From 59dbe07a371bf3cb732cc654aea96342a3c0d71f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=BD=95=E6=80=9D=E6=BA=90?= <1308063943@qq.com> Date: Sun, 29 Jun 2025 20:55:37 +0800 Subject: [PATCH] =?UTF-8?q?=E5=87=86=E5=A4=87=E6=B3=A8=E9=87=8A?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../micode/notes/ui/AlarmAlertActivity.java | 59 +++++++++++++++++-- .../micode/notes/ui/AlarmInitReceiver.java | 3 +- 2 files changed, 55 insertions(+), 7 deletions(-) diff --git a/app/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java b/app/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java index 85723be..d314949 100644 --- a/app/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java +++ b/app/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java @@ -41,34 +41,44 @@ import java.io.IOException; public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener { - private long mNoteId; - private String mSnippet; + 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; + //初始化Activity,获取便签数据,设置窗口属性,启动闹钟。 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); + //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 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; + //getContentResolver()是实现数据共享,实例存储。 mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0, SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info) : mSnippet; + //判断标签片段是否达到符合长度 } catch (IllegalArgumentException e) { e.printStackTrace(); return; @@ -77,20 +87,26 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD 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(); + //完成闹钟动作 } } private boolean isScreenOn() { + //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 PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); return pm.isScreenOn(); } + //播放系统默认闹钟铃声,处理静音模式。 private void playAlarmSound() { + //闹钟提示音激发 Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM); - + //调用系统的铃声管理URI,得到闹钟提示音 int silentModeStreams = Settings.System.getInt(getContentResolver(), Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0); @@ -101,12 +117,19 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD } try { mPlayer.setDataSource(this, url); + //方法:setDataSource(Context context, Uri uri) + //解释:无返回值,设置多媒体数据来源【根据 Uri】 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(); + //e.printStackTrace()函数功能是抛出异常, 还将显示出更深的调用信息 + //System.out.println(e),这个方法打印出异常,并且输出在哪里出现的异常 } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); @@ -119,39 +142,63 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD } } + //显示操作对话框,包含便签内容和操作按钮。 private void showActionDialog() { AlertDialog.Builder dialog = new AlertDialog.Builder(this); + //AlertDialog的构造方法全部是Protected的 + //所以不能直接通过new一个AlertDialog来创建出一个AlertDialog。 + //要创建一个AlertDialog,就要用到AlertDialog.Builder中的create()方法 + //如这里的dialog就是新建了一个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); - } + }//对话框添加"No"按钮 dialog.show().setOnDismissListener(this); } + //处理对话框按钮点击事件 public void onClick(DialogInterface dialog, int which) { switch (which) { + //用which来选择click后下一步的操作 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); + //实现key-value对 + //EXTRA_UID为key;mNoteId为键 startActivity(intent); + //开始动作 break; default: + //这是确定操作 break; } } + //对话框关闭时停止铃声并结束Activity public void onDismiss(DialogInterface dialog) { + //忽略 stopAlarmSound(); + //停止闹钟声音 finish(); + //完成该动作 } + //停止播放并释放MediaPlayer资源。 private void stopAlarmSound() { if (mPlayer != null) { mPlayer.stop(); + //停止播放 mPlayer.release(); + //释放MediaPlayer对象 mPlayer = null; } } diff --git a/app/src/main/java/net/micode/notes/ui/AlarmInitReceiver.java b/app/src/main/java/net/micode/notes/ui/AlarmInitReceiver.java index f221202..704decd 100644 --- a/app/src/main/java/net/micode/notes/ui/AlarmInitReceiver.java +++ b/app/src/main/java/net/micode/notes/ui/AlarmInitReceiver.java @@ -34,7 +34,7 @@ public class AlarmInitReceiver extends BroadcastReceiver { 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; @@ -45,6 +45,7 @@ public class AlarmInitReceiver extends BroadcastReceiver { 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); if (c != null) {