Menghitung Luas Permukaan balok berbasis android dengan menggunakan eclipse
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
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=".Luas_Balok" >
<TextView
android:id="@+id/txtPanjang"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/txtPanjang" />
<EditText
android:id="@+id/edtPanjang"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="numberDecimal" >
<requestFocus />
</EditText>
<TextView
android:id="@+id/txtLebar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/txtLebar" />
<EditText
android:id="@+id/edtLebar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="numberDecimal" />
<TextView
android:id="@+id/txtTinggi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/txtTinggi" />
<EditText
android:id="@+id/edtTinggi"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="numberDecimal" />
<Button
android:id="@+id/btnHitung"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/txtHitung" />
<TextView
android:id="@+id/txtLuas"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/txtLuas"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
package com.uts.luaspermukaanbalok;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Luas_Balok extends Activity {
@Override
protected void
onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_luas__balok);
final EditText
edtPanjang =(EditText) findViewById(R.id.edtPanjang);
final
EditText edtLebar = (EditText) findViewById(R.id.edtLebar);
final
EditText edtTinggi = (EditText) findViewById(R.id.edtTinggi);
final
Button btnHitung = (Button) findViewById(R.id.btnHitung);
final
TextView txtLuas = (TextView) findViewById(R.id.txtLuas);
btnHitung.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
int valPanjang=
Integer.parseInt(edtPanjang.getText().toString());
int valLebar=
Integer.parseInt(edtLebar.getText().toString());
int
valTinggi= Integer.parseInt(edtTinggi.getText().toString());
int
luas=2*((valPanjang*valLebar)+(valLebar*valTinggi)+(valPanjang*valTinggi));
txtLuas.setText("Luas : "+luas);
}
});
}
@Override
public boolean
onCreateOptionsMenu(Menu menu) {
// Inflate the
menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.luas__balok, menu);
return true;
}
}
