com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException - json

Question

I am facing such an error in my application. I guess the problem is due to having char in note_title and note_desc. I couldn't find the solution. Is there anyone who can help?
navgraph
error
NoteDetailScreen
notes entity
? and other char cause error
I tried change note_title and note_desc types but didnt work.

Answer 1

I solved this way;
Let’s say you have a class like this:
#Parcalize
#Entity(tableName = "NOTES")
data class Notes(
#PrimaryKey(autoGenerate = true)
#ColumnInfo("note_id") #NotNull var note_id:Int,
#ColumnInfo("note_title") #NotNull var note_title: String,
#ColumnInfo("note_desc") #NotNull var note_desc: String,
#ColumnInfo("note_date") #Nullable var note_date: String?
): Parcelable {
constructor(parcel: Parcel) : this(
parcel.readInt(),
parcel.readString().toString(),
parcel.readString().toString(),
parcel.readString()
) {
}
override fun writeToParcel(parcel: Parcel, flags: Int) {
parcel.writeInt(note_id)
parcel.writeString(note_title)
parcel.writeString(note_desc)
parcel.writeString(note_date)
}
override fun describeContents(): Int {
return 0
}
companion object CREATOR : Parcelable.Creator<Notes> {
override fun createFromParcel(parcel: Parcel): Notes {
return Notes(parcel)
}
override fun newArray(size: Int): Array<Notes?> {
return arrayOfNulls(size)
}
}
}
annotation class Parcalize
You can define the NavType like this:
class NavTypo : NavType<Notes>(isNullableAllowed = false) {
override fun get(bundle: Bundle, key: String): Notes? {
return bundle.getParcelable(key)
}
override fun parseValue(value: String): Notes {
return Gson().fromJson(value, Notes::class.java)
}
override fun put(bundle: Bundle, key: String, value: Notes) {
bundle.putParcelable(key, value)
}
}
And use it:
composable(
"note_details_page/{note_id}",
arguments = listOf(
navArgument("note_id"){
type = NavTypo()
}
)
){
val note = it.arguments?.getParcelable<Notes>("note_id")
if (note != null) {
NoteDetailScreen(note, navController)
}
}
Card(
backgroundColor = choosedColor,
modifier = Modifier
.padding(3.dp)
.sizeIn(maxHeight = 250.dp)
.combinedClickable(onClick={
val note = allNotes.value!![it]
val noteJson = Uri.encode(Gson().toJson(note))
navController.navigate("note_details_page/${noteJson}")
}