Home screen improvements and bug fixes.

- Implemented long press to clear amount
- fixed bugs around No Funds being shown when available was zero but change was pending confirmation
- colored the gray z-icon on the home screen
- added color emphasis when change is pending
- added profile button

app/src/main/java/cash/z/ecc/android/ext/Spannable.kt

@@ -0,0 +1,13 @@
+package cash.z.ecc.android.ext
+
+import android.text.Spannable
+import android.text.Spanned
+import android.text.style.ForegroundColorSpan
+import androidx.core.text.toSpannable
+
+fun String.toColoredSpan(colorResId: Int, coloredPortion: String): Spannable {
+    return toSpannable().apply {
+        val start = this@toColoredSpan.indexOf(coloredPortion)
+        setSpan(ForegroundColorSpan(colorResId.toAppColor()), start, start + coloredPortion.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+    }
+}

app/src/main/java/cash/z/ecc/android/ui/home/HomeFragment.kt

@@ -3,17 +3,19 @@ package cash.z.ecc.android.ui.home
 import android.content.Context
 import android.content.res.ColorStateList
 import android.os.Bundle
+import android.text.Spanned
+import android.text.style.ForegroundColorSpan
 import android.view.LayoutInflater
 import android.view.View
 import android.widget.TextView
+import androidx.core.text.toSpannable
 import androidx.lifecycle.lifecycleScope
 import cash.z.ecc.android.R
 import cash.z.ecc.android.databinding.FragmentHomeBinding
 import cash.z.ecc.android.di.viewmodel.activityViewModel
 import cash.z.ecc.android.di.viewmodel.viewModel
-import cash.z.ecc.android.ext.disabledIf
-import cash.z.ecc.android.ext.goneIf
-import cash.z.ecc.android.ext.onClickNavTo
+import cash.z.ecc.android.ext.*
+import cash.z.ecc.android.ext.toAppColor
 import cash.z.ecc.android.ui.base.BaseFragment
 import cash.z.ecc.android.ui.home.HomeFragment.BannerAction.*
 import cash.z.ecc.android.ui.send.SendViewModel
@@ -87,7 +89,7 @@ class HomeFragment : BaseFragment<FragmentHomeBinding>() {
                 buttonNumberPadDecimal.asKey(),
                 buttonNumberPadBack.asKey()
             )
-            hitAreaReceive.onClickNavTo(R.id.action_nav_home_to_nav_receive)
+            hitAreaReceive.onClickNavTo(R.id.action_nav_home_to_nav_profile)
             iconDetail.onClickNavTo(R.id.action_nav_home_to_nav_detail)
             textDetail.onClickNavTo(R.id.action_nav_home_to_nav_detail)
             hitAreaScan.onClickNavTo(R.id.action_nav_home_to_nav_scan)
@@ -98,17 +100,33 @@ class HomeFragment : BaseFragment<FragmentHomeBinding>() {
             buttonSend.setOnClickListener {
                 onSend()
             }
+            setSendAmount("0")
         }
+
+        binding.buttonNumberPadBack.setOnLongClickListener {
+            onClearAmount()
+            true
+        }
+
 //        if (::uiModel.isInitialized) {
 //            twig("uiModel exists!")
 //            onModelUpdated(HomeViewModel.UiModel(), uiModel)
 //        }
     }
 
+    private fun onClearAmount() {
+        repeat(binding.textSendAmount.text.length) {
+            resumedScope.launch {
+                _typedChars.send('<')
+            }
+        }
+    }
+
     override fun onResume() {
         super.onResume()
         viewModel.initialize(typedChars)
         twig("HomeFragment.onResume  resumeScope.isActive: ${resumedScope.isActive}  $resumedScope")
+        onClearAmount()
         viewModel.uiModels.scanReduce { old, new ->
             onModelUpdated(old, new)
             new
@@ -163,8 +181,11 @@ class HomeFragment : BaseFragment<FragmentHomeBinding>() {
         }
     }
 
+    /**
+     * @param amount the amount to send represented as ZEC, without the dollar sign.
+     */
     fun setSendAmount(amount: String) {
-        binding.textSendAmount.text = "\$$amount"
+        binding.textSendAmount.text = "\$$amount".toColoredSpan(R.color.text_light_dimmed, "$")
         sendViewModel.zatoshiAmount = amount.safelyConvertToBigDecimal().convertZecToZatoshi()
         binding.buttonSend.disabledIf(amount == "0")
     }
@@ -175,7 +196,8 @@ class HomeFragment : BaseFragment<FragmentHomeBinding>() {
         binding.textBalanceDescription.apply {
             goneIf(availableBalance < 0)
             text = if (availableBalance != -1L && (availableBalance < totalBalance)) {
-                "(expecting +${(totalBalance - availableBalance).convertZatoshiToZecString()} ZEC in change)"
+                val change = (totalBalance - availableBalance).convertZatoshiToZecString()
+                "(expecting +$change ZEC in change)".toColoredSpan(R.color.text_light, "+$change")
             } else {
                 "(enter an amount to send)"
             }
@@ -221,7 +243,7 @@ class HomeFragment : BaseFragment<FragmentHomeBinding>() {
     }
 
     private fun onSynced(uiModel: HomeViewModel.UiModel) {
-        if (!uiModel.hasFunds) {
+        if (!uiModel.hasBalance) {
             onNoFunds()
         } else {
             setBanner("")

app/src/main/java/cash/z/ecc/android/ui/home/HomeViewModel.kt

@@ -57,7 +57,7 @@ class HomeViewModel @Inject constructor() : ViewModel() {
         }
         uiModels = synchronizer.run {
             combine(status, progress, balances, zec) { s, p, b, z->
-                UiModel(s, p, b.available, b.total, z)
+                UiModel(s, p, b.availableZatoshi, b.totalZatoshi, z)
             }
         }.conflate()
     }
@@ -81,6 +81,7 @@ class HomeViewModel @Inject constructor() : ViewModel() {
     ): Parcelable {
         // Note: the wallet is effectively empty if it cannot cover the miner's fee
         val hasFunds: Boolean get() = availableBalance > (MINERS_FEE_ZATOSHI.toDouble() / ZATOSHI_PER_ZEC) // 0.0001
+        val hasBalance: Boolean get() = totalBalance > (MINERS_FEE_ZATOSHI.toDouble() / ZATOSHI_PER_ZEC) // 0.0001
         val isSynced: Boolean get() = status == SYNCED
         val isSendEnabled: Boolean get() = isSynced && hasFunds
     }

app/src/main/java/cash/z/ecc/android/ui/receive/ReceiveFragment.kt

@@ -4,7 +4,6 @@ import android.content.Context
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
-import android.widget.Toast
 import cash.z.android.qrecycler.QRecycler
 import cash.z.ecc.android.R
 import cash.z.ecc.android.databinding.FragmentReceiveNewBinding
@@ -12,7 +11,7 @@ import cash.z.ecc.android.di.viewmodel.viewModel
 import cash.z.ecc.android.ext.onClickNavBack
 import cash.z.ecc.android.ext.onClickNavTo
 import cash.z.ecc.android.ui.base.BaseFragment
-import cash.z.wallet.sdk.ext.abbreviatedAddress
+import cash.z.wallet.sdk.ext.toAbbreviatedAddress
 import cash.z.wallet.sdk.ext.twig
 import kotlinx.coroutines.launch
 import kotlin.math.roundToInt
@@ -63,7 +62,7 @@ class ReceiveFragment : BaseFragment<FragmentReceiveNewBinding>() {
             .withCorrectionLevel(QRecycler.CorrectionLevel.MEDIUM)
             .into(binding.receiveQrCode)
 
-        binding.receiveAddress.text = address.abbreviatedAddress(12, 12)
+        binding.receiveAddress.text = address.toAbbreviatedAddress(12, 12)
 
 //        address.distribute(8) { i, part ->
 //            setAddressPart(i, part)

app/src/main/java/cash/z/ecc/android/ui/send/SendViewModel.kt

@@ -47,6 +47,9 @@ class SendViewModel @Inject constructor() : ViewModel() {
             zatoshiAmount < ZcashSdk.MINERS_FEE_ZATOSHI -> {
                 emit("Please enter a larger amount")
             }
+            synchronizer.getAddress() == toAddress -> {
+                emit("That appears to be your address!")
+            }
             else -> emit(null)
         }
     }

app/src/main/java/cash/z/ecc/android/ui/setup/BackupFragment.kt

@@ -32,7 +32,7 @@ import kotlinx.coroutines.withContext
 class BackupFragment : BaseFragment<FragmentBackupBinding>() {
     val walletSetup: WalletSetupViewModel by activityViewModel(false)
 
-    private var hasBackUp: Boolean? = null
+    private var hasBackUp: Boolean = true //TODO: implement backup and then check for it here-ish
 
     override fun inflate(inflater: LayoutInflater): FragmentBackupBinding =
         FragmentBackupBinding.inflate(inflater)
@@ -80,7 +80,7 @@ class BackupFragment : BaseFragment<FragmentBackupBinding>() {
         if (showMessage) {
             Toast.makeText(activity, "Backup verification coming soon!", Toast.LENGTH_LONG).show()
         }
-        mainActivity?.navController?.popBackStack(R.id.wallet_setup_navigation, true)
+        mainActivity?.navController?.popBackStack()
     }
 
     private fun applySpan(vararg textViews: TextView) = lifecycleScope.launch {

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

@@ -74,7 +74,9 @@
         android:layout_height="wrap_content"
         android:text="(enter an amount to send)"
         android:visibility="gone"
+        tools:visibility="visible"
         android:textAppearance="@style/TextAppearance.MaterialComponents.Body2"
+        android:textColor="@color/text_light_dimmed"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintTop_toBottomOf="@id/text_balance_available" />
@@ -291,14 +293,14 @@
         android:layout_height="0dp"
         android:elevation="6dp"
         app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintDimensionRatio="H,1:1"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHeight_percent="0.03825136612"
-        app:layout_constraintHorizontal_bias="0.8883"
         app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintHorizontal_bias="0.8883"
         app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintVertical_bias="0.06420765027"
-        app:layout_constraintWidth_percent="0.05582524272"
-        app:srcCompat="@drawable/ic_receive_funds" />
+        app:layout_constraintVertical_bias="0.064"
+        app:layout_constraintWidth_percent="0.08"
+        app:srcCompat="@drawable/ic_account_circle" />
 
     <ImageView
         android:id="@+id/icon_detail"
@@ -359,7 +361,7 @@
         android:layout_height="0dp"
         android:gravity="center"
         android:includeFontPadding="false"
-        android:text="$0"
+        tools:text="$0"
         android:textAppearance="@style/Zcash.TextAppearance.Zec"
         android:textSize="72dp"
         android:maxLines="1"

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

@@ -88,7 +88,6 @@
         android:id="@+id/icon_qr_logo"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        android:layout_marginStart="16dp"
         android:onClick="copyAddress"
         android:scaleType="fitCenter"
         android:src="@drawable/ic_zcash_primary"
@@ -135,6 +134,27 @@
         app:layout_constraintStart_toEndOf="@id/receive_address"
         app:layout_constraintTop_toTopOf="@id/receive_address" />
 
+    <Space
+        android:id="@+id/space_address_median"
+        android:layout_width="1dp"
+        android:layout_height="1dp"
+        app:layout_constraintTop_toBottomOf="@id/receive_address"
+        app:layout_constraintBottom_toTopOf="@id/button_scan"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintVertical_bias="0.4"/>
+
+    <View
+        android:id="@+id/hit_area_address"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:onClick="copyAddress"
+        app:layout_constraintStart_toStartOf="@id/receive_address"
+        app:layout_constraintEnd_toEndOf="@id/background_qr"
+        app:layout_constraintTop_toTopOf="@id/receive_title"
+        app:layout_constraintBottom_toTopOf="@id/space_address_median"
+        tools:background="@color/spacer" />
+
     <com.google.android.material.button.MaterialButton
         android:id="@+id/button_scan"
         android:layout_width="0dp"