- Modified the Asset entity model by adding a method 'toString()', so that it can be used in the adapter for the ReceiveTransactionFragment's Asset AutoCompleteTextView.

- Created AssetViewModel to obtain the the elements from the assetd db table using the AssetRepository and serving the obtained assets to the ReceiveTransactionFragment.
- Fire an event to update the QR code when the user selects an asset from the AutoCompleteTextView.

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

@@ -10,7 +10,7 @@ import cy.agorise.bitsybitshareswallet.database.joins.BalanceDetail
 
 
 
-class AssetsAdapter(context: Context, resource: Int, data: List<BalanceDetail>) :
+class BalancesDetailsAdapter(context: Context, resource: Int, data: List<BalanceDetail>) :
     ArrayAdapter<BalanceDetail>(context, resource, data) {
 
     override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {

app/src/main/java/cy/agorise/bitsybitshareswallet/database/daos/AssetDao.kt

@@ -16,5 +16,5 @@ interface AssetDao {
     fun insertAll(assets: List<Asset>)
 
     @Query("SELECT * FROM assets")
-    fun getAllAssets(): LiveData<List<Asset>>
+    fun getAll(): LiveData<List<Asset>>
 }

app/src/main/java/cy/agorise/bitsybitshareswallet/database/entities/Asset.kt

@@ -12,4 +12,8 @@ data class Asset(
     @ColumnInfo(name = "precision") val precision: Int,
     @ColumnInfo(name = "description") val description: String,
     @ColumnInfo(name = "bit_asset_id") val bitAssetId: String
-)
+) {
+    override fun toString(): String {
+        return symbol
+    }
+}

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

@@ -8,6 +8,7 @@ import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.ArrayAdapter
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModelProviders
@@ -17,21 +18,30 @@ import com.google.zxing.EncodeHintType
 import com.google.zxing.MultiFormatWriter
 import com.google.zxing.WriterException
 import com.google.zxing.common.BitMatrix
+import com.jakewharton.rxbinding2.widget.RxTextView
 import cy.agorise.bitsybitshareswallet.R
 import cy.agorise.bitsybitshareswallet.utils.Constants
+import cy.agorise.bitsybitshareswallet.viewmodels.AssetViewModel
 import cy.agorise.bitsybitshareswallet.viewmodels.UserAccountViewModel
 import cy.agorise.graphenej.*
+import io.reactivex.disposables.CompositeDisposable
 import kotlinx.android.synthetic.main.fragment_receive_transaction.*
 import java.util.*
+import java.util.concurrent.TimeUnit
 
 class ReceiveTransactionFragment : Fragment() {
     private val TAG = this.javaClass.simpleName
 
     private lateinit var mUserAccountViewModel: UserAccountViewModel
+    private lateinit var mAssetViewModel: AssetViewModel
 
     /** Current user account */
     private var mUserAccount: UserAccount? = null
 
+    private var mDisposables = CompositeDisposable()
+
+    private var mAsset: Asset? = null
+
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_receive_transaction, container, false)
     }
@@ -48,16 +58,41 @@ class ReceiveTransactionFragment : Fragment() {
         mUserAccountViewModel.getUserAccount(userId!!).observe(this,
             Observer<cy.agorise.bitsybitshareswallet.database.entities.UserAccount>{ user ->
                 mUserAccount = UserAccount(user.id, user.name)
-                updateQR()
         })
+
+        mAssetViewModel = ViewModelProviders.of(this).get(AssetViewModel::class.java)
+
+        mAssetViewModel.getAll().observe(this,
+            Observer<List<cy.agorise.bitsybitshareswallet.database.entities.Asset>> { assets ->
+                val adapter = ArrayAdapter<cy.agorise.bitsybitshareswallet.database.entities.Asset>(context!!,
+                    android.R.layout.simple_dropdown_item_1line, assets)
+                actvAsset.setAdapter(adapter)
+        })
+
+        actvAsset.setOnItemClickListener { parent, _, position, _ ->
+            val asset = parent.adapter.getItem(position) as cy.agorise.bitsybitshareswallet.database.entities.Asset
+            mAsset = Asset(asset.id, asset.symbol, asset.precision)
+            updateQR()
+        }
+
+        // Use RxJava Debounce to avoid making calls to the NetworkService on every text change event
+//        mDisposables.add(
+//            RxTextView.textChanges(tietAmount)
+//                .debounce(500, TimeUnit.MILLISECONDS)
+//                .map { it.toString().trim() }
+//                .filter { it.length > 1 }
+//                .subscribe {
+//
+//                }
+//        )
     }
 
     private fun updateQR() {
-        val inputCoinType = "bts"
+        val amount: Long = 10
 
-        val total = Util.fromBase(AssetAmount(UnsignedLong.valueOf(10), Asset("1.3.0", "bts", 5)))
+        val total = Util.fromBase(AssetAmount(UnsignedLong.valueOf(amount), mAsset!!))
         val items = arrayOf(LineItem("transfer", 1, total))
-        val invoice = Invoice(mUserAccount!!.name, "", "#bitsy", inputCoinType, items, "", "")
+        val invoice = Invoice(mUserAccount!!.name, "", "#bitsy", mAsset!!.symbol, items, "", "")
         Log.d(TAG, "invoice: " + invoice.toJsonString())
         try {
             val bitmap = encodeAsBitmap(Invoice.toQrCode(invoice), "#139657") // PalmPay green

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

@@ -24,7 +24,7 @@ import com.google.zxing.BarcodeFormat
 import com.google.zxing.Result
 import com.jakewharton.rxbinding2.widget.RxTextView
 import cy.agorise.bitsybitshareswallet.R
-import cy.agorise.bitsybitshareswallet.adapters.AssetsAdapter
+import cy.agorise.bitsybitshareswallet.adapters.BalancesDetailsAdapter
 import cy.agorise.bitsybitshareswallet.database.joins.BalanceDetail
 import cy.agorise.bitsybitshareswallet.repositories.AuthorityRepository
 import cy.agorise.bitsybitshareswallet.utils.Constants
@@ -75,7 +75,7 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
 
     private lateinit var mBalanceDetailViewModel: BalanceDetailViewModel
 
-    private var mAssetsAdapter: AssetsAdapter? = null
+    private var mBalancesDetailsAdapter: BalancesDetailsAdapter? = null
 
     private var selectedAssetSymbol = ""
 
@@ -129,12 +129,12 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
 
         mBalanceDetailViewModel.getAll().observe(this, Observer<List<BalanceDetail>> { balancesDetails ->
             mBalancesDetails = balancesDetails
-            mAssetsAdapter = AssetsAdapter(context!!, android.R.layout.simple_spinner_item, mBalancesDetails!!)
+            mBalancesDetailsAdapter = BalancesDetailsAdapter(context!!, android.R.layout.simple_spinner_item, mBalancesDetails!!)
-            spAsset.adapter = mAssetsAdapter
+            spAsset.adapter = mBalancesDetailsAdapter
 
             // Try to select the selectedAssetSymbol
-            for (i in 0 until mAssetsAdapter!!.count) {
+            for (i in 0 until mBalancesDetailsAdapter!!.count) {
-                if (mAssetsAdapter!!.getItem(i)!!.symbol == selectedAssetSymbol) {
+                if (mBalancesDetailsAdapter!!.getItem(i)!!.symbol == selectedAssetSymbol) {
                     spAsset.setSelection(i)
                     break
                 }
@@ -145,7 +145,7 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
             override fun onNothingSelected(parent: AdapterView<*>?) { }
 
             override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
-                val balance = mAssetsAdapter!!.getItem(position)!!
+                val balance = mBalancesDetailsAdapter!!.getItem(position)!!
                 selectedAssetSymbol = balance.symbol
 
                 val amount = balance.amount.toDouble() / Math.pow(10.0, balance.precision.toDouble())
@@ -160,7 +160,8 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
 
         authorityRepository = AuthorityRepository(context!!)
 
-        mDisposables.add(authorityRepository!!.getWIF(userId!!, AuthorityType.ACTIVE.ordinal)
+        mDisposables.add(
+            authorityRepository!!.getWIF(userId!!, AuthorityType.ACTIVE.ordinal)
                 .subscribeOn(Schedulers.computation())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe { encryptedWIF ->
@@ -170,10 +171,12 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
                         Log.e(TAG, "AEADBadTagException. Class: " + e.javaClass + ", Msg: " + e.message)
                     }
 
-            })
+                }
+        )
 
         // Use RxJava Debounce to avoid making calls to the NetworkService on every text change event
-        mDisposables.add(RxTextView.textChanges(tietTo)
+        mDisposables.add(
+            RxTextView.textChanges(tietTo)
                 .debounce(500, TimeUnit.MILLISECONDS)
                 .map { it.toString().trim() }
                 .filter { it.length > 1 }
@@ -184,7 +187,8 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
         )
 
         // Use RxJava Debounce to update the Amount error only after the user stops writing for > 500 ms
-        mDisposables.add(RxTextView.textChanges(tietAmount)
+        mDisposables.add(
+            RxTextView.textChanges(tietAmount)
                 .debounce(500, TimeUnit.MILLISECONDS)
                 .filter { it.isNotEmpty() }
                 .map { it.toString().trim().toDouble() }
@@ -193,7 +197,8 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
         )
 
         // Connect to the RxBus, which receives events from the NetworkService
-        mDisposables.add(RxBus.getBusInstance()
+        mDisposables.add(
+            RxBus.getBusInstance()
                 .asFlowable()
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe { handleIncomingMessage(it) }
@@ -244,7 +249,7 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
 
             transaction!!.blockData = BlockData(headBlockNumber, headBlockId, expirationTime)
 
-            val asset = Asset(mAssetsAdapter!!.getItem(spAsset.selectedItemPosition)!!.id)
+            val asset = Asset(mBalancesDetailsAdapter!!.getItem(spAsset.selectedItemPosition)!!.id)
 
             val id = mNetworkService!!.sendMessage(GetRequiredFees(transaction!!, asset), GetRequiredFees.REQUIRED_API)
             responseMap[id] = RESPONSE_GET_REQUIRED_FEES
@@ -317,8 +322,8 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
 
             tietTo.setText(invoice.to)
 
-            for (i in 0 until mAssetsAdapter!!.count) {
+            for (i in 0 until mBalancesDetailsAdapter!!.count) {
-                if (mAssetsAdapter!!.getItem(i)!!.symbol == invoice.currency.toUpperCase()) {
+                if (mBalancesDetailsAdapter!!.getItem(i)!!.symbol == invoice.currency.toUpperCase()) {
                     spAsset.setSelection(i)
                     break
                 }
@@ -341,7 +346,7 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
     }
 
     private fun validateAmount(amount: Double) {
-        val balance = mAssetsAdapter!!.getItem(spAsset.selectedItemPosition)!!
+        val balance = mBalancesDetailsAdapter!!.getItem(spAsset.selectedItemPosition)!!
         val currentAmount = balance.amount.toDouble() / Math.pow(10.0, balance.precision.toDouble())
 
         if (currentAmount < amount) {
@@ -365,7 +370,7 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
     private fun startSendTransferOperation() {
         // Create TransferOperation
         if (mNetworkService!!.isConnected) {
-            val balance = mAssetsAdapter!!.getItem(spAsset.selectedItemPosition)!!
+            val balance = mBalancesDetailsAdapter!!.getItem(spAsset.selectedItemPosition)!!
             val amount = (tietAmount.text.toString().toDouble() * Math.pow(10.0, balance.precision.toDouble())).toLong()
 
             val transferAmount = AssetAmount(UnsignedLong.valueOf(amount), Asset(balance.id))

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

@@ -2,6 +2,7 @@ package cy.agorise.bitsybitshareswallet.repositories
 
 import android.app.Application
 import android.os.AsyncTask
+import androidx.lifecycle.LiveData
 import cy.agorise.bitsybitshareswallet.database.daos.AssetDao
 import cy.agorise.bitsybitshareswallet.database.BitsyDatabase
 import cy.agorise.bitsybitshareswallet.database.entities.Asset
@@ -15,6 +16,10 @@ class AssetRepository internal constructor(application: Application) {
         mAssetDao = db!!.assetDao()
     }
 
+    fun getAll(): LiveData<List<Asset>> {
+        return mAssetDao.getAll()
+    }
+
     fun insertAll(assets: List<Asset>) {
         insertAllAsyncTask(mAssetDao).execute(assets)
     }

app/src/main/java/cy/agorise/bitsybitshareswallet/viewmodels/AssetViewModel.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.entities.Asset
+import cy.agorise.bitsybitshareswallet.repositories.AssetRepository
+
+class AssetViewModel(application: Application) : AndroidViewModel(application) {
+    private var mRepository = AssetRepository(application)
+
+    internal fun getAll(): LiveData<List<Asset>> {
+        return mRepository.getAll()
+    }
+}