cover single choice poll

app/src/main/java/gr/thmmy/mthmmy/activities/topic/TopicAdapter.java

@@ -35,6 +35,8 @@ import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.PopupWindow;
+import android.widget.RadioButton;
+import android.widget.RadioGroup;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
@@ -158,12 +160,27 @@ class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
             PollViewHolder holder = (PollViewHolder) currentHolder;
             holder.question.setText(poll.getQuestion());
             if (poll.getAvailableVoteCount() > 1) {
-                for (int i = 0; i < entries.length; i++) {
+                LinearLayout optionsLayout = new LinearLayout(context);
+                optionsLayout.setOrientation(LinearLayout.HORIZONTAL);
+                for (Poll.Entry entry : entries) {
                     CheckBox checkBox = new CheckBox(context);
-                    checkBox.setText(entries[i].getEntryName());
+                    checkBox.setText(entry.getEntryName());
                     checkBox.setOnCheckedChangeListener((buttonView, isChecked) ->
-                            viewModel.onVoteCheckboxClicked(holder.optionsLayout.indexOfChild(buttonView), isChecked));
+                            viewModel.onVoteCheckboxClicked(optionsLayout.indexOfChild(buttonView), isChecked));
+                    optionsLayout.addView(checkBox);
+                }
+                holder.rootLayout.addView(optionsLayout, 1);
+            } else if (poll.getAvailableVoteCount() == 1) {
+                RadioGroup radioGroup = new RadioGroup(context);
+                for (int i = 0; i < entries.length; i++) {
+                    RadioButton radioButton = new RadioButton(context);
+                    radioButton.setText(entries[i].getEntryName());
+                    radioButton.setOnClickListener(v -> viewModel.onRadioButtonCLicked(radioGroup.indexOfChild(v)));
+                    radioGroup.addView(radioButton);
                 }
+                holder.rootLayout.addView(radioGroup, 1);
+            } else {
+                //Showing results
             }
         } else {
             Post currentPost = (Post) topicItems.get(position);
@@ -665,7 +682,7 @@ class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
 
     static class PollViewHolder extends RecyclerView.ViewHolder {
         final TextView question, errorTooManySelected;
-        final LinearLayout optionsLayout;
+        final LinearLayout rootLayout;
         final AppCompatButton submitButton;
         final AppCompatButton removeVotesButton;
 
@@ -673,7 +690,7 @@ class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
             super(itemView);
 
             question = itemView.findViewById(R.id.question_textview);
-            optionsLayout = itemView.findViewById(R.id.options_layout);
+            rootLayout = (LinearLayout) itemView;
             submitButton = itemView.findViewById(R.id.submit_button);
             removeVotesButton = itemView.findViewById(R.id.remove_vote_button);
             errorTooManySelected = itemView.findViewById(R.id.error_too_many_checked);

app/src/main/java/gr/thmmy/mthmmy/viewmodel/TopicViewModel.java

@@ -5,8 +5,6 @@ import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.preference.PreferenceManager;
-import android.view.View;
-import android.widget.CheckBox;
 
 import java.util.ArrayList;
 
@@ -46,7 +44,7 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
      * holds the adapter position of the post being edited
      */
     private int postBeingEditedPosition;
-    private ArrayList<Integer> selectedVoteIndices;
+    private ArrayList<Integer> selectedVoteIndices = new ArrayList<>();
 
     private TopicTask currentTopicTask;
     private PrepareForEditTask currentPrepareForEditTask;
@@ -249,12 +247,13 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
     }
 
     public void onVoteCheckboxClicked(int index, boolean checked) {
-        if (checked) {
-            selectedVoteIndices.add(index);
-        } else {
-            selectedVoteIndices.remove(index);
-        }
+        if (checked) selectedVoteIndices.add(index);
+        else selectedVoteIndices.remove(index);
+    }
 
+    public void onRadioButtonCLicked(int index) {
+        selectedVoteIndices.clear();
+        selectedVoteIndices.add(index);
     }
 
     // <-------------Just getters, setters and helper methods below here---------------->

app/src/main/res/layout/activity_topic_poll.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
+    android:id="@+id/rootLayout"
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
     android:layout_width="match_parent"
@@ -10,12 +11,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" />
 
-    <LinearLayout
-        android:id="@+id/options_layout"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:orientation="vertical"/>
-
     <TextView
         android:id="@+id/error_too_many_checked"
         android:layout_width="wrap_content"