EHXM

[도:트]'s Dev Log

안드로이드용 영어 어학기 Smart LC

스마트LC 소개 링크:
http://blog.ehxm.net/123

티스토어 링크:
http://bit.ly/awW3XW

[안드로이드 샘플코드] 미디어 스캐닝 Class

Posted by EHXM. Posted in " 안드로이드/Tech Note "2010/06/10 23:12

수동으로 미디어 스캔을 하는 클래스입니다. 강제 Media Scan Sample Source

import android.content.Context;
import android.media.MediaScannerConnection;
import android.net.Uri;

public class MediaScanner {

        private MediaScannerConnection mediaScanConn = null;

        private MusicSannerClient client = null;

        private String filePath = null;
        
        private String fileType = null;
        
        private String[] filePaths = null;
    /**
     *  Then call the MediaScanner  .scanFile("/sdcard/2.mp3");
     * */
        public MediaScanner(Context context) {
        // Create MusicSannerClient  
                if (client == null) {

                        client = new MusicSannerClient();
                }

                if (mediaScanConn == null) {

                        mediaScanConn = new MediaScannerConnection(context, client);
                }
        }

        class MusicSannerClient implements
                        MediaScannerConnection.MediaScannerConnectionClient {

                public void onMediaScannerConnected() {
                        
                        if(filePath != null){
                                
                                mediaScanConn.scanFile(filePath, fileType);
                        }
                        
                        if(filePaths != null){
                                
                                for(String file: filePaths){
                                        
                                        mediaScanConn.scanFile(file, fileType);
                                }
                        }
                        
                        filePath = null;
                        
                        fileType = null;
                        
                        filePaths = null;
                }

                public void onScanCompleted(String path, Uri uri) {
                        // TODO Auto-generated method stub
                        mediaScanConn.disconnect();
                }

        }
        
    /**
     *  Scan file label information  
     * @param filePath  File path eg  :/sdcard/MediaPlayer/dahai.mp3
     * @param fileType  File type eg  : audio/mp3  media/*  application/ogg
     * */
        public void scanFile(String filepath,String fileType) {

                this.filePath = filepath;
                
                this.fileType = fileType;
        // After the connection has been called the onMediaScannerConnected MusicSannerClient  () Method  
                mediaScanConn.connect();
        }
    /**
     * @param filePaths  File path  
     * @param fileType  File types  
     * */
        public void scanFile(String[] filePaths,String fileType){
                
                this.filePaths = filePaths;
                
                this.fileType = fileType;
                
                mediaScanConn.connect();
                
        }
        
        public String getFilePath() {

                return filePath;
        }

        public void setFilePath(String filePath) {

                this.filePath = filePath;
        }

        public String getFileType() {
                
                return fileType;
        }

        public void setFileType(String fileType) {
                
                this.fileType = fileType;
        }

        
}

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[안드로이드 샘플코드] ViewSwitcher

Posted by EHXM. Posted in " 안드로이드/Tech Note "2010/06/08 22:16

public class ViewSwitcherExample extends ListActivity
				 implements OnClickListener {
    
	//sample list items
	static final String[] ITEMS = new String[]
          { "List Item 1", "List Item 2", 
            "List Item 3", "List Item 4", 
            "List Item 5", "List Item 6", 
            "List Item 7", "List Item 8", 
            "List Item 9", "List Item 10" };
	
	//the ViewSwitcher
	private ViewSwitcher switcher;
	
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
	  super.onCreate(savedInstanceState);
	  
	  //no window title
	  requestWindowFeature(Window.FEATURE_NO_TITLE);
	  
	  //create the ViewSwitcher in the current context
	  switcher = new ViewSwitcher(this);
	  
	  //footer Button: see XML1
	  Button footer = (Button)View.inflate(this, R.layout.btn_loadmore, null);
	  
	  //progress View: see XML2
	  View progress = View.inflate(this, R.layout.loading_footer, null);
	  
	  //add the views (first added will show first)
	  switcher.addView(footer);
	  switcher.addView(progress);
	  
	  //add the ViewSwitcher to the footer
	  getListView().addFooterView(switcher);
	  
	  //add items to the ListView
	  setListAdapter(new ArrayAdapter(this,
	          android.R.layout.simple_list_item_1, ITEMS));
	}

	@Override /* Load More Button Was Clicked */
	public void onClick(View arg0) {
		//first view is showing, show the second progress view
		switcher.showNext();
		//and start background work
		new getMoreItems().execute();
	}
	
	/** Background Task To Get More Items**/
	private class getMoreItems extends AsyncTask {
		@Override
		protected Object doInBackground(Void… params) {
			//code to add more items
			//...
			try {
				Thread.sleep(3000); //only to demonstrate
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			return null;
		}

		@Override /* Background Task is Done */
		protected void onPostExecute(Object result) {
			//go back to the first view
			switcher.showPrevious();
                        //update the ListView
		}
	}
}

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[안드로이드 샘플코드] Database

Posted by EHXM. Posted in " 안드로이드/Tech Note "2010/06/08 19:29

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class DBAdapter 
{
    public static final String KEY_ROWID = "_id";
    public static final String KEY_ISBN = "isbn";
    public static final String KEY_TITLE = "title";
    public static final String KEY_PUBLISHER = "publisher";    
    private static final String TAG = "DBAdapter";
    
    private static final String DATABASE_NAME = "books";
    private static final String DATABASE_TABLE = "titles";
    private static final int DATABASE_VERSION = 1;

    private static final String DATABASE_CREATE =
        "create table titles (_id integer primary key autoincrement, "
        + "isbn text not null, title text not null, " 
        + "publisher text not null);";
        
    private final Context context; 
    
    private DatabaseHelper DBHelper;
    private SQLiteDatabase db;

    public DBAdapter(Context ctx) 
    {
        this.context = ctx;
        DBHelper = new DatabaseHelper(context);
    }
        
    private static class DatabaseHelper extends SQLiteOpenHelper 
    {
        DatabaseHelper(Context context) 
        {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
        }

        @Override
        public void onCreate(SQLiteDatabase db) 
        {
            db.execSQL(DATABASE_CREATE);
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, 
        int newVersion) 
        {
            Log.w(TAG, "Upgrading database from version " + oldVersion 
                    + " to "
                    + newVersion + ", which will destroy all old data");
            db.execSQL("DROP TABLE IF EXISTS titles");
            onCreate(db);
        }
    }    
    
    //---opens the database---
    public DBAdapter open() throws SQLException 
    {
        db = DBHelper.getWritableDatabase();
        return this;
    }

    //---closes the database---    
    public void close() 
    {
        DBHelper.close();
    }
    
    //---insert a title into the database---
    public long insertTitle(String isbn, String title, String publisher) 
    {
        ContentValues initialValues = new ContentValues();
        initialValues.put(KEY_ISBN, isbn);
        initialValues.put(KEY_TITLE, title);
        initialValues.put(KEY_PUBLISHER, publisher);
        return db.insert(DATABASE_TABLE, null, initialValues);
    }

    //---deletes a particular title---
    public boolean deleteTitle(long rowId) 
    {
        return db.delete(DATABASE_TABLE, KEY_ROWID + 
        		"=" + rowId, null) > 0;
    }

    //---retrieves all the titles---
    public Cursor getAllTitles() 
    {
        return db.query(DATABASE_TABLE, new String[] {
        		KEY_ROWID, 
        		KEY_ISBN,
        		KEY_TITLE,
                KEY_PUBLISHER}, 
                null, 
                null, 
                null, 
                null, 
                null);
    }

    //---retrieves a particular title---
    public Cursor getTitle(long rowId) throws SQLException 
    {
        Cursor mCursor =
                db.query(true, DATABASE_TABLE, new String[] {
                		KEY_ROWID,
                		KEY_ISBN, 
                		KEY_TITLE,
                		KEY_PUBLISHER
                		}, 
                		KEY_ROWID + "=" + rowId, 
                		null,
                		null, 
                		null, 
                		null, 
                		null);
        if (mCursor != null) {
            mCursor.moveToFirst();
        }
        return mCursor;
    }

    //---updates a title---
    public boolean updateTitle(long rowId, String isbn, 
    String title, String publisher) 
    {
        ContentValues args = new ContentValues();
        args.put(KEY_ISBN, isbn);
        args.put(KEY_TITLE, title);
        args.put(KEY_PUBLISHER, publisher);
        return db.update(DATABASE_TABLE, args, 
                         KEY_ROWID + "=" + rowId, null) > 0;
    }
}

출처: http://www.devx.com/wireless/Article/40842/1954

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[안드로이드] Live Wallpaper 샘플

Posted by EHXM. Posted in " 안드로이드/Tech Note "2010/02/09 13:46

Android SDK 2.1 에 Live Wallpaper 샘플이 포함되어 있네요.

아래와 같이 Android 2.1을 선택하고 Samples에서 CubeLiveWallpaper로 프로젝트를 만들어 보세요~

 

프로젝트를 AVD에서 실행시키고, 바탕화면을 계속 누르고 있으면 Live Wallpaper를 지정할 수 있습니다.

큐브가 배경에서 회전하고 있습니다.

아래는 CubeWallpaper의 뼈대입니다.
WallpaperService 상속받아서 클래스를 구현하고, 실제 동작내용을 내부에서 Engine을 상속받아서
해당 메소드를 구현해 주면 끝이군요.

public class CubeWallpaper1 extends WallpaperService {

    private final Handler mHandler = new Handler();

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }

    @Override
    public Engine onCreateEngine() {
        return new CubeEngine();
    }

    class CubeEngine extends Engine {


        private final Runnable mDrawCube = new Runnable() {
            public void run() {
            }
        };
        private boolean mVisible;

        CubeEngine() {

        }

        @Override
        public void onCreate(SurfaceHolder surfaceHolder) {
            super.onCreate(surfaceHolder);
        }

        @Override
        public void onDestroy() {
            super.onDestroy();
        }

        @Override
        public void onVisibilityChanged(boolean visible) {
        }

        @Override
        public void onSurfaceChanged(SurfaceHolder holder, int format,
                int width, int height) {
            super.onSurfaceChanged(holder, format, width, height);
        }

        @Override
        public void onSurfaceCreated(SurfaceHolder holder) {
            super.onSurfaceCreated(holder);
        }

        @Override
        public void onSurfaceDestroyed(SurfaceHolder holder) {
            super.onSurfaceDestroyed(holder);
        }

        @Override
        public void onOffsetsChanged(float xOffset, float yOffset,
                float xStep, float yStep, int xPixels, int yPixels) {
        }

        @Override
        public void onTouchEvent(MotionEvent event) {
        }


    }
}

onVisibilityChanged로 월페이퍼가 안보일때의 처리, onOffsetsChanged로 홈스크린에서 옆화면으로 이동했을때의 처리,
onTouchEvent로 터치이벤트를 처리해 주는 것 같습니다.

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