ui包注释。

src/ui/AlarmInitReceiver.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//220340038 毛彦翔 2024/4/14 22:57
+
+package net.micode.notes.ui;
+
+import android.app.AlarmManager;
+import android.app.PendingIntent;
+import android.content.BroadcastReceiver;
+import android.content.ContentUris;
+import android.content.Context;
+import android.content.Intent;
+import android.database.Cursor;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+
+
+public class AlarmInitReceiver extends BroadcastReceiver {          //继承了BroadcastReceiver类 这个类在哪呢？
+
+    private static final String [] PROJECTION = new String [] {     //名为PROJECTION的私有 final类型的静态字符串数组 好安全
+        NoteColumns.ID,                                             //某个ID 是AlarmActivity中的同款检索ID吗
+        NoteColumns.ALERTED_DATE                                    //似乎是闹钟提醒的日期。
+    };
+
+    private static final int COLUMN_ID                = 0;
+    private static final int COLUMN_ALERTED_DATE      = 1;          //变量初始化
+
+    @Override
+    public void onReceive(Context context, Intent intent) {         //名为onReceive的公有类
+        long currentDate = System.currentTimeMillis();              //currentDate 初始化为 当前系统时间
+        Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI/*指定了查询的数据源*/,
+                PROJECTION,                                         //33行中定义的数组 返回ID和ALERTED_DATE
+                NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
+                //筛选条件  找到ALERTED_DATE大于当前时间并且TYPE等于TYPE_NOTE的便签。type是什么啊。
+                new String[] { String.valueOf(currentDate) },       //强制转换？把long类型的currentDate转换成String
+                null);                                              //干嘛用的null
+
+        if (c != null) {                //c不为空
+            if (c.moveToFirst()) {      
+                /*将光标移动到结果集中的第一行。如果结果集为空，则此方法将返回 false
+                 *如果结果集非空，则将光标移到第一行，并返回 true
+                 *来自百度
+                 */
+                do {
+                    long alertDate = c.getLong(COLUMN_ALERTED_DATE);
+                    Intent sender = new Intent(context, AlarmReceiver.class);
+                    sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID)));
+                    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0);
+                    AlarmManager alermManager = (AlarmManager) context
+                            .getSystemService(Context.ALARM_SERVICE);
+                    alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent);
+                } while (c.moveToNext());       //遍历查询到的便签挨个设闹钟
+            }
+            c.close();      //释放
+        }
+    }
+} //好困 睡觉