使用contentprovider实现的日记(转)

package com.zhang.myDiary;

import com.zhang.myDiary.DiaryColumn.DiaryClmn;

import android.app.Activity;
import android.app.ListActivity;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class MyDiaryActivity extends ListActivity {
	/** Called when the activity is first created. */

	public static final int MENU_ITEM_INSERT = Menu.FIRST;
	public static final int MENU_ITEM_EDIT = Menu.FIRST + 1;
	public static final int MENU_ITEM_DELETE = Menu.FIRST + 2;

	private static final String PROJECTION[] = new String[] { DiaryClmn._ID,
			DiaryClmn.TITLE, DiaryClmn.CREATED };

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		setTitle("wyl的diary");
		getWindow().setBackgroundDrawableResource(R.drawable.diarybg);

		Intent intent = getIntent();

		if (intent.getData() == null) {
			intent.setData(DiaryClmn.CONTENT_URI);

		}

		Cursor cursor = managedQuery(getIntent().getData(), PROJECTION, null,
				null, DiaryClmn.DEFAULT_SORT_ORDER);

		SimpleCursorAdapter adapter = new SimpleCursorAdapter(
				MyDiaryActivity.this, R.layout.mydiary_row, cursor,
				new String[] { DiaryClmn.TITLE, DiaryClmn.CREATED }, new int[] {
						R.id.text1, R.id.created });

		setListAdapter(adapter);
	}

	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		menu.add(0, MENU_ITEM_INSERT, 0, R.string.menu_insert);
		menu.add(0, android.view.Menu.NONE, 1, R.string.menu_insert_2);
		return true;
	}

	public boolean onPrepareOptionsMenu(Menu menu) {

		super.onPrepareOptionsMenu(menu);

		final boolean haveItems = getListAdapter().getCount() > 0;

		if (haveItems) {
			if (getListView().getSelectedItemId() > 0) {
				menu.removeGroup(1);

				Uri uri = ContentUris.withAppendedId(getIntent().getData(),
						getListView().getSelectedItemId());

				Intent intent = new Intent(null, uri);

				menu.add(1, MENU_ITEM_EDIT, 1, "编辑内容").setIntent(intent);
				menu.add(1, MENU_ITEM_DELETE, 1, "删除当前日记");

			}
		} else {
			menu.removeGroup(1);
		}

		return true;
	}

	public boolean onOptionsItemSelected(MenuItem item) {

		switch (item.getItemId()) {
		case MENU_ITEM_INSERT:

			Intent intent0 = new Intent(this, MyDiaryEdit.class);

			intent0.setAction(MyDiaryEdit.INSERT_TEXT_ACTION);
			intent0.setData(getIntent().getData());
			startActivity(intent0);
			return true;

		case MENU_ITEM_EDIT:

			Intent intent1 = new Intent(this, MyDiaryEdit.class);
			intent1.setAction(MyDiaryEdit.EDIT_TEXT_ACTION);
			intent1.setData(item.getIntent().getData());
			startActivity(intent1);
			return true;

		case MENU_ITEM_DELETE:
			Uri uri = ContentUris.withAppendedId(getIntent().getData(),
					getListView().getSelectedItemId());
			getContentResolver().delete(uri, null, null);
			rewindView();
		}

		return super.onOptionsItemSelected(item);
	}

	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
	}

	@Override
	protected void onListItemClick(ListView l, View v, int position, long id) {
		// TODO Auto-generated method stub

		Uri uri = ContentUris.withAppendedId(getIntent().getData(), id);

		startActivity(new Intent(MyDiaryEdit.EDIT_TEXT_ACTION, uri));

	}

	private void rewindView() {
		// TODO Auto-generated method stub
		Cursor cursor = managedQuery(getIntent().getData(), PROJECTION, null,
				null, DiaryClmn.DEFAULT_SORT_ORDER);

		SimpleCursorAdapter adapter = new SimpleCursorAdapter(
				MyDiaryActivity.this, R.layout.mydiary_row, cursor,
				new String[] { DiaryClmn.TITLE, DiaryClmn.CREATED }, new int[] {
						R.id.text1, R.id.created });

		setListAdapter(adapter);

	}
}

package com.zhang.myDiary;

import java.net.URI;

import android.net.Uri;
import android.provider.BaseColumns;
import android.text.StaticLayout;

public class DiaryColumn
{

	public static final String AUTHORITY = "com.zhang.myDiary.Myprovider";

	public DiaryColumn()
	{
	}

	public static final class DiaryClmn implements BaseColumns
	{
		
		private DiaryClmn(){};

		public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/diarias");

		public static final String CONTENT_TYPE = "vnd.android.cursor.dir/vnd.google.diary";

		public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/vnd.google.diary";

		public static final String DEFAULT_SORT_ORDER = "created DESC";

		public static final String TITLE = "title";

		public static final String BODY = "body";

		public static final String CREATED = "created";

	}
}

package com.zhang.myDiary;


import java.util.Calendar;
import java.util.HashMap;

import com.zhang.myDiary.DiaryColumn.DiaryClmn;

import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;
import android.text.TextUtils;
import android.widget.TextView;

public class MyDiaryContentProvider extends ContentProvider
{

	private static final String DATABASE_NAME = "Diarydatabase";
	private static final int DATABASE_VERSION = 1;
	private static final String DIARY_TABLE_NAME = "diary";

	private static final int DIARIES = 1;
	private static final int DIARY_ID = 2;
	
   private MyDiaryBaseHalper myDiaryBaseHalper;
   
  
	
	private Context context;

	private static  UriMatcher  sUriMatcher;
	private static HashMap<String,String>mHashMap;
	
	static{
		
		sUriMatcher=new UriMatcher(UriMatcher.NO_MATCH);
		sUriMatcher.addURI(DiaryColumn.AUTHORITY,"diarias",DIARIES);
		sUriMatcher.addURI(DiaryColumn.AUTHORITY, "diarias/#",DIARY_ID);	
		
		mHashMap=new HashMap<String, String>();
		mHashMap.put(DiaryClmn._ID, DiaryClmn._ID);
		mHashMap.put(DiaryClmn.TITLE, DiaryClmn.TITLE);
		mHashMap.put(DiaryClmn.BODY,DiaryClmn.BODY);
		mHashMap.put(DiaryClmn.CREATED, DiaryClmn.CREATED);
	}
	
	

	
	public static class MyDiaryBaseHalper extends SQLiteOpenHelper{

		public MyDiaryBaseHalper(Context context, String name, CursorFactory factory, int version)
		{
			super(context, name, factory, version);
			// TODO Auto-generated constructor stub
		}

		@Override
		public void onCreate(SQLiteDatabase db)
		{
			// TODO Auto-generated method stub
			
			String sql="CREATE TABLE diary("+DiaryClmn._ID+" INTEGER PRIMARY KEY,"+DiaryClmn.TITLE+"  TEXT,"+DiaryClmn.BODY+" TEXT,"+DiaryClmn.CREATED+"  TEXT"+");";
			
			db.execSQL(sql);
		}

		@Override
		public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
		{
			// TODO Auto-generated method stub
			db.execSQL("DROP TABLE IF EXISTS diary");
			onCreate(db);
		}
		
		
	}
	
	@Override
	public boolean onCreate()
	{
		// TODO Auto-generated method stub
		myDiaryBaseHalper=new MyDiaryBaseHalper(getContext(), DATABASE_NAME, null,DATABASE_VERSION);
		return true;
	}

	@Override
	public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder)
	{
		// TODO Auto-generated method stub
		SQLiteQueryBuilder dp=new SQLiteQueryBuilder();
		
		switch (sUriMatcher.match(uri))
		{
		case DIARIES :
			
			dp.setTables(DIARY_TABLE_NAME);
			dp.setProjectionMap(mHashMap);
			break;

		case DIARY_ID:
			dp.setTables(DIARY_TABLE_NAME);
			dp.setProjectionMap(mHashMap);
			dp.appendWhere(DiaryClmn._ID+"="+uri.getPathSegments().get(1));
			break;
		default:
			throw new IllegalArgumentException("错误 的uri:"+uri);
		}
		
		String olderBY;
		if (TextUtils.isEmpty(sortOrder))
		{
			olderBY=DiaryClmn.DEFAULT_SORT_ORDER;
		}else {
			olderBY=sortOrder;
		}
		
		SQLiteDatabase db=myDiaryBaseHalper.getReadableDatabase();
		
		Cursor cursor=dp.query(db, projection, selection, selectionArgs, null,null, olderBY);
		cursor.setNotificationUri(getContext().getContentResolver(), uri);
		return cursor;
	}

	@Override
	public String getType(Uri uri)
	{
		// TODO Auto-generated method stub
		switch (sUriMatcher.match(uri))
		{
		case DIARIES:
			
			return DiaryClmn.CONTENT_ITEM_TYPE;
		case DIARY_ID:
			
			return DiaryClmn.CONTENT_ITEM_TYPE;

		default:
			throw new IllegalArgumentException("Unknown URI " + uri);
		}
		
	}

	@Override
	public Uri insert(Uri uri, ContentValues values)
	{
		// TODO Auto-generated method stub
		SQLiteDatabase db=myDiaryBaseHalper.getWritableDatabase();
		
		long rwId=db.insert(DIARY_TABLE_NAME, DiaryClmn.BODY, values);
		
		if (rwId>0)
		{
			Uri rwIdUri=ContentUris.withAppendedId(DiaryClmn.CONTENT_URI, rwId);
			
			getContext().getContentResolver().notifyChange(rwIdUri,null);
			
			return rwIdUri;
		}
		throw new SQLException("Failed to insert row into " + uri);
	}

	@Override
	public int delete(Uri uri, String selection, String[] selectionArgs)
	{
		// TODO Auto-generated method stub
		SQLiteDatabase db=myDiaryBaseHalper.getWritableDatabase();
		
		String rwId=uri.getPathSegments().get(1);
		
		return db.delete(DIARY_TABLE_NAME, selection+"="+rwId,null);
	}

	@Override
	public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs)
	{
		// TODO Auto-generated method stub
		
		SQLiteDatabase db=myDiaryBaseHalper.getWritableDatabase();
		
			
			String rwId=uri.getPathSegments().get(1);
			return db.update(DIARY_TABLE_NAME, values, DiaryClmn._ID+"="+rwId,null);
			
		
	}
	
	public static String getFormateCreatedDate() {
		Calendar calendar = Calendar.getInstance();
		String created = calendar.get(Calendar.YEAR) + "年"
				+ calendar.get(Calendar.MONTH) + "月"
				+ calendar.get(Calendar.DAY_OF_MONTH) + "日"
				+ calendar.get(Calendar.HOUR_OF_DAY) + "时"
				+ calendar.get(Calendar.MINUTE) + "分";
		return created;
	}

}

package com.zhang.myDiary;

import com.zhang.myDiary.DiaryColumn.DiaryClmn;

import android.app.Activity;
import android.content.ContentValues;
import android.content.Intent;

import android.database.Cursor;
import android.graphics.Paint;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MyDiaryEdit extends Activity
{
	
	private static final String TAG = "Diary";
	public static final String EDIT_TEXT_ACTION="com.zhang.myDiary.MyDiaryEdit.EDIT_DIARY";
	public static final String INSERT_TEXT_ACTION="com.zhang.myDiary.MyDiaryEdit.action.INSERT_DIARY";
	
	private static final String []projection=new String[]{DiaryClmn._ID,DiaryClmn.TITLE,DiaryClmn.BODY};
	
	private static final int STATE_EDIT = 0;
	private static final int STATE_INSERT = 1;

	private int mState;

	private Uri mUri;
	private Cursor mCursor;

	private EditText mTitleText;
	private EditText mBodyText;
	private Button confirmButton,modifyButton; 
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setTheme(android.R.style.Theme_Black);
		
		final Intent intent=getIntent();
		
		final String  action=intent.getAction();
		setContentView(R.layout.mydiaryedit);
		mTitleText=(EditText)findViewById(R.id.title);
		mBodyText=(EditText)findViewById(R.id.body);
	
		confirmButton=(Button)findViewById(R.id.confirm);
		modifyButton=(Button)findViewById(R.id.modified);
		
		if (EDIT_TEXT_ACTION.equals(action))
		{
			mState=STATE_EDIT;
			mTitleText.setEnabled(false);
			mBodyText.setEnabled(false);
			modifyButton.setVisibility(View.VISIBLE);
			mUri=intent.getData();
			mCursor=managedQuery(mUri, projection, null, null,null);
			mCursor.moveToFirst();
			String title=mCursor.getString(1);
			mTitleText.setTextKeepState(title);
			String body=mCursor.getString(2);
			mBodyText.setTextKeepState(body);
			
			
			setResult(RESULT_OK, new Intent(MyDiaryEdit.EDIT_TEXT_ACTION, mUri));
			setTitle("编辑日记");
		}else if (INSERT_TEXT_ACTION.equals(action))
		{
			mState = STATE_INSERT;
			setTitle("新建日记");
		}else {
			
		Log.e(TAG, "no such action error");
		MyDiaryEdit.this.finish();
			
			return ;
		}
	
		confirmButton.setOnClickListener(new MyBtnOnClickListen());
		modifyButton.setOnClickListener(new MyBtnOnClickListen());
		
	}
	private class MyBtnOnClickListen implements Button.OnClickListener{

		
		@Override
		public void onClick(View v)
		{
			// TODO Auto-generated method stub
			switch (v.getId())
			{
			case R.id.confirm:
				
				if (mState==STATE_INSERT)
				{
					insertDiary();
					
					
				}else {
					
					//mTitleText.setEnabled(true);
					//mBodyText.setEnabled(true);
					updataDiary();
				}
				Intent intent=new Intent();
				setResult(RESULT_OK, intent);
				finish();
				
				break;

			case R.id.modified:
				mTitleText.setEnabled(true);
				mBodyText.setEnabled(true);
				break;
			}
		}

		private void insertDiary()
		{
			// TODO Auto-generated method stub
			ContentValues values=new ContentValues();
			
			String title=mTitleText.getText().toString();
			String body=mBodyText.getText().toString();
			
			values.put(DiaryClmn.CREATED,MyDiaryContentProvider.getFormateCreatedDate());
			values.put(DiaryClmn.TITLE,title);
			values.put(DiaryClmn.BODY,body);
		
		
			getContentResolver().insert(DiaryClmn.CONTENT_URI, values);
			
		}
		
		private void updataDiary()
		{
			// TODO Auto-generated method stub
			ContentValues values=new ContentValues();
			
			String title=mTitleText.getText().toString();
			String body=mBodyText.getText().toString();
			
			values.put(DiaryClmn.CREATED,MyDiaryContentProvider.getFormateCreatedDate());
			values.put(DiaryClmn.TITLE, title);
			values.put(DiaryClmn.BODY, body);
			getContentResolver().update(mUri, values, null,null);
			
		}
		
	}
}