package com.example.tchatocampus;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.addDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; 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) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_aspect) {
            // Handle the camera action

        } else if (id == R.id.nav_help) {

        } else if (id == R.id.nav_cgu) {

        } else if (id == R.id.nav_about) {

        } else if (id == R.id.nav_version) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}


package elv.iso.com.expandablelistview;


        import android.os.Bundle;
        import android.view.View;
        import android.widget.ExpandableListAdapter;
        import android.widget.ExpandableListView;
        import android.widget.Toast;

        import java.util.ArrayList;
        import java.util.HashMap;
        import java.util.List;

        import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private ExpandableListView expandableListView;
    private ExpandableListAdapter expandableListAdapter;
    private List<String> expandableListNombres;
    private HashMap<String, Contacto> listaContactos;
    private int lastExpandedPosition = -1;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        init();

        expandableListView.setAdapter(expandableListAdapter);

        expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
            @Override
            public void onGroupExpand(int groupPosition) {
                if(lastExpandedPosition != -1 && groupPosition != lastExpandedPosition){
                    expandableListView.collapseGroup(lastExpandedPosition);
                }
                lastExpandedPosition = groupPosition;
            }
        });

        /**
         expandableListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {
        @Override
        public void onGroupCollapse(int groupPosition) {
        Toast.makeText(getBaseContext(),"List Collapsed:" +
        expandableListNombres.get(groupPosition),Toast.LENGTH_SHORT).show();
        }
        });
         expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
        @Override
        public boolean onChildClick(ExpandableListView parent, View v,
        int groupPosition, int childPosition, long id) {
        Toast.makeText(getBaseContext(),
        expandableListNombres.get(groupPosition) +
        " ---> " + listaContactos.get(expandableListNombres.get(groupPosition))
        ,Toast.LENGTH_SHORT).show();
        return false;
        }
        });
         */

    }

    private void init() {
        this.expandableListView = findViewById(R.id.expandableListView);
        this.listaContactos = getContactos();
        this.expandableListNombres = new ArrayList<>(listaContactos.keySet());
        this.expandableListAdapter = new CustomExpandableListAdapter(this,
                expandableListNombres, listaContactos);

    }


    private HashMap<String, Contacto> getContactos() {
        HashMap<String, Contacto> listaC = new HashMap<>();

        listaC.put("Juan", new Contacto("111-111-111",
                "juan@correo.com", "Calle 1, 11 - 4D", R.drawable.img_11));
        listaC.put("Sara", new Contacto("222-222-222",
                "sara@correo.com", "Calle 2, 1 - 1A", R.drawable.img_22));
        listaC.put("Raquel", new Contacto("333-333-333",
                "raquel@correo.com", "Calle 3, 3 - 6B", R.drawable.img_33));
        listaC.put("Juan 2", new Contacto("444-444-444",
                "juan@correo.com", "Calle 1, 11 - 4D", R.drawable.img_11));
        listaC.put("Sara 2", new Contacto("555-555-555",
                "sara@correo.com", "Calle 2, 1 - 1A", R.drawable.img_22));
        listaC.put("Raquel 2", new Contacto("666-666-666",
                "raquel@correo.com", "Calle 3, 3 - 6B", R.drawable.img_33));
        listaC.put("Juan 3", new Contacto("777-777-777",
                "juan@correo.com", "Calle 1, 11 - 4D", R.drawable.img_11));
        listaC.put("Sara 3", new Contacto("888-888-888",
                "sara@correo.com", "Calle 2, 1 - 1A", R.drawable.img_22));
        listaC.put("Raquel 3", new Contacto("999-999-999",
                "raquel@correo.com", "Calle 3, 3 - 6B", R.drawable.img_33));


        return listaC;
    }

}