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Android java - dynamically add ImageViews in LinearLayout

i would like to add to a LinearLayout some imageViews dynamically in my app.
My following code doesn't show errors and prints what it is supposed to on logcat each time an ImageView is added from java code.
My problem is that when i run the app the images don't appear on screen....any idea where i am doing wrong ?
thanks a lot.
public class MesListesFragment extends Fragment {
private RecyclerView mes_listes_recyclerView;
private ArrayList<ListItem> liste_items;
private LinearLayout list_card_categories;
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.mes_listes_fragment, container, false);
View view2 = inflater.inflate(R.layout.list_item, container, false);
mes_listes_recyclerView = view.findViewById(R.id.mes_listes_recyclerView);
list_card_categories = view2.findViewById(R.id.list_card_recyclerView);
liste_items = new ArrayList<>();
for (int i = 0; i < 10; i ++){
liste_items.add(new ListItem("Liste des ploucs", "18 Août 198" + i));
}
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
mes_listes_recyclerView.setLayoutManager(linearLayoutManager);
mes_listes_recyclerView.setAdapter(new ListViewAdapter(getContext(), liste_items));
for (int i = 0; i < 8; i++){
ImageView image = new ImageView(getContext());
image.setImageResource(R.drawable.user);
list_card_categories.addView(image);
Log.d("view created", "...");
}
return view;
}
}
Here is the xml, the file's called list_item.xml :
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_marginHorizontal="10dp"
android:layout_marginTop="10dp"
app:cardCornerRadius="10dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/list_card_first_container"
android:layout_width="match_parent"
android:layout_height="100dp"
android:baselineAligned="false"
android:orientation="horizontal"
android:weightSum="100">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="50"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="#+id/list_card_textView_nom_liste"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Nom de la liste"></TextView>
<TextView
android:id="#+id/list_card_textView_date_liste"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Date liste"></TextView>
</LinearLayout>
<HorizontalScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="50">
<LinearLayout
android:id="#+id/list_card_recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="50"
android:gravity="center"
android:orientation="horizontal">
</LinearLayout>
</HorizontalScrollView>
</LinearLayout>
<LinearLayout
android:id="#+id/list_card_second_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/list_card_first_container"
android:gravity="center"
android:orientation="horizontal"
android:paddingVertical="5dp">
<Button
android:id="#+id/list_card_button_editer"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_marginEnd="20dp"
android:background="#color/bleu_fb"
android:text="#string/editer"></Button>
<Button
android:id="#+id/list_card_button_supprimer"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:background="#android:color/holo_red_light"
android:text="#string/supprimer"></Button>
</LinearLayout>
</RelativeLayout>
</androidx.cardview.widget.CardView>

TextView not appearing in embedded LinearLayout

I am creating a simple tasklist app, and I want to programmatically add a TextView to an embedded LinearLayout. However, it is not showing up for some reason.
I try to add the TextView in MainActivity (irrelevant code removed).
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
setIntent(intent);
processExtraData();
}
private void processExtraData(){
Integer hours = 4;
Integer minutes = 35;
Integer seconds = 0;
LinearLayout linearLayout = (LinearLayout) findViewById(R.id.linlayout);
TextView txt1 = new TextView(this);
final float scale = this.getResources().getDisplayMetrics().density;
int pixels = (int) (64 * scale + 0.5f);
ViewGroup.LayoutParams params = new LinearLayout.LayoutParams(0, pixels, 1f);
txt1.setLayoutParams(params); txt1.setText(hours.toString()+":"+minutes.toString()+":"+seconds.toString());
linearLayout.addView(txt1);
}
The embedded LinearLayout is declared in activity_main:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
tools:context=".MainActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Super Reminder App!"
android:textAppearance="#style/TextAppearance.AppCompat.Large" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:layout_marginBottom="12dp"
android:orientation="horizontal">
<EditText
android:id="#+id/taskAdd"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="3.5"
android:hint="New Task" />
<Button
android:id="#+id/add"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1.5"
android:text="Add Task" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="12.5"
android:orientation="horizontal">
<ListView
android:id="#+id/tasks"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2.5"/>
<LinearLayout
android:id="#+id/linlayout"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:orientation="vertical"/>
</LinearLayout>
<Button
android:id="#+id/clearButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="Clear All" />
</LinearLayout>
I have already tested and made sure that onNewIntent and processExtraData are called. No errors are thrown either. Could this be a GUI issue? Any help would be greatly appreciated.

How to fix my LinearLayout to scroll down when content exceeds view

I am adding views to my adapter dynamically and when the views exceeds the screen boundaries I am unable to see the full views.
I have tried android:isScrollContainer="true" and android:scrollbars="vertical" without any luck.
public void onAddField(View v) {
final LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View rowView = inflater.inflate(R.layout.field, null);
spin = rowView.findViewById(R.id.type_spinner2);
weightLayout = rowView.findViewById(R.id.myLayout);
getdata();
spin.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item, arrayList2));
parentLinearLayout.addView(rowView, parentLinearLayout.getChildCount() - 1);
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#E5E5E5"
android:orientation="vertical"
android:scrollbars="vertical"
android:isScrollContainer="true">

Try to use this:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="50dp"
android:text="TextView" />
</LinearLayout>
</ScrollView>
</LinearLayout>
This way your ScrollView will expand with your LinerLayout.

linear layout java and xml

I'm just trying to add spinners dynamicallyand I found my way here Add Spinner dynamically in a loop
that works good but my issue is the view takes place instead of my original layout (a header, a footer and an image view).
I would like to place it in a specific layout in the xml file, between the header and the footer for example.
Is there a way to do this?
my code
protected void onCreate(Bundle savedInstanceState) {
Intent i = getIntent();
conteneur = "container No : " + i.getStringExtra("container");
conteneur_s = i.getStringExtra("container");
fichano = i.getStringExtra("fichano");
pos = i.getIntExtra("pos", 0);
latitude = i.getDoubleExtra("geolat", 0);
longitude = i.getDoubleExtra("geolon", 0);
volume = i.getStringExtra("volume");
saver = i.getStringExtra("saver");
poids = i.getStringExtra("poids");
tel = i.getStringExtra("telpass");
driver = i.getStringExtra("driverpass");
tour = i.getStringExtra("tour");
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_parc);
container = (TextView) findViewById(R.id.nom);
container.setText(conteneur);
RelativeLayout lr = (RelativeLayout) findViewById(R.id.full_layout);
GradientDrawable gd = new GradientDrawable(
GradientDrawable.Orientation.TOP_BOTTOM,
new int[] {0xFFFFFFFF,0xFFB0B0B0});
gd.setCornerRadius(0f);
lr.setBackground(gd);
showImg = (ImageView) findViewById(R.id.imageView1);
String pathparc = Environment.getExternalStorageDirectory() + "/SmartCollecte/PARC/PARAM";
File f = new File(pathparc);
final File file[] = f.listFiles();
LinearLayout layout = new LinearLayout(MAIN_parcActivity.this);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(140, 398);
layoutParams.setMargins(24, 50, 24, 0);
layout.setOrientation(LinearLayout.VERTICAL);
for (int j = 0; j < file.length; j++) {
String[] namewext;
namewext = FilenameUtils.removeExtension(file[j].getName()).split("_");
Toast.makeText(getApplicationContext(),namewext[1],Toast.LENGTH_SHORT).show();
Spinner spinner = new Spinner(getApplicationContext());
String[]choix = new String[]{"choisissez"+j, "Propreté", "Détérioration", "Accès", "Maintenance", "autre"};
List<String> str = new ArrayList<>();
str.add(namewext[1]);
Collections.addAll(str,choix);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(MAIN_parcActivity.this,
android.R.layout.simple_spinner_item, str);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
layout.addView(spinner);
setContentView(layout,layoutParams);
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/full_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#909090"
>
<LinearLayout
android:id="#+id/header"
android:layout_width="fill_parent"
android:layout_height="60sp"
android:orientation="horizontal"
android:background="#E25D63"
android:layout_alignParentTop="true"
android:weightSum="3">
<ImageView
android:layout_width="60sp"
android:layout_height="60sp"
android:gravity="left"
android:src="#drawable/backinblack"
android:background="#CFCFCF"
android:layout_weight="0.20"
android:onClick="fermer"
/>
<TextView
android:id="#+id/nom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#220c0c"
android:text="Tournée"
android:textStyle="bold"
android:paddingLeft="30dp"
android:paddingRight="30dp"
android:paddingTop="4dp"
android:paddingBottom="4dp"
android:layout_weight="0.80"
android:background="#E25D63"
android:layout_gravity="center_vertical"
>
</TextView>
<ImageView
android:layout_width="60dp"
android:layout_height="60dp"
android:src="#drawable/anom_ctn"
android:layout_weight="0.20"
android:background="#CFCFCF"
android:layout_gravity="center_vertical"
/>
</LinearLayout>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/scroll"
android:layout_below="#+id/header"
android:layout_above="#+id/footer"
android:fillViewport="true">
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:orientation="vertical">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id = "#+id/spin"
android:orientation="vertical"
android:padding="10dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:gravity="center_horizontal"
android:text="Etat de parc"
android:textSize="25sp"
android:layout_marginBottom="5dp"/>
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id = "#+id/spin2"
android:orientation="vertical"
android:padding="10dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/spin">
<Spinner
android:id="#+id/gametime"
android:layout_marginTop="10dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:prompt="#string/anomalie"
android:visibility="visible"/>
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/boutons"
android:orientation="vertical"
android:padding="10dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/spin2">
</LinearLayout>
<ImageView
android:id="#+id/imageView1"
android:layout_below="#id/boutons"
android:layout_margin="40sp"
android:adjustViewBounds="true"
android:layout_centerHorizontal="true"
android:layout_height="fill_parent"
android:layout_width="wrap_content"></ImageView>
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/footer"
android:layout_width="fill_parent"
android:layout_height="60sp"
android:orientation="horizontal"
android:background="#cfcfcf"
android:weightSum="3"
android:layout_alignParentBottom="true"
>
<ImageView
android:layout_width="60dp"
android:layout_height="60dp"
android:src="#drawable/photo"
android:layout_weight="0.80"
android:paddingRight="30sp"
android:onClick="photo"
android:clickable="true"
/>
<View android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1.40"/>
<ImageView
android:layout_width="60dp"
android:layout_height="60dp"
android:src="#drawable/validation_test"
android:layout_weight="0.80"
android:paddingTop="10sp"
android:paddingLeft="25sp"
android:onClick="enregistrer"
android:clickable="true"
/>
</LinearLayout>

I'm not terribly sure here, I wonder if it is replacing the view because you aren't setting a unique ID for each view? That or failing to call layout.invalidate() after finishing a run through the loop.

Increasing scrollview by adding buttons in a relativelayout (or linearlayout ) from bottom to top

Could really use some help with this one.
I'm trying to start with a single button at the bottom of my screen. When my counter++ button is clicked, a second button will be dynamically created above the button at the bottom of the screen. I was able to get this far, the problem is that the height of my scrollview doesn't increase when my buttons reach the top of the screen. Please see my example below.
Example
I'm assuming the scrollview only increases when items are added below the current view although if that's the case, is there no way I can create several buttons starting at the bottom going upwards?
Here my code.
XML:
<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="wrap_content"
android:layout_height="wrap_content"
tools:context="com.example.bbetzner.ttt.Map">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
>
<RelativeLayout
android:id="#+id/layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<Button
android:id="#+id/count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="count++"
/>
<Button
android:id="#+id/floor0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="0"
/>
</RelativeLayout>
</ScrollView>
</RelativeLayout>
Java:
public void addfloor(){
Button myButton = new Button(this);
myButton.setText(""+floor);
margincount += 100;
RelativeLayout ll = findViewById(R.id.layout);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.ABOVE, R.id.floor0);
lp.addRule(RelativeLayout.CENTER_HORIZONTAL);
lp.bottomMargin = margincount;
ll.addView(myButton, lp);
}
I've also tried doing this in a linear layout to see if the scrollview would increase but I couldn't figure out how to stack buttons from bottom to top in a linear layout. :S
Thanks in advance, yall are awesome!

#Texas use below code using that you are achieving what you want:
<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="wrap_content"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<Button
android:id="#+id/count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="count++" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:scrollbars="vertical">
<LinearLayout
android:id="#+id/lladdViews"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:gravity="bottom"
android:orientation="vertical">
<Button
android:id="#+id/floor0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="0" />
</LinearLayout>
</ScrollView>
</LinearLayout>
and here is Java File:
public class SampleActivity extends Activity {
LinearLayout lladdViews;
Button count;
int floor = 0;
private int margincount = 0;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sample_activity);
lladdViews = (LinearLayout) findViewById(R.id.lladdViews);
count = (Button) findViewById(R.id.count);
count.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
addfloor();
}
});
}
public void addfloor() {
Button myButton = new Button(this);
myButton.setText("" + floor);
margincount += 10;
RelativeLayout ll = new RelativeLayout(this);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.ABOVE, R.id.floor0);
lp.addRule(RelativeLayout.CENTER_HORIZONTAL);
lp.bottomMargin = margincount;
ll.addView(myButton, lp);
lladdViews.addView(ll);
}
}

Here is your designing part happy coding.....
<LinearLayout 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:orientation="vertical"
>
<LinearLayout
android:id="#+id/layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
>
<Button
android:id="#+id/count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="count++"
/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
>
<LinearLayout
android:id="#+id/layout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
>
<Button
android:id="#+id/floor0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="0"
/>
<Button
android:id="#+id/floor1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="7"
/>
<Button
android:id="#+id/floor2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="6"
/>
<Button
android:id="#+id/floor3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="5"
/>
<Button
android:id="#+id/floor4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="4"
/>
<Button
android:id="#+id/floor5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="0"
/><Button
android:id="#+id/floor6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="3"
/><Button
android:id="#+id/floor7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="2"
/>
<Button
android:id="#+id/floor8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="1"
/>
<Button
android:id="#+id/floor9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="0"
/>
</LinearLayout>
</ScrollView>
</LinearLayout>