首先创建保存备忘录信息的表：

DbHelper.java

package com.cjq.androidbwl;import android.content.Context;import android.database.sqlite.SQLiteDatabase;import android.database.sqlite.SQLiteDatabase.CursorFactory;import android.database.sqlite.SQLiteOpenHelper;/** *  * @author cjianquan * @since 2014年10月31日 */public class DbHelper extends SQLiteOpenHelper {	public DbHelper(Context context, String name, CursorFactory factory,			int version) {		super(context, name, factory, version);		// TODO Auto-generated constructor stub	}	@Override	public void onCreate(SQLiteDatabase db) {		StringBuilder sql = new StringBuilder();		sql.append("create table if not exists tb_bwl(")		.append("id integer primary key autoincrement,")		.append("title varchar(50),")		.append("content varchar(200),")		.append("createDate varchar(10),")		.append("noticeDate varchar(10),")		.append("noticeTime varchar(5) )");		db.execSQL(sql.toString());			}	@Override	public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {		// TODO Auto-generated method stub	}}

MainActivity.java 

package com.cjq.androidbwl;import java.util.Calendar;import android.app.Activity;import android.app.AlarmManager;import android.app.Dialog;import android.app.PendingIntent;import android.app.TimePickerDialog;import android.content.Context;import android.content.Intent;import android.database.Cursor;import android.database.sqlite.SQLiteDatabase;import android.os.Bundle;import android.util.Log;import android.view.ContextMenu;import android.view.ContextMenu.ContextMenuInfo;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.AdapterContextMenuInfo;import android.widget.AdapterView.OnItemClickListener;import android.widget.ImageButton;import android.widget.ListView;import android.widget.SimpleCursorAdapter;import android.widget.TextView;import android.widget.TimePicker;import android.widget.Toast;/** *  * @author cjianquan * @since 2014年10月31日 */public class MainActivity extends Activity {		private AlarmManager alarmManager=null;	Calendar cal=Calendar.getInstance();	final int DIALOG_TIME = 0; //设置对话框id		private DbHelper dbhelper;	private SQLiteDatabase db;  		SimpleCursorAdapter adapter = null;	ListView lv;	/* (non-Javadoc)	 * @see android.app.Activity#onCreate(android.os.Bundle)	 */	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);				alarmManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);				dbhelper = new DbHelper(this, "db_bwl", null, 1);		db = dbhelper.getReadableDatabase();				Cursor cursor = db.query("tb_bwl", new String[]{"id as _id","title","content","noticeDate","noticeTime"}, null, null, null, null,null);				lv = (ListView)findViewById(R.id.lv_bwlList);				adapter = new SimpleCursorAdapter(this, R.layout.list_item_bwl, cursor, 				new String[]{"title","noticeDate","noticeTime","content"}, 				new int[]{R.id.title,R.id.noticeDate,R.id.noticeTime,R.id.content});		//		ArrayAdapter
    
      adapter = new ArrayAdapter
     
      (this, android.R.layout.simple_expandable_list_item_1, getDatas());				lv.setAdapter(adapter);				this.registerForContextMenu(lv);				lv.setOnItemClickListener(new OnItemClickListener() {			@Override			public void onItemClick(AdapterView
       parent, View view, int position,					long id) {				String title = ((TextView)view.findViewById(R.id.title)).getText().toString();				String content = ((TextView)view.findViewById(R.id.content)).getText().toString();				String noticeDate = ((TextView)view.findViewById(R.id.noticeDate)).getText().toString();				String noticeTime = ((TextView)view.findViewById(R.id.noticeTime)).getText().toString();								Intent intent = new Intent();				intent.setClass(MainActivity.this,AddBwlActivity.class);				Bundle bundle = new Bundle();				bundle.putLong("id", id);				bundle.putString("title", title);				bundle.putString("content", content);				bundle.putString("noticeDate", noticeDate);				bundle.putString("noticeTime", noticeTime);								intent.putExtras(bundle);								startActivity(intent);			}					});						//添加备忘录按钮		ImageButton btnAdd = (ImageButton)findViewById(R.id.btnAdd);		btnAdd.setOnClickListener(new View.OnClickListener() {						@Override			public void onClick(View view) {								Intent intent = new Intent(MainActivity.this,AddBwlActivity.class);				startActivity(intent);			}		});				//		//创建两个Intent,一个是用于AlarmReceiver类处理的，一个是用于广播的//		AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE);//		Intent intent = new Intent(MainActivity.this,AlarmReceiver.class);//		intent.setAction("ALARM_ACTION");//		PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);//		//		//设置真正能让alarm起作用的参数//		//设置alarm是以何种方式发生的，这里用的是以UTC时间为基准，并在alarm发生时同时唤醒设备的模式。//		am.set(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(),pendingIntent);//		am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 10*1000, 60*60*1000, pendingIntent);					}	//长按的上下文菜单	public void onCreateContextMenu(ContextMenu menu,View view,ContextMenuInfo menuInfo){		menu.setHeaderIcon(R.drawable.alarm);		menu.add(0,3,0,"修改");		menu.add(0,4,0,"删除");	}		public boolean onContextItemSelected(MenuItem item){		AdapterContextMenuInfo menuInfo = (AdapterContextMenuInfo)item.getMenuInfo();		switch(item.getItemId()){		case 3:			String title = ((TextView)menuInfo.targetView.findViewById(R.id.title)).getText().toString();			String content = ((TextView)menuInfo.targetView.findViewById(R.id.content)).getText().toString();			String noticeDate = ((TextView)menuInfo.targetView.findViewById(R.id.noticeDate)).getText().toString();			String noticeTime = ((TextView)menuInfo.targetView.findViewById(R.id.noticeTime)).getText().toString();						Intent intent = new Intent();			intent.setClass(this,AddBwlActivity.class);			Bundle bundle = new Bundle();			bundle.putLong("id", menuInfo.id);			bundle.putString("title", title);			bundle.putString("content", content);			bundle.putString("noticeDate", noticeDate);			bundle.putString("noticeTime", noticeTime);						intent.putExtras(bundle);						startActivity(intent);			break;		case 4:			dbhelper = new DbHelper(this, "db_bwl", null, 1);			db = dbhelper.getWritableDatabase();			int status = db.delete("tb_bwl", "id=?", new String[]{""+menuInfo.id});			if(status!=-1){				//删除后更新listview				Cursor cursor = db.query("tb_bwl", new String[]{"id as _id","title","content","noticeDate","noticeTime"}, null, null, null, null,null);				adapter.changeCursor(cursor);//				adapter.notifyDataSetChanged();				Toast.makeText(this, "删除成功", Toast.LENGTH_LONG).show();			}else{				Toast.makeText(this, "删除失败", Toast.LENGTH_LONG).show();			}						break;					}						return true;	}	@Override	protected Dialog onCreateDialog(int id) {		Dialog dialog=null;		switch (id) {		case DIALOG_TIME:		dialog=new TimePickerDialog(		this,		new TimePickerDialog.OnTimeSetListener(){		public void onTimeSet(TimePicker timePicker, int hourOfDay,int minute) {		Calendar c=Calendar.getInstance();//获取日期对象 		c.setTimeInMillis(System.currentTimeMillis()); //设置Calendar对象		c.set(Calendar.HOUR, hourOfDay); //设置闹钟小时数		c.set(Calendar.MINUTE, c.get(Calendar.MINUTE)+1); //设置闹钟的分钟数		c.set(Calendar.SECOND, 0); //设置闹钟的秒数		c.set(Calendar.MILLISECOND, 0); //设置闹钟的毫秒数				Intent intent = new Intent(MainActivity.this, AlarmReceiver.class); //创建Intent对象//		intent.setAction("ALARM_ACTION");		PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0); //创建PendingIntent				//参数说明：http://www.eoeandroid.com/blog-119358-2995.html		alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+30000, pi); //设置闹钟，当前时间就唤醒		Toast.makeText(MainActivity.this, "闹钟设置成功", Toast.LENGTH_LONG).show();//提示用户		}		},		cal.get(Calendar.HOUR_OF_DAY),		cal.get(Calendar.MINUTE),		true);		break;		}				Log.e("AndroidBWL", "onCreateDialog end...");		return dialog;	}	@Override	protected void onResume() {		super.onResume();		Cursor cursor = db.query("tb_bwl", new String[]{"id as _id","title","content","noticeDate","noticeTime"}, null, null, null, null,null);		adapter.changeCursor(cursor);	}					}
     
    

添加activity

AddBwlActivity.java

package com.cjq.androidbwl;import java.util.Calendar;import java.util.Date;import android.app.Activity;import android.app.AlarmManager;import android.app.DatePickerDialog;import android.app.PendingIntent;import android.app.DatePickerDialog.OnDateSetListener;import android.app.Dialog;import android.app.TimePickerDialog;import android.app.TimePickerDialog.OnTimeSetListener;import android.content.ContentValues;import android.content.Context;import android.content.Intent;import android.database.sqlite.SQLiteDatabase;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.DatePicker;import android.widget.EditText;import android.widget.TimePicker;import android.widget.Toast;/** *  * @author cjianquan * @since 2014年10月31日 */public class AddBwlActivity extends Activity {		private EditText etDate = null,etTime=null,etTitle=null,etContent=null;	private Button btnSave = null;		static final int DATE_DIALOG_ID = 0;	static final int TIME_DIALOG_ID = 1;		private DbHelper dbhelper;		 Bundle bundle;  	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.add_bwl);				dbhelper = new DbHelper(this, "db_bwl", null, 1);				etTitle = (EditText)findViewById(R.id.etTitle);		etContent = (EditText)findViewById(R.id.etContent);				etDate = (EditText)findViewById(R.id.etDate);		etDate.setOnClickListener(new View.OnClickListener() {						@Override			public void onClick(View view) {				//并会调用 onCreateDialog(int)回调函数来请求一个Dialog  				showDialog(DATE_DIALOG_ID);							}		});				etTime = (EditText)findViewById(R.id.etTime);		etTime.setOnClickListener(new View.OnClickListener() {						@Override			public void onClick(View view) {				//并会调用 onCreateDialog(int)回调函数来请求一个Dialog  				showDialog(TIME_DIALOG_ID);							}		});						btnSave = (Button)findViewById(R.id.btnSave);		btnSave.setOnClickListener(new View.OnClickListener() {						@Override			public void onClick(View view) {								ContentValues value = new ContentValues();  								String title = etTitle.getText().toString();				String content = etContent.getText().toString();				String noticeDate = etDate.getText().toString();				String noticeTime = etTime.getText().toString();								value.put("title", title);				value.put("content", content);				value.put("noticeDate", noticeDate);				value.put("noticeTime", noticeTime);												SQLiteDatabase db = dbhelper.getWritableDatabase();								long id = 0;								long status = 0;				if(bundle!=null){					id = bundle.getLong("id");					 status = db.update("tb_bwl", value, "id=?", new String[]{bundle.getLong("id")+""});  				}else{					status = db.insert("tb_bwl", null, value); 					id = status;				}								if(status!=-1){					setAlarm(id);					Toast.makeText(AddBwlActivity.this, "保存成功", Toast.LENGTH_LONG).show();                  }else{                      Toast.makeText(AddBwlActivity.this, "保存失败", Toast.LENGTH_LONG).show();                  }  			}		});				//获取上一个activity的传值		bundle = this.getIntent().getExtras();		if(bundle!=null){			etDate.setText(bundle.getString("noticeDate"));			etTime.setText(bundle.getString("noticeTime"));			etTitle.setText(bundle.getString("title"));			etContent.setText(bundle.getString("content"));		}			}				private OnDateSetListener dateSetListener = new OnDateSetListener() {				@Override		public void onDateSet(DatePicker datePicker, int year, int month, int day) {						StringBuilder dateStr = new StringBuilder();			dateStr.append(year).append("-")			.append(month+1).append("-")			.append(day);						etDate.setText(dateStr.toString());		}	};			private OnTimeSetListener timeSetListener = new OnTimeSetListener() {				@Override		public void onTimeSet(TimePicker timePicker, int hour, int minute) {									StringBuilder timeStr = new StringBuilder();			timeStr.append(hour).append(":")			.append(minute);						etTime.setText(timeStr.toString());		}	};		/**      * 当Activity调用showDialog函数时会触发该函数的调用     */  	protected Dialog onCreateDialog(int id){		Calendar cal = Calendar.getInstance();		cal.setTime(new Date());		switch(id){		case DATE_DIALOG_ID:			DatePickerDialog dpd = new DatePickerDialog(this,dateSetListener, cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH));			dpd.setCancelable(true);			dpd.setTitle("选择日期");			dpd.show();			break;		case TIME_DIALOG_ID:			TimePickerDialog tpd = new TimePickerDialog(this, timeSetListener, cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE), true);			tpd.setCancelable(true);			tpd.setTitle("选择时间");			tpd.show();			break;		default:				break;		}		return null;	}		private AlarmManager alarmManager=null;			public void setAlarm(long id){				Log.e("AndroidBWL", "setAlarm start...");						String noticeDate = etDate.getText().toString();		String noticeTime = etTime.getText().toString();				Calendar calendar = Calendar.getInstance();				calendar.set(Integer.parseInt(noticeDate.split("-")[0]), 				Integer.parseInt(noticeDate.split("-")[1])-1, 				Integer.parseInt(noticeDate.split("-")[2]), 				Integer.parseInt(noticeTime.split(":")[0]), 				Integer.parseInt(noticeTime.split(":")[1]));				Log.e("AndroidBWL", ""+(calendar.getTimeInMillis()-System.currentTimeMillis()));								alarmManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);						Intent intent = new Intent(AddBwlActivity.this, AlarmReceiver.class); //创建Intent对象				Bundle bundle = new Bundle();		bundle.putLong("id", id);		bundle.putString("title", etTitle.getText().toString());		bundle.putString("content", etContent.getText().toString());		bundle.putString("noticeDate", etDate.getText().toString());		bundle.putString("noticeTime", etTime.getText().toString());				intent.putExtras(bundle);				//PendingIntent.getBroadcast intent 数据不更新。		//传不同的 action 来解决这个问题		intent.setAction("ALARM_ACTION"+calendar.getTimeInMillis());				PendingIntent pi = PendingIntent.getBroadcast(AddBwlActivity.this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT); //创建PendingIntent				//参数说明：http://www.eoeandroid.com/blog-119358-2995.html		alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis()+5000, pi); //设置闹钟，当前时间就唤醒				Log.e("AndroidBWL", "setAlarm end...");			}}

提醒的广播接收：

AlarmReceiver.java

package com.cjq.androidbwl;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.util.Log;/** *  * @author cjianquan * @since 2014年10月29日 */public class AlarmReceiver extends BroadcastReceiver {		 private Intent mIntent = null;  	 private PendingIntent mPendingIntent = null;  	 private Notification mNotification = null;  	 private NotificationManager mNotificationManager = null;  	@Override	public void onReceive(Context context, Intent intent) {						Log.e("AndroidBWL", "AlarmReceiver:onReceive");				mIntent = intent;				Bundle bundle = mIntent.getExtras();				mNotificationManager = (NotificationManager)context.getSystemService(context.NOTIFICATION_SERVICE);  //        mIntent = new Intent(context,AddBwlActivity.class);          mIntent.setClass(context,AddBwlActivity.class);                mPendingIntent = PendingIntent.getActivity(context, 0, mIntent, 0);          mNotification = new Notification();          mNotification.icon = R.drawable.alarm;          mNotification.tickerText="备忘录";        //设置默认声音、默认振动、和默认闪光灯        mNotification.defaults = Notification.DEFAULT_ALL;        //点击通知后自动取消        mNotification.flags |= Notification.FLAG_AUTO_CANCEL;        mNotification.setLatestEventInfo(context, bundle.getString("title"), bundle.getString("content"), mPendingIntent);          mNotificationManager.notify(1,mNotification); 			}}

AndroidManifest.xml

布局文件：

activity_main.xml

list_item_bwl.xml

add_bwl.xml

设置全局背景图片：

styles.xml