From 14e9ef4c70533be0c8b266a4345ede93e444f3e1 Mon Sep 17 00:00:00 2001
From: pfobcetwf <3572257496@qq.com>
Date: Sun, 22 Dec 2024 16:57:55 +0800
Subject: [PATCH] ADD file via upload

---
 AlarmInitReceiver.java.txt | 57 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 AlarmInitReceiver.java.txt

diff --git a/AlarmInitReceiver.java.txt b/AlarmInitReceiver.java.txt
new file mode 100644
index 0000000..726d7e3
--- /dev/null
+++ b/AlarmInitReceiver.java.txt
@@ -0,0 +1,57 @@
+AlarmInitReceiver.java
+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 {
+ 
+    private static final String [] PROJECTION = new String [] {
+        NoteColumns.ID,
+        NoteColumns.ALERTED_DATE
+    };
+    //对数据库的操作，调用标签ID和闹钟时间
+    private static final int COLUMN_ID                = 0;
+    private static final int COLUMN_ALERTED_DATE      = 1;
+ 
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        long currentDate = System.currentTimeMillis();
+        //System.currentTimeMillis()产生一个当前的毫秒
+        //这个毫秒其实就是自1970年1月1日0时起的毫秒数
+        Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
+                PROJECTION,
+                NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
+                new String[] { String.valueOf(currentDate) },
+                //将long变量currentDate转化为字符串
+                null);
+        //Cursor在这里的作用是通过查找数据库中的标签内容，找到和当前系统时间相等的标签
+ 
+        if (c != null) {
+            if (c.moveToFirst()) {
+                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());
+            }
+            c.close();
+        }
+        //然而通过网上查找资料发现，对于闹钟机制的启动，通常需要上面的几个步骤
+        //如新建Intent、PendingIntent以及AlarmManager等
+        //这里就是根据数据库里的闹钟时间创建一个闹钟机制
+    }
+}
\ No newline at end of file