.padding(16.dp, 8.dp)
.size(100.dp)
.align(Alignment.CenterHorizontally)
)
IconButton(modifier = modifier.align(alignment = Alignment.CenterHorizontally),
onClick = {
galleryLauncher.launch("image/*")
}) {
Icon(
imageVector = Icons.Filled.Edit,
contentDescription = null,
tint = MaterialTheme.colorScheme.primary
)
}
OutlinedTextField(
label = {
Text(
text = "Product name",
color = MaterialTheme.colorScheme.primary,
style = MaterialTheme.typography.titleMedium
)
},
maxLines = 2,
shape = RoundedCornerShape(32),
modifier = modifier.fillMaxWidth(),
value = name.value,
onValueChange = {
viewModel.onNameChange(it)
},
)
Spacer(modifier = modifier.height(12.dp))
OutlinedTextField(
label = {
Text(
text = "Product price",
color = MaterialTheme.colorScheme.primary,
style = MaterialTheme.typography.titleMedium
)
},
maxLines = 2,
shape = RoundedCornerShape(32),
modifier = modifier.fillMaxWidth(),
value = price.value.toString(),
keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
onValueChange = {
viewModel.onPriceChange(it.toDouble())
},
)
Spacer(modifier = modifier.weight(1f))
Button(
modifier = modifier.fillMaxWidth(),
onClick = {
if (imageUrl.host?.contains("supabase") == true) {
viewModel.onSaveProduct(image = byteArrayOf())
} else {
val image = uriToByteArray(contentResolver, imageUrl)
viewModel.onSaveProduct(image = image)
}
coroutineScope.launch {
snackBarHostState.showSnackbar(
message = "Product updated successfully !",
duration = SnackbarDuration.Short
)
}
}) {
Text(text = "Save changes")
}
Spacer(modifier = modifier.height(12.dp))
OutlinedButton(
modifier = modifier
.fillMaxWidth(),
onClick = {
navController.navigateUp()
}) {
Text(text = "Cancel")
}
}
}
}
private fun getBytes(inputStream: InputStream): ByteArray {
val byteBuffer = ByteArrayOutputStream()
val bufferSize = 1024
val buffer = ByteArray(bufferSize)
var len = 0
while (inputStream.read(buffer).also { len = it } != -1) {
byteBuffer.write(buffer, 0, len)
}
return byteBuffer.toByteArray()
}
private fun uriToByteArray(contentResolver: ContentResolver, uri: Uri): ByteArray {
if (uri == Uri.EMPTY) {
return byteArrayOf()
}
val inputStream = contentResolver.openInputStream(uri)
if (inputStream != null) {
return getBytes(inputStream)
}
return byteArrayOf()
}
Create a AddProductScreen:
@SuppressLint("UnusedMaterial3ScaffoldPaddingParameter")
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun AddProductScreen(
modifier: Modifier = Modifier,
navController: NavController,
viewModel: AddProductViewModel = hiltViewModel(),
) {
Scaffold(
topBar = {
TopAppBar(
navigationIcon = {
IconButton(onClick = {
navController.navigateUp()
}) {
Icon(
imageVector = Icons.Filled.ArrowBack,
contentDescription = null,
tint = MaterialTheme.colorScheme.onPrimary
)
}
},
backgroundColor = MaterialTheme.colorScheme.primary,
title = {
Text(
text = stringResource(R.string.add_product_text_screen_title),
color = MaterialTheme.colorScheme.onPrimary,
)
},
)
}
) { padding ->
val navigateAddProductSuccess =
viewModel.navigateAddProductSuccess.collectAsState(initial = null).value
val isLoading =
viewModel.isLoading.collectAsState(initial = null).value
if (isLoading == true) {
LoadingScreen(message = "Adding Product",
onCancelSelected = {
navController.navigateUp()
})
} else {
SuccessScreen(
message = "Product added",
onMoreAction = {
viewModel.onAddMoreProductSelected()
},
onNavigateBack = {
navController.navigateUp()
})
}
}
}
Create the AddProductViewModel.kt:
@HiltViewModel
class AddProductViewModel @Inject constructor(
private val productRepository: ProductRepository,
) : ViewModel() {
private val _isLoading = MutableStateFlow(false)
val isLoading: Flow<Boolean> = _isLoading
private val _showSuccessMessage = MutableStateFlow(false)
val showSuccessMessage: Flow<Boolean> = _showSuccessMessage
fun onCreateProduct(name: String, price: Double) {
if (name.isEmpty() || price <= 0) return
viewModelScope.launch {
_isLoading.value = true
val product = Product(
id = UUID.randomUUID().toString(),
name = name,
price = price,
)
productRepository.createProduct(product = product)
_isLoading.value = false
_showSuccessMessage.emit(true)
}
}
}
Create a SignUpViewModel:
@HiltViewModel
class SignUpViewModel @Inject constructor(
private val authenticationRepository: AuthenticationRepository
) : ViewModel() {
private val _email = MutableStateFlow("")
val email: Flow<String> = _email
private val _password = MutableStateFlow("")
val password = _password
fun onEmailChange(email: String) {
_email.value = email
}
fun onPasswordChange(password: String) {
_password.value = password
}
fun onSignUp() {
viewModelScope.launch {
authenticationRepository.signUp(
email = _email.value,
password = _password.value
)
}
}
}
Create the SignUpScreen.kt:
@Composable
fun SignUpScreen(
modifier: Modifier = Modifier,
navController: NavController,
viewModel: SignUpViewModel = hiltViewModel()
) {
val snackBarHostState = remember { SnackbarHostState() }
val coroutineScope = rememberCoroutineScope()
Scaffold(
snackbarHost = { androidx.compose.material.SnackbarHost(snackBarHostState) },
topBar = {
TopAppBar(
navigationIcon = {
IconButton(onClick = {
navController.navigateUp()
}) {
Icon(
imageVector = Icons.Filled.ArrowBack,
contentDescription = null,
tint = MaterialTheme.colorScheme.onPrimary
)
}
},
backgroundColor = MaterialTheme.colorScheme.primary,
title = {
Text(
text = "Sign Up",
color = MaterialTheme.colorScheme.onPrimary,
)
},
)
}
) { paddingValues ->
Column(
modifier = modifier
.padding(paddingValues)
.padding(20.dp)
) {
val email = viewModel.email.collectAsState(initial = "")
val password = viewModel.password.collectAsState()
OutlinedTextField(
label = {
Text(
text = "Email",
color = MaterialTheme.colorScheme.primary,
style = MaterialTheme.typography.titleMedium
)
},
maxLines = 1,
shape = RoundedCornerShape(32),
modifier = modifier.fillMaxWidth(),
value = email.value,
onValueChange = {
viewModel.onEmailChange(it)
},
)
OutlinedTextField(
label = {
Text(
text = "Password",
color = MaterialTheme.colorScheme.primary,
style = MaterialTheme.typography.titleMedium
)
},
maxLines = 1,
shape = RoundedCornerShape(32),
modifier = modifier
.fillMaxWidth()
.padding(top = 12.dp),
value = password.value,
onValueChange = {
viewModel.onPasswordChange(it)
},
)
val localSoftwareKeyboardController = LocalSoftwareKeyboardController.current
Button(modifier = modifier
.fillMaxWidth()
.padding(top = 12.dp),
onClick = {
localSoftwareKeyboardController?.hide()
viewModel.onSignUp()
coroutineScope.launch {
snackBarHostState.showSnackbar(
message = "Create account successfully. Sign in now!",
duration = SnackbarDuration.Long
)
}
}) {
Text("Sign up")
}
}
}
}
Create a SignInViewModel:
@HiltViewModel
class SignInViewModel @Inject constructor(
private val authenticationRepository: AuthenticationRepository
) : ViewModel() {
private val _email = MutableStateFlow("")
val email: Flow<String> = _email
private val _password = MutableStateFlow("")
val password = _password
fun onEmailChange(email: String) {
_email.value = email
}
fun onPasswordChange(password: String) {
_password.value = password
}
fun onSignIn() {
viewModelScope.launch {
authenticationRepository.signIn(
email = _email.value,
password = _password.value
)
}
}
fun onGoogleSignIn() {
viewModelScope.launch {
authenticationRepository.signInWithGoogle()
}
}
}
Create the SignInScreen.kt:
@OptIn(ExperimentalMaterial3Api::class, ExperimentalComposeUiApi::class)
@Composable
fun SignInScreen(
modifier: Modifier = Modifier,
navController: NavController,
viewModel: SignInViewModel = hiltViewModel()
) {
val snackBarHostState = remember { SnackbarHostState() }
val coroutineScope = rememberCoroutineScope()
Scaffold(
snackbarHost = { androidx.compose.material.SnackbarHost(snackBarHostState) },
topBar = {
TopAppBar(
navigationIcon = {
IconButton(onClick = {
navController.navigateUp()
}) {
Icon(
imageVector = Icons.Filled.ArrowBack,
contentDescription = null,
tint = MaterialTheme.colorScheme.onPrimary
)
}
},
backgroundColor = MaterialTheme.colorScheme.primary,
title = {
Text(
text = "Login",
color = MaterialTheme.colorScheme.onPrimary,
)
},
)
}
) { paddingValues ->
Column(
modifier = modifier
.padding(paddingValues)
.padding(20.dp)
) {
val email = viewModel.email.collectAsState(initial = "")
val password = viewModel.password.collectAsState()
androidx.compose.material.OutlinedTextField(
label = {
Text(
text = "Email",
color = MaterialTheme.colorScheme.primary,
style = MaterialTheme.typography.titleMedium
)
},
maxLines = 1,
shape = RoundedCornerShape(32),
modifier = modifier.fillMaxWidth(),
value = email.value,
onValueChange = {
viewModel.onEmailChange(it)
},
)
androidx.compose.material.OutlinedTextField(
label = {
Text(
text = "Password",
color = MaterialTheme.colorScheme.primary,
style = MaterialTheme.typography.titleMedium
)
},
maxLines = 1,
shape = RoundedCornerShape(32),
modifier = modifier
.fillMaxWidth()
.padding(top = 12.dp),
value = password.value,
onValueChange = {
viewModel.onPasswordChange(it)
},
)
val localSoftwareKeyboardController = LocalSoftwareKeyboardController.current
Button(modifier = modifier
.fillMaxWidth()
.padding(top = 12.dp),
onClick = {
localSoftwareKeyboardController?.hide()
viewModel.onGoogleSignIn()
}) {
Text("Sign in with Google")
}
Button(modifier = modifier
.fillMaxWidth()
.padding(top = 12.dp),
onClick = {
localSoftwareKeyboardController?.hide()
viewModel.onSignIn()
coroutineScope.launch {
snackBarHostState.showSnackbar(
message = "Sign in successfully !",
duration = SnackbarDuration.Long
)
}
}) {
Text("Sign in")
}
OutlinedButton(modifier = modifier
.fillMaxWidth()
.padding(top = 12.dp), onClick = {
navController.navigate(SignUpDestination.route)
}) {
Text("Sign up")
}
}
}
}
Implement the MainActivity#
In the MainActivity you created earlier, show your newly created screens:
@AndroidEntryPoint
class MainActivity : ComponentActivity() {
@Inject
lateinit var supabaseClient: SupabaseClient
@OptIn(ExperimentalMaterial3Api::class)
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
ManageProductsTheme {
// A surface container using the 'background' color from the theme
val navController = rememberNavController()
val currentBackStack by navController.currentBackStackEntryAsState()
val currentDestination = currentBackStack?.destination
Scaffold { innerPadding ->
NavHost(
navController,
startDestination = ProductListDestination.route,
Modifier.padding(innerPadding)
) {
composable(ProductListDestination.route) {
ProductListScreen(
navController = navController
)
}
composable(AuthenticationDestination.route) {
SignInScreen(
navController = navController
)
}
composable(SignUpDestination.route) {
SignUpScreen(
navController = navController
)
}
composable(AddProductDestination.route) {
AddProductScreen(
navController = navController
)
}
composable(
route = "${ProductDetailsDestination.route}/{${ProductDetailsDestination.productId}}",
arguments = ProductDetailsDestination.arguments
) { navBackStackEntry ->
val productId =
navBackStackEntry.arguments?.getString(ProductDetailsDestination.productId)
ProductDetailsScreen(
productId = productId,
navController = navController,
)
}
}
}
}
}
}
}
Create the success screen#
To handle OAuth and OTP signins, create a new activity to handle the deeplink you set in AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:name=".ManageProductApplication"
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:enableOnBackInvokedCallback="true"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/Theme.ManageProducts"
tools:targetApi="31">
<activity
android:name=".DeepLinkHandlerActivity"
android:exported="true"
android:theme="@style/Theme.ManageProducts" >
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:host="supabase.com"
android:scheme="app" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:exported="true"
android:label="@string/app_name"
android:theme="@style/Theme.ManageProducts">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Then create the DeepLinkHandlerActivity:
@AndroidEntryPoint
class DeepLinkHandlerActivity : ComponentActivity() {
@Inject
lateinit var supabaseClient: SupabaseClient
private lateinit var callback: (String, String) -> Unit
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
supabaseClient.handleDeeplinks(intent = intent,
onSessionSuccess = { userSession ->
Log.d("LOGIN", "Log in successfully with user info: ${userSession.user}")
userSession.user?.apply {
callback(email ?: "", createdAt.toString())
}
})
setContent {
val navController = rememberNavController()
val emailState = remember { mutableStateOf("") }
val createdAtState = remember { mutableStateOf("") }
LaunchedEffect(Unit) {
callback = { email, created ->
emailState.value = email
createdAtState.value = created
}
}
ManageProductsTheme {
Surface(
modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colorScheme.background
) {
SignInSuccessScreen(
modifier = Modifier.padding(20.dp),
navController = navController,
email = emailState.value,
createdAt = createdAtState.value,
onClick = { navigateToMainApp() }
)
}
}
}
}
private fun navigateToMainApp() {
val intent = Intent(this, MainActivity::class.java).apply {
flags = Intent.FLAG_ACTIVITY_CLEAR_TOP
}
startActivity(intent)
}
}