devbox
Cpp五条
这个屌丝很懒，什么也没留下！
关注作者
热门标签
热门文章
当前位置:   article > 正文

Android项目小结---闹铃备忘录小开发知识点（附有：源码下载）_安卓移动应用开发闹铃备忘录

作者：Cpp五条 | 2024-06-05 09:00:01

赞

踩

安卓移动应用开发闹铃备忘录

一、闹铃功能介绍：

1、为每条备忘添加闹铃

2、备忘内容和闹铃信息存在SQL中

3、可删除每天记录和闹铃或者删除所有

4、到点闹铃启动，包括锁屏时和重开机

5、在桌面的创建一个widget类似便签那样的东西显示记录

二、看下效果图：



三、关于SQL部分不再细写，可查看Android应用开发一栏：

添加闹铃和备忘：

1、设置日期：

  1. dateBtn.setOnClickListener(new OnClickListener() {
  2.  
  3. 				@Override
  4. 				public void onClick(View v) {
  5. 					mCalendar = Calendar.getInstance();
  6. 					// TODO Auto-generated method stub
  7. 					new DatePickerDialog(EditTime.this,
  8. 							new DatePickerDialog.OnDateSetListener() {
  9. 								public void onDateSet(DatePicker view,
  10. 										int year, int monthOfYear,
  11. 										int dayOfMonth) {
  12.  
  13. 									mAlarmCalendar.set(Calendar.YEAR, year);
  14. 									mAlarmCalendar.set(Calendar.MONTH,
  15. 											monthOfYear);
  16. 									mAlarmCalendar.set(Calendar.DAY_OF_MONTH,
  17. 											dayOfMonth);
  18. 									EditTime.this.year = year;
  19. 									EditTime.this.month = monthOfYear;
  20. 									EditTime.this.day = dayOfMonth;
  21. 									dateBtn.setText(year + "年" + (month + 1)
  22. 											+ "月" + day + "日");
  23. 									System.out.println(year+"年"+(monthOfYear+1)+"月"+dayOfMonth+"日");
  24. 								}
  25. 							}, year, month, day).show();
  26. 				}
  27. 			});

2、设置时间： 

  1. timeBtn.setOnClickListener(new OnClickListener() {
  2.  
  3. 				@Override
  4. 				public void onClick(View v) {
  5. 					mCalendar = Calendar.getInstance();
  6. 					new TimePickerDialog(EditTime.this,
  7. 							new TimePickerDialog.OnTimeSetListener() {
  8. 								public void onTimeSet(TimePicker view,
  9. 										int hourOfDay, int minute) {
  10. 									mAlarmCalendar.set(Calendar.HOUR_OF_DAY,
  11. 											hourOfDay);
  12. 									mAlarmCalendar.set(Calendar.MINUTE, minute);
  13. 									mAlarmCalendar.set(Calendar.SECOND, 0);
  14. 									mAlarmCalendar.set(Calendar.MILLISECOND, 0);
  15. 									EditTime.this.hour = hourOfDay;
  16. 									EditTime.this.minute = minute;
  17. 									timeBtn.setText(hour + "时" + minute + "分");									
  18. 									System.out.println(hourOfDay+"时"+minute+"分");
  19. 								}
  20. 							}, hour, minute, false).show();
  21. 				}
  22. 			});

3、广播闹铃： 

  1. setBtn.setOnClickListener(new OnClickListener() {
  2.  
  3. 				@Override
  4. 				public void onClick(View v) {
  5. 					// TODO Auto-generated method stub
  6. 					//写进数据库
  7. 					addData();
  8. 					/* 获取闹钟管理的实例 */
  9.  
  10. 					mAlarm = (AlarmManager) getSystemService(Service.ALARM_SERVICE);
  11. 					Intent intent = new Intent(EditTime.this,
  12. 							AlarmReceiver.class);
  13. 					PendingIntent pendingIntent = PendingIntent.getBroadcast(
  14. 							EditTime.this, AlarmIndex, intent, 0);// 第二个参数为区别不同闹铃的唯一标识
  15. 					/* 设置闹钟 */
  16. 					mAlarm.set(AlarmManager.RTC_WAKEUP,
  17. 							mAlarmCalendar.getTimeInMillis(), pendingIntent);
  18. 					finish();
  19. 				}
  20. 			});

4、广播接收BroadcastReceiver：

  1. public class AlarmReceiver extends BroadcastReceiver {
  2. 	@Override
  3. 	public void onReceive(Context context, Intent intent) {
  4. 		// TODO Auto-generated method stub		
  5. 		Intent i = new Intent(context, Alarm.class);
  6. 		i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//这一句很重要，不然会出错
  7. 		context.startActivity(i);
  8. 	}
  9. }

记得注册：

  1. <receiver
  2.             android:name=".AlarmReceiver"
  3.             android:process=":remote" />

5、重启之后重写闹铃，BootReceiver： 

  1. public class BootReceiver extends BroadcastReceiver{
  2. 		
  3. 	@Override
  4. 	public void onReceive(Context context, Intent intent) {
  5. 		// TODO Auto-generated method stub
  6. 		String action = intent.getAction();
  7. 		if(action.equals(Intent.ACTION_BOOT_COMPLETED)){
  8. 			Intent i = new Intent(context, BootAlarm.class);
  9. 			i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//这一句很重要，不然会出错
  10. 			context.startActivity(i);
  11. 		}
  12. 	}
  13. }
同样需要注册： 

  1. <receiver android:name="BootReceiver" >
  2.             <intent-filter>
  3.                 <action android:name="android.intent.action.BOOT_COMPLETED" />
  4.             </intent-filter>
  5.         </receiver>

6、开始重写： 

  1. dbHelper = new DatabaseHelper(BootAlarm.this, "idea.sql");
  2. 		SQLiteDatabase db = dbHelper.getReadableDatabase();
  3. 		Cursor cursor = db.query("user", null, null, null, null, null, null);
  4. 		btAlarmCalendar = Calendar.getInstance();
  5. 		
  6. 			while (cursor.moveToNext()) {
  7. 				btAlarmCalendar = Calendar.getInstance();
  8. 				System.out.println("cursor.moveToNext()-->cursor.getInt(0)-->"
  9. 						+ cursor.getInt(0));
  10. 				time = cursor.getString(cursor.getColumnIndex("mtime"));
  11. 				year = time.substring(0, time.indexOf("年"));
  12. 				myear = Integer.valueOf(year).intValue();
  13. 				month = time.substring(time.indexOf("年")+1, time.indexOf("月"));
  14. 				mmonth = Integer.valueOf(month).intValue()-1;
  15. 				day = time.substring(time.indexOf("月")+1, time.indexOf("日"));
  16. 				mday = Integer.valueOf(day).intValue();
  17. 				hour = time.substring(time.indexOf("日")+1, time.indexOf("时"));
  18. 				mhour = Integer.valueOf(hour).intValue();
  19. 				minute = time.substring(time.indexOf("时")+1, time.indexOf("分"));
  20. 				mminute = Integer.valueOf(minute).intValue();
  21. 				System.out.println(myear + "年" + mmonth + "月" + mday + "日"
  22. 						+ mhour + "时" + mminute);
  23. 				btAlarmCalendar.set(Calendar.YEAR, myear);
  24. 				btAlarmCalendar.set(Calendar.MONTH, mmonth);
  25. 				btAlarmCalendar.set(Calendar.DAY_OF_MONTH, mday);
  26. 				btAlarmCalendar.set(Calendar.HOUR_OF_DAY, mhour);
  27. 				btAlarmCalendar.set(Calendar.MINUTE, mminute);
  28. 				btAlarmCalendar.set(Calendar.SECOND, 0);
  29. 				btAlarmCalendar.set(Calendar.MILLISECOND, 0);
  30. 				mAlarm = (AlarmManager) getSystemService(Service.ALARM_SERVICE);
  31. 				intent = new Intent(BootAlarm.this, AlarmReceiver.class);
  32. 				pendingIntent= PendingIntent.getBroadcast(
  33. 						BootAlarm.this, cursor.getInt(0), intent, 0);// 第二个参数为区别不同闹铃的唯一标识
  34. 				/* 设置闹钟 */
  35. 				mAlarm.set(AlarmManager.RTC_WAKEUP,
  36. 						btAlarmCalendar.getTimeInMillis(), pendingIntent);
  37. 			}

这里有个很需要注意的： 

  1. intent = new Intent(BootAlarm.this, AlarmReceiver.class);
  2. 				pendingIntent= PendingIntent.getBroadcast(
  3. 						BootAlarm.this, cursor.getInt(0), intent, 0);

若是PendingIntent.getBroadcas，则intent必须为启动的是BroadcastReceiver，不然重写不会成功的。


7、到点闹铃响，这是由AlarmReceiver（继承BroadcastReceiver）启动的：

  1. dbHelper = new DatabaseHelper(Alarm.this, "ideal.sql");
  2. 		SQLiteDatabase db = dbHelper.getReadableDatabase();
  3. 		Cursor cursor = db.query("user", null, "_id=?",
  4. 				new String[] { NoteActivity.Alarming_index + "" }, null, null,
  5. 				null);
  6. 		if (cursor.moveToFirst()) {
  7. 			mtime = cursor.getString(cursor.getColumnIndex("mtime"));
  8. 			mtext = cursor.getString(cursor.getColumnIndex("mtext"));
  9. 		}
  10. 		db.close();
  11. 		addData();//写进历史记录表中
  12. 		deleteData(NoteActivity.Alarming_index);//删除原来记录
  13. 		
  14. 		new AlertDialog.Builder(Alarm.this)
  15. 				.setIcon(R.drawable.bell)
  16. 				.setTitle("It's time to do something.")
  17. 				.setMessage(mtext)
  18. 				.setPositiveButton("Done",
  19. 						new DialogInterface.OnClickListener() {
  20. 							public void onClick(DialogInterface dialog,
  21. 									int whichButton) {
  22. 								deleteData(NoteActivity.Alarming_index);//再次删除确认
  23. 								//关闭闹铃声
  24. 								Intent intentSV = new Intent(Alarm.this, MyService.class);
  25. 								stopService(intentSV);
  26. 								Alarm.this.finish();
  27. 							}
  28. 						}).show();

锁屏时也启动闹铃： 

  1. //下面是为了在锁屏时也能启动闹铃
  2. 		getWindow().addFlags(
  3.                 WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
  4.                                 | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
  5. 		getWindow().addFlags(
  6.                 WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
  7.                                 | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
8、置于闹铃音乐可以写一个Service，这个可查看Android学习笔记一栏
9、点击listview可查看记录内容，长按可进行记录的删除，这里不再多写。

10、由于是闹铃，所以必须每一秒中进行更新一下倒计时，这个可以查看Android学习笔记一栏。

11、附：让title每秒显示时间：

  1. 	public class TimeThread extends Thread {
  2. 		@Override
  3. 		public void run() {
  4. 			do {
  5. 				try {
  6. 					Thread.sleep(1000);
  7. 					Message msg = new Message();
  8. 					msg.what = 1;
  9. 					mHandler.sendMessage(msg);
  10. 				} catch (InterruptedException e) {
  11. 					e.printStackTrace();
  12. 				}
  13. 			} while (true);
  14. 		}
  15. 	}
  16.  
  17. 	private Handler mHandler = new Handler() {
  18. 		@Override
  19. 		public void handleMessage(Message msg) {
  20. 			super.handleMessage(msg);
  21. 			switch (msg.what) {
  22. 			case 1:
  23. 				currentTime = new Date();
  24. 				// long sysTime = System.currentTimeMillis();
  25. 				CharSequence sysTimeStr = DateFormat.format(
  26. 						"yyyy年MM月dd日hh:mm:ss", currentTime.getTime());
  27. 				EditTime.this.setTitle(sysTimeStr);
  28. 				break;
  29.  
  30. 			default:
  31. 				break;
  32. 			}
  33. 		}
  34. 	};

------------------（修改版）----------------------


12、是否为记录添加闹铃：

  1. isAlarmBtn.setOnClickListener(new OnClickListener() {
  2.  
  3. 				@Override
  4. 				public void onClick(View v) {
  5. 					// TODO Auto-generated method stub
  6. 					isAlarmNum++;
  7. 					if (isAlarmNum % 2 == 0) {
  8. 						isAlarmBtn.setBackgroundResource(R.drawable.checknull);
  9. 						isAlarm = 0;
  10. 					} else {
  11. 						isAlarmBtn.setBackgroundResource(R.drawable.check);
  12. 						isAlarm = 1;
  13. 					}
  14. 				}
  15. 			});

13、阻止设置时间小于当前时间： 

  1. currentTime = new Date();
  2. 					if (beginTime.getTime() < currentTime.getTime()) {
  3. 						Toast.makeText(EditTime.this, "设置时间不能小于当前时间！",
  4. 								Toast.LENGTH_SHORT).show();
  5. 					}

14、添加widget：

AppWidget.java

  1. public class AppWidget extends AppWidgetProvider {
  2.  
  3. 	private DatabaseHelper dbHelper;
  4. 	String[] desk_text;
  5. 	@Override
  6. 	public void onUpdate(Context context, AppWidgetManager appWidgetManager,
  7. 			int[] appWidgetIds) {
  8. 		// TODO Auto-generated method stub
  9. 		super.onUpdate(context, appWidgetManager, appWidgetIds);
  10. 		//读取数据库中的记录
  11. 		dbHelper = new DatabaseHelper(context, "ideal.sql");
  12. 		SQLiteDatabase db = dbHelper.getReadableDatabase();
  13. 		Cursor cursor = db.query("user", null, null, null, null, null, null);
  14. 		int desk_num=0;
  15. 		//桌面的便签只显示6条记录
  16. 		desk_text = new String[6];
  17. 		while(cursor.moveToNext()){
  18. 			if(desk_num == 6){
  19. 				break;
  20. 			}
  21. 			String temp_text = cursor.getString(cursor.getColumnIndex("mtext"));
  22. 			//控制每条记录显示的长度
  23. 			if(temp_text.length()>7){
  24. 				temp_text=temp_text.substring(0, 7)+"...";
  25. 			}
  26. 			desk_text[desk_num]=temp_text;
  27. 			System.out.println("desk_text[desk_num]"+desk_text[desk_num]);
  28. 			desk_num++;			
  29. 		}
  30. 		db.close();
  31. 		final int Num = appWidgetIds.length;
  32. 		for (int i = 0; i < Num; i++) {
  33. 			int[] mAppWidgetId = appWidgetIds;
  34. 			RemoteViews mRemoteViews = new RemoteViews(context.getPackageName(),
  35. 					R.layout.widget);
  36. 			mRemoteViews.setTextViewText(R.id.desktop_text, array_to_string(desk_text));
  37.  
  38. 			Intent clickIntent = new Intent(context, NoteActivity.class);
  39. 			PendingIntent pdIntent = PendingIntent.getActivity(context, 0,
  40. 					clickIntent, 0);
  41. 			mRemoteViews.setOnClickPendingIntent(R.id.widget_layout, pdIntent);
  42. 			appWidgetManager.updateAppWidget(mAppWidgetId, mRemoteViews);
  43. 		}
  44. 	}
  45. 	//onReceive方法用来接收广播，以便更新桌面的便签
  46. 	
  47. 	@Override
  48. 	public void onReceive(Context context, Intent intent) {
  49. 		// TODO Auto-generated method stub
  50. 		super.onReceive(context, intent);
  51. 		if(intent.getAction().equals("com.ideal.note.widget")){
  52. 			dbHelper = new DatabaseHelper(context, "ideal.sql");
  53. 		SQLiteDatabase db = dbHelper.getReadableDatabase();
  54. 		Cursor cursor = db.query("user", null, null, null, null, null, null);
  55. 		int desk_num=0;
  56. 		desk_text = new String[6];
  57. 		while(cursor.moveToNext()){
  58. 			if(desk_num == 6){
  59. 				break;
  60. 			}
  61. 			String temp_text = cursor.getString(cursor.getColumnIndex("mtext"));
  62. 			if(temp_text.length()>7){
  63. 				temp_text=temp_text.substring(0, 7)+"...";
  64. 			}
  65. 			desk_text[desk_num]=temp_text;
  66. 			System.out.println("desk_text[desk_num]"+desk_text[desk_num]);
  67. 			desk_num++;			
  68. 		}
  69. 		db.close();
  70. 		}
  71. 		RemoteViews mRemoteViews = new RemoteViews(context.getPackageName(), R.layout.widget);
  72. 		mRemoteViews.setTextViewText(R.id.desktop_text, array_to_string(desk_text));
  73. 		AppWidgetManager.getInstance(context).updateAppWidget(new ComponentName(context, AppWidget.class), mRemoteViews);		
  74. 	}
  75. 	
  76. 	//数组转化为字符显示
  77. 	public String array_to_string(String[] array){
  78. 		String temp_str = "";
  79. 		for(int i=0;i<array.length;i++){
  80. 			if(array[i]==null){
  81. 				break;
  82. 			}else {
  83. 				temp_str = temp_str+"\n* "+array[i];
  84. 			}
  85. 		}
  86. 		return  temp_str;
  87. 	}
  88. }

在其他修改了数据库数据的Activity或者其他地方发送一条广播来让AppWidget执行，如在NoteActivity.java中添加： 

  1. Intent mWidgetIntent = new Intent();
  2. 				mWidgetIntent.setAction("com.ideal.note.widget");
  3. 				NoteActivity.this.sendBroadcast(mWidgetIntent);

另，还需在AndroidManifest.xml中添加： 

  1. <receiver android:name=".AppWidget"> 
  2.             <intent-filter>
  3.                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
  4.                 <action android:name="com.ideal.note.widget"/>
  5.             </intent-filter>
  6.             <meta-data  android:name="android.appwidget.provider"
  7.            	android:resource="@xml/appwidget_info"/> 
  8.         </receiver>

附源码下载地址：http://download.csdn.net/detail/moruna/7969393

有疑问的可加入这个qq群聊一起讨论：431922622（奋斗的Android青年 ）


声明：本文内容由网友自发贡献，不代表【wpsshop博客】立场，版权归原作者所有，本站不承担相应法律责任。如您发现有侵权的内容，请联系我们。转载请注明出处：https://www.wpsshop.cn/w/Cpp五条/article/detail/675799
推荐阅读
相关标签

Copyright © 2003-2013 www.wpsshop.cn 版权所有，并保留所有权利。

  

闽ICP备14008679号