Make apps work on API 21+ (except cashier that needs 23+)

4 files changed, 9 insertions, 25 deletions

diff --git a/wallet/src/main/java/net/taler/wallet/UriInputFragment.kt b/wallet/src/main/java/net/taler/wallet/UriInputFragment.kt
index d17977b..f4a5f23 100644
--- a/wallet/src/main/java/net/taler/wallet/UriInputFragment.kt
+++ b/wallet/src/main/java/net/taler/wallet/UriInputFragment.kt
@@ -26,6 +26,7 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
 import android.widget.Toast.LENGTH_LONG
+import androidx.core.content.getSystemService
 import androidx.fragment.app.Fragment
 import net.taler.wallet.databinding.FragmentUriInputBinding
 
@@ -43,10 +44,10 @@ class UriInputFragment : Fragment() {
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        val clipboard = requireContext().getSystemService(ClipboardManager::class.java)!!
+        val clipboard = requireContext().getSystemService<ClipboardManager>()
 
         ui.pasteButton.setOnClickListener {
-            val item = clipboard.primaryClip?.getItemAt(0)
+            val item = clipboard?.primaryClip?.getItemAt(0)
             if (item?.text != null) {
                 ui.uriView.setText(item.text)
             } else {
diff --git a/wallet/src/main/java/net/taler/wallet/Utils.kt b/wallet/src/main/java/net/taler/wallet/Utils.kt
index ea01552..388bf61 100644
--- a/wallet/src/main/java/net/taler/wallet/Utils.kt
+++ b/wallet/src/main/java/net/taler/wallet/Utils.kt
@@ -29,8 +29,8 @@ import android.os.Build.VERSION.SDK_INT
 import android.widget.Toast
 import android.widget.Toast.LENGTH_LONG
 import androidx.annotation.RequiresApi
+import androidx.core.content.getSystemService
 import com.google.zxing.integration.android.IntentIntegrator
-import org.json.JSONObject
 
 fun scanQrCode(activity: Activity) {
     IntentIntegrator(activity).apply {
@@ -69,7 +69,7 @@ private fun connectToWifi29(context: Context, ssid: String) {
 
 @Suppress("DEPRECATION")
 private fun connectToWifiDeprecated(context: Context, ssid: String) {
-    context.getSystemService(WifiManager::class.java)?.apply {
+    context.getSystemService<WifiManager>()?.apply {
         if (!isWifiEnabled) {
             val enabledResult = setWifiEnabled(true)
             while (enabledResult && !isWifiEnabled) Thread.sleep(25)
@@ -91,22 +91,6 @@ private fun connectToWifiDeprecated(context: Context, ssid: String) {
     }
 }
 
-fun getErrorString(json: JSONObject): String {
-    return StringBuilder().apply {
-        append(json.getString("talerErrorCode"))
-        append(" ")
-        append(json.getString("message"))
-        json.optJSONObject("details")?.let { details ->
-            details.optJSONObject("errorResponse")?.let { errorResponse ->
-                append("\n\n")
-                append(errorResponse.optString("code"))
-                append(" ")
-                append(errorResponse.optString("hint"))
-            }
-        }
-    }.toString()
-}
-
 fun cleanExchange(exchange: String) = exchange.let {
     if (it.startsWith("https://")) it.substring(8) else it
 }.trimEnd('/')
diff --git a/wallet/src/main/java/net/taler/wallet/transactions/TransactionAdapter.kt b/wallet/src/main/java/net/taler/wallet/transactions/TransactionAdapter.kt
index 936bbbd..5e492f5 100644
--- a/wallet/src/main/java/net/taler/wallet/transactions/TransactionAdapter.kt
+++ b/wallet/src/main/java/net/taler/wallet/transactions/TransactionAdapter.kt
@@ -25,6 +25,7 @@ import android.view.View.VISIBLE
 import android.view.ViewGroup
 import android.widget.ImageView
 import android.widget.TextView
+import androidx.core.content.ContextCompat.getColor
 import androidx.recyclerview.selection.ItemDetailsLookup
 import androidx.recyclerview.selection.ItemKeyProvider
 import androidx.recyclerview.selection.SelectionTracker
@@ -80,13 +81,11 @@ internal class TransactionAdapter(
         private val amount: TextView = v.findViewById(R.id.amount)
         private val pendingView: TextView = v.findViewById(R.id.pendingView)
 
-        private val selectableForeground = v.foreground
         private val amountColor = amount.currentTextColor
-        private val red = context.getColor(R.color.red)
-        private val green = context.getColor(R.color.green)
+        private val red = getColor(context, R.color.red)
+        private val green = getColor(context, R.color.green)
 
         fun bind(transaction: Transaction, selected: Boolean) {
-            v.foreground = selectableForeground
             v.setOnClickListener { listener.onTransactionClicked(transaction) }
             v.isActivated = selected
             if (transaction.error == null) {
diff --git a/wallet/src/main/java/net/taler/wallet/withdraw/ManualWithdrawFragment.kt b/wallet/src/main/java/net/taler/wallet/withdraw/ManualWithdrawFragment.kt
index 4b56dd0..f368c68 100644
--- a/wallet/src/main/java/net/taler/wallet/withdraw/ManualWithdrawFragment.kt
+++ b/wallet/src/main/java/net/taler/wallet/withdraw/ManualWithdrawFragment.kt
@@ -53,7 +53,7 @@ class ManualWithdrawFragment : Fragment() {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         ui.qrCodeButton.setOnClickListener { scanQrCode(requireActivity()) }
         ui.currencyView.text = exchangeItem.currency
-        val paymentOptions = exchangeItem.paytoUris.mapNotNull {paytoUri ->
+        val paymentOptions = exchangeItem.paytoUris.mapNotNull { paytoUri ->
             Uri.parse(paytoUri).authority?.toUpperCase(Locale.getDefault())
         }.joinToString(separator = "\n", prefix = "• ")
         ui.paymentOptionsLabel.text =