Created a new TransferDetail model and DAO to create a object composed form the transfers, assets, accounts, and equivalent_values db tables and used such classes to correctly show the accounts involved in transactions in the BalancesFragment.

app/src/main/java/cy/agorise/bitsybitshareswallet/adapters/TransfersAdapter.kt

@@ -11,16 +11,16 @@ import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.recyclerview.widget.RecyclerView
 import androidx.recyclerview.widget.SortedList
 import cy.agorise.bitsybitshareswallet.R
-import cy.agorise.bitsybitshareswallet.database.entities.Transfer
+import cy.agorise.bitsybitshareswallet.database.joins.TransferDetail
 
-class TransactionsAdapter(private val context: Context) :
+class TransfersAdapter(private val context: Context) :
-    RecyclerView.Adapter<TransactionsAdapter.ViewHolder>() {
+    RecyclerView.Adapter<TransfersAdapter.ViewHolder>() {
 
     private val mComparator =
-        Comparator<Transfer> { a, b -> a.id.compareTo(b.id) }
+        Comparator<TransferDetail> { a, b -> a.id.compareTo(b.id) }
 
     private val mSortedList =
-        SortedList<Transfer>(Transfer::class.java, object : SortedList.Callback<Transfer>() {
+        SortedList<TransferDetail>(TransferDetail::class.java, object : SortedList.Callback<TransferDetail>() {
             override fun onInserted(position: Int, count: Int) {
                 notifyItemRangeInserted(position, count)
             }
@@ -37,15 +37,15 @@ class TransactionsAdapter(private val context: Context) :
                 notifyItemRangeChanged(position, count)
             }
 
-            override fun compare(a: Transfer, b: Transfer): Int {
+            override fun compare(a: TransferDetail, b: TransferDetail): Int {
                 return mComparator.compare(a, b)
             }
 
-            override fun areContentsTheSame(oldItem: Transfer, newItem: Transfer): Boolean {
+            override fun areContentsTheSame(oldItem: TransferDetail, newItem: TransferDetail): Boolean {
                 return oldItem == newItem
             }
 
-            override fun areItemsTheSame(item1: Transfer, item2: Transfer): Boolean {
+            override fun areItemsTheSame(item1: TransferDetail, item2: TransferDetail): Boolean {
                 return item1.id == item2.id
             }
         })
@@ -64,7 +64,7 @@ class TransactionsAdapter(private val context: Context) :
         val tvFiatEquivalent: TextView  = itemView.findViewById(R.id.tvFiatEquivalent)
     }
 
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TransactionsAdapter.ViewHolder {
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TransfersAdapter.ViewHolder {
         val inflater = LayoutInflater.from(context)
 
         val transactionView = inflater.inflate(R.layout.item_transaction, parent, false)
@@ -73,41 +73,41 @@ class TransactionsAdapter(private val context: Context) :
     }
 
     override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) {
-        val transaction = mSortedList.get(position)
+        val transferDetail = mSortedList.get(position)
 
-        viewHolder.tvFrom.text = transaction.source
+        viewHolder.tvFrom.text = transferDetail.from
-        viewHolder.tvTo.text = transaction.destination
+        viewHolder.tvTo.text = transferDetail.to
     }
 
-    fun add(transaction: Transfer) {
+    fun add(transferDetail: TransferDetail) {
-        mSortedList.add(transaction)
+        mSortedList.add(transferDetail)
     }
 
-    fun remove(transaction: Transfer) {
+    fun remove(transferDetail: TransferDetail) {
-        mSortedList.remove(transaction)
+        mSortedList.remove(transferDetail)
     }
 
-    fun add(transactions: List<Transfer>) {
+    fun add(transfersDetails: List<TransferDetail>) {
-        mSortedList.addAll(transactions)
+        mSortedList.addAll(transfersDetails)
     }
 
-    fun remove(transactions: List<Transfer>) {
+    fun remove(transfersDetails: List<TransferDetail>) {
         mSortedList.beginBatchedUpdates()
-        for (transaction in transactions) {
+        for (transferDetail in transfersDetails) {
-            mSortedList.remove(transaction)
+            mSortedList.remove(transferDetail)
         }
         mSortedList.endBatchedUpdates()
     }
 
-    fun replaceAll(transactions: List<Transfer>) {
+    fun replaceAll(transfersDetails: List<TransferDetail>) {
         mSortedList.beginBatchedUpdates()
         for (i in mSortedList.size() - 1 downTo 0) {
-            val transaction = mSortedList.get(i)
+            val transferDetail = mSortedList.get(i)
-            if (!transactions.contains(transaction)) {
+            if (!transfersDetails.contains(transferDetail)) {
-                mSortedList.remove(transaction)
+                mSortedList.remove(transferDetail)
             }
         }
-        mSortedList.addAll(transactions)
+        mSortedList.addAll(transfersDetails)
         mSortedList.endBatchedUpdates()
     }
 

app/src/main/java/cy/agorise/bitsybitshareswallet/database/BitsyDatabase.kt

@@ -6,8 +6,8 @@ import androidx.room.Room
 import androidx.room.RoomDatabase
 import cy.agorise.bitsybitshareswallet.database.daos.*
 import cy.agorise.bitsybitshareswallet.database.entities.*
-import cy.agorise.bitsybitshareswallet.database.joins.BalanceDetail
 import cy.agorise.bitsybitshareswallet.database.joins.BalanceDetailDao
+import cy.agorise.bitsybitshareswallet.database.joins.TransferDetailDao
 
 @Database(entities = [
         Asset::class,
@@ -27,6 +27,7 @@ abstract class BitsyDatabase : RoomDatabase() {
     abstract fun transferDao(): TransferDao
     abstract fun userAccountDao(): UserAccountDao
     abstract fun balanceDetailDao(): BalanceDetailDao
+    abstract fun transferDetailDao(): TransferDetailDao
 
     companion object {
 

app/src/main/java/cy/agorise/bitsybitshareswallet/database/joins/TransferDetail.kt

@@ -0,0 +1,14 @@
+package cy.agorise.bitsybitshareswallet.database.joins
+
+data class TransferDetail(
+    val id: String,
+    val from: String,
+    val to: String
+//    val direction: Boolean, // True -> Received, False -> Sent
+//    val date: Long,
+//    val cryptoAmount: Long,
+//    val cryptoPrecision: Int,
+//    val cryptoSymbol: String,
+//    val fiatAmount: Long,
+//    val fiatCurrency: String
+)

app/src/main/java/cy/agorise/bitsybitshareswallet/database/joins/TransferDetailDao.kt

@@ -0,0 +1,12 @@
+package cy.agorise.bitsybitshareswallet.database.joins
+
+import androidx.lifecycle.LiveData
+import androidx.room.Dao
+import androidx.room.Query
+
+@Dao
+interface TransferDetailDao {
+
+    @Query("SELECT id, IFNULL((SELECT name FROM user_accounts WHERE user_accounts.id=transfers.source), '') AS `from`, IFNULL((SELECT name FROM user_accounts WHERE user_accounts.id=transfers.destination), '') AS `to` FROM transfers")
+    fun getAll(): LiveData<List<TransferDetail>>
+}

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/BalancesFragment.kt

@@ -13,13 +13,13 @@ import androidx.recyclerview.widget.LinearLayoutManager
 
 import cy.agorise.bitsybitshareswallet.R
 import cy.agorise.bitsybitshareswallet.adapters.BalancesAdapter
-import cy.agorise.bitsybitshareswallet.adapters.TransactionsAdapter
+import cy.agorise.bitsybitshareswallet.adapters.TransfersAdapter
-import cy.agorise.bitsybitshareswallet.database.entities.Transfer
 import cy.agorise.bitsybitshareswallet.database.entities.UserAccount
 import cy.agorise.bitsybitshareswallet.database.joins.BalanceDetail
+import cy.agorise.bitsybitshareswallet.database.joins.TransferDetail
 import cy.agorise.bitsybitshareswallet.utils.Constants
 import cy.agorise.bitsybitshareswallet.viewmodels.BalanceDetailViewModel
-import cy.agorise.bitsybitshareswallet.viewmodels.TransactionViewModel
+import cy.agorise.bitsybitshareswallet.viewmodels.TransferDetailViewModel
 import cy.agorise.bitsybitshareswallet.viewmodels.UserAccountViewModel
 import kotlinx.android.synthetic.main.fragment_balances.*
 
@@ -27,7 +27,7 @@ class BalancesFragment : Fragment() {
 
     private lateinit var mUserAccountViewModel: UserAccountViewModel
     private lateinit var mBalanceDetailViewModel: BalanceDetailViewModel
-    private lateinit var mTransactionViewModel: TransactionViewModel
+    private lateinit var mTransferDetailViewModel: TransferDetailViewModel
 
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
@@ -60,15 +60,15 @@ class BalancesFragment : Fragment() {
             balancesAdapter.replaceAll(balancesDetails)
         })
 
-        // Configure TransactionViewModel to show the transaction history
+        // Configure TransferDetailViewModel to show the transaction history
-        mTransactionViewModel = ViewModelProviders.of(this).get(TransactionViewModel::class.java)
+        mTransferDetailViewModel = ViewModelProviders.of(this).get(TransferDetailViewModel::class.java)
 
-        val transactionsAdapter = TransactionsAdapter(context!!)
+        val transfersAdapter = TransfersAdapter(context!!)
-        rvTransactions.adapter = transactionsAdapter
+        rvTransactions.adapter = transfersAdapter
         rvTransactions.layoutManager = LinearLayoutManager(context)
 
-        mTransactionViewModel.getAll().observe(this, Observer<List<Transfer>> { transfers ->
+        mTransferDetailViewModel.getAll().observe(this, Observer<List<TransferDetail>> { transfersDetails ->
-            transactionsAdapter.replaceAll(transfers)
+            transfersAdapter.replaceAll(transfersDetails)
         })
     }
 }

app/src/main/java/cy/agorise/bitsybitshareswallet/repositories/TransferDetailRepository.kt

@@ -0,0 +1,22 @@
+package cy.agorise.bitsybitshareswallet.repositories
+
+import android.content.Context
+import androidx.lifecycle.LiveData
+import cy.agorise.bitsybitshareswallet.database.BitsyDatabase
+import cy.agorise.bitsybitshareswallet.database.joins.TransferDetail
+import cy.agorise.bitsybitshareswallet.database.joins.TransferDetailDao
+
+class TransferDetailRepository internal constructor(context: Context) {
+
+    private val mTransferDetailDao: TransferDetailDao
+
+    init {
+        val db = BitsyDatabase.getDatabase(context)
+        mTransferDetailDao = db!!.transferDetailDao()
+    }
+
+    fun getAll(): LiveData<List<TransferDetail>> {
+        return mTransferDetailDao.getAll()
+    }
+
+}

app/src/main/java/cy/agorise/bitsybitshareswallet/viewmodels/TransactionViewModel.kt

@@ -1,15 +0,0 @@
-package cy.agorise.bitsybitshareswallet.viewmodels
-
-import android.app.Application
-import androidx.lifecycle.AndroidViewModel
-import androidx.lifecycle.LiveData
-import cy.agorise.bitsybitshareswallet.database.entities.Transfer
-import cy.agorise.bitsybitshareswallet.repositories.TransferRepository
-
-class TransactionViewModel(application: Application) : AndroidViewModel(application) {
-    private var mRepository = TransferRepository(application)
-
-    internal fun getAll(): LiveData<List<Transfer>> {
-        return mRepository.getAll()
-    }
-}

app/src/main/java/cy/agorise/bitsybitshareswallet/viewmodels/TransferDetailViewModel.kt

@@ -0,0 +1,15 @@
+package cy.agorise.bitsybitshareswallet.viewmodels
+
+import android.app.Application
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.LiveData
+import cy.agorise.bitsybitshareswallet.database.joins.TransferDetail
+import cy.agorise.bitsybitshareswallet.repositories.TransferDetailRepository
+
+class TransferDetailViewModel(application: Application) : AndroidViewModel(application) {
+    private var mRepository = TransferDetailRepository(application)
+
+    internal fun getAll(): LiveData<List<TransferDetail>> {
+        return mRepository.getAll()
+    }
+}