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ADD: Further Performance Improvements by storing a special preview image

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This commit is contained in:
Fawkes100 2025-04-29 20:54:00 +02:00
parent 0a33c12cde
commit dc5be58b30
3 changed files with 35 additions and 12 deletions
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3
app/src/main/java/come/stormborntales/notevault/data/local/entity/NoteEntity.kt
View File

@ -11,5 +11,6 @@ data class NoteEntity(
val composer: String?,
val year: Int?,
val genre: String?,
val description: String?
val description: String?,
val imagePreview: String
)

18
app/src/main/java/come/stormborntales/notevault/ui/screens/MainScreen.kt
View File

@ -57,22 +57,20 @@ fun NoteCard(note: NoteEntity) {
) {
Row(modifier = Modifier.padding(16.dp)) {
// Linkes Vorschaubild
note.images.firstOrNull()?.let { uriString ->
AsyncImage(
model = uriString,
contentDescription = "Vorschaubild",
modifier = Modifier
.size(120.dp)
.clip(RoundedCornerShape(12.dp))
)
}
AsyncImage(
model = note.imagePreview,
contentDescription = "Vorschaubild",
modifier = Modifier
.size(120.dp)
.clip(RoundedCornerShape(12.dp))
)
// Rechte Info-Spalte
Column(
modifier = Modifier
.weight(1f)
.align(Alignment.CenterVertically)
.padding(start=16.dp)
) {
Text(
text = note.title,

26
app/src/main/java/come/stormborntales/notevault/ui/viewmodel/NoteViewModel.kt
View File

@ -1,6 +1,8 @@
package come.stormborntales.notevault.ui.viewmodel
import android.content.Context
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.net.Uri
import android.util.Log
import android.webkit.MimeTypeMap
@ -12,12 +14,31 @@ import come.stormborntales.notevault.data.repository.NoteRepository
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import java.io.File
import java.io.InputStream
import androidx.core.graphics.scale
class NoteViewModel(
private val repository: NoteRepository,
) : ViewModel() {
val notes = repository.allNotes.asLiveData()
fun createPreviewImage(context: Context, uri: Uri): File? {
return try {
val inputStream = context.contentResolver.openInputStream(uri)
val originalBitmap = BitmapFactory.decodeStream(inputStream) ?: return null
val previewBitmap = originalBitmap.scale(128, 128, false)
val previewFile = File(context.filesDir, "preview_${System.currentTimeMillis()}.jpg")
previewFile.outputStream().use { out ->
previewBitmap.compress(Bitmap.CompressFormat.JPEG, 75, out)
}
previewFile
} catch (e: Exception) {
e.printStackTrace()
null
}
}
fun addNote(context: Context, title: String, composer: String?, year: Int?, genre: String?, description: String?, selectedUris: List<Uri>, onDone:() -> Unit) {
viewModelScope.launch(Dispatchers.IO) {
val copiedUris = selectedUris.mapNotNull { uri ->
@ -41,13 +62,16 @@ class NoteViewModel(
}
if (copiedUris.isNotEmpty()) {
val preview_image_path = createPreviewImage(context, uri = selectedUris[0])
val note = NoteEntity(
title = title,
images = copiedUris, // muss als List<String> gespeichert sein
composer = composer,
year = year,
genre = genre,
description = description
description = description,
imagePreview = preview_image_path.toString()
)
repository.insert(note)