[Android/예제] Hello World

간단한 설명
어디서나 볼 수 있는 Hello World.

안드로이드 어플리케이션은 다음과 같은 덩어리로 이루어진다.

1. 진짜 소스 ( 개발자가 직접 작성해야 하는것 )
2. 레이아웃 관련 XML
3. 각종 리소스 ( 이미지, 각종 단어들... )
4. 어플리케이션 관련 설정

이중에서 2,3,4는 이클립스 플러그인에서 쉽게 작성할 수 있도록 도와 준다.

자세한것들은 다음에 다루도록 하자.


소스코드
src/com.ggaman.android.sample.Test.java

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1. package com.ggaman.android.sample;  
2.   
3. import android.app.Activity;  
4. import android.os.Bundle;  
5.   
6. public class Test extends Activity {  
7.     /** Called when the activity is first created. */  
8.     @Override  
9.     public void onCreate(Bundle savedInstanceState) {  
10.         super.onCreate(savedInstanceState);  
11.         setContentView(R.layout.main);  
12.     }  
13. }  

package com.ggaman.android.sample; import android.app.Activity; import android.os.Bundle; public class Test extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } }

src/com.ggaman.andorid.sample.R.java

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1. /* AUTO-GENERATED FILE.  DO NOT MODIFY. 
2.  * 
3.  * This class was automatically generated by the 
4.  * aapt tool from the resource data it found.  It 
5.  * should not be modified by hand. 
6.  */  
7.   
8. package com.ggaman.android.sample;  
9.   
10. public final class R {  
11.     public static final class attr {  
12.     }  
13.     public static final class drawable {  
14.         public static final int icon=0x7f020000;  
15.     }  
16.     public static final class layout {  
17.         public static final int main=0x7f030000;  
18.     }  
19.     public static final class string {  
20.         public static final int app_name=0x7f040001;  
21.         public static final int hello=0x7f040000;  
22.     }  
23. }  

/* AUTO-GENERATED FILE. DO NOT MODIFY. * * This class was automatically generated by the * aapt tool from the resource data it found. It * should not be modified by hand. */ package com.ggaman.android.sample; public final class R { public static final class attr { } public static final class drawable { public static final int icon=0x7f020000; } public static final class layout { public static final int main=0x7f030000; } public static final class string { public static final int app_name=0x7f040001; public static final int hello=0x7f040000; } }

res/layout/main.xml

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
3.     android:orientation="vertical"  
4.     android:layout_width="fill_parent"  
5.     android:layout_height="fill_parent"  
6.     >  
7. <TextView    
8.     android:layout_width="fill_parent"   
9.     android:layout_height="wrap_content"   
10.     android:text="@string/hello"  
11.     />  
12. </LinearLayout>  

<?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" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> </LinearLayout>

res/values/strings.xml

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <resources>  
3.     <string name="hello">Hello World, Test</string>  
4.     <string name="app_name">AppName</string>  
5. </resources>  

<?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">Hello World, Test</string> <string name="app_name">AppName</string> </resources>

res/drawable/icon.png

AndroidManifest.xml

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"  
3.       package="com.ggaman.android.sample"  
4.       android:versionCode="1"  
5.       android:versionName="1.0.0">  
6.     <application android:icon="@drawable/icon" android:label="@string/app_name">  
7.         <activity android:name=".Test"  
8.                   android:label="@string/app_name">  
9.             <intent-filter>  
10.                 <action android:name="android.intent.action.MAIN" />  
11.                 <category android:name="android.intent.category.LAUNCHER" />  
12.             </intent-filter>  
13.         </activity>  
14.     </application>  
15. </manifest>   

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.ggaman.android.sample" android:versionCode="1" android:versionName="1.0.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".Test" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>