안드로이드 프로그래밍 008

android

안드로이드 프로그래밍 008 - Notepadv3_2

우혁이 아빠 2010. 4. 15. 12:00

이제 소스를 분석해 봅니다.
1. Notepadv3.java

package com.android.demo.notepad3;

import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.AdapterView.AdapterContextMenuInfo;

public class Notepadv3 extends ListActivity {
    private static final int ACTIVITY_CREATE=0;
    private static final int ACTIVITY_EDIT=1;
    
    private static final int INSERT_ID = Menu.FIRST;
    private static final int DELETE_ID = Menu.FIRST + 1;

private NotesDbAdapter mDbHelper;
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.notes_list);
        mDbHelper = new NotesDbAdapter(this);
        mDbHelper.open();
        fillData();
        			// 모든 데이터를 가져와 ListView 넣고
        registerForContextMenu(getListView());
        			// 길게 누르는 이벤트를 위한 메소드인거 같죠?
    }
    
    private void fillData() {
    	Cursor notesCursor = mDbHelper.fetchAllNotes();
        // Get all of the rows from the database and create the item list
        startManagingCursor(notesCursor);
        
        // Create an array to specify the fields we want to display in the list (only TITLE)
        String[] from = new String[]{NotesDbAdapter.KEY_TITLE};
        
        // and an array of the fields we want to bind those fields to (in this case just text1)
        int[] to = new int[]{R.id.text1};
        
        // Now create a simple cursor adapter and set it to display
        SimpleCursorAdapter notes = 
        	    new SimpleCursorAdapter(this, R.layout.notes_row, notesCursor, from, to);
        setListAdapter(notes);
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        menu.add(0, INSERT_ID, 0, R.string.menu_insert);
        return true;
    }

@Override
    public boolean onMenuItemSelected(int featureId, MenuItem item) {
        switch(item.getItemId()) {
        case INSERT_ID:
            createNote();
            return true;
        }
       
        return super.onMenuItemSelected(featureId, item);
    }
	
    @Override
	public void onCreateContextMenu(ContextMenu menu, View v,
			ContextMenuInfo menuInfo) {
		super.onCreateContextMenu(menu, v, menuInfo);
        menu.add(0, DELETE_ID, 0, R.string.menu_delete);
	}

@Override
	public boolean onContextItemSelected(MenuItem item) {
		switch(item.getItemId()) {
    	case DELETE_ID:
    		AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
	        mDbHelper.deleteNote(info.id);
	        fillData();
	        return true;
		}
		return super.onContextItemSelected(item);
	}
	
    private void createNote() {
        Intent i = new Intent(this, NoteEdit.class);
        startActivityForResult(i, ACTIVITY_CREATE);
    }
    
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
    				// ListView에 있는 item들에게 기능부여를 하고
        super.onListItemClick(l, v, position, id);
        Intent i = new Intent(this, NoteEdit.class);
        i.putExtra(NotesDbAdapter.KEY_ROWID, id);
        startActivityForResult(i, ACTIVITY_EDIT);
    }

@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		fillData();
					// 결과값을 받아서 디비에 넣는 코드는 사라졌습니다.
	}
}

2. NoteEdit.java

package com.android.demo.notepad3;

import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class NoteEdit extends Activity {

private EditText mTitleText;
    private EditText mBodyText;
    private Long mRowId;
    
    private NotesDbAdapter mDbHelper;

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

mDbHelper = new NotesDbAdapter(this);
        mDbHelper.open();
        
        setContentView(R.layout.note_edit);
       
        mTitleText = (EditText) findViewById(R.id.title);
        mBodyText = (EditText) findViewById(R.id.body);
      
        Button confirmButton = (Button) findViewById(R.id.confirm);
       
        mRowId = savedInstanceState != null ? 
        		savedInstanceState.getLong(NotesDbAdapter.KEY_ROWID) : null;
        
        if (mRowId == null) {
			Bundle extras = getIntent().getExtras();
			mRowId = extras != null ? 
					extras.getLong(NotesDbAdapter.KEY_ROWID) : null;
		}
          
        populateFields();
        
        confirmButton.setOnClickListener(new View.OnClickListener() {

public void onClick(View view) {
                setResult(RESULT_OK);
                finish();
            }
          
        });
    }
	
	private void populateFields() {
		if (mRowId != null) {
			Cursor note = mDbHelper.fetchNote(mRowId);
			startManagingCursor(note);
			mTitleText.setText(note.getString(
					note.getColumnIndexOrThrow(NotesDbAdapter.KEY_TITLE)));
			mBodyText.setText(note.getString(
					note.getColumnIndexOrThrow(NotesDbAdapter.KEY_BODY)));
		}
	}

@Override
	protected void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		outState.putLong(NotesDbAdapter.KEY_ROWID, mRowId);
	}
	
    @Override
	protected void onPause() {
		super.onPause();
		saveState();
	}

private void saveState() {
		String title = mTitleText.getText().toString();
		String body = mBodyText.getText().toString();
		
		if (mRowId == null) {
			long id = mDbHelper.createNote(title, body);
			if (id > 0) {
				mRowId = id;
			}
		} else {
			mDbHelper.updateNote(mRowId, title, body);
		}
	}

@Override
	protected void onResume() {
		super.onResume();
		populateFields();
	}
	
}

나머지는 v2와 동일하네요.

이제 맘에 드는 메모장이 완성되었네요....JSP/Servlet 배울 때 혼자 게시판 맹글었을 때의 그 뿌듯함이 드는 건 왜 일까요? ㅋㅋㅋ

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