Introduce the new Android Architecture Components' Navigation.

- Remove the old MainActivity layout that included a BottomNavigationView.
- Start using the Navigation AAC and make the BalancesFragment the default Fragment so that it is the first to appear.

app/build.gradle

@@ -33,6 +33,7 @@ android {
 dependencies {
     def lifecycle_version = "2.0.0"
     def room_version = "2.1.0-alpha03"
+    def nav_version = "1.0.0-alpha08"
 
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation project(':graphenejlib:graphenej')
@@ -48,6 +49,10 @@ dependencies {
     kapt "androidx.room:room-compiler:$room_version"
     implementation "androidx.room:room-rxjava2:$room_version" // RxJava support for Room
 
+    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/AndroidManifest.xml

@@ -28,6 +28,7 @@
         <activity android:name=".activities.ImportBrainkeyActivity"/>
         <activity
             android:name=".activities.MainActivity"
+            android:theme="@style/Theme.Bitsy.NoActionBar"
             android:windowSoftInputMode="adjustPan"/>
         <activity
             android:name=".activities.SettingsActivity"

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

@@ -1,74 +1,16 @@
 package cy.agorise.bitsybitshareswallet.activities
 
-import android.content.Intent
 import android.os.Bundle
-import android.view.Menu
-import android.view.MenuItem
-import androidx.fragment.app.Fragment
-import com.google.android.material.bottomnavigation.BottomNavigationView
 import cy.agorise.bitsybitshareswallet.R
-import cy.agorise.bitsybitshareswallet.fragments.BalancesFragment
-import cy.agorise.bitsybitshareswallet.fragments.MerchantsFragment
-import cy.agorise.bitsybitshareswallet.fragments.ReceiveTransactionFragment
-import cy.agorise.bitsybitshareswallet.fragments.SendTransactionFragment
 import cy.agorise.graphenej.api.ConnectionStatusUpdate
 import cy.agorise.graphenej.models.JsonRpcResponse
-import kotlinx.android.synthetic.main.activity_main.*
 
 class MainActivity : ConnectedActivity() {
     private val TAG = this.javaClass.simpleName
 
-    private val mOnNavigationItemSelectedListener = BottomNavigationView.OnNavigationItemSelectedListener { item ->
-        when (item.itemId) {
-            R.id.navigation_receive -> {
-                loadFragment(ReceiveTransactionFragment())
-                return@OnNavigationItemSelectedListener true
-            }
-            R.id.navigation_balances -> {
-                loadFragment(BalancesFragment())
-                return@OnNavigationItemSelectedListener true
-            }
-            R.id.navigation_merchants -> {
-                loadFragment(MerchantsFragment())
-                return@OnNavigationItemSelectedListener true
-            }
-            R.id.navigation_send -> {
-                loadFragment(SendTransactionFragment())
-                return@OnNavigationItemSelectedListener true
-            }
-        }
-        false
-    }
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
-
-        navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)
-        navigation.selectedItemId = R.id.navigation_balances
-    }
-
-    private fun loadFragment(fragment: Fragment) {
-        val ft = supportFragmentManager.beginTransaction()
-        ft.replace(R.id.fragment_frame, fragment)
-        ft.commit()
-    }
-
-    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
-        // Inflates the menu and places it in the toolbar
-        menuInflater.inflate(R.menu.menu_main, menu)
-
-        return true
-    }
-
-    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
-        return if (item!!.itemId == R.id.menu_settings) {
-            val intent = Intent(this, SettingsActivity::class.java)
-            startActivity(intent)
-            true
-        } else {
-            super.onOptionsItemSelected(item)
-        }
     }
 
     override fun handleJsonRpcResponse(response: JsonRpcResponse<*>) {
@@ -80,11 +22,6 @@ class MainActivity : ConnectedActivity() {
      * @param connectionStatusUpdate  Connection status update.
      */
     override fun handleConnectionStatusUpdate(connectionStatusUpdate: ConnectionStatusUpdate) {
-        when (connectionStatusUpdate.updateCode) {
-            ConnectionStatusUpdate.CONNECTED -> { /* Do nothing for now */ }
-            ConnectionStatusUpdate.DISCONNECTED -> { /* Do nothing for now */ }
-            ConnectionStatusUpdate.AUTHENTICATED -> {}//updateBalances() }
-            ConnectionStatusUpdate.API_UPDATE -> { }
-        }
+
     }
 }

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

@@ -1,30 +1,27 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout
+<LinearLayout
         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/container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        android:orientation="vertical"
         tools:context=".activities.MainActivity">
 
-    <FrameLayout
-            android:id="@+id/fragment_frame"
+    <androidx.appcompat.widget.Toolbar
+        android:id="@+id/toolbar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@color/colorPrimary"
+        android:theme="@style/ThemeOverlay.AppCompat.Dark" />
+
+    <fragment
+        android:id="@+id/my_nav_host_fragment"
+        android:name="androidx.navigation.fragment.NavHostFragment"
         android:layout_width="match_parent"
         android:layout_height="0dp"
-            app:layout_constraintTop_toTopOf="parent"
-            app:layout_constraintBottom_toTopOf="@id/navigation"/>
+        android:layout_weight="1"
+        app:defaultNavHost="true"
+        app:navGraph="@navigation/mobile_navigation" />
 
-    <com.google.android.material.bottomnavigation.BottomNavigationView
-            android:id="@+id/navigation"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_marginEnd="0dp"
-            android:layout_marginStart="0dp"
-            android:background="?android:attr/windowBackground"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintLeft_toLeftOf="parent"
-            app:layout_constraintRight_toRightOf="parent"
-            app:menu="@menu/navigation"/>
-
-</androidx.constraintlayout.widget.ConstraintLayout>
+</LinearLayout>

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

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation
+    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/mobile_navigation"
+    app:startDestination="@id/balancesFragment">
+
+    <fragment
+        android:id="@+id/balancesFragment"
+        android:name="cy.agorise.bitsybitshareswallet.fragments.BalancesFragment"
+        android:label="BalancesFragment"
+        tools:layout="@layout/fragment_balances">
+    </fragment>
+</navigation>