Android #5

Neste artigo vamos tratar a pesquisa e adicionar um menu para acessar uma outra tela.

O arquivo strings.xml está assim no momento.

<resources>
    <string name="app_name">Onde Treinar - micheladrianomedeiros.com.br</string>
    <string name="app_name_reviews">Onde Treinar - Reviews</string>
    <string name="app_name_review">Onde Treinar - Review</string>
    <string name="app_short_name">Onde Treinar</string>
    <string name="menu_get_reviews">Reviews</string>
    <string name="menu_web_review">Review Completo</string>
    <string name="menu_map_review">Local no Mapa</string>
    <string name="menu_call_review">Telefone</string>
    <string name="menu_change_criteria">Mudar Review</string>
    <string name="menu_get_next_page">Próxima Página</string>
    <string name="intro_blurb_criteria">Acesso ao Review</string>
    <string name="intro_blurb_detail">Detalhes do Review</string>
    <string name="alert_label">Você deve digitar o nome ou cidade antes de fazer uma pesquisa</string>
    <string name="location_not_supplied_message"></string>

    <string-array name="types_gym">
        <item>Todos</item>
        <item>Academia de Dança</item>
        <item>Academia de Luta</item>
        <item>Academia de Musculação</item>
        <item>Academia de Nicho</item>
        <item>Artes Marciais</item>
        <item>Ballet Fitness</item>
        <item>Boutique</item>
        <item>Crossfit</item>
        <item>Estúdio de Pilates</item>
        <item>Full Service</item>
        <item>Hidroginástica</item>
        <item>Low Cost</item>
        <item>Muay Thai</item>
        <item>Samba</item>
        <item>Spinning</item>
        <item>Zumba</item>
    </string-array>
</resources>

Crie uma activity com o nome ReviewList e na view da ReviewList digite o seguinte código:

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

    <ListView
        android:id="@android:id/list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:drawSelectorOnTop="false" />

    <TextView
        android:id="@+id/empty"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:text="" />
</LinearLayout>

Agora no arquivo MainActivity.java vamos adicionar mais código.

Primeiro ao pesquisar academia vamos mostrar uma mensagem se o campo de academia ou local estiver vazio.

A MainActivity.java ficou assim:

package br.com.micheladrianomedeiros.ondetreinar;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private Spinner spinnerTypesGym;
    private Button buttonSearchGym;
    private EditText editTextSearchGym;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editTextSearchGym = findViewById(R.id.search_gym);
        spinnerTypesGym = findViewById(R.id.spinner_type_gym);
        buttonSearchGym = findViewById(R.id.button_search_gym);
        buttonSearchGym.setOnClickListener(buttonClickListener);
    }

    private View.OnClickListener buttonClickListener = new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            switch (v.getId()) {
                case R.id.button_search_gym:
                    boolean b = handleSearch();
                    if (b) {
                        Log.i("procurando", editTextSearchGym.getText().toString());
                        Log.i("tipo academia", spinnerTypesGym.getSelectedItem().toString());
                        Log.i("Buscar", "Vamos fazer a busca");
                    }
                    break;
                case View.NO_ID:
                default:
                    Log.i("erro", "nada");
                    break;
            }
        }
    };

    private boolean handleSearch() {
        if ((editTextSearchGym.getText() == null) ||
                editTextSearchGym.getText().toString().equals("")) {
            new AlertDialog.Builder(this).setTitle(R.string.alert_label).
                    setMessage(R.string.location_not_supplied_message).
                    setPositiveButton("Continue",
                            new android.content.DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog, int arg1) {
                                    // Just close alert.
                                }
                            }).show();
            return false;
        }
        return true;
    }
}

Vamos agora adicionar um menu e quando clicar no item do menu abrir a tela ReviewList.

Declare essa variável: private static final int MENU_GET_REVIEWS = Menu.FIRST;

Adicione este código no MainActivity.java.

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        menu.add(0, this.MENU_GET_REVIEWS, 0, R.string.menu_get_reviews).setIcon(
                android.R.drawable.ic_menu_more);
        return true;
    }


    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case MENU_GET_REVIEWS:
                Intent intent = new Intent(this, ReviewList.class);
                startActivity(intent);
                return true;
        }
        return false;
    }

Agora quando você clicar no menu na opção Reviews, você irá para a tela do ReviewList.

Código do arquivo styles.xml.

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <style name="intro_blurb">
        <item name="android:textSize">22sp</item>
        <item name="android:textColor">#ee7620</item>
        <item name="android:textStyle">bold</item>
    </style>

    <style name="label">
        <item name="android:textSize">18sp</item>
        <item name="android:textColor">#ffffff</item>
    </style>

    <style name="edit_text">
        <item name="android:textSize">16sp</item>
        <item name="android:textColor">#000000</item>
    </style>

    <style name="view_text">
        <item name="android:textSize">16sp</item>
        <item name="android:textColor">#cccccc</item>
    </style>

    <style name="spinner_item">
        <item name="android:textSize">16sp</item>
        <item name="android:textColor">#000000</item>
    </style>

    <style name="spinner_item_dropdown">
        <item name="android:textSize">16sp</item>
        <item name="android:textColor">#000000</item>
    </style>

    <!--  this is the style for the container ListView, not the rows -->
    <!--  the rows are defined in code, see ReviewAdapter.ReviewListView -->
    <style name="review_list">
        <item name="android:background">#000000</item>
    </style>

</resources>

Código completo do MainActivity.java.

package br.com.micheladrianomedeiros.ondetreinar;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private Spinner spinnerTypesGym;
    private Button buttonSearchGym;
    private EditText editTextSearchGym;

    private static final int MENU_GET_REVIEWS = Menu.FIRST;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editTextSearchGym = findViewById(R.id.search_gym);
        spinnerTypesGym = findViewById(R.id.spinner_type_gym);
        buttonSearchGym = findViewById(R.id.button_search_gym);
        buttonSearchGym.setOnClickListener(buttonClickListener);
    }

    private View.OnClickListener buttonClickListener = new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            switch (v.getId()) {
                case R.id.button_search_gym:
                    boolean b = handleSearch();
                    if (b) {
                        Log.i("procurando", editTextSearchGym.getText().toString());
                        Log.i("tipo academia", spinnerTypesGym.getSelectedItem().toString());
                        Log.i("Buscar", "Vamos fazer a busca");
                    }
                    break;
                case View.NO_ID:
                default:
                    Log.i("erro", "nada");
                    break;
            }
        }
    };

    private boolean handleSearch() {
        if ((editTextSearchGym.getText() == null) ||
                editTextSearchGym.getText().toString().equals("")) {
            new AlertDialog.Builder(this).setTitle(R.string.alert_label).
                    setMessage(R.string.location_not_supplied_message).
                    setPositiveButton("Continue",
                            new android.content.DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog, int arg1) {
                                    // Just close alert.
                                }
                            }).show();
            return false;
        }
        return true;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        menu.add(0, this.MENU_GET_REVIEWS, 0, R.string.menu_get_reviews).setIcon(
                android.R.drawable.ic_menu_more);
        return true;
    }


    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case MENU_GET_REVIEWS:
                Intent intent = new Intent(this, ReviewList.class);
                startActivity(intent);
                return true;
        }
        return false;
    }
}