[wallet] change main screen if there is only one currency

If there is more than one currency, the screen shows a list of balances
per currency like it used to.
If there is only one currency, the main screen directly shows the list
of transactions with the balance in the toolbar.

1 files changed, 81 insertions, 0 deletions

diff --git a/wallet/src/main/java/net/taler/wallet/balances/BalanceAdapter.kt b/wallet/src/main/java/net/taler/wallet/balances/BalanceAdapter.kt
new file mode 100644
index 0000000..0ccfeb2
--- /dev/null
+++ b/wallet/src/main/java/net/taler/wallet/balances/BalanceAdapter.kt
@@ -0,0 +1,81 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2020 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.wallet.balances
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.Adapter
+import net.taler.wallet.BalanceItem
+import net.taler.wallet.R
+import net.taler.wallet.balances.BalanceAdapter.BalanceViewHolder
+
+class BalanceAdapter(private val listener: BalanceClickListener) : Adapter<BalanceViewHolder>() {
+
+    private var items = emptyList<BalanceItem>()
+
+    init {
+        setHasStableIds(false)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BalanceViewHolder {
+        val v =
+            LayoutInflater.from(parent.context).inflate(R.layout.list_item_balance, parent, false)
+        return BalanceViewHolder(v)
+    }
+
+    override fun getItemCount() = items.size
+
+    override fun onBindViewHolder(holder: BalanceViewHolder, position: Int) {
+        val item = items[position]
+        holder.bind(item)
+    }
+
+    fun setItems(items: List<BalanceItem>) {
+        this.items = items
+        this.notifyDataSetChanged()
+    }
+
+    inner class BalanceViewHolder(private val v: View) : RecyclerView.ViewHolder(v) {
+        private val currencyView: TextView = v.findViewById(R.id.balance_currency)
+        private val amountView: TextView = v.findViewById(R.id.balance_amount)
+        private val balanceInboundAmount: TextView = v.findViewById(R.id.balanceInboundAmount)
+        private val balanceInboundLabel: TextView = v.findViewById(R.id.balanceInboundLabel)
+
+        fun bind(item: BalanceItem) {
+            v.setOnClickListener { listener.onBalanceClick(item.available.currency) }
+            currencyView.text = item.available.currency
+            amountView.text = item.available.amountStr
+
+            val amountIncoming = item.pendingIncoming
+            if (amountIncoming.isZero()) {
+                balanceInboundAmount.visibility = GONE
+                balanceInboundLabel.visibility = GONE
+            } else {
+                balanceInboundAmount.visibility = VISIBLE
+                balanceInboundLabel.visibility = VISIBLE
+                balanceInboundAmount.text =
+                    v.context.getString(R.string.amount_positive, amountIncoming)
+            }
+        }
+    }
+
+}