Android (Java) - Layout is getting cut off at the edges

I'm pretty new to Android Studio so this might be a simple Solution (i hope).

I got this Detail View of an Item but even though the Layout Width and Height are set on "match_parent" it doesn't fit the Screen of my Phone. It does not matter which Layout or .xml I use it is still cropped (linear, relative, constraint), so I guess its something in the code.

And heres the Code where i think the Problem is:

    public class RecyclerViewAdapterBiography extends RecyclerView.Adapter < RecyclerViewAdapterBiography.MyViewHolder > {
private Context myContext;
private List < TimeStamp > myData;
private Dialog myDialog;
public RecyclerViewAdapterBiography(Context myContext, List < TimeStamp > myData) {
this.myContext = myContext;
this.myData = myData;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View v;
v = LayoutInflater.from(myContext).inflate(R.layout.biography_item, parent, false);
final MyViewHolder viewHolder = new MyViewHolder(v);
// Detail View of the Biography TimeStamps
// makes the background of the dialog box transparent
// myDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
// OnClickListener for the different Items in the View (to see the detail view)
viewHolder.biography_item_id.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
myDialog = new Dialog(myContext);
myDialog.setContentView(R.layout.biography_detail);
TextView tv_dialog_title = (TextView) myDialog.findViewById(R.id.bio_details_title);
TextView tv_dialog_text = (TextView) myDialog.findViewById(R.id.bio_details_desc);
tv_dialog_title.setText(myData.get(viewHolder.getAdapterPosition()).getTitle());
tv_dialog_text.setText(myData.get(viewHolder.getAdapterPosition()).getDialog());
/*
Toast.makeText(myContext,"Test Click" + String.valueOf
(viewHolder.getAdapterPosition()), Toast.LENGTH_SHORT).show();
*/
myDialog.show();
}
});
return viewHolder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
holder.tv_year.setText(myData.get(position).getYear());
holder.tv_title.setText(myData.get(position).getTitle());
}
@Override
public int getItemCount() {
return myData.size();
}
public static class MyViewHolder extends RecyclerView.ViewHolder {
private LinearLayout biography_item_id;
private TextView tv_year;
private TextView tv_title;
public MyViewHolder(View itemView) {
super(itemView);
biography_item_id = (LinearLayout) itemView.findViewById(R.id.biography_item_id);
tv_year = (TextView) itemView.findViewById(R.id.biography_year);
tv_title = (TextView) itemView.findViewById(R.id.biography_title);
}
}
}
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fcfcfc">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="10dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:layout_width="125dp"
android:layout_height="175dp"
android:background="#2d2d2d"
android:id="@+id/item_biography_img"
android:scaleType="centerCrop"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Title"
android:id="@+id/bio_details_title"
android:textStyle="bold"
android:textSize="24sp"
android:layout_marginTop="10dp"/>
<TextView
android:id="@+id/bio_details_desc"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp"
android:layout_marginTop="10dp"
android:text="Description" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>

</RelativeLayout>

I basically tried everything and rn I'm just a/b with stuff I found on the internet to solve this problem, but I can't find any solution

Dialogs are meant to be like that - they pop up over your app content, only take up part of the screen, and you can't interact with the rest of the app when they're displayed.

Best take a look at the docs - like it says you're not really meant to use the Dialog class directly, the common way is to use an AlertDialog.Builder and call the setup methods to define the title, buttons etc. One of the methods is setView() which is how you can put a custom layout in there, which you can get by inflating a layout first:

view = activity.layoutInflater.inflate(R.layout.biography_detail, null)

Dialogs have their own layout with all the rounded corners and shadowing and such, so when you just do setContentView you're replacing all that styling and you generally don't want that!

If you don't want that style, or you want more control (like making it full-screen) then you should create a DialogFragment - there's a good guide here (personally I think that site's really useful for overviews of topics)

There's some stuff on full-screen Dialogs near the end - basically a DialogFragment works like a Fragment, except you implement an onCreateDialog method instead of onCreate, and that's where you configure the Dialog the system has created for you. When you want to show it, you create an instance and use the FragmentManager to show it. The first example in the link explains it, so I won't paste it here!