Created a DatabaseLoadActivity which loads basic information of all the BitShares assets and stores them in the database. This process only occurs once during the initial setup.

app/src/main/AndroidManifest.xml

@@ -21,14 +21,15 @@
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
+        <activity android:name=".activities.LicenseActivity"/>
+        <activity android:name=".activities.DatabaseLoadActivity"/>
+        <activity android:name=".activities.ImportBrainkeyActivity"/>
+        <activity android:name=".activities.MainActivity"/>
         <activity
             android:name=".activities.SettingsActivity"
             android:label="@string/title_settings"/>
         <activity android:name=".activities.SendTransactionActivity"/>
         <activity android:name=".activities.ReceiveTransactionActivity"/>
-        <activity android:name=".activities.MainActivity"/>
-        <activity android:name=".activities.LicenseActivity"/>
-        <activity android:name=".activities.ImportBrainkeyActivity"/>
     </application>
 
 </manifest>

app/src/main/java/cy/agorise/bitsybitshareswallet/activities/ConnectedActivity.kt

@@ -72,13 +72,13 @@ abstract class ConnectedActivity : AppCompatActivity(), ServiceConnection {
                             Toast.LENGTH_LONG
                         ).show()
                     }
-//                } else if (message is ConnectionStatusUpdate) {
+                } else if (message is ConnectionStatusUpdate) {
-//                    handleConnectionStatusUpdate(message)
+                    handleConnectionStatusUpdate(message)
-//                    if (message.updateCode == ConnectionStatusUpdate.DISCONNECTED) {
+                    if (message.updateCode == ConnectionStatusUpdate.DISCONNECTED) {
 //                        recurrentAccountUpdateId = -1
 //                        accountOpRequestId = -1
 //                        isProcessingTx = false
-//                    }
+                    }
                 }
             }
     }

app/src/main/java/cy/agorise/bitsybitshareswallet/activities/DatabaseLoadActivity.kt

@@ -0,0 +1,181 @@
+package cy.agorise.bitsybitshareswallet.activities
+
+import android.content.ComponentName
+import android.content.Intent
+import android.os.Bundle
+import android.os.CountDownTimer
+import android.os.Handler
+import android.os.IBinder
+import android.preference.PreferenceManager
+import android.util.Log
+import android.view.View
+import cy.agorise.bitsybitshareswallet.R
+import cy.agorise.bitsybitshareswallet.repositories.AssetRepository
+import cy.agorise.bitsybitshareswallet.utils.Constants
+import cy.agorise.graphenej.Asset
+import cy.agorise.graphenej.api.ApiAccess
+import cy.agorise.graphenej.api.ConnectionStatusUpdate
+import cy.agorise.graphenej.api.calls.ListAssets
+import cy.agorise.graphenej.models.JsonRpcResponse
+import kotlinx.android.synthetic.main.activity_database_load.*
+
+class DatabaseLoadActivity: ConnectedActivity() {
+    private val TAG = "DatabaseLoadActivity"
+
+    /** Time in milliseconds to wait before re-trying to access the full node */
+    private val NETWORK_RETRY_PERIOD: Long = 1000
+
+    /** Handler instance used to schedule tasks back to the main thread */
+    private var mHandler: Handler? = null
+
+    /** Timer used to avoid multiple instances of the following activity */
+    private var countDownTimer: CountDownTimer? = null
+
+    /** Repository used as the single point of truth for Assets */
+    private var mAssetRepository: AssetRepository? = null
+
+    // Variable used to keep track of the last lower bound used int asset batch loading
+    private var lastLowerBound: String? = null
+
+    // Variable used to keep track of the possession state of the database api id
+    private var hasDatabaseApiId: Boolean = false
+
+    // Variable used to count the number of assets already loaded
+    private var loadedAssetsCounter: Int = 0
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_database_load)
+
+        mHandler = Handler()
+
+        mAssetRepository = AssetRepository(application)
+
+        btnNext.setOnClickListener { onNext() }
+    }
+    override fun handleJsonRpcResponse(response: JsonRpcResponse<*>) {
+        if (response.result is List<*> &&
+            (response.result as List<*>).size > 0 &&
+            (response.result as List<*>)[0] is Asset) {
+            handlePlatformAssetBatch(response.result as List<Asset>)
+        }
+    }
+
+    override fun handleConnectionStatusUpdate(connectionStatusUpdate: ConnectionStatusUpdate) {
+        if (connectionStatusUpdate.updateCode == ConnectionStatusUpdate.API_UPDATE &&
+            connectionStatusUpdate.api and ApiAccess.API_DATABASE == ApiAccess.API_DATABASE) {
+            hasDatabaseApiId = true
+            this.lastLowerBound = ""
+            sendAssetBatchRequest()
+        }
+    }
+
+    /**
+     * Method that issues a request for the next 100 known assets, starting from the last known
+     * lower bound for the asset symbol.
+     */
+    private fun sendAssetBatchRequest() {
+        if (mNetworkService != null && mNetworkService!!.isConnected) {
+            mNetworkService!!.sendMessage(ListAssets(lastLowerBound, ListAssets.LIST_ALL), ListAssets.REQUIRED_API)
+        } else {
+            Handler().postDelayed({ sendAssetBatchRequest() }, NETWORK_RETRY_PERIOD)
+        }
+    }
+
+    /**
+     * Method that loads a new batch of platform assets into the database and decides whether to finish
+     * the procedure or to keep requesting for more assets.
+     *
+     * @param assetList The list of assets obtained in the last 'list_assets' API call.
+     */
+    private fun handlePlatformAssetBatch(assetList: List<Asset>) {
+        val assets = mutableListOf<cy.agorise.bitsybitshareswallet.models.Asset>()
+
+        // TODO find if there is a better way to convert to Bitsy Asset instances
+        for (_asset in assetList) {
+            val asset = cy.agorise.bitsybitshareswallet.models.Asset(
+                _asset.objectId,
+                _asset.symbol,
+                _asset.precision,
+                _asset.description ?: "",
+                _asset.bitassetId ?: ""
+            )
+
+            assets.add(asset)
+        }
+
+        mAssetRepository!!.insertAll(assets)
+
+        loadedAssetsCounter += assetList.size
+
+        tvLoadMessage.text = getString(R.string.text__loading_assets, loadedAssetsCounter)
+
+        if (assetList.size < ListAssets.MAX_BATCH_SIZE) {
+            // We might have reached the end of the asset list
+            Log.d(TAG, "We might have reached the end!")
+
+            // Storing the last asset update time and setting the database as loaded
+            PreferenceManager.getDefaultSharedPreferences(applicationContext)
+                .edit()
+                .putLong(Constants.KEY_LAST_ASSET_LIST_UPDATE, System.currentTimeMillis())
+                .apply()
+
+            onAssetsReady()
+        } else {
+            // Using the last asset symbol in the list as the new lower bound.
+            lastLowerBound = assetList[assetList.size - 1].symbol
+            sendAssetBatchRequest()
+        }
+    }
+
+    private fun onAssetsReady() {
+        // Storing the last asset update time and setting the database as loaded
+        PreferenceManager.getDefaultSharedPreferences(applicationContext)
+            .edit()
+            .putBoolean(Constants.KEY_DATABASE_LOADED, true)
+            .apply()
+
+
+        mHandler!!.post {
+            progressBar.visibility = View.INVISIBLE
+            btnNext.isEnabled = true
+            tvLoadTitle.setText(R.string.title__assets_loaded)
+            tvLoadMessage.setText(R.string.text__assets_loaded)
+
+            // Timer to automatically take user to the next activity
+            countDownTimer = object : CountDownTimer(5000, 1000) {
+
+                override fun onTick(millisUntilFinished: Long) {}
+
+                override fun onFinish() {
+                    onNext()
+                }
+            }.start()
+        }
+    }
+
+    /**
+     * Called whenever the user clicks on the 'next' button_light. This button_light will only be visible when
+     * the database loading procedure is done, OR if there was an error in it.
+     */
+    fun onNext() {
+        // Cancel timer to avoid starting InitialSetupActivity twice
+        countDownTimer!!.cancel()
+
+        val intent = Intent(applicationContext, ImportBrainkeyActivity::class.java)
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        startActivity(intent)
+//        overridePendingTransition(R.anim.slide_in_right, R.anim.slide_out_left)
+        finish()
+    }
+
+    override fun onServiceConnected(name: ComponentName?, service: IBinder?) {
+        super.onServiceConnected(name, service)
+
+        hasDatabaseApiId = mNetworkService!!.hasApiId(ApiAccess.API_DATABASE)
+        if (hasDatabaseApiId) {
+            this.lastLowerBound = ""
+            sendAssetBatchRequest()
+        }
+    }
+}

app/src/main/java/cy/agorise/bitsybitshareswallet/activities/LicenseActivity.kt

@@ -32,7 +32,8 @@ class LicenseActivity : AppCompatActivity() {
 
     /**
      * This function stores the version of the current accepted license version into the Shared Preferences and
-     * sends the user to either import/create account if there is no active account or to the MainActivity otherwise
+     * sends the user to load the assets database if they have not been loaded, import/create account if there is no
+     * active account or to the MainActivity otherwise.
      */
     private fun agree() {
         PreferenceManager.getDefaultSharedPreferences(this).edit()
@@ -40,13 +41,19 @@ class LicenseActivity : AppCompatActivity() {
 
         val intent : Intent?
 
+        val isDatabaseLoaded = PreferenceManager.getDefaultSharedPreferences(this)
+            .getBoolean(Constants.KEY_DATABASE_LOADED, false)
+
         val initialSetupDone = PreferenceManager.getDefaultSharedPreferences(this)
             .getBoolean(Constants.KEY_INITIAL_SETUP_DONE, false)
 
-        intent = if (initialSetupDone)
+        intent = if (!isDatabaseLoaded)
-            Intent(this, MainActivity::class.java)
+            Intent(this, DatabaseLoadActivity::class.java)
-        else
+        else if (!initialSetupDone)
             Intent(this, ImportBrainkeyActivity::class.java)
+        else
+            Intent(this, MainActivity::class.java)
+
 
         startActivity(intent)
         finish()

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

@@ -3,6 +3,7 @@ package cy.agorise.bitsybitshareswallet.daos
 import androidx.lifecycle.LiveData
 import androidx.room.Dao
 import androidx.room.Insert
+import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import cy.agorise.bitsybitshareswallet.models.Asset
 
@@ -11,6 +12,9 @@ interface AssetDao {
     @Insert
     fun insert(asset: Asset)
 
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insertAll(assets: List<Asset>)
+
     @Query("SELECT * FROM assets")
     fun getAllAssets(): LiveData<List<Asset>>
 }

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

@@ -0,0 +1,30 @@
+package cy.agorise.bitsybitshareswallet.repositories
+
+import android.app.Application
+import android.os.AsyncTask
+import cy.agorise.bitsybitshareswallet.daos.AssetDao
+import cy.agorise.bitsybitshareswallet.daos.BitsyDatabase
+import cy.agorise.bitsybitshareswallet.models.Asset
+
+class AssetRepository internal constructor(application: Application) {
+
+    private val mAssetDao: AssetDao
+
+    init {
+        val db = BitsyDatabase.getDatabase(application)
+        mAssetDao = db!!.assetDao()
+    }
+
+    fun insertAll(assets: List<Asset>) {
+        insertAllAsyncTask(mAssetDao).execute(assets)
+    }
+
+    private class insertAllAsyncTask internal constructor(private val mAsyncTaskDao: AssetDao) :
+        AsyncTask<List<Asset>, Void, Void>() {
+
+        override fun doInBackground(vararg assets: List<Asset>): Void? {
+            mAsyncTaskDao.insertAll(assets[0])
+            return null
+        }
+    }
+}

app/src/main/java/cy/agorise/bitsybitshareswallet/utils/Constants.kt

@@ -9,6 +9,18 @@ object Constants {
     /** Version of the currently used license */
     const val CURRENT_LICENSE_VERSION = 1
 
+    /** Key used to store if the assets database has been loaded or not */
+    const val KEY_DATABASE_LOADED = "key_database_loaded"
+
+    /**
+     * Key used to store a preference value used to keep track of the last time the assets in
+     * database were updated.
+     */
+    const val KEY_LAST_ASSET_LIST_UPDATE = "key_last_assets_update"
+
+    /** Key used to store if the initial setup is already done or not */
+    const val KEY_INITIAL_SETUP_DONE = "key_initial_setup_done"
+
     /** Key used to store the id value of the currently active account in the shared preferences */
     const val KEY_CURRENT_ACCOUNT_ID = "key_current_account_id"
 
@@ -24,9 +36,6 @@ object Constants {
      */
     const val LIFETIME_EXPIRATION_DATE = "1969-12-31T23:59:59"
 
-    /** Key used to store if the initial setup is already done or not */
-    const val KEY_INITIAL_SETUP_DONE = "key_initial_setup_done"
-
     /** Key used to store the night mode setting into the shared preferences */
     const val KEY_NIGHT_MODE_ACTIVATED = "key_night_mode_activated"
 }

app/src/main/res/layout/activity_database_load.xml

@@ -0,0 +1,89 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/activity_database_load"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingStart="@dimen/activity_horizontal_margin"
+    android:paddingEnd="@dimen/activity_horizontal_margin"
+    tools:context=".activities.DatabaseLoadActivity">
+
+    <ImageView
+        android:id="@+id/imageView"
+        android:layout_width="@dimen/logo_size"
+        android:layout_height="@dimen/logo_size"
+        android:layout_gravity="center"
+        android:layout_marginBottom="25dp"
+        android:src="@drawable/bts_logo"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent"/>
+
+    <TextView
+        android:id="@+id/tvLoadTitle"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="10dp"
+        android:gravity="center"
+        android:text="@string/title__loading_assets"
+        android:textAppearance="@style/TextAppearance.Bitsy.Headline5"
+        app:layout_constraintBottom_toTopOf="@+id/tvLoadMessage"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/imageView" />
+
+    <TextView
+        android:id="@+id/tvLoadMessage"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:paddingLeft="@dimen/activity_horizontal_margin"
+        android:paddingRight="@dimen/activity_horizontal_margin"
+        android:text="@string/text__performing_requests"
+        android:textAppearance="@style/TextAppearance.Bitsy.Body1"
+        app:layout_constraintBottom_toTopOf="@+id/guideline"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/tvLoadTitle" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/btnNext"
+        style="@style/Widget.PalmPay.Button"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_centerHorizontal="true"
+        android:text="@string/button__next"
+        android:enabled="false"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        style="@style/Base.Widget.AppCompat.ProgressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_below="@+id/imageView"
+        android:layout_centerHorizontal="true"
+        android:layout_gravity="center"
+        android:layout_margin="15dp"
+        android:indeterminate="true"
+        android:indeterminateOnly="false"
+        android:visibility="visible"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/guideline" />
+
+    <androidx.constraintlayout.widget.Guideline
+        android:id="@+id/guideline"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        app:layout_constraintGuide_percent="0.7" />
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values/dimens.xml

@@ -12,4 +12,7 @@
     <dimen name="spacing_different_topic">24dp</dimen>
     <dimen name="spacing_different_section">40dp</dimen>
 
+    <!-- Initial setup -->
+    <dimen name="logo_size">180dp</dimen>
+
 </resources>

app/src/main/res/values/strings.xml

@@ -7,6 +7,14 @@
     <string name="button__agree">Agree</string>
     <string name="button__disagree">Disagree</string>
 
+    <!-- Database Load Activity-->
+    <string name="title__loading_assets">Loading Assets…</string>
+    <string name="text__performing_requests">Performing a series of requests in order to get the complete list of all existing assets</string>
+    <string name="text__loading_assets">Loaded %1$d assets into the database</string>
+    <string name="title__assets_loaded">Assets Loaded</string>
+    <string name="text__assets_loaded">Next, please setup your account…</string>
+    <string name="button__next">Next</string>
+
     <!-- Import Brainkey Activity -->
     <string name="text_field__6_digit_pin">6+ digits PIN</string>
     <string name="error__pin_too_short">PIN too short</string>

app/src/main/res/values/styles.xml

@@ -42,6 +42,7 @@
     </style>
 
     <!-- Text styles -->
+    <style name="TextAppearance.Bitsy.Headline5" parent="TextAppearance.MaterialComponents.Headline5" />
     <style name="TextAppearance.Bitsy.Headline6" parent="TextAppearance.MaterialComponents.Headline6" />
     <style name="TextAppearance.Bitsy.Subtitle1" parent="TextAppearance.MaterialComponents.Subtitle1" />
     <style name="TextAppearance.Bitsy.Body1" parent="TextAppearance.MaterialComponents.Body1" />