PRÁTICA 7 – EDITTEXT

Objetivo:

Utilizar editText para entrar com texto e formatar

Introdução

editText -> Entrada de texto do usuário na tela.

Tarefa:

Criar tipos aplicações de textView e buttons:

Programa 1 – Design padrão com um textView e um editView:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <TextView
        android:id="@+id/texto"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerInParent="false"
        android:text="Dados"
        android:layout_marginTop="14dp"
        android:textAppearance="?android:attr/textAppearanceLarge"
        />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/angulo"
        android:layout_below="@+id/texto"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:numeric="signed|decimal" />

    <TextView
        android:id="@+id/saida"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="false"
        android:text="saida"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_centerHorizontal="true"
        android:layout_below="@+id/angulo" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Calcula"
        android:id="@+id/calcula"
        android:layout_below="@+id/saida"
        android:layout_centerHorizontal="true" />

</RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<TextView

android:id="@+id/texto"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerHorizontal="true"

android:layout_centerInParent="false"

android:text="Dados"

android:layout_marginTop="14dp"

android:textAppearance="?android:attr/textAppearanceLarge"

<EditText

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:id="@+id/angulo"

android:layout_below="@+id/texto"

android:layout_alignParentRight="true"

android:layout_alignParentEnd="true"

android:layout_alignParentLeft="true"

android:layout_alignParentStart="true"

android:numeric="signed|decimal" />

<TextView

android:id="@+id/saida"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="false"

android:text="saida"

android:textAppearance="?android:attr/textAppearanceLarge"

android:layout_centerHorizontal="true"

android:layout_below="@+id/angulo" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Calcula"

android:id="@+id/calcula"

android:layout_below="@+id/saida"

android:layout_centerHorizontal="true" />

</RelativeLayout>

Programa 1 – Calculadora de cossenos:

package nome do seu pacote! // Esta linha deve ser mantida com o nome do pacote!

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final TextView saida =(TextView)findViewById(R.id.saida);
        final EditText angulo =  (EditText) findViewById(R.id.angulo);
        final Button calcula =  (Button) findViewById(R.id.calcula);

        calcula.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double cos = Math.cos(Double.valueOf(angulo.getText().toString()));
                saida.setText("COS = "+String.valueOf(cos));
            }
        });
    }
}

package nome do seu pacote! // Esta linha deve ser mantida com o nome do pacote!

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

final TextView saida =(TextView)findViewById(R.id.saida);

final EditText angulo = (EditText) findViewById(R.id.angulo);

final Button calcula = (Button) findViewById(R.id.calcula);

calcula.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

double cos = Math.cos(Double.valueOf(angulo.getText().toString()));

saida.setText("COS = "+String.valueOf(cos));

}

});

}

Programa 2 – Linear Vertical LayOut com dois editTexts:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="empty.ammsoft.empty.MainActivity"
    android:id="@+id/layout"
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Triângulo de Pitágoras"
        android:id="@+id/textView4"
        android:layout_gravity="center_horizontal" />

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentBottom="true">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="a"
            android:id="@+id/textView" />

        <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/a"
            android:layout_weight="1"
            android:inputType="number|numberSigned" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="b"
            android:id="@+id/textView3" />

        <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/b"
            android:layout_weight="1"
            android:inputType="number|numberSigned" />

    </LinearLayout>

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="C="
            android:id="@+id/x1"
            android:layout_weight="1" />

    </LinearLayout>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context="empty.ammsoft.empty.MainActivity"

android:id="@+id/layout"

android:orientation="vertical">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textAppearance="?android:attr/textAppearanceLarge"

android:text="Triângulo de Pitágoras"

android:id="@+id/textView4"

android:layout_gravity="center_horizontal" />

<LinearLayout

android:orientation="horizontal"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentTop="true"

android:layout_alignParentLeft="true"

android:layout_alignParentStart="true"

android:layout_alignParentBottom="true">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textAppearance="?android:attr/textAppearanceMedium"

android:text="a"

android:id="@+id/textView" />

<EditText

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:id="@+id/a"

android:layout_weight="1"

android:inputType="number|numberSigned" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textAppearance="?android:attr/textAppearanceMedium"

android:text="b"

android:id="@+id/textView3" />

<EditText

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:id="@+id/b"

android:layout_weight="1"

android:inputType="number|numberSigned" />

</LinearLayout>

<LinearLayout

android:orientation="horizontal"

android:layout_width="match_parent"

android:layout_height="wrap_content">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textAppearance="?android:attr/textAppearanceLarge"

android:text="C="

android:id="@+id/x1"

android:layout_weight="1" />

</LinearLayout>

Programa 2 – OnFocusChangeListener:

package nome do seu pacote! // Esta linha deve ser mantida com o nome do pacote!

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    public void calcula() {
        final EditText a_edit =  (EditText) findViewById(R.id.a);
        final EditText b_edit =  (EditText) findViewById(R.id.b);
        final TextView c_text =  (TextView) findViewById(R.id.c);

        double a = Double.valueOf(a_edit.getText().toString());
        double b = Double.valueOf(b_edit.getText().toString());
        double c = Math.sqrt(a*a + b*b);

        c_text.setText(String.format("%.2f", c));
    }

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

        final EditText a_edit =  (EditText) findViewById(R.id.a);
        final EditText b_edit =  (EditText) findViewById(R.id.b);


        a_edit.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                calcula();
            }
        });

        b_edit.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                calcula();
            }
        });
    }
}

package nome do seu pacote! // Esta linha deve ser mantida com o nome do pacote!

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

public void calcula() {

final EditText a_edit = (EditText) findViewById(R.id.a);

final EditText b_edit = (EditText) findViewById(R.id.b);

final TextView c_text = (TextView) findViewById(R.id.c);

double a = Double.valueOf(a_edit.getText().toString());

double b = Double.valueOf(b_edit.getText().toString());

double c = Math.sqrt(a*a + b*b);

c_text.setText(String.format("%.2f", c));

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

final EditText a_edit = (EditText) findViewById(R.id.a);

final EditText b_edit = (EditText) findViewById(R.id.b);

a_edit.setOnFocusChangeListener(new View.OnFocusChangeListener() {

@Override

public void onFocusChange(View v, boolean hasFocus) {

calcula();

}

});

b_edit.setOnFocusChangeListener(new View.OnFocusChangeListener() {

@Override

public void onFocusChange(View v, boolean hasFocus) {

calcula();

}

});

}

Desafio: Implemente a mesma ideia para calcular o valor corrigido por juros compostos mensais depois de n meses:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="empty.ammsoft.empty.MainActivity"
    android:id="@+id/layout"
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Juros Compostos"
        android:id="@+id/textView4"
        android:layout_gravity="center_horizontal" />

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentBottom="true">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Inicial (R$)"
            android:id="@+id/textView"
            android:layout_weight="1" />

        <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/valorInicial"
            android:layout_weight="1"
            android:inputType="number|numberSigned"
            android:text="1000"
            android:numeric="integer" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Juros (aa %)"
            android:id="@+id/textView2"
            android:layout_weight="1" />

        <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/juros"
            android:layout_weight="1"
            android:inputType="number|numberSigned"
            android:text="8"
            android:numeric="integer" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Meses"
            android:id="@+id/textView3"
            android:layout_weight="1" />

        <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/meses"
            android:layout_weight="1"
            android:inputType="number|numberSigned"
            android:text="48"
            android:numeric="integer" />

    </LinearLayout>

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="Final"
            android:id="@+id/valorFinal"
            android:layout_weight="1" />

    </LinearLayout>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context="empty.ammsoft.empty.MainActivity"

android:id="@+id/layout"

android:orientation="vertical">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textAppearance="?android:attr/textAppearanceLarge"

android:text="Juros Compostos"

android:id="@+id/textView4"

android:layout_gravity="center_horizontal" />

<LinearLayout

android:orientation="horizontal"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentTop="true"

android:layout_alignParentLeft="true"

android:layout_alignParentStart="true"

android:layout_alignParentBottom="true">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Inicial (R$)"

android:id="@+id/textView"

android:layout_weight="1" />

<EditText

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:id="@+id/valorInicial"

android:layout_weight="1"

android:inputType="number|numberSigned"

android:text="1000"

android:numeric="integer" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Juros (aa %)"

android:id="@+id/textView2"

android:layout_weight="1" />

<EditText

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:id="@+id/juros"

android:layout_weight="1"

android:inputType="number|numberSigned"

android:text="8"

android:numeric="integer" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Meses"

android:id="@+id/textView3"

android:layout_weight="1" />

<EditText

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:id="@+id/meses"

android:layout_weight="1"

android:inputType="number|numberSigned"

android:text="48"

android:numeric="integer" />

</LinearLayout>

<LinearLayout

android:orientation="horizontal"

android:layout_width="match_parent"

android:layout_height="wrap_content">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textAppearance="?android:attr/textAppearanceLarge"

android:text="Final"

android:id="@+id/valorFinal"

android:layout_weight="1" />

</LinearLayout>

package nome do seu pacote! // Esta linha deve ser mantida com o nome do pacote!

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    EditText valorInicial;
    EditText juros;
    EditText meses;
    TextView valorFinal;

    public void calculaJuros() {
        double valorInicialNum = Double.valueOf(valorInicial.getText().toString());
        double jurosNumAA = Double.valueOf(juros.getText().toString());
        double mesesNum = Double.valueOf(meses.getText().toString());

        double jurosNumAM = Math.pow(1+jurosNumAA/100d,1d/12d);

        double valorFinalNum = valorInicialNum*Math.pow(jurosNumAM,mesesNum);

        valorFinal.setText("Valor final = R$"+String.format("%.2f", valorFinalNum));
    }

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

        valorInicial =  (EditText) findViewById(R.id.valorInicial);
        juros =  (EditText) findViewById(R.id.juros);
        meses =  (EditText) findViewById(R.id.meses);
        valorFinal = (TextView) findViewById(R.id.valorFinal);


        valorInicial.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                calculaJuros();
            }
        });

        juros.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                calculaJuros();
            }
        });

        meses.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                calculaJuros();
            }
        });
    }
}

package nome do seu pacote! // Esta linha deve ser mantida com o nome do pacote!

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

EditText valorInicial;

EditText juros;

EditText meses;

TextView valorFinal;

public void calculaJuros() {

double valorInicialNum = Double.valueOf(valorInicial.getText().toString());

double jurosNumAA = Double.valueOf(juros.getText().toString());

double mesesNum = Double.valueOf(meses.getText().toString());

double jurosNumAM = Math.pow(1+jurosNumAA/100d,1d/12d);

double valorFinalNum = valorInicialNum*Math.pow(jurosNumAM,mesesNum);

valorFinal.setText("Valor final = R$"+String.format("%.2f", valorFinalNum));

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

valorInicial = (EditText) findViewById(R.id.valorInicial);

juros = (EditText) findViewById(R.id.juros);

meses = (EditText) findViewById(R.id.meses);

valorFinal = (TextView) findViewById(R.id.valorFinal);

valorInicial.setOnFocusChangeListener(new View.OnFocusChangeListener() {

@Override

public void onFocusChange(View v, boolean hasFocus) {

calculaJuros();

}

});

juros.setOnFocusChangeListener(new View.OnFocusChangeListener() {

@Override

public void onFocusChange(View v, boolean hasFocus) {

calculaJuros();

}

});

meses.setOnFocusChangeListener(new View.OnFocusChangeListener() {

@Override

public void onFocusChange(View v, boolean hasFocus) {

calculaJuros();

}

});

}