fixing a couple crashes

app/src/main/kotlin/com/simplemobiletools/contacts/activities/ContactActivity.kt

@@ -104,9 +104,7 @@ abstract class ContactActivity : SimpleActivity() {
     }
 
     fun shareContact() {
-        if (contact != null) {
-            shareContacts(arrayListOf(contact!!))
-        }
+        shareContacts(arrayListOf(contact!!))
     }
 
     fun trySendSMS() {

app/src/main/kotlin/com/simplemobiletools/contacts/activities/EditContactActivity.kt

@@ -94,6 +94,10 @@ class EditContactActivity : ContactActivity() {
     }
 
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        if (contact == null) {
+            return true
+        }
+
         when (item.itemId) {
             R.id.save -> saveContact()
             R.id.share -> shareContact()
@@ -232,7 +236,11 @@ class EditContactActivity : ContactActivity() {
         Intent().apply {
             action = Intent.ACTION_EDIT
             data = getContactPublicUri(contact!!)
-            startActivity(this)
+            if (resolveActivity(packageManager) != null) {
+                startActivity(this)
+            } else {
+                toast(R.string.no_app_found)
+            }
         }
     }
 
@@ -713,7 +721,7 @@ class EditContactActivity : ContactActivity() {
     }
 
     private fun saveContact() {
-        if (isSaving || contact == null) {
+        if (isSaving) {
             return
         }
 

app/src/main/kotlin/com/simplemobiletools/contacts/activities/MainActivity.kt

@@ -354,10 +354,14 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
                     return
                 }
 
-                val inputStream = contentResolver.openInputStream(uri)
-                val out = FileOutputStream(tempFile)
-                inputStream.copyTo(out)
-                showImportContactsDialog(tempFile.absolutePath)
+                try {
+                    val inputStream = contentResolver.openInputStream(uri)
+                    val out = FileOutputStream(tempFile)
+                    inputStream.copyTo(out)
+                    showImportContactsDialog(tempFile.absolutePath)
+                } catch (e: Exception) {
+                    showErrorToast(e)
+                }
             }
             else -> toast(R.string.invalid_file_format)
         }

app/src/main/kotlin/com/simplemobiletools/contacts/activities/ViewContactActivity.kt

@@ -57,6 +57,10 @@ class ViewContactActivity : ContactActivity() {
 
 
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        if (contact == null) {
+            return true
+        }
+
         when (item.itemId) {
             R.id.edit -> editContact(contact!!)
             R.id.share -> shareContact()

app/src/main/kotlin/com/simplemobiletools/contacts/adapters/ContactsAdapter.kt

@@ -145,7 +145,10 @@ class ContactsAdapter(activity: SimpleActivity, var contactItems: ArrayList<Cont
 
         val contactsToRemove = ArrayList<Contact>()
         selectedPositions.sortedDescending().forEach {
-            contactsToRemove.add(contactItems[it])
+            val contact = contactItems.getOrNull(it)
+            if (contact != null) {
+                contactsToRemove.add(contact)
+            }
         }
         contactItems.removeAll(contactsToRemove)