New interface ContactAdder for ContactAddFragment.

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

@@ -77,7 +77,7 @@ public class ContactAdd extends ManagedActivity implements ContactAddFragment.Li
     }
 
     private void addContact() {
-        ((ContactAddFragment) getSupportFragmentManager().findFragmentById(R.id.fragment_container)).addContact();
+        ((ContactAdder) getSupportFragmentManager().findFragmentById(R.id.fragment_container)).addContact();
     }
 
     @Override

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

@@ -22,7 +22,8 @@ import com.xabber.android.ui.adapter.AccountChooseAdapter;
 
 import java.util.Collection;
 
-public class ContactAddFragment extends GroupEditorFragment implements AdapterView.OnItemSelectedListener {
+public class ContactAddFragment extends GroupEditorFragment
+        implements AdapterView.OnItemSelectedListener, ContactAdder {
 
     private static final String SAVED_NAME = "com.xabber.android.ui.ContactAdd.SAVED_NAME";
     private static final String SAVED_ACCOUNT = "com.xabber.android.ui.ContactAdd.SAVED_ACCOUNT";
@@ -166,6 +167,7 @@ public class ContactAddFragment extends GroupEditorFragment implements AdapterVi
     public void onNothingSelected(AdapterView<?> parent) {
     }
 
+    @Override
     public void addContact() {
         if (getAccount() == null) {
             Toast.makeText(getActivity(), getString(R.string.EMPTY_ACCOUNT),

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

+package com.xabber.android.ui;
+
+public interface ContactAdder {
+    void addContact();
+}