Created a new BalancesDetail model and DAO to create a object composed form the balances and assets db tables and used such classes to correctly show the balances in the BalancesFragment.

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

@@ -8,16 +8,16 @@ import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
 import androidx.recyclerview.widget.SortedList
 import cy.agorise.bitsybitshareswallet.R
-import cy.agorise.bitsybitshareswallet.database.entities.Balance
+import cy.agorise.bitsybitshareswallet.database.joins.BalanceDetail
 
 class BalancesAdapter(private val context: Context) :
     RecyclerView.Adapter<BalancesAdapter.ViewHolder>() {
 
     private val mComparator =
-        Comparator<Balance> { a, b -> a.assetId.compareTo(b.assetId) }
+        Comparator<BalanceDetail> { a, b -> a.symbol.compareTo(b.symbol) }
 
     private val mSortedList =
-        SortedList<Balance>(Balance::class.java, object : SortedList.Callback<Balance>() {
+        SortedList<BalanceDetail>(BalanceDetail::class.java, object : SortedList.Callback<BalanceDetail>() {
             override fun onInserted(position: Int, count: Int) {
                 notifyItemRangeInserted(position, count)
             }
@@ -34,16 +34,16 @@ class BalancesAdapter(private val context: Context) :
                 notifyItemRangeChanged(position, count)
             }
 
-            override fun compare(a: Balance, b: Balance): Int {
+            override fun compare(a: BalanceDetail, b: BalanceDetail): Int {
                 return mComparator.compare(a, b)
             }
 
-            override fun areContentsTheSame(oldItem: Balance, newItem: Balance): Boolean {
+            override fun areContentsTheSame(oldItem: BalanceDetail, newItem: BalanceDetail): Boolean {
                 return oldItem == newItem
             }
 
-            override fun areItemsTheSame(item1: Balance, item2: Balance): Boolean {
+            override fun areItemsTheSame(item1: BalanceDetail, item2: BalanceDetail): Boolean {
-                return item1.assetId == item2.assetId
+                return item1.id == item2.id
             }
         })
 
@@ -62,23 +62,25 @@ class BalancesAdapter(private val context: Context) :
     override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) {
         val balance = mSortedList.get(position)
 
-        val amount = "${balance.assetAmount} ${balance.assetId}"
+        val amount = balance.amount.toDouble() / Math.pow(10.0, balance.precision.toDouble())
-        viewHolder.tvBalance.text = amount
+
+        viewHolder.tvBalance.text =
+                String.format("%." + Math.min(balance.precision, 8) + "f %s", amount, balance.symbol)
     }
 
-    fun add(balance: Balance) {
+    fun add(balance: BalanceDetail) {
         mSortedList.add(balance)
     }
 
-    fun remove(balance: Balance) {
+    fun remove(balance: BalanceDetail) {
         mSortedList.remove(balance)
     }
 
-    fun add(balances: List<Balance>) {
+    fun add(balances: List<BalanceDetail>) {
         mSortedList.addAll(balances)
     }
 
-    fun remove(balances: List<Balance>) {
+    fun remove(balances: List<BalanceDetail>) {
         mSortedList.beginBatchedUpdates()
         for (balance in balances) {
             mSortedList.remove(balance)
@@ -86,7 +88,7 @@ class BalancesAdapter(private val context: Context) :
         mSortedList.endBatchedUpdates()
     }
 
-    fun replaceAll(balances: List<Balance>) {
+    fun replaceAll(balances: List<BalanceDetail>) {
         mSortedList.beginBatchedUpdates()
         for (i in mSortedList.size() - 1 downTo 0) {
             val balance = mSortedList.get(i)

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

@@ -6,6 +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
 
 @Database(entities = [
         Asset::class,
@@ -24,6 +26,7 @@ abstract class BitsyDatabase : RoomDatabase() {
     abstract fun equivalentValueDao(): EquivalentValueDao
     abstract fun transferDao(): TransferDao
     abstract fun userAccountDao(): UserAccountDao
+    abstract fun balanceDetailDao(): BalanceDetailDao
 
     companion object {
 

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

@@ -0,0 +1,8 @@
+package cy.agorise.bitsybitshareswallet.database.joins
+
+data class BalanceDetail(
+    val id: String,
+    val amount: Long,
+    val precision: Int,
+    val symbol: String
+)

app/src/main/java/cy/agorise/bitsybitshareswallet/database/joins/BalanceDetailDao.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 BalanceDetailDao {
+    @Query("SELECT assets.id AS id, balances.asset_amount AS amount, assets.precision, assets.symbol " +
+            "FROM balances INNER JOIN assets on balances.asset_id = assets.id")
+    fun getAll(): LiveData<List<BalanceDetail>>
+}

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

@@ -14,11 +14,11 @@ 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.database.entities.Balance
 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.utils.Constants
-import cy.agorise.bitsybitshareswallet.viewmodels.BalanceViewModel
+import cy.agorise.bitsybitshareswallet.viewmodels.BalanceDetailViewModel
 import cy.agorise.bitsybitshareswallet.viewmodels.TransactionViewModel
 import cy.agorise.bitsybitshareswallet.viewmodels.UserAccountViewModel
 import kotlinx.android.synthetic.main.fragment_balances.*
@@ -26,7 +26,7 @@ import kotlinx.android.synthetic.main.fragment_balances.*
 class BalancesFragment : Fragment() {
 
     private lateinit var mUserAccountViewModel: UserAccountViewModel
-    private lateinit var mBalanceViewModel: BalanceViewModel
+    private lateinit var mBalanceDetailViewModel: BalanceDetailViewModel
     private lateinit var mTransactionViewModel: TransactionViewModel
 
     override fun onCreateView(
@@ -49,15 +49,15 @@ class BalancesFragment : Fragment() {
             tvAccountName.text = user.name
         })
 
-        // Configure BalanceViewModel to show the current balances
+        // Configure BalanceDetailViewModel to show the current balances
-        mBalanceViewModel = ViewModelProviders.of(this).get(BalanceViewModel::class.java)
+        mBalanceDetailViewModel = ViewModelProviders.of(this).get(BalanceDetailViewModel::class.java)
 
         val balancesAdapter = BalancesAdapter(context!!)
         rvBalances.adapter = balancesAdapter
         rvBalances.layoutManager = GridLayoutManager(context, 2)
 
-        mBalanceViewModel.getAll().observe(this, Observer<List<Balance>> { balances ->
+        mBalanceDetailViewModel.getAll().observe(this, Observer<List<BalanceDetail>> { balancesDetails ->
-            balancesAdapter.replaceAll(balances)
+            balancesAdapter.replaceAll(balancesDetails)
         })
 
         // Configure TransactionViewModel to show the transaction history

app/src/main/java/cy/agorise/bitsybitshareswallet/repositories/BalanceDetailRepository.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.BalanceDetail
+import cy.agorise.bitsybitshareswallet.database.joins.BalanceDetailDao
+
+class BalanceDetailRepository internal constructor(context: Context) {
+
+    private val mBalanceDetailDao: BalanceDetailDao
+
+    init {
+        val db = BitsyDatabase.getDatabase(context)
+        mBalanceDetailDao = db!!.balanceDetailDao()
+    }
+
+    fun getAll(): LiveData<List<BalanceDetail>> {
+        return mBalanceDetailDao.getAll()
+    }
+
+}

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

@@ -0,0 +1,16 @@
+package cy.agorise.bitsybitshareswallet.viewmodels
+
+import android.app.Application
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.LiveData
+import cy.agorise.bitsybitshareswallet.database.joins.BalanceDetail
+import cy.agorise.bitsybitshareswallet.repositories.BalanceDetailRepository
+
+
+class BalanceDetailViewModel(application: Application) : AndroidViewModel(application) {
+    private var mRepository = BalanceDetailRepository(application)
+
+    internal fun getAll(): LiveData<List<BalanceDetail>> {
+        return mRepository.getAll()
+    }
+}

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

@@ -1,16 +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.Balance
-import cy.agorise.bitsybitshareswallet.repositories.BalanceRepository
-
-
-class BalanceViewModel(application: Application) : AndroidViewModel(application) {
-    private var mRepository = BalanceRepository(application)
-
-    internal fun getAll(): LiveData<List<Balance>> {
-        return mRepository.getAll()
-    }
-}