Im using very large data. And my app crashes. I need a solution that dont consumes a lot of memory and its still fast

Question

So, im using android studio to develop and app, and the most important data, have arrays with like 100 000 objects. What should i use to store this data. I get this data from a get request when user logs in. And i need to store that that while user is on the app. Ive tried using a global variable and then i tried with bundle&serializable. Booth didnt work, i had a problem out of memory.

What should i use instead?

My object type is somethin like this, and i need to store up to 200 000 of them.

String ID;
String Name;
String PVM;
String FinalName;
String SN;
Defect defect;

where defect is another class object.

Answer 1

Room Database is what you want, it is sqlite underneath, and very simple to use.

@Entity
data class MyModel(
@PrimaryKey
val ID: String,
val name: String,.....) {

@Dao
interface DaoMyModel {
//You put all methods to handle data here
// Some examples

@Insert
fun insertOne(item: MyModel)
@Insert
fun insertMultiple(items: List<MyModel>)

//Get all
@Query("SELECT * FROM MyModel")
fun getAll() : List<MyModel>

//Observe all with kotlin Flow
@Query("SELECT * FROM MyModel")
fun flowAll() : Flow<List<MyModel>>

}
} 


//Your database class
@Database(entities = [MyModel::class], version = 1)
abstract class MyDatabase: RoomDatabase(){
abstract fun getMyModelDao() : MyModel.DaoMyModel

}

//Db Init

fun provideDatabase(applicationContext: Context) = Room.databaseBuilder(
            applicationContext, MyDb::class.java , "MyDatabaseName")
        .build()



//handling the data

//get the database
val myDatabase = provideDatabase(context)
//get dao
val myModelDao = myDatabase.getMyModelDao()

//insert new item
myModelDao.insert(model)

I would suggest that you go tho with this 1 hour codelab tutorial https://developer.android.com/codelabs/android-room-with-a-view-kotlin#0