Avoid NPE in some special cases when trying to create the QR code image in ReceiveTransactionFragment, instead of crashing the app it sends the exception to crashlytics and continues its flow.

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

@@ -10,7 +10,6 @@ import android.preference.PreferenceManager
 import android.util.Log
 import android.view.*
 import android.widget.AdapterView
-import android.widget.Toast
 import androidx.appcompat.widget.Toolbar
 import androidx.collection.LongSparseArray
 import androidx.core.content.ContextCompat
@@ -29,6 +28,7 @@ import cy.agorise.bitsybitshareswallet.adapters.AssetsAdapter
 import cy.agorise.bitsybitshareswallet.adapters.AutoSuggestAssetAdapter
 import cy.agorise.bitsybitshareswallet.utils.Constants
 import cy.agorise.bitsybitshareswallet.utils.Helper
+import cy.agorise.bitsybitshareswallet.utils.toast
 import cy.agorise.bitsybitshareswallet.viewmodels.AssetViewModel
 import cy.agorise.bitsybitshareswallet.viewmodels.UserAccountViewModel
 import cy.agorise.graphenej.*
@@ -153,17 +153,18 @@ class ReceiveTransactionFragment : ConnectedFragment() {
             override fun onNothingSelected(parent: AdapterView<*>?) { }
 
             override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
-                val asset = mAssetsAdapter!!.getItem(position)!!
+                mAssetsAdapter?.getItem(position)?.let { asset ->
+                    if (asset.id == OTHER_ASSET) {
+                        tilAsset.visibility = View.VISIBLE
+                        mAsset = null
+                    } else {
+                        tilAsset.visibility = View.GONE
+                        selectedAssetSymbol = asset.symbol
 
-                if (asset.id == OTHER_ASSET) {
+                        mAsset = Asset(asset.id, asset.toString(), asset.precision)
-                    tilAsset.visibility = View.VISIBLE
+                    }
-                    mAsset = null
-                } else {
-                    tilAsset.visibility = View.GONE
-                    selectedAssetSymbol = asset.symbol
-
-                    mAsset = Asset(asset.id, asset.toString(), asset.precision)
                 }
+
                 updateQR()
             }
         }
@@ -284,6 +285,10 @@ class ReceiveTransactionFragment : ConnectedFragment() {
             updateAmountAddressUI(amount, asset.symbol, asset.precision, mUserAccount!!.name)
         } catch (e: WriterException) {
             Log.e(TAG, "WriterException. Msg: " + e.message)
+            Crashlytics.logException(e)
+        } catch (e: NullPointerException) {
+            Log.e(TAG, "NullPointerException. Msg: " + e.message)
+            Crashlytics.logException(e)
         }
     }
 
@@ -386,7 +391,7 @@ class ReceiveTransactionFragment : ConnectedFragment() {
             if ((grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED)) {
                 shareQRScreenshot()
             } else {
-                Toast.makeText(context!!, getString(R.string.msg__storage_permission_necessary_share), Toast.LENGTH_SHORT).show()
+                context?.toast(getString(R.string.msg__storage_permission_necessary_share))
             }
             return
         }