- Add Navigation's SafeArgs plugin to the project, this plugin enables to pass arguments between fragments in a safe way.

- Use the Navigation AAC to create the navigation from the Balances to the Send and Receive fragments, using Navigation's SafeArgs to activate the camera in SendTransactionFragment in the case the user tapped on the camera button instead ofjust the send button in the Balances.

app/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: 'com.android.application'
+apply plugin: "androidx.navigation.safeargs"
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
 apply plugin: 'kotlin-kapt'
@@ -52,7 +53,6 @@ dependencies {
     implementation "android.arch.navigation:navigation-fragment-ktx:$nav_version"
     implementation "android.arch.navigation:navigation-ui-ktx:$nav_version"
 
-
     implementation 'com.jakewharton.rxbinding2:rxbinding:2.1.1'
 
     implementation 'org.bitcoinj:bitcoinj-core:0.14.3'

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

@@ -6,19 +6,17 @@ import android.preference.PreferenceManager
 import android.view.*
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.Observer
+import androidx.navigation.Navigation
+import androidx.navigation.fragment.findNavController
 import androidx.recyclerview.widget.DividerItemDecoration
-import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.LinearLayoutManager
 
 import cy.agorise.bitsybitshareswallet.R
 import cy.agorise.bitsybitshareswallet.adapters.BalancesAdapter
-import cy.agorise.bitsybitshareswallet.adapters.TransfersDetailsAdapter
 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.TransferDetailViewModel
 import cy.agorise.bitsybitshareswallet.viewmodels.UserAccountViewModel
 import kotlinx.android.synthetic.main.fragment_balances.*
 
@@ -60,6 +58,23 @@ class BalancesFragment : Fragment() {
         mBalanceDetailViewModel.getAll().observe(this, Observer<List<BalanceDetail>> { balancesDetails ->
             balancesAdapter.replaceAll(balancesDetails)
         })
+
+        // Navigate to the Receive Transaction Fragment
+        fabReceiveTransaction.setOnClickListener (
+            Navigation.createNavigateOnClickListener(R.id.receive_action)
+        )
+
+        // Navigate to the Send Transaction Fragment without activating the camera
+        fabSendTransaction.setOnClickListener(
+            Navigation.createNavigateOnClickListener(R.id.send_action)
+        )
+
+        // Navigate to the Send Transaction Fragment using Navigation's SafeArgs to activate the camera
+        fabSendTransactionCamera.setOnClickListener {
+            val action = BalancesFragmentDirections.sendActionCamera()
+            action.setOpenCamera(true)
+            findNavController().navigate(action)
+        }
     }
 
     override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {

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

@@ -122,7 +122,10 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
         if (userId != "")
             mUserAccount = UserAccount(userId)
 
-        verifyCameraPermission()
+        // Use Navigation SafeArgs to decide if we should activate or not the camera feed
+        val safeArgs = SendTransactionFragmentArgs.fromBundle(arguments)
+        if (safeArgs.openCamera)
+            verifyCameraPermission()
 
         fabOpenCamera.setOnClickListener { if (isCameraPreviewVisible) stopCameraPreview() else verifyCameraPermission() }
 

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

@@ -54,7 +54,6 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 app:fabSize="mini"
-                app:maxImageSize="18dp"
                 android:src="@drawable/ic_camera"
                 android:backgroundTint="@color/colorSend"
                 app:layout_constraintTop_toTopOf="parent"

app/src/main/res/navigation/mobile_navigation.xml

@@ -11,6 +11,19 @@
         android:name="cy.agorise.bitsybitshareswallet.fragments.BalancesFragment"
         android:label="@string/app_name"
         tools:layout="@layout/fragment_balances">
+
+        <action
+            android:id="@+id/receive_action"
+            app:destination="@+id/receive_dest"/>
+
+        <action
+            android:id="@+id/send_action"
+            app:destination="@id/send_dest"/>
+
+        <action
+            android:id="@+id/send_action_camera"
+            app:destination="@id/send_dest" >
+        </action>
     </fragment>
 
     <fragment
@@ -24,4 +37,23 @@
         android:name="cy.agorise.bitsybitshareswallet.fragments.TransactionsFragment"
         android:label="@string/title_transactions"
         tools:layout="@layout/fragment_transactions"/>
+
+    <fragment
+        android:id="@+id/receive_dest"
+        android:name="cy.agorise.bitsybitshareswallet.fragments.ReceiveTransactionFragment"
+        android:label="@string/title_receive"
+        tools:layout="@layout/fragment_receive_transaction"/>
+
+    <fragment
+        android:id="@+id/send_dest"
+        android:name="cy.agorise.bitsybitshareswallet.fragments.SendTransactionFragment"
+        android:label="@string/title_send"
+        tools:layout="@layout/fragment_send_transaction">
+
+        <argument
+            android:name="openCamera"
+            app:argType="boolean"
+            android:defaultValue="false" />
+    </fragment>
+
 </navigation>

build.gradle

@@ -9,6 +9,7 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:3.2.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath "android.arch.navigation:navigation-safe-args-gradle-plugin:1.0.0-alpha08"
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files