ChatViewer: debug check for correct fragment selection added.

app/src/main/java/com/xabber/android/ui/ChatViewer.java

@@ -14,6 +14,7 @@
  */
 package com.xabber.android.ui;
 
+import android.app.Fragment;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
@@ -688,6 +689,19 @@ public class ChatViewer extends ManagedActivity implements OnChatChangedListener
         insertExtraText();
 
         updateRegisteredChats();
+
+        Fragment currentFragment = chatViewerAdapter.getCurrentFragment();
+
+        if (isChatSelected) {
+            if (!(currentFragment instanceof ChatViewerFragment)
+                    || !((ChatViewerFragment) currentFragment).isEqual(actionWithAccount, actionWithUser)) {
+                throw new RuntimeException("Wrong chat fragment selected!");
+            }
+        } else {
+            if (!(currentFragment instanceof RecentChatFragment)) {
+                throw new RuntimeException("RecentChatFragment selected by mistake!");
+            }
+        }
     }
 
     private void insertExtraText() {

app/src/main/java/com/xabber/android/ui/adapter/ChatViewerAdapter.java

@@ -32,6 +32,7 @@ public class ChatViewerAdapter extends FragmentStatePagerAdapter {
     private static final int TOTAL_COUNT = 200;
     private static final int OFFSET = TOTAL_COUNT / 2;
 
+    private Fragment currentFragment;
 
     public ChatViewerAdapter(FragmentManager fragmentManager, String account, String user, FinishUpdateListener finishUpdateListener) {
         super(fragmentManager);
@@ -182,4 +183,15 @@ public class ChatViewerAdapter extends FragmentStatePagerAdapter {
     public int getItemPosition(Object object) {
         return POSITION_NONE;
     }
+
+    @Override
+    public void setPrimaryItem(ViewGroup container, int position, Object object) {
+        super.setPrimaryItem(container, position, object);
+
+        currentFragment = (Fragment) object;
+    }
+
+    public Fragment getCurrentFragment() {
+        return currentFragment;
+    }
 }
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