fix #80, prevent crashes at rotating with some dialog open

Author: tibbi

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

@@ -59,7 +59,7 @@ class MainActivity : SimpleActivity(), ViewPager.OnPageChangeListener {
 
         val itemIndex = getNoteIndexWithId(wantedNoteId)
 
-        mAdapter = NotesPagerAdapter(supportFragmentManager, mNotes)
+        mAdapter = NotesPagerAdapter(supportFragmentManager, mNotes, applicationContext)
         view_pager.apply {
             adapter = mAdapter
             currentItem = itemIndex

app/src/main/kotlin/com/simplemobiletools/notes/adapters/NotesPagerAdapter.kt

@@ -1,15 +1,19 @@
 package com.simplemobiletools.notes.adapters
 
+import android.content.Context
 import android.os.Bundle
 import android.support.v4.app.Fragment
 import android.support.v4.app.FragmentManager
 import android.support.v4.app.FragmentStatePagerAdapter
 import android.util.SparseArray
+import android.view.ViewGroup
+import com.simplemobiletools.commons.extensions.toast
+import com.simplemobiletools.notes.R
 import com.simplemobiletools.notes.fragments.NoteFragment
 import com.simplemobiletools.notes.helpers.NOTE_ID
 import com.simplemobiletools.notes.models.Note
 
-class NotesPagerAdapter(fm: FragmentManager, private val notes: List<Note>) : FragmentStatePagerAdapter(fm) {
+class NotesPagerAdapter(fm: FragmentManager, val notes: List<Note>, val context: Context) : FragmentStatePagerAdapter(fm) {
     var fragments: SparseArray<NoteFragment> = SparseArray(5)
 
     override fun getCount() = notes.size
@@ -35,4 +39,12 @@ class NotesPagerAdapter(fm: FragmentManager, private val notes: List<Note>) : Fr
     fun saveCurrentNote(position: Int) = fragments[position]?.saveText()
 
     fun showKeyboard(position: Int) = fragments[position]?.showKeyboard()
+
+    override fun finishUpdate(container: ViewGroup?) {
+        try {
+            super.finishUpdate(container)
+        } catch (e: Exception) {
+            context.toast(R.string.unknown_error_occurred)
+        }
+    }
 }