android studio has hidden elements in activity - android-studio

Question

|I just added new activity (chose settings template) when i created my app in my setting page there are some elements that aren't exist in my editor nor in xml code.
Screenshots
In App
In Editor
Code
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/settings">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="4sp"
android:layout_marginRight="4sp"
android:weightSum="3"
android:gravity="center"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RadioGroup
android:id="#+id/appLang"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_marginTop="35dp"
android:layout_marginEnd="35dp"
android:layout_marginRight="35dp"
android:layout_marginStart="35dp"
android:layout_marginLeft="35dp"
android:orientation="horizontal">
<TextView
android:id="#+id/applangtext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/applangtextstring" />
<RadioButton
android:id="#+id/radio_indo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onRadioButtonClicked"
android:text="#string/indoLang" />
<RadioButton
android:id="#+id/radio_english"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onRadioButtonClicked"
android:text="#string/englishLang" />
</RadioGroup>
<RadioGroup
android:id="#+id/learnLang"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_marginTop="35dp"
android:layout_marginEnd="35dp"
android:layout_marginRight="35dp"
android:layout_marginStart="35dp"
android:layout_marginLeft="35dp"
android:orientation="horizontal">
<TextView
android:id="#+id/learnlangtext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/learnLangText" />
<RadioButton
android:id="#+id/learn_radio_indo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onRadioButton2Clicked"
android:text="#string/indoLang" />
<RadioButton
android:id="#+id/learn_radio_english"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onRadioButton2Clicked"
android:text="#string/englishLang" />
</RadioGroup>
</LinearLayout>
</LinearLayout>
</RelativeLayout>
Any idea?

Answer 1

Solved
There was some extra lines in my settingsActivity file in ocCreate() function after removing them and rebuild my app UI issue was solved.
My current onCreate() function is like this now:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_activity);
// here was some lines regarding to Topbar
}
Note: what was connection between topbar(toolbar) and UI issue
personally i don't know but my problem solved after removing that and
that's all matter :)