안드로이드
[안드로이드 강좌 예제 따라하기 4] 계산기만들기 - 틀만들기(1/2)
App.SHIN
2014. 11. 4. 00:57
오늘은 계산기를 만들어보겠습니다.
이전에 배운내용 처럼
LinearLayout android:orientation="vertical" 옵션과 android:layout_weight 옵션을 사용 하여 화면을 굿헝합니다.
android_weight 는 비율로 생각하시면 됩니다.
4:1:1:1
<LinearLayout 세로 >
<LinearLayout 가로 > 가로 가로 가로 ... <LinearLayout >
<LinearLayout 가로 > 가로 가로 가로 ... <LinearLayout >
<LinearLayout 가로 > 가로 가로 가로 ... <LinearLayout >
...
</LinearLayout >
이런식으로 구성합니다.
res/layout/activity_calculator.xml
<!--?xml version="1.0" encoding="utf-8"?-->
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical">
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="3">
<TextView
android:id="@+id/text_result"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="right"
android:textSize="30dip" >
</TextView>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_weight="1">
<Button
android:id="@+id/button_back"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="←"
android:layout_weight="1"/>
<Button
android:id="@+id/button_clear"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="C"
android:layout_weight="1"/>
<Button
android:id="@+id/button_equal"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="="
android:layout_weight="1"/>
<Button
android:id="@+id/button_plus"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="+"
android:layout_weight="1"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_weight="1">
<Button
android:id="@+id/button_7"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="7"
android:layout_weight="1" />
<Button
android:id="@+id/button_8"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="8"
android:layout_weight="1"/>
<Button
android:id="@+id/button_9"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="9"
android:layout_weight="1" />
<Button
android:id="@+id/button_minus"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="-"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_weight="1">
<Button
android:id="@+id/button_4"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="4"
android:layout_weight="1" />
<Button
android:id="@+id/button_5"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="5"
android:layout_weight="1"/>
<Button
android:id="@+id/button_6"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="6"
android:layout_weight="1" />
<Button
android:id="@+id/button_multi"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="*"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_weight="1">
<Button
android:id="@+id/button_1"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="1"
android:layout_weight="1"/>
<Button
android:id="@+id/button_2"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="2"
android:layout_weight="1"/>
<Button
android:id="@+id/button_3"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="3"
android:layout_weight="1"/>
<Button
android:id="@+id/button_devide"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="/"
android:layout_weight="1"/>
</LinearLayout>
</LinearLayout>Layout_weight 를 사용할때 android:layout_height="wrap_content"를 사용해주세요
결과
public class CalculatorActivity extends Activity implements OnClickListener {
private Button b1;
private Button b2;
private Button b3;
private Button b4;
private Button b5;
private Button b6;
private Button b7;
private Button b8;
private Button b9;
private Button b_claer;
private Button b_back;
private Button b_devide;
private Button b_plus;
private Button b_minus;
private Button b_multi;
private Button b_equal;
private TextView result;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_calculator );
b1 = (Button) findViewById( R.id.button_1 );
b1.setOnClickListener(this);
b2 = (Button) findViewById( R.id.button_2 );
b2.setOnClickListener(this);
b3 = (Button) findViewById( R.id.button_3 );
b3.setOnClickListener(this);
b4 = (Button) findViewById( R.id.button_4 );
b4.setOnClickListener(this);
b5 = (Button) findViewById( R.id.button_5 );
b5.setOnClickListener(this);
b6 = (Button) findViewById( R.id.button_6 );
b6.setOnClickListener(this);
b7 = (Button) findViewById( R.id.button_7 );
b7.setOnClickListener(this);
b8 = (Button) findViewById( R.id.button_8 );
b8.setOnClickListener(this);
b9 = (Button) findViewById( R.id.button_9 );
b9.setOnClickListener(this);
b_claer = (Button) findViewById( R.id.button_clear );
b_claer.setOnClickListener(this);
b_back = (Button) findViewById( R.id.button_back );
b_back.setOnClickListener(this);
b_devide = (Button) findViewById( R.id.button_devide );
b_devide.setOnClickListener(this);
b_plus = (Button) findViewById( R.id.button_plus );
b_plus.setOnClickListener(this);
b_minus = (Button) findViewById( R.id.button_minus );
b_minus.setOnClickListener(this);
b_multi = (Button) findViewById( R.id.button_multi );
b_multi.setOnClickListener(this);
b_equal = (Button) findViewById( R.id.button_equal );
b_equal.setOnClickListener(this);
result = (TextView) findViewById( R.id.text_result );
}
@Override
public void onClick(View v) {
if( v.equals( b1 )){
if( result.getText().length() == 1 && "0".equals(result.getText())){
result.setText("1");
}else {
result.setText( result.getText()+"1");
}
}else if( v.equals( b2 )){
if( result.getText().length() == 1 && "0".equals(result.getText())){
result.setText("2");
}else {
result.setText( result.getText()+"2");
}
}else if( v.equals( b3 )){
if( result.getText().length() == 1 && "0".equals(result.getText())){
result.setText("3");
}else {
result.setText( result.getText()+"3");
}
}else if( v.equals( b4 )){
if( result.getText().length() == 1 && "0".equals(result.getText())){
result.setText("4");
}else {
result.setText( result.getText()+"4");
}
}else if( v.equals( b5 )){
if( result.getText().length() == 1 && "0".equals(result.getText())){
result.setText("5");
}else {
result.setText( result.getText()+"5");
}
}else if( v.equals( b6 )){
if( result.getText().length() == 1 && "0".equals(result.getText())){
result.setText("6");
}else {
result.setText( result.getText()+"6");
}
}else if( v.equals( b7 )){
if( result.getText().length() == 1 && "0".equals(result.getText())){
result.setText("7");
}else {
result.setText( result.getText()+"7");
}
}else if( v.equals( b8 )){
if( result.getText().length() == 1 && "0".equals(result.getText())){
result.setText("8");
}else {
result.setText( result.getText()+"8");
}
}else if( v.equals( b9 )){
if( result.getText().length() == 1 && "0".equals(result.getText())){
result.setText("9");
}else {
result.setText( result.getText()+"9");
}
}else if( v.equals( b_claer )){
result.setText( "0");
}else if( v.equals( b_back )){
if( result.getText().length() != 0 ) {
result.setText( result.getText().subSequence( 0 , result.getText().length()-1));
}
}else if( v.equals( b_devide )){
result.setText( result.getText()+"/");
}else if( v.equals( b_plus )){
result.setText( result.getText()+"+");
}else if( v.equals( b_minus )){
result.setText( result.getText()+"-");
}else if( v.equals( b_multi )){
result.setText( result.getText()+"X");
}else if( v.equals( b_equal )){
result.setText( calc() );
}
}
private String calc() {
// 다음시간에 계속
return "계산";
}
}
ShinExample_04.zip계산부분은 수정을 좀 해야하네요