Mobile Apps 2023W Lecture 12 - Revision history

Soma: /* Notes */

2023-02-17T20:43:02Z

Notes

← Older revision		Revision as of 20:43, 17 February 2023
Line 9:		Line 9:

	* Create an empty Compose app at the latest API level, 33		* Create an empty Compose app at the latest API level, 33
	* In build.gradle (Project), add		* In build.gradle (Project), add <tt>room_version = '2.5.0'</tt> to the "ext" block at the top.
	room_version = '2.5.0'		* In build.gradle (Module)
	To the "ext" block at the top.		** add <tt>apply plugin: 'kotlin-kapt'</tt> after the plugin block
	* In build.gradle (Module), add		** add the following to the dependencies block:
			implementation "androidx.room:room-runtime:$room_version"
			implementation "androidx.room:room-ktx:$room_version"
			kapt "androidx.room:room-compiler:$room_version"

	==Code==		==Code==

Soma at 20:38, 17 February 2023

2023-02-17T20:38:49Z

← Older revision		Revision as of 20:38, 17 February 2023
Line 3:		Line 3:

	* [https://developer.android.com/codelabs/basic-android-kotlin-training-intro-room-flow#0 Rooms and Flow]		* [https://developer.android.com/codelabs/basic-android-kotlin-training-intro-room-flow#0 Rooms and Flow]

			==Notes==

			To get the ScrollDB app working, you need to (work in progress):

			* Create an empty Compose app at the latest API level, 33
			* In build.gradle (Project), add
			room_version = '2.5.0'
			To the "ext" block at the top.
			* In build.gradle (Module), add



	==Code==		==Code==

Soma at 19:49, 17 February 2023

2023-02-17T19:49:09Z

← Older revision		Revision as of 19:49, 17 February 2023
Line 1:		Line 1:

			==Resources==

			* [https://developer.android.com/codelabs/basic-android-kotlin-training-intro-room-flow#0 Rooms and Flow]

	==Code==		==Code==

Soma: Created page with " ==Code== package carleton.comp2601.scrolldemo import android.os.Bundle import androidx.activity.ComponentActivity import androidx.activity.compose.setContent import androidx.compose.foundation.layout.* import androidx.compose.foundation.lazy.LazyColumn import androidx.compose.foundation.lazy.rememberLazyListState import androidx.compose.material.* import androidx.compose.runtime.Composable import androidx.compose.ui.Alignment impor..."

2023-02-17T19:47:39Z

Created page with " ==Code== <syntaxhighlight lang="kotlin" line> package carleton.comp2601.scrolldemo import android.os.Bundle import androidx.activity.ComponentActivity import androidx.activity.compose.setContent import androidx.compose.foundation.layout.* import androidx.compose.foundation.lazy.LazyColumn import androidx.compose.foundation.lazy.rememberLazyListState import androidx.compose.material.* import androidx.compose.runtime.Composable import androidx.compose.ui.Alignment impor..."

New page

==Code==

<syntaxhighlight lang="kotlin" line>
package carleton.comp2601.scrolldemo

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.rememberLazyListState
import androidx.compose.material.*
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import carleton.comp2601.scrolldemo.database.AppDatabase
import carleton.comp2601.scrolldemo.ui.theme.ScrollDemoTheme

class MainActivity : ComponentActivity() {
//val database: AppDatabase by lazy { AppDatabase.getDatabase(this) }

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
ScrollDemoTheme {
// A surface container using the 'background' color from the theme
ScrollList()
//ScrollList(database)
}
}
}
}

@Composable
fun ScrollList() {
//fun ScrollList(database: AppDatabase) {

val listState = rememberLazyListState()

Surface(
modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colors.background
) {
Scaffold(
topBar = {
TopAppBar(
backgroundColor = MaterialTheme.colors.primary,
title = { Text("Scroll Demo") }
)
},
content = {
LazyColumn(
state = listState,
modifier = Modifier.fillMaxWidth(),
contentPadding = PaddingValues(16.dp),
verticalArrangement = Arrangement.spacedBy(16.dp),
) {
items(20000) { index ->
Text(text = "Item: $index")
}
}
}
)
}
}

//@Preview(showBackground = true)
//@Composable
//fun DefaultPreview() {
// ScrollDemoTheme {
// ScrollList()
// }
//}
</syntaxhighlight>