Adding compose code for FCM #1632
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| Original file line number | Diff line number | Diff line change |
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| package com.google.firebase.quickstart.fcm.kotlin | ||
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| import android.app.Activity | ||
| import android.content.Context | ||
| import android.content.ContextWrapper | ||
| import android.os.Build | ||
| import android.os.Bundle | ||
| import androidx.activity.ComponentActivity | ||
| import androidx.activity.compose.rememberLauncherForActivityResult | ||
| import androidx.activity.compose.setContent | ||
| import androidx.activity.result.contract.ActivityResultContracts | ||
| import androidx.compose.foundation.Image | ||
| import androidx.compose.foundation.layout.Arrangement | ||
| import androidx.compose.foundation.layout.Column | ||
| import androidx.compose.foundation.layout.fillMaxSize | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.foundation.layout.width | ||
| import androidx.compose.foundation.layout.wrapContentHeight | ||
| import androidx.compose.material.Button | ||
| import androidx.compose.material.ButtonDefaults | ||
| import androidx.compose.material.MaterialTheme | ||
| import androidx.compose.material.Scaffold | ||
| import androidx.compose.material.SnackbarHost | ||
| import androidx.compose.material.SnackbarHostState | ||
| import androidx.compose.material.Surface | ||
| import androidx.compose.material.Text | ||
| import androidx.compose.material.TopAppBar | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.DisposableEffect | ||
| import androidx.compose.runtime.LaunchedEffect | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.runtime.rememberCoroutineScope | ||
| import androidx.compose.ui.Alignment | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.platform.LocalContext | ||
| import androidx.compose.ui.platform.LocalLifecycleOwner | ||
| import androidx.compose.ui.res.colorResource | ||
| import androidx.compose.ui.res.painterResource | ||
| import androidx.compose.ui.res.stringResource | ||
| import androidx.compose.ui.text.style.TextAlign | ||
| import androidx.compose.ui.tooling.preview.Preview | ||
| import androidx.compose.ui.unit.dp | ||
| import androidx.lifecycle.Lifecycle | ||
| import androidx.lifecycle.LifecycleEventObserver | ||
| import androidx.lifecycle.LifecycleOwner | ||
| import androidx.lifecycle.viewmodel.compose.viewModel | ||
| import com.google.firebase.quickstart.fcm.R | ||
| import com.google.firebase.quickstart.fcm.kotlin.data.SubscriptionState | ||
| import com.google.firebase.quickstart.fcm.kotlin.ui.theme.FirebaseMessagingTheme | ||
| import kotlinx.coroutines.launch | ||
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| class ComposeMainActivity : ComponentActivity() { | ||
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| override fun onCreate(savedInstanceState: Bundle?) { | ||
| super.onCreate(savedInstanceState) | ||
| setContent { | ||
| FirebaseMessagingTheme { | ||
| // A surface container using the 'background' color from the theme | ||
| Surface( | ||
| modifier = Modifier.fillMaxSize(), | ||
| color = MaterialTheme.colors.background | ||
| ) { | ||
| MainScreen() | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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||
| @Composable | ||
| fun MainScreen( | ||
| lifecycleOwner: LifecycleOwner = LocalLifecycleOwner.current, | ||
| fcmViewModel: FirebaseMessagingViewModel = viewModel(factory = FirebaseMessagingViewModel.Factory) | ||
| ) { | ||
| val context = LocalContext.current | ||
| val scope = rememberCoroutineScope() | ||
| val snackbarHostState = remember { SnackbarHostState() } | ||
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| val activity = context.findActivity() | ||
| val intent = activity?.intent | ||
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| val requestPermissionLauncher = rememberLauncherForActivityResult( | ||
| ActivityResultContracts.RequestPermission() | ||
| ) { isGranted -> | ||
| var message = context.getString(R.string.msg_permission_granted) | ||
| if (!isGranted) { | ||
| message = context.getString(R.string.msg_permission_failed) | ||
| } | ||
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| scope.launch { | ||
| snackbarHostState.showSnackbar(message) | ||
| } | ||
| } | ||
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| DisposableEffect(lifecycleOwner) { | ||
| val observer = LifecycleEventObserver { _, event -> | ||
| if (event == Lifecycle.Event.ON_CREATE) { | ||
| //Create Notification Channel | ||
| if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { | ||
| fcmViewModel.setNotificationChannel( | ||
| context, | ||
| context.getString(R.string.default_notification_channel_id), | ||
| context.getString(R.string.default_notification_channel_name) | ||
| ) | ||
| } | ||
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| intent?.let { intentData -> | ||
| fcmViewModel.logNotificationData(intentData) | ||
| } | ||
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| scope.launch { | ||
| snackbarHostState.showSnackbar(context.getString(R.string.msg_setup_readme_instructions)) | ||
| } | ||
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| fcmViewModel.askNotificationPermission(context, requestPermissionLauncher) | ||
| } | ||
| } | ||
|
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| lifecycleOwner.lifecycle.addObserver(observer) | ||
|
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| onDispose { | ||
| lifecycleOwner.lifecycle.removeObserver(observer) | ||
| } | ||
| } | ||
|
Comment on lines
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There was a problem hiding this comment. Using LaunchedEffect(Unit) {
//Create Notification Channel
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
fcmViewModel.setNotificationChannel(
context,
context.getString(R.string.default_notification_channel_id),
context.getString(R.string.default_notification_channel_name)
)
}
intent?.let { intentData ->
fcmViewModel.logNotificationData(intentData)
}
snackbarHostState.showSnackbar(context.getString(R.string.msg_setup_readme_instructions))
fcmViewModel.askNotificationPermission(context, requestPermissionLauncher)
} |
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| LaunchedEffect(fcmViewModel.token) { | ||
| fcmViewModel.token.collect { | ||
| if(it.isNotEmpty()) { | ||
| snackbarHostState.showSnackbar(context.getString(R.string.msg_token_fmt, it)) | ||
| } | ||
| } | ||
| } | ||
|
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| LaunchedEffect(fcmViewModel.subscriptionState) { | ||
| fcmViewModel.subscriptionState.collect { state -> | ||
| when (state) { | ||
| SubscriptionState.Success -> { snackbarHostState.showSnackbar(context.getString(R.string.msg_subscribed)) } | ||
| SubscriptionState.Failed -> { snackbarHostState.showSnackbar(context.getString(R.string.msg_subscribe_failed)) } | ||
| SubscriptionState.Loading -> { } | ||
| } | ||
| } | ||
| } | ||
|
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| Scaffold( | ||
| snackbarHost = { | ||
| SnackbarHost(hostState = snackbarHostState) | ||
| }, | ||
| modifier = Modifier | ||
| .fillMaxSize(), | ||
| topBar = { | ||
| TopAppBar( | ||
| backgroundColor = colorResource(R.color.colorPrimary) | ||
|
There was a problem hiding this comment. The backgroundColor = MaterialTheme.colors.primary |
||
| ) { | ||
| Text( | ||
| text = stringResource(R.string.app_name), | ||
| style = MaterialTheme.typography.h6, | ||
| textAlign = TextAlign.Center, | ||
| modifier = Modifier.padding(8.dp), | ||
| color = Color.White | ||
| ) | ||
| } | ||
| }, | ||
| content = { innerPadding -> | ||
| Column( | ||
| modifier = Modifier | ||
| .fillMaxSize() | ||
| .padding(innerPadding) | ||
| ) { | ||
| MainContent(fcmViewModel) | ||
| } | ||
| } | ||
| ) | ||
| } | ||
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| @Composable | ||
| fun MainContent( | ||
| fcmViewModel: FirebaseMessagingViewModel | ||
| ) { | ||
| Column( | ||
| modifier = Modifier | ||
| .fillMaxSize() | ||
| .padding(16.dp), | ||
| verticalArrangement = Arrangement.Top, | ||
| horizontalAlignment = Alignment.CenterHorizontally | ||
| ) { | ||
| Image( | ||
| painter = painterResource(R.drawable.firebase_lockup_400), | ||
| contentDescription = "Firebase logo", | ||
| modifier = Modifier.fillMaxWidth(), | ||
| ) | ||
| Text( | ||
| text = stringResource(R.string.quickstart_message), | ||
| textAlign = TextAlign.Center, | ||
| style = MaterialTheme.typography.body1, | ||
| modifier = Modifier | ||
| .padding(top = 16.dp, start=8.dp, end=8.dp, bottom=16.dp) | ||
| ) | ||
| Button( | ||
| modifier = Modifier | ||
| .width(200.dp) | ||
| .wrapContentHeight() | ||
| .padding(0.dp, 20.dp, 0.dp, 0.dp), | ||
| colors = ButtonDefaults.buttonColors(backgroundColor = colorResource(R.color.colorPrimary)), | ||
|
There was a problem hiding this comment. The colors = ButtonDefaults.buttonColors(backgroundColor = MaterialTheme.colors.primary), |
||
| onClick = { | ||
| fcmViewModel.subscribeToTopic("weather") | ||
| } | ||
| ) { | ||
| Text( | ||
| textAlign = TextAlign.Center, | ||
| text = stringResource(R.string.subscribe_to_weather).uppercase(), | ||
| color = Color.White, | ||
| ) | ||
| } | ||
| Button( | ||
| modifier = Modifier | ||
| .width(200.dp) | ||
| .wrapContentHeight() | ||
| .padding(0.dp, 20.dp, 0.dp, 0.dp), | ||
| colors = ButtonDefaults.buttonColors(backgroundColor = colorResource(R.color.colorPrimary)), | ||
| onClick = { | ||
| fcmViewModel.getToken() | ||
| } | ||
| ) { | ||
| Text( | ||
| text = stringResource(R.string.log_token).uppercase(), | ||
| color = Color.White, | ||
| ) | ||
| } | ||
| } | ||
| } | ||
|
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| @Preview(showBackground = true) | ||
| @Composable | ||
| fun MainAppViewPreview() { | ||
| FirebaseMessagingTheme { | ||
| MainScreen() | ||
| } | ||
|
Comment on lines
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There was a problem hiding this comment. This preview will likely crash because |
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| } | ||
|
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| fun Context.findActivity(): Activity? = when (this) { | ||
| is Activity -> this | ||
| is ContextWrapper -> baseContext.findActivity() | ||
| else -> null | ||
| } | ||
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The
messagevariable is assigned once and never changed within its scope. It can be declared as avalusing anif-elseexpression, which is better for readability and immutability.