how to make a button visible / invisible in an if else loop

I'm building an android app (similar to Discord for those who know it). All channels are displayed on the homepage, each channel has attributes (name, author, mine; what I have to do is display a DETAILS button only next to my channels (and therefore if the mine attribute is equal to "t"). The problem is that if I write b.setVisibility (View.VISIBLE) or b.setVisibility (View.GONE) the whole line disappears and therefore also the channel name.

Main Activity:

 for(int i = 0; i < canaliJSON.length(); i ++){ 
                JSONObject obj = (JSONObject) canaliJSON.get(i); 
                String title = obj.getString("ctitle");
                String property = obj.getString("mine");

                final Button buttonHv = (Button) findViewById(R.id.hv);
                View b = findViewById(R.id.hv);
                        if (property.equals("t")) {
                            Log.d(TAG,"myChannel");
                            b.setVisibility(View.VISIBLE);
                        }
                        else {
                            Log.d(TAG,"not myChannel");
                            buttonHv.setVisibility(View.GONE);
                        }

                canali.add(new Canale(title, property + " "+ buttonHv));
            }

MainActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:orientation="horizontal"
    android:minHeight="?android:attr/listPreferredItemHeight"
    android:padding="16dp">

    <!--Nome canale nella homepage-->

    <TextView
        android:id="@+id/canale_name"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_weight="1"
        android:textColor="@color/black" />


    <Button
        android:id="@+id/hv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right"
        android:visibility="invisible"/>
        android:text="HV" />


</LinearLayout>