orcarmobile

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
	android:id="@+id/widget0"
	android:layout_width="fill_parent"
	android:layout_height="fill_parent"
	xmlns:android="http://schemas.android.com/apk/res/android">
<EditText
	android:id="@+id/v1"
	android:layout_width="105dp"
	android:layout_height="39dp"
	android:textSize="16sp"
	android:layout_x="95dp"
	android:layout_y="47dp" />
<EditText
	android:id="@+id/v2"
	android:layout_width="105dp"
	android:layout_height="39dp"
	android:textSize="16sp"
	android:layout_x="95dp"
	android:layout_y="86dp" />
<TextView
	android:id="@+id/widget37"
	android:layout_width="wrap_content"
	android:layout_height="20dp"
	android:text="valor1"
	android:layout_x="27dp"
	android:layout_y="56dp" />
<TextView
	android:id="@+id/widget37_copy"
	android:layout_width="wrap_content"
	android:layout_height="20dp"
	android:text="valor2"
	android:layout_x="27dp"
	android:layout_y="92dp" />
<Button
	android:id="@+id/soma"
	android:layout_width="60dp"
	android:layout_height="42dp"
	android:text="+"
	android:layout_x="31dp"
	android:layout_y="175dp"
        android:onClick="somar"/>
<Button
	android:id="@+id/subtrair"
	android:layout_width="58dp"
	android:layout_height="43dp"
	android:text="-"
	android:layout_x="97dp"
	android:layout_y="175dp"
        android:onClick="subtrair"/>
<Button
	android:id="@+id/div"
	android:layout_width="57dp"
	android:layout_height="42dp"
	android:text="/"
	android:layout_x="160dp"
	android:layout_y="175dp"
        android:onClick="divisao"/>
<Button
	android:id="@+id/vezes"
	android:layout_width="57dp"
	android:layout_height="42dp"
	android:text="*"
	android:layout_x="228dp"
	android:layout_y="175dp"
        android:onClick="vezes"/>
</AbsoluteLayout>


///////////

package android.app;

import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {

    private EditText edtValor1;
    private EditText edtValor2;

    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        edtValor1 = (EditText) findViewById(R.id.v1);
        edtValor2 = (EditText) findViewById(R.id.v2);

    }

    public void onClick(View v) {

    }

    public void subtrair(View v) {
        double valor1 = Double.parseDouble(edtValor1.getText().toString());

        double valor2 = Double.parseDouble(edtValor2.getText().toString());

        double result = valor1 - valor2;
        Toast.makeText(this, "O resultado e" + result, Toast.LENGTH_LONG).show();

    }

    public void somar(View v) {
        double valor1 = Double.parseDouble(edtValor1.getText().toString());

        double valor2 = Double.parseDouble(edtValor2.getText().toString());

        double result = valor1 + valor2;
        Toast.makeText(this, "O resultado e" + result, Toast.LENGTH_LONG).show();

    }

    public void divisao(View v) {
        double valor1 = Double.parseDouble(edtValor1.getText().toString());

        double valor2 = Double.parseDouble(edtValor2.getText().toString());

        double result = valor1 / valor2;
        Toast.makeText(this, "O resultado e" + result, Toast.LENGTH_LONG).show();

    }

    public void vezes(View v) {
        double valor1 = Double.parseDouble(edtValor1.getText().toString());

        double valor2 = Double.parseDouble(edtValor2.getText().toString());

        double result = valor1 * valor2;
        Toast.makeText(this, "O resultado e" + result, Toast.LENGTH_LONG).show();

    }
}
//////////////////////////////////////////////CALCULADORA
http://professoroscarjr.blogspot.com.br/p/tecmob.html


http://www.devmedia.com.br/projetando-e-criando-aplicativos-para-dispositivos-moveis/30671