I am doing a project which consists of a list of students with assistance The problem is that when loading the List View not all the elements appear in it, only 2. what i wnat to show is a list view with 2 spinner and 1 textview on every text view has de name of students, the array of this is "noms"
MainActivity
package com.example.llista_alumnes;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toolbar;
import java.util.ArrayList;
import java.util.Arrays;
public class MainActivity extends Activity {
public final static int REQUEST_CODE_B = 1;
public final static int REQUEST_CODE_C = 2;
private TextView tv1;
private ListView lv1;
private Spinner spinner ;
private Toolbar toolbar;
private Custom_listview_adapter adapter;
private ArrayList noms =new ArrayList <String> (Arrays.asList("Samuel", "Valentina", "Santiago", "Alejandro", "Valeria", "Benjamin",
"Gerardo", "Carlos", "David", "Sofía"));
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
inicialitza();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the main; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item){
switch (item.getItemId()){
case R.id.add_estudiants:
addEstudiant();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void inicialitza() {
tv1 = findViewById(R.id.tv1);
lv1 = findViewById(R.id.lv1);
toolbar = findViewById(R.id.toolbar);
setActionBar(toolbar);
adapter = new Custom_listview_adapter(this,R.layout.adapter_list_view, R.id.lv1, noms);
lv1.setAdapter(adapter);
}
void addEstudiant(){
Intent intent = new Intent(getBaseContext(), second_activity.class );
startActivityForResult(intent, REQUEST_CODE_B);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch(requestCode) {
case REQUEST_CODE_B:
noms.add(data.getStringExtra("name"));
adapter.notifyDataSetChanged();
break;
}
}
}
Spinner Adapter
package com.example.llista_alumnes;
import android.app.Activity;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.SpinnerAdapter;
import android.widget.TextView;
import java.util.ArrayList;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
// aquest custom adapter es pel list_view no pel spinner
// aqui pots interectuar amb spinner usant al funcio del getview
public class Custom_spinner_adapter extends ArrayAdapter implements SpinnerAdapter {
private Context context;
private int textResourceId;
private int resource;
private String [] data;
public Custom_spinner_adapter(Context context, int resource, int textViewResourceId, String [] data) {
super(context, resource, textViewResourceId, data);
this.context = context;
this.textResourceId = textViewResourceId;
this.resource = resource;
this.data = data;
}
@Override
public int getCount(){
return this.data.length;
}
@Override
public Object getItem(int position){
return this.data[position];
}
@Override
public long getItemId( int position){
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
return init_view(position,convertView,parent);
}
@Override
public View getDropDownView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
return init_view(position,convertView,parent);
}
public View init_view(int position, View convertView, ViewGroup parent){
View view = convertView;
if (view == null){
view = ((Activity) context).getLayoutInflater().inflate( R.layout.adapter_spinner, null);
}
TextView spinner = view.findViewById(R.id.tv_spinner);
spinner.setText(data[position]);
return view;
}
}
List view Adapter
package com.example.llista_alumnes;
import android.app.Activity;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import java.util.ArrayList;
// aquest custom adapter es pel list_view no pel spinner
// aqui pots interectuar amb spinner usant al funcio del getview
public class Custom_listview_adapter extends ArrayAdapter {
Context context;
private String [] spinner_array = new String [] {"ha vingut","Ha faltat"};
private String [] notas_array = new String [] {"0","1","2","3","4","5","6","7","8","9","10"};
private int textResourceId;
private int resource;
private ArrayList<String> data;
public Custom_listview_adapter(Context context, int resource, int textViewResourceId, ArrayList data){
super(context,resource,textViewResourceId,data);
this.context = context;
this.textResourceId = textViewResourceId;
this.resource = resource;
this.data = data;
}
@Override
public int getCount(){
return this.spinner_array.length;
}
@Override
public Object getItem(int position){
return this.spinner_array[position];
}
@Override
public long getItemId( int position){
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
View view = convertView;
if (view == null){
view = ((Activity) context).getLayoutInflater().inflate( R.layout.adapter_list_view, null);
}
TextView textView = (TextView) view.findViewById(R.id.name);
Spinner spinner = (Spinner) view.findViewById(R.id.spinner);
Spinner notas = (Spinner) view.findViewById(R.id.notas);
textView.setText(data.get(position));
Custom_spinner_adapter adapter_notas = new Custom_spinner_adapter(context, R.layout.adapter_spinner,R.id.notas, this.notas_array);
notas.setAdapter(adapter_notas);
Custom_spinner_adapter adapter = new Custom_spinner_adapter(context, R.layout.adapter_spinner,R.id.spinner, this.spinner_array);
spinner.setAdapter(adapter);
return view;
}
}
