계산 example

예제 : Text  창에 입력한 값을 calc 버튼을 누를때 +10씩해서 text 창에 뿌려준다.

int -> string

String s = String.valueOf(i);

String s = Integer.toString(i);

string -> int

int i =  Integer.parseInt(str);

string compare

string a = “TEST”;

string b = “TEST”;

if(a.equals(b)) ;

if(a.equalsIgnoreCase(b));  « 소대문자 구별없이.

---

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

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

android:orientation=”vertical”

android:layout_width=”fill_parent”

android:layout_height=”fill_parent”>

<EditText

android:id=”@+id/EditText01”

android:layout_width=”fill_parent”

android:layout_height=”wrap_content”/>

<Button

android:id=”@+id/Button01”

android:layout_width=”fill_parent”

android:layout_height=”wrap_content”

android:text=”calc”/>

</LinearLayout>

---

package com.sulac.CalcTest;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

public class CalcTest extends Activity {

EditText edit;

Button btn;

/-* Called when the activity is first created. *-

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

edit = (EditText)findViewById(R.id.EditText01);

btn = (Button)findViewById(R.id.Button01);

btn.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {

String str = edit.getText().toString();

int i = Integer.parseInt(str);

i = i + 10;

str = Integer.toString(i);

edit.setText(str);

}

});

}

}