How to open new Activity when clicking the child element in ExpandableListView?

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How to open new Activity when clicking the child element in ExpandableListView?

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#1 by (1 votes)

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I would like to know if it is possible to open a new Activity by clicking on a child element of a ExpandableListView , keeping in mind that for each child item element it opens a specific Activity?

My layout consists of a Tablayout with Expandable List so I would like to know how to do in this layout scheme where you use fragments.

Follow my project

Java Code = Package / Screens / Adapter

Adapter class

package com.marcos.programador.projetobus.Telas;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;

import com.marcos.programador.projetobus.Cursos;
import com.marcos.programador.projetobus.R;

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

/**
 * Created by Marcos on 23/02/2017.
 */

class Adaptador extends BaseExpandableListAdapter {
    private List<String> listaGrupos;
    private HashMap<String, List<Cursos>> listaItensGrupos;
    private Context context;

    public Adaptador(Context context, List<String> grupos, HashMap<String, List<Cursos>> itensGrupos) {
        this.context = context;
        listaGrupos = grupos;
        listaItensGrupos = itensGrupos;
    }

    @Override
    public int getGroupCount() {
        return listaGrupos.size();
    }

    @Override
    public int getChildrenCount(int grupoPosicao)
    {
        return listaItensGrupos.get(getGroup(grupoPosicao)).size();
    }

    @Override
    public Object getGroup(int grupoPsicao)
    {
        return listaGrupos.get(grupoPsicao);
    }

    @Override
    public Object getChild(int grupoPosicao, int inicioPosicao)
    {
        return listaItensGrupos.get(getGroup(grupoPosicao)).get(inicioPosicao);
    }

    @Override
    public long getGroupId(int grupoPosicao)
    {
        return grupoPosicao;
    }

    @Override
    public long getChildId(int grupoPosicao, int inicioPosicao)
    {
        return inicioPosicao;
    }

    @Override
    public boolean hasStableIds()
    {
        return false;
    }

    @Override
    public View getGroupView(int grupoPosicao, boolean isExpanded, View converteVisualizacao, ViewGroup parent) {
        if(converteVisualizacao == null){
            LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(
                    Context.LAYOUT_INFLATER_SERVICE);
            converteVisualizacao = layoutInflater.inflate(R.layout.grupo, null);
        }
        TextView tvGrupo = (TextView) converteVisualizacao.findViewById(R.id.tvGrupo);
        TextView tvQtde = (TextView) converteVisualizacao.findViewById(R.id.tvQtde);
        tvGrupo.setText((String)getGroup(grupoPosicao));
        tvQtde.setText(String.valueOf(getChildrenCount(grupoPosicao)));
        return converteVisualizacao;
    }

    @Override
    public View getChildView(int grupoPosicao, int inicioPosicao, boolean finalPosicao, View converteVisualizacao, ViewGroup parent) {
        if(converteVisualizacao == null){
            LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(
                    Context.LAYOUT_INFLATER_SERVICE);
            converteVisualizacao = layoutInflater.inflate(R.layout.item_grupo,null);
        }
        TextView tvItem = (TextView) converteVisualizacao.findViewById(R.id.tvItem);
        TextView tvValor = (TextView) converteVisualizacao.findViewById(R.id.tvValor);
        Cursos cursos = (Cursos) getChild(grupoPosicao,inicioPosicao);
        tvItem.setText(cursos.getNome());
        tvValor.setText(String.valueOf(cursos.getValor()));
        return converteVisualizacao;
    }

    @Override
    public boolean isChildSelectable(int grupoPosicao, int inicioPosicao)
    {
        return false;
    }

}

Data Class

package com.marcos.programador.projetobus.Telas;

import com.marcos.programador.projetobus.Cursos;
import com.marcos.programador.projetobus.MainActivity;

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

/**
 * Created by Marcos on 23/02/2017.
 */

public class Dados extends MainActivity {

    static List<String> listaGrupos = new ArrayList<String>();
    static List<Cursos> listaItem1 = new ArrayList<Cursos>();
    static List<Cursos> listaItem2 = new ArrayList<Cursos>();
    static List<Cursos> listaItem3 = new ArrayList<Cursos>();
    static HashMap<String, List<Cursos>> listaItensGrupo = new HashMap<>();
    public  static List<String> carregaGrupo(String nome){
        listaGrupos.add(nome);
        return listaGrupos;
    }

    public static List<Cursos> carregaItem1(String nome, Double numero){
        listaItem1.add(new Cursos(nome, numero));
        return listaItem1;
    }

    public static List<Cursos> carregaItem2(String nome, Double numero){
        listaItem2.add(new Cursos(nome, numero));
        return listaItem2;
    }

    public static List<Cursos> carregaItem3(String nome, Double numero){
        listaItem3.add(new Cursos(nome, numero));
        return listaItem3;
    }

    public static HashMap<String, List<Cursos>> carregaRelacionamentos(){
        listaItensGrupo.put(listaGrupos.get(0), listaItem1);
        listaItensGrupo.put(listaGrupos.get(1), listaItem2);
        listaItensGrupo.put(listaGrupos.get(2), listaItem3);
        return listaItensGrupo;
    }
}

Screen class2

package com.marcos.programador.projetobus.Telas;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ExpandableListView;

import com.marcos.programador.projetobus.R;


/**
 * Created by Marcos on 28/02/2017.
 */

public class tela2 extends android.support.v4.app.Fragment {
    ExpandableListView lista;
    ArrayAdapter<String> adapter;

    public static tela2 novaInstancia() {return  new tela2();}
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        View tela=inflater.inflate(R.layout.tela2,null);
        inicializaObjetos(tela);
        carregaLista();
        return tela;
    }
    // Inicializando Objetos
    private void  inicializaObjetos(View tela)
    {
        lista=(ExpandableListView) tela.findViewById(R.id.listaCursos);
    }
    //Carrega Lista
    private void carregaLista()
    {
        //Criando os grupos
        Dados.carregaGrupo("Android Studio");
        Dados.carregaGrupo("Java Netbeans");
        Dados.carregaGrupo("PHP");

        //Criando os itens do grupo Android Studio
        Dados.carregaItem1("Manhã", 0.0);
        Dados.carregaItem1("Tarde", 0.0);
        Dados.carregaItem1("Noite", 0.0);

        //Criando os itens do grupo Java Netbeans
        Dados.carregaItem2("Manhã", 0.0);
        Dados.carregaItem2("Tarde", 0.0);
        Dados.carregaItem2("Noite", 0.0);

        //Criando os itens do grupo PHP
        Dados.carregaItem3("Manhã", 0.0);
        Dados.carregaItem3("Tarde", 0.0);
        Dados.carregaItem3("Noite", 0.0);

        //Criando Relacionamento dos grupos com seus itens
        Dados.carregaRelacionamentos();

        // Criando um adaptador com os dados acima
        Adaptador adaptador = new Adaptador(getActivity(), Dados.listaGrupos, Dados.listaItensGrupo);
        //adapter=new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1, armazena);

        //Definindo o adaptador
        lista.setAdapter(adaptador);

    }
    @Override
    public String toString(){ return "Horarios";}

}

MainActivity class

package com.marcos.programador.projetobus;

import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;

import com.marcos.programador.projetobus.Adaptador.QuadroAdaptador;
import com.marcos.programador.projetobus.Telas.tela1;
import com.marcos.programador.projetobus.Telas.tela2;
import com.marcos.programador.projetobus.Telas.tela3;

public class MainActivity extends AppCompatActivity implements 
TabLayout.OnTabSelectedListener {
    private TabLayout Guias;
    private ViewPager abreTela;
    int atualPosicao=0;
    @Override
    protected void onCreate(Bundle saveInstanceState){
        super.onCreate(saveInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.Ferramenta);
        setSupportActionBar(toolbar);
        //Abre páginas da guia
        abreTela = (ViewPager) findViewById(R.id.Paginas);
        carregaPaginas();
        //Configuração Guia
        Guias = (TabLayout) findViewById(R.id.Guias);
        Guias.setTabGravity(TabLayout.GRAVITY_FILL);
        Guias.setupWithViewPager(abreTela);
        Guias.addOnTabSelectedListener(this);
    }

    //Preencher páginas
    private void carregaPaginas()
    {
        QuadroAdaptador quadro=new QuadroAdaptador(getSupportFragmentManager());
        quadro.addPage(tela1.novaInstancia());
        quadro.addPage(tela2.novaInstancia());
        quadro.addPage(tela3.novaInstancia());
        abreTela.setAdapter(quadro);
    }

    @Override
    public void onTabSelected(TabLayout.Tab tab) {
        abreTela.setCurrentItem(atualPosicao=tab.getPosition());
    }

    @Override
    public void onTabUnselected(TabLayout.Tab tab) {

    }

    @Override
    public void onTabReselected(TabLayout.Tab tab) {

    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.marcos.programador.projetobus.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="@dimen/appbar_padding_top"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|enterAlways"
            app:popupTheme="@style/AppTheme.PopupOverlay"
            android:id="@+id/Ferramenta">

        </android.support.v7.widget.Toolbar>

        <android.support.design.widget.TabLayout
            android:id="@+id/Guias"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/Paginas"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

</android.support.design.widget.CoordinatorLayout>

grupo.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.marcos.programador.projetobus.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="@dimen/appbar_padding_top"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|enterAlways"
            app:popupTheme="@style/AppTheme.PopupOverlay"
            android:id="@+id/Ferramenta">

        </android.support.v7.widget.Toolbar>

        <android.support.design.widget.TabLayout
            android:id="@+id/Guias"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/Paginas"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

</android.support.design.widget.CoordinatorLayout>

item_group.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/cardview_shadow_start_color"
    android:orientation="horizontal">

    <TextView
        android:id="@+id/tvItem"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:layout_weight="7"
        android:text="Item"
        android:textColor="@android:color/black" />

    <TextView
        android:id="@+id/tvValor"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:layout_weight="3"
        android:text="Valor"
        android:textColor="@android:color/black" />
</LinearLayout>

screen2.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <ExpandableListView
                android:id="@+id/listaCursos"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />
        </LinearLayout>

    </android.support.v7.widget.CardView>
</LinearLayout>

java android

asked by anonymous 29.03.2017 / 21:36

1 answer

Changing a table How to tell if Heroku is out? [closed]

score 1 · Answer 1

You need to set a listener in the ExpandableListView. Create a listener in your expandableListView:

mListView = (ExpandableListView) view.findViewById(R.id.contact_list);
mListView.setOnChildClickListener(new OnChildClickListener() {

    @Override
    public boolean onChildClick(ExpandableListView parent, View v,
            int groupPosition, int childPosition, long id) {

        switch(childPosition){

            case 0:
               //TODO Faça sua chamada da activity aqui

            break;

            case 1:
                //TODO Faça sua chamada da activity aqui

            break;


        }
        return true;
    }
});