CENTRO UNIVERSITÁRIO JORGE AMADO 1

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CENTRO UNIVERSITÁRIO JORGE AMADO - UNIJORGE
GESTÃO DA TECNOLOGIA DA INFORMAÇÃO
DAIANA SANTOS SANTANA
AVA 2: PROGRAMAÇÃO PARA DISPOSITIVOS MÓVEIS
DESENVOLVIMENTO DE UM APLICATIVO COM A PERSISTÊNCIA DE DADOS COM O USO DO SQLITE NO ANDROID
DOCENTE: CAMILLA LOBO PAULINO
SALVADOR
2022
Sumário
Desenvolvimento de um aplicativo com a persistência de dados com o uso do SQLite no Android .............................................................................................3 
Activity_item_form.xml ........................................................................................4	
Item.java .............................................................................................................7
item_form.java ....................................................................................................8
item_DAO.java ....................................................................................................9
itemsqlitehelper.java .........................................................................................11
MainActivity.Java ..............................................................................................11
Telas da Aplicação ............................................................................................13
Bibliografia ........................................................................................................14
Desenvolvimento de um aplicativo com a persistência de dados com o uso do SQLite no Android
A persistência é um recurso muito importante no desenvolvimento de aplicativos. Saber trabalhar com os diversos tipos de armazenamento permite que você desenvolva projetos mais robustos. O desenvolvimento de projetos com uso de banco de dados, seja local ou remoto, é um pré-requisito para o desenvolvimento de aplicativos modernos.
Para a concretização dos conhecimentos obtidos nesta unidade, você deve definir um objeto para a criação de sua classe e desenvolver um projeto com uso de persistência de dados com uso do SQLite no Android para realizar a manutenção dos diferentes registros de armazenamento, com a listagem, inclusão, alteração e exclusão desses registros.
Crie um aplicativo Android para trabalhar com uma base de dados com uma tabela para persistência de dados de um objeto escolhido por você.
O objeto deve ser definido por meio de uma classe própria, com:
· O mínimo de cinco atributos (com uso de três diferentes tipos de dados) mais o atributo id (long).
· Pelo menos um método construtor.
· Métodos de acesso (setters & getters) para todos os atributos.
· Outros métodos que sejam necessários.
A aplicação deverá tratar a inclusão, alteração e exclusão dos registros, além de tratar o acesso, abertura e fechamento do recurso do banco de dados do SQLite, com o uso da arquitetura em três camadas.
O aplicativo deverá apresentar os dados dos objetos armazenados por meio de uma lista (ListView) e apresentar as funcionalidades de inclusão, exclusão e alteração, que podem ser realizadas de acordo com a sua escolha.
Você pode montar as telas a seu critério, desde que atenda aos requisitos de listagem, inclusão, exclusão e alteração dos registros.
Activity_item_form.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
 tools:context="item_form">
 <Button
 android:id="@+id/btn_alterar"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_marginStart="44dp"
 android:layout_marginLeft="44dp"
 android:layout_marginTop="84dp"
 android:layout_marginBottom="16dp"
 android:onClick="alterarInserir"
 android:text="Alterar"
 app:backgroundTint="#4CAF50"
 app:layout_constraintBottom_toBottomOf="parent"
 app:layout_constraintStart_toStartOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/txt_title_person"
 app:layout_constraintVertical_bias="0.0" />
 <EditText
 android:id="@+id/input_task_user_email"
 android:layout_width="257dp"
 android:layout_height="42dp"
 android:layout_marginTop="16dp"
 android:layout_marginEnd="16dp"
 android:layout_marginRight="16dp"
 android:ems="10"
 android:inputType="text"
 app:layout_constraintEnd_toEndOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/txt_title_locate" />
 <EditText
 android:id="@+id/input_task_priority"
 android:layout_width="93dp"
 android:layout_height="42dp"
 android:layout_marginStart="16dp"
 android:layout_marginLeft="16dp"
 android:layout_marginTop="16dp"
 android:layout_marginEnd="16dp"
 android:layout_marginRight="16dp"
 android:ems="10"
 android:inputType="number" 
 app:layout_constraintEnd_toStartOf="@+id/input_task_user_email"
 app:layout_constraintHorizontal_bias="0.0"
 app:layout_constraintStart_toStartOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/txt_title_priority" />
 <TextView
 android:id="@+id/txt_title_locate"
 android:layout_width="63dp"
 android:layout_height="38dp"
 android:layout_marginTop="16dp"
 android:layout_marginEnd="208dp"
 android:layout_marginRight="208dp"
 android:text="Email"
 app:layout_constraintEnd_toEndOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/input_task_desription" />
 <TextView
 android:id="@+id/txt_title_priority"
 android:layout_width="84dp"
 android:layout_height="38dp"
 android:layout_marginStart="16dp"
 android:layout_marginLeft="16dp"
 android:layout_marginTop="16dp"
 android:text="Prioridade"
 app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/input_task_desription" />
 <TextView
 android:id="@+id/txt_title_task"
 android:layout_width="98dp"
 android:layout_height="27dp"
 android:text="Titulo"
 app:layout_constraintEnd_toEndOf="parent"
 app:layout_constraintHorizontal_bias="0.076"
 app:layout_constraintStart_toStartOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/txt_title_task"
 tools:ignore="NotSibling"
 tools:layout_editor_absoluteY="16dp" />
 <EditText
 android:id="@+id/input_task_title"
 android:layout_width="363dp"
 android:layout_height="48dp"
 android:layout_marginTop="22dp"
 android:ems="10"
 android:inputType="text"
 app:layout_constraintEnd_toEndOf="parent"
 app:layout_constraintStart_toStartOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/txt_title_task" />
 <TextView
 android:id="@+id/txt_title_description"
 android:layout_width="100dp"
 android:layout_height="30dp"
 android:layout_marginTop="16dp"
 android:text="Descrição"
 app:layout_constraintEnd_toEndOf="parent"
 app:layout_constraintHorizontal_bias="0.077"
 app:layout_constraintStart_toStartOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/input_task_title" />
 <EditText
 android:id="@+id/input_task_desription"
 android:layout_width="370dp"
 android:layout_height="74dp"
 android:layout_marginTop="16dp"
 android:ems="10"
 android:inputType="text"
 app:layout_constraintEnd_toEndOf="parent"
 app:layout_constraintStart_toStartOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/txt_title_description" />
 <Button
 android:id="@+id/btn_excluir"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_marginTop="84dp"android:layout_marginEnd="20dp"
 android:layout_marginRight="20dp"
 android:layout_marginBottom="16dp"
 android:onClick="excluir"
 android:text="Excluir"
 app:backgroundTint="#4CAF50"
 app:layout_constraintBottom_toBottomOf="parent"
 app:layout_constraintEnd_toEndOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/input_task_user"
 app:layout_constraintVertical_bias="0.0" />
 <Button
 android:id="@+id/btn_voltar"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_marginTop="16dp"
 android:layout_marginBottom="16dp"
 android:onClick="voltar"
 android:text="Voltar"
 app:backgroundTint="#4CAF50"
 app:layout_constraintBottom_toBottomOf="parent"
 app:layout_constraintEnd_toEndOf="parent"
 app:layout_constraintHorizontal_bias="0.537"
 app:layout_constraintStart_toStartOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/input_task_user"
 app:layout_constraintVertical_bias="1.0" />
 <TextView
 android:id="@+id/txt_title_person"
 android:layout_width="93dp"
 android:layout_height="44dp"
 android:layout_marginStart="16dp"
 android:layout_marginLeft="16dp"
 android:layout_marginTop="32dp"
 android:text="Usuario"
 app:layout_constraintStart_toStartOf="parent"
 app:layout_constraintTop_toBottomOf="@+id/input_task_priority" />
 <EditText
 android:id="@+id/input_task_user"
 android:layout_width="252dp"
 android:layout_height="48dp"
 android:layout_marginTop="28dp"
 android:ems="10"
 android:inputType="textPersonName"
 app:layout_constraintEnd_toEndOf="parent"
 app:layout_constraintHorizontal_bias="0.52"
 app:layout_constraintStart_toEndOf="@+id/txt_title_person"
 app:layout_constraintTop_toBottomOf="@+id/input_task_priority" />
</androidx.constraintlayout.widget.ConstraintLayout>
Item.java
package com.example.calcula_media; 
 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
 
package com.example.calcula_media; 
 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
 
package com.example.calcula_media; 
 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
 
package com.example.calcula_media; 
 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
 
package com.example.activity_main;
public class item {
 private long id;
 private String title;
 private String description;
 private int priority;
 private String userEmail;
 private String user;
 public item() {
 title ="Titulo do Item";
 description ="Finalizar AVA2";
 priority =1;
 userEmail ="daay72s@gmail.com";
 user ="Daiana";
 }
 public long getId() {return id;}
 public void setId(long id) {
 this.id = id;
 }
 public String getTitle() {
 return title;
 }
 public void setTitle(String title) {
 if (!title.isEmpty()) {
 this.title = title;
 }
 }
 public String getDescription(){
 return description;
 }
 public void setDescription(String description) {
 if (!description.isEmpty()){
 this.description = description;
 }
 }
 public int getPriority() {
 return priority;
 }
 public void setPriority(int priority) {
 if (priority >= 0) {
 this.priority = priority;
 }
 }
 public String getUserEmail() {
 return userEmail;
 }
 public void setUserEmail(String userEmail) {
 if (!userEmail.isEmpty()) {
 this.userEmail = userEmail;
 }
 }
 public String getUser() {
 return user;
 }
 public void setUser(String user) {
 if (!user.isEmpty()) {
 this.user = user;
 }
 }
 public String textoLista() {
 String item;
 item = getTitle();
 item += "\nDescrição: " + getDescription();
 item += "\nPrioridade: " + getPriority();
 item += "\nEmail: " + getUserEmail();
 item += "\nUsuario: " + getUser();
 return item;
 }
}
item_form.java
package com.example.activity_main;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import androidx.appcompat.app.AppCompatActivity;
public class item_form extends AppCompatActivity {
 EditText input_task_title, input_task_desription, input_task_priority,
 input_task_user_email, input_task_user;
 Button btn_alterar, btn_excluir;
 private int acao;
 private long id;
 @Overrideprotected
 void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_item_form);
 btn_alterar = (Button)
 findViewById(R.id.btn_alterar);
 btn_excluir = (Button)
 findViewById(R.id.btn_excluir);
 input_task_title = (EditText)
 findViewById(R.id.input_task_title);
 input_task_desription = (EditText)
 findViewById(R.id.input_task_desription);
 input_task_priority = (EditText)
 findViewById(R.id.input_task_priority);
 input_task_user_email = (EditText)
 findViewById(R.id.input_task_user_email);
 input_task_user = (EditText)
 findViewById(R.id.input_task_user);
 acao = getIntent().getExtras().getInt("acao");
 id = getIntent().getExtras().getLong("id");
 if (acao == -1) {
 setTitle("Incluir Item");
 }
 btn_alterar.setText("Incluir");
 btn_excluir.setEnabled(false);
 input_task_title.setText("Nome do Item");
 input_task_desription.setText("Descrição do Item");
 input_task_priority.setText("1");
 input_task_user_email.setText("Email do usuario");
 input_task_user.setText("Usuario");
 }else{
 setTitle("Alterar ou Excluir Item");
 item aux = new item();
 Item_DAO dao = new Item_DAO(this);
 dao.open();
 aux = dao.buscar(id);
 input_task_title.setText(aux.getTitle());
 input_task_desription.setText(aux.getDescription());
 }
}
 public void alterarInserir(View v) {
 int priority;
 String title,description,user_email,user;
 title = input_task_title.getText().toString();
 description = input_task_desription.getText().toString();
 user_email = input_task_user_email.getText().toString();
 user = input_task_user.getText().toString();
 priority =
 Integer.parseInt(input_task_priority.getText().toString());
 Item_DAO dao = new Item_DAO(this);dao.open();
 if (acao == -1) {
 dao.inserir(title,description ,priority,user_email,user);
 }else {
 dao.alterar( id ,title,description,priority,user_email,user);
 }
 dao.close();
 finish();
}
 public void excluir(View v) {
 if (acao == 0) {
 Item_DAO dao = new Item_DAO(this);
 dao.open();
 dao.apagar(id);
 dao.close();
 }
 finish();
}
 public void voltar(View v) {
 finish();
 }
}
item_DAO.java
package com.example.activity_main;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import java.util.ArrayList;import java.util.List;
public class Item_DAO {
 private SQLiteDatabase database;
 private String[] columns = {
 ItemSQLiteOpenHelper.COLUNA_ID,
 ItemSQLiteOpenHelper.COLUNA_TITLE,
 ItemSQLiteOpenHelper.COLUNA_DESCRIPTION,
 ItemSQLiteOpenHelper.COLUNA_PRIORITY,
 ItemSQLiteOpenHelper.COLUNA_LOCATE,
 ItemSQLiteOpenHelper.COLUNA_PERSON};
 private ItemSQLiteOpenHelper sqliteOpenHelper;public Item_DAO(Context context) {
 sqliteOpenHelper = new ItemSQLiteOpenHelper(context);
 }
 public void open() throws SQLException {
 database =sqliteOpenHelper.getWritableDatabase();
 }public void close() {sqliteOpenHelper.close();
 }
 public void inserir(String title,String description, int priority,String locate,String person) {
 ContentValues values = new ContentValues();
 values.put(ItemSQLiteOpenHelper.COLUNA_TITLE,title);
 values.put(ItemSQLiteOpenHelper.COLUNA_DESCRIPTION,description);
 values.put(ItemSQLiteOpenHelper.COLUNA_PRIORITY,
 String.valueOf(priority));
 values.put(ItemSQLiteOpenHelper.COLUNA_LOCATE,locate);
 values.put(ItemSQLiteOpenHelper.COLUNA_PERSON,person);
 database.insert(ItemSQLiteOpenHelper.TABELA, null, values);
 }
 public void alterar(long id,String title,String description, int priority,
 String locate,String person) {
 ContentValues values = new ContentValues();
 values.put(ItemSQLiteOpenHelper.COLUNA_TITLE,title);
 values.put(ItemSQLiteOpenHelper.COLUNA_DESCRIPTION,description);
 values.put(ItemSQLiteOpenHelper.COLUNA_PRIORITY,
 String.valueOf(priority));
 values.put(ItemSQLiteOpenHelper.COLUNA_LOCATE,locate);
 values.put(ItemSQLiteOpenHelper.COLUNA_PERSON,person);
 database.update(ItemSQLiteOpenHelper.TABELA,values,
 ItemSQLiteOpenHelper.COLUNA_ID +"=" + id, null);
 }
 public void apagar(long id) {
 database.delete(ItemSQLiteOpenHelper.TABELA,
 ItemSQLiteOpenHelper.COLUNA_ID+" = " + id, null);
 }
 public item buscar(long id) {
 Cursor cursor = database.query(ItemSQLiteOpenHelper.TABELA,
 columns,ItemSQLiteOpenHelper.COLUNA_ID +" = " +id, null,null, null
 ,null);
 cursor.moveToFirst();
 item item = new item();
 item.setId(cursor.getLong(0));
 item.setTitle(cursor.getString(1));
 item.setDescription(cursor.getString(2));
 item.setPriority(cursor.getInt(3));
 item.setUserEmail(cursor.getString(4));
 item.setUser(cursor.getString(5));
 cursor.close();
 return item;
 }
 public List<item> getAll() {
 List<item> items = new ArrayList<item>();
 Cursor cursor = database.query(ItemSQLiteOpenHelper.TABELA,
 columns, null, null, null,null, null);
 cursor.moveToFirst();while (!cursor.isAfterLast()) {
 item item = new item();item.setId(cursor.getLong(0));
 item.setTitle(cursor.getString(1));
 item.setDescription(cursor.getString(2));
 item.setPriority(cursor.getInt(3));
 item.setUserEmail(cursor.getString(4));
 item.setUser(cursor.getString(5));
 items.add(item);
 cursor.moveToNext();
 }
 cursor.close();
 return items;
 }
}
itemsqlitehelper.java
package com.example.activity_main;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class ItemSQLiteOpenHelper extends SQLiteOpenHelper {
 public static final String TABELA =" Item ";
 public static final String COLUNA_ID =" id ";
 public static final String COLUNA_TITLE =" title ";
 public static final String COLUNA_DESCRIPTION =" description ";
 public static final String COLUNA_PRIORITY =" priority ";
 public static final String COLUNA_LOCATE =" locate ";
 public static final String COLUNA_PERSON =" person ";
 private static final String DATABASE_NAME ="items.db";
 private static final int DATABASE_VERSION =1;
 private static final String CRIAR_BANCO =" create table "
 +TABELA +"("
 +COLUNA_ID +" integer primary key autoincrement , "
 +COLUNA_TITLE +" text not null , "
 +COLUNA_DESCRIPTION +" text not null, "
 +COLUNA_PRIORITY +" integer not null, "
 +COLUNA_LOCATE +" text not null, "
 +COLUNA_PERSON +" text not null);";
 public ItemSQLiteOpenHelper(Context context) {
 super(context,DATABASE_NAME, null, DATABASE_VERSION);
 }
 @Overridepublic
 void onCreate(SQLiteDatabase database) {
 database.execSQL (CRIAR_BANCO);
 }
 @Overridepublic
 void onUpgrade (SQLiteDatabase db, int oldVersion, int newVersion) {
 db. execSQL (" DROP TABLE IF EXISTS " +TABELA );
 onCreate (db);
 }
}
MainActivity.Java
package com.example.activity_main;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import java.util.Iterator;
import java.util.List;
public class MainActivity extends AppCompatActivity implements
 AdapterView.OnItemClickListener {
 ListView lista;Intent intent;private Item_DAO dao ;
 private String[] items;
 private long[] idItems;
 @Overrideprotected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 lista = (ListView) findViewById(R.id.lista);
 setTitle("Gerenciador de Items");
 dao =new Item_DAO(this);
 }
 dao.open();
 lista.setOnItemClickListener(this);
}
 @Override
 protected void onResume(){
 dao.open();super.onResume();
 List<item> listaItems = dao.getAll();
 items =new String[listaItems.size()];
 idItems =new long[listaItems.size()];
 int i =0;Iterator<item> iterator = listaItems.iterator();
 while (iterator.hasNext()) {
 item aux = new item();
 aux = (item) iterator.next();
 items[i] = aux.textoLista();
 idItems[i] = aux.getId();
 i++;
 }
 ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,items);
 lista.setAdapter(adapter);
}
@Override
protected void onPause(){
 dao.close();super.onPause();
}
public void onItemClick(AdapterView<?> parent,View view, int position, long ident){
 long id = idItems[position];
 intent =new Intent(getApplicationContext(),item_form.class);
 intent.putExtra("acao",0);
 intent.putExtra("id",id);
 startActivity(intent);
}
public void incluirItem(View v){
 intent =new Intent(getApplicationContext(),item_form.class);
 intent.putExtra("acao",-1);
 intent.putExtra("id",0L);
 startActivity(intent);}
public void sair(View v){
 finish();
}
}
Tela 1				Tela 2				Tela 3
Início				Inclusão do Item		Item inserido
Tela 4				Tela 5				Tela 6
Alteração do Item 		Inclusão de novo item	Itens salvos
 
Bibliografia
· SIMPLIFIED CODING. #5 Android SQLite Database Tutorial - SQLiteOpenHelper . Youtube, 21/10/20 17. Disponí vel em: < https://www.youtube.com/watch?v=YbOU_6d_zC8 >. 
Acesso em: 18/11/2022. 
· Salvando Dados com SQLite.
Disponível em: https://developer.android.com/training/data-storage/sqlite?hl=pt-br
Acesso em: 21/11/2022.
· 
package com.example.calcula_media; 
 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
 
import androidx.appcompat.app.AppCompatActivity; 
 
 
public class MainActivity extends AppCompatActivity { 
 EditText edta1; 
 EditText edta2; 
 EditText edta3; 
 EditText edt4; 
 EditText edt5; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.activity_main); 
 edta1 = (EditText) findViewById(R.id.edtA1); 
 edta2 = (EditText) findViewById(R.id.edtA2); 
 edta3 = (EditText) findViewById(R.id.edtA3); 
 edt4 = (EditText) findViewById(R.id.edtMedia); 
 edt5 = (EditText) findViewById(R.id.edtSituacao); 
 } 
 public void calcular (View v){ 
 
 String situacao; 
 int A1 = Integer.parseInt(edta1.getText().toString());int A2 = Integer.parseInt(edta2.getText().toString()); 
 int A3 = Integer.parseInt(edta3.getText().toString()); 
 int media = (A1+A2+A3) /3; 
 
 if (media>=6){ 
 situacao = "Aluno Aprovado"; 
 }else{ 
 situacao = "Aluno Reprovado"; 
 } 
 edt4.setText(media); 
 edt5.setText(situacao); 
 
 } 
}
package com.example.calcula_media; 
 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
 
import androidx.appcompat.app.AppCompatActivity; 
 
 
public class MainActivity extends AppCompatActivity { 
 EditText edta1; 
 EditText edta2; 
 EditText edta3; 
 EditText edt4; 
 EditText edt5; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.activity_main); 
 edta1 = (EditText) findViewById(R.id.edtA1); 
 edta2 = (EditText) findViewById(R.id.edtA2); 
 edta3 = (EditText) findViewById(R.id.edtA3); 
 edt4 = (EditText) findViewById(R.id.edtMedia); 
 edt5 = (EditText) findViewById(R.id.edtSituacao); 
 } 
 public void calcular (View v){ 
 
 String situacao; 
 int A1 = Integer.parseInt(edta1.getText().toString()); 
 int A2 = Integer.parseInt(edta2.getText().toString()); 
 int A3 = Integer.parseInt(edta3.getText().toString()); 
 int media = (A1+A2+A3) /3; 
 
 if (media>=6){ 
 situacao = "Aluno Aprovado"; 
 }else{ 
 situacao = "Aluno Reprovado"; 
 } 
 edt4.setText(media); 
 edt5.setText(situacao); 
 
 } 
}
package com.example.calcula_media; 
 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
 
import androidx.appcompat.app.AppCompatActivity; 
 
 
public class MainActivity extends AppCompatActivity { 
 EditText edta1; 
 EditText edta2; 
 EditText edta3; 
 EditText edt4; 
 EditText edt5; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.activity_main); 
 edta1 = (EditText) findViewById(R.id.edtA1); 
 edta2 = (EditText) findViewById(R.id.edtA2); 
 edta3 = (EditText) findViewById(R.id.edtA3); 
 edt4 = (EditText) findViewById(R.id.edtMedia); 
 edt5 = (EditText) findViewById(R.id.edtSituacao); 
 } 
 public void calcular (View v){ 
 
 String situacao; 
 int A1 = Integer.parseInt(edta1.getText().toString()); 
 int A2 = Integer.parseInt(edta2.getText().toString()); 
 int A3 = Integer.parseInt(edta3.getText().toString()); 
 int media = (A1+A2+A3) /3; 
 
 if (media>=6){ 
 situacao = "Aluno Aprovado"; 
 }else{ 
 situacao = "Aluno Reprovado"; 
 } 
 edt4.setText(media); 
 edt5.setText(situacao); 
 
 } 
}
package com.example.calcula_media; 
 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
 
import androidx.appcompat.app.AppCompatActivity; 
 
 
public class MainActivity extends AppCompatActivity { 
 EditText edta1; 
 EditText edta2; 
 EditText edta3; 
 EditText edt4; 
 EditText edt5; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.activity_main); 
 edta1 = (EditText) findViewById(R.id.edtA1); 
 edta2 = (EditText) findViewById(R.id.edtA2); 
 edta3 = (EditText) findViewById(R.id.edtA3); 
 edt4 = (EditText) findViewById(R.id.edtMedia); 
 edt5 = (EditText) findViewById(R.id.edtSituacao); 
 } 
 public void calcular (View v){ 
 
 String situacao; 
 int A1 = Integer.parseInt(edta1.getText().toString()); 
 int A2 = Integer.parseInt(edta2.getText().toString()); 
 int A3 = Integer.parseInt(edta3.getText().toString()); 
 int media = (A1+A2+A3) /3; 
 
 if (media>=6){ 
 situacao = "Aluno Aprovado"; 
 }else{ 
 situacao = "Aluno Reprovado"; 
 } 
 edt4.setText(media); 
 edt5.setText(situacao); 
 
 } 
package com.example.calcula_media; import android.os.Bundle; import android.view.View; import android.widget.EditText; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { EditText edta1; EditText edta2; EditText edta3; EditText edt4; EditText edt5; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); edta1 = (EditText) findViewById(R.id.edtA1); edta2 = (EditText) findViewById(R.id.edtA2); edta3 = (EditText) findViewById(R.id.edtA3); edt4 = (EditText) findViewById(R.id.edtMedia); edt5 = (EditText) findViewById(R.id.edtSituacao); } public void calcular (View v){ String situacao; int A1 = Integer.parseInt(edta1.getText().toString()); int A2 = Integer.parseInt(edta2.getText().toString()); int A3 = Integer.parseInt(edta3.getText().toString()); int media = (A1+A2+A3) /3; if (media>=6){ situacao = "Aluno Aprovado"; }else{ situacao = "Aluno Reprovado"; } edt4.setText(media); edt5.setText(situacao); } }
IR1
= 350.000,00 x 0,328= 114.800
3
4