diff --git a/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java b/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java
index 85723be..7370d57 100644
--- a/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java
+++ b/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java
@@ -14,145 +14,200 @@
  * limitations under the License.
  */
 
-package net.micode.notes.ui;
-
-import android.app.Activity;
-import android.app.AlertDialog;
-import android.content.Context;
-import android.content.DialogInterface;
-import android.content.DialogInterface.OnClickListener;
-import android.content.DialogInterface.OnDismissListener;
-import android.content.Intent;
-import android.media.AudioManager;
-import android.media.MediaPlayer;
-import android.media.RingtoneManager;
-import android.net.Uri;
-import android.os.Bundle;
-import android.os.PowerManager;
-import android.provider.Settings;
-import android.view.Window;
-import android.view.WindowManager;
-
-import net.micode.notes.R;
-import net.micode.notes.data.Notes;
-import net.micode.notes.tool.DataUtils;
-
-import java.io.IOException;
-
-
-public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
-    private long mNoteId;
-    private String mSnippet;
-    private static final int SNIPPET_PREW_MAX_LEN = 60;
-    MediaPlayer mPlayer;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        requestWindowFeature(Window.FEATURE_NO_TITLE);
-
-        final Window win = getWindow();
-        win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
-
-        if (!isScreenOn()) {
-            win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
-                    | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
-                    | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
-                    | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
-        }
-
-        Intent intent = getIntent();
-
-        try {
-            mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
-            mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
-            mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
-                    SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)
-                    : mSnippet;
-        } catch (IllegalArgumentException e) {
-            e.printStackTrace();
-            return;
-        }
-
-        mPlayer = new MediaPlayer();
-        if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
-            showActionDialog();
-            playAlarmSound();
-        } else {
-            finish();
-        }
-    }
-
-    private boolean isScreenOn() {
-        PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
-        return pm.isScreenOn();
-    }
-
-    private void playAlarmSound() {
-        Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
-
-        int silentModeStreams = Settings.System.getInt(getContentResolver(),
-                Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
-
-        if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) {
-            mPlayer.setAudioStreamType(silentModeStreams);
-        } else {
-            mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
-        }
-        try {
-            mPlayer.setDataSource(this, url);
-            mPlayer.prepare();
-            mPlayer.setLooping(true);
-            mPlayer.start();
-        } catch (IllegalArgumentException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (SecurityException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (IllegalStateException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (IOException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        }
-    }
-
-    private void showActionDialog() {
-        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
-        dialog.setTitle(R.string.app_name);
-        dialog.setMessage(mSnippet);
-        dialog.setPositiveButton(R.string.notealert_ok, this);
-        if (isScreenOn()) {
-            dialog.setNegativeButton(R.string.notealert_enter, this);
-        }
-        dialog.show().setOnDismissListener(this);
-    }
-
-    public void onClick(DialogInterface dialog, int which) {
-        switch (which) {
-            case DialogInterface.BUTTON_NEGATIVE:
-                Intent intent = new Intent(this, NoteEditActivity.class);
-                intent.setAction(Intent.ACTION_VIEW);
-                intent.putExtra(Intent.EXTRA_UID, mNoteId);
-                startActivity(intent);
-                break;
-            default:
-                break;
-        }
-    }
-
-    public void onDismiss(DialogInterface dialog) {
-        stopAlarmSound();
-        finish();
-    }
-
-    private void stopAlarmSound() {
-        if (mPlayer != null) {
-            mPlayer.stop();
-            mPlayer.release();
-            mPlayer = null;
-        }
-    }
-}
+ package net.micode.notes.ui;
+
+ import android.app.Activity;
+ import android.app.AlertDialog;
+ import android.content.Context;
+ import android.content.DialogInterface;
+ import android.content.DialogInterface.OnClickListener;
+ import android.content.DialogInterface.OnDismissListener;
+ import android.content.Intent;
+ import android.media.AudioManager;
+ import android.media.MediaPlayer;
+ import android.media.RingtoneManager;
+ import android.net.Uri;
+ import android.os.Bundle;
+ import android.os.PowerManager;
+ import android.provider.Settings;
+ import android.view.Window;
+ import android.view.WindowManager;
+ 
+ import net.micode.notes.R;
+ import net.micode.notes.data.Notes;
+ import net.micode.notes.tool.DataUtils;
+ 
+ import java.io.IOException;
+ 
+ /**
+  * @classname: AlarmAlertActivity
+  * @description:设置闹钟提示
+  * @date: 2023/12/28 11:18
+  * @author: wangrunze
+ */
+ public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
+     private long mNoteId;//文本在数据库存储中的ID号
+     private String mSnippet;//闹钟提示时出现的文本片段
+     private static final int SNIPPET_PREW_MAX_LEN = 60;
+     MediaPlayer mPlayer;
+     //Bundle类型的数据与Map类型的数据相似，都是以key-value的形式存储数据的
+     //onsaveInstanceState方法是用来保存Activity的状态的,能从onCreate的参数savedInsanceState中获得状态数据
+ 
+     /**
+      * @classname: AlarmAlertActivity
+      * @methodname onCreate
+      * @description:创建界面并进行初始化操作
+      * @date: 2023/12/28 11:27
+      * @author: wangrunze
+      * @param: Bundle savedInstanceState
+     */
+     @Override
+     protected void onCreate(Bundle savedInstanceState) {
+         super.onCreate(savedInstanceState);
+         requestWindowFeature(Window.FEATURE_NO_TITLE);//界面显示——无标题
+ 
+         final Window win = getWindow();
+         win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
+ 
+         if (!isScreenOn()) {
+             win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON//保持窗体点亮
+                     | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON//将窗体点亮
+                     | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON//允许窗体点亮时锁屏
+                     | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);//在手机锁屏后如果到了闹钟提示时间，点亮屏幕
+         }
+ 
+         Intent intent = getIntent();
+ 
+         try {
+             mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
+             mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);//根据ID从数据库中获取标签的内容
+             mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
+                     SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)//判断标签片段是否达到符合长度
+                     : mSnippet;
+         } catch (IllegalArgumentException e) {
+             e.printStackTrace();
+             return;
+         }
+ 
+         mPlayer = new MediaPlayer();
+         if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
+             showActionDialog();//弹出对话框
+             playAlarmSound();//闹钟提示音激发
+         } else {
+             finish();
+         }
+     }
+ 
+     /**
+      * @classname: AlarmAlertActivity
+      * @methodname isScreenOn
+      * @description:判断屏幕是否锁屏，调用系统函数判断，最后返回值是布尔类型
+      * @date: 2023/12/28 11:28
+      * @author: wangrunze
+      * @return: pm.isScreenOn()
+     */
+     private boolean isScreenOn() {
+         PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
+         return pm.isScreenOn();
+     }
+ 
+     /**
+      * @classname: AlarmAlertActivity
+      * @methodname playAlarmSound
+      * @description:闹钟提示音启动激发
+      * @date: 2023/12/28 11:29
+      * @author: wangrunze
+     */
+ 
+     private void playAlarmSound() {
+         Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
+ 
+         int silentModeStreams = Settings.System.getInt(getContentResolver(),
+                 Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0); //调用系统的铃声管理URI，得到闹钟提示音
+ 
+         if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) {
+             mPlayer.setAudioStreamType(silentModeStreams);
+         } else {
+             mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
+         }
+         try {
+             mPlayer.setDataSource(this, url);//无返回值，设置多媒体数据来源
+             mPlayer.prepare();//准备同步
+             mPlayer.setLooping(true);//设置是否循环播放
+             mPlayer.start();//开始播放
+         } catch (IllegalArgumentException e) {
+             // TODO Auto-generated catch block
+             e.printStackTrace();//抛出异常， 还将显示出更深的调用信息
+         } catch (SecurityException e) {
+             // TODO Auto-generated catch block
+             e.printStackTrace();
+         } catch (IllegalStateException e) {
+             // TODO Auto-generated catch block
+             e.printStackTrace();
+         } catch (IOException e) {
+             // TODO Auto-generated catch block
+             e.printStackTrace();
+         }
+     }
+ 
+     /**
+      * @classname: AlarmAlertActivity
+      * @methodname showActionDialog
+      * @description:新建对话框
+      * @date: 2023/12/28 11:30
+      * @author: wangrunze
+     */
+ 
+     private void showActionDialog() {
+         AlertDialog.Builder dialog = new AlertDialog.Builder(this);//用到AlertDialog.Builder中的create()新建了一个AlertDialog
+         dialog.setTitle(R.string.app_name);//为对话框设置标题
+         dialog.setMessage(mSnippet);//为对话框设置内容
+         dialog.setPositiveButton(R.string.notealert_ok, this);//给对话框添加"Yes"按钮
+         if (isScreenOn()) {
+             dialog.setNegativeButton(R.string.notealert_enter, this);//给对话框添加"no"按钮
+         }
+         dialog.show().setOnDismissListener(this);
+     }
+ 
+     //DialogInterface dialog为对话框，which为选择按钮,功能为选择各种操作
+     public void onClick(DialogInterface dialog, int which) {
+         switch (which) {
+             case DialogInterface.BUTTON_NEGATIVE://这是取消操作
+                 Intent intent = new Intent(this, NoteEditActivity.class);//实现两个类间的数据传输
+                 intent.setAction(Intent.ACTION_VIEW);//设置动作属性
+                 intent.putExtra(Intent.EXTRA_UID, mNoteId);
+                 startActivity(intent);
+                 break;
+             default:
+                 break;
+         }
+     }
+ 
+     /**
+      * @classname: AlarmAlertActivity
+      * @methodname onDismiss
+      * @description:停止闹钟声音
+      * @date: 2023/12/28 11:30
+      * @author: wangrunze
+      * @param:DialogInterface dialog
+     */
+     public void onDismiss(DialogInterface dialog) {
+         stopAlarmSound();
+         finish();
+     }
+     /**
+      * @classname: AlarmAlertActivity
+      * @methodname: stopAlarmSound
+      * @description:
+      * @date: 2023/12/28 11:31
+      * @author: wangrunze
+     */
+     private void stopAlarmSound() {
+         if (mPlayer != null) {
+             mPlayer.stop();
+             mPlayer.release();
+             mPlayer = null;
+         }
+     }
+ }
+ 
\ No newline at end of file