这是我的一些关于ui理解的注释

src/Xiaominotes/app/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java

@@ -38,7 +38,10 @@ import net.micode.notes.data.Notes;
 import net.micode.notes.tool.DataUtils;
 
 import java.io.IOException;
-
+/*
+author:刘瑞轩
+日期：2023-4-12
+*/
 
 public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
     private long mNoteId;
@@ -48,23 +51,23 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
+        super.onCreate(savedInstanceState);//创建实例
-        requestWindowFeature(Window.FEATURE_NO_TITLE);
+        requestWindowFeature(Window.FEATURE_NO_TITLE);//没有标题
 
-        final Window win = getWindow();
+        final Window win = getWindow();//获取一个窗口对象
-        win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
+        win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);//允许应用程序在设备处于锁定状态时显示窗口,如果该标志被设置，则即使用户没有解锁设备，该应用程序仍然可以正常运行。
 
-        if (!isScreenOn()) {
+        if (!isScreenOn()) {//在屏幕是关闭的情况下
-            win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
+            win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON//保持屏幕常亮，以防止设备进入休眠状态。
-                    | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
+                    | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON//在锁定状态下唤醒屏幕。如果该标志被设置，则当 Activity 启动时，系统将唤醒设备并点亮屏幕。
-                    | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
+                    | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON//允许在屏幕常亮时锁定设备。
-                    | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
+                    | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);//允许布局扩展到屏幕装饰区域（例如状态栏）之下。
         }
 
-        Intent intent = getIntent();
+        Intent intent = getIntent();//获取页面
 
         try {
-            mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
+            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)
@@ -89,11 +92,12 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
     }
 
     private void playAlarmSound() {
+        //获取系统中当前默认的闹钟铃声所对应的 Uri，并将其赋值给 url 变量
         Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
-
+        //获取当前系统中哪些音频流会受到静音模式的影响
         int silentModeStreams = Settings.System.getInt(getContentResolver(),
                 Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
-
+        //如果STREAM_ALARM受到影响，那么就将音频流形式设置为silentModeStreams
         if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) {
             mPlayer.setAudioStreamType(silentModeStreams);
         } else {
@@ -101,7 +105,7 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
         }
         try {
             mPlayer.setDataSource(this, url);
-            mPlayer.prepare();
+            mPlayer.prepare();//于为音频播放做一些准备工作。具体来说，该方法会解析音频数据、分离音频轨道、获取音频格式信息等操作
             mPlayer.setLooping(true);
             mPlayer.start();
         } catch (IllegalArgumentException e) {
@@ -121,22 +125,22 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
 
     private void showActionDialog() {
         AlertDialog.Builder dialog = new AlertDialog.Builder(this);
-        dialog.setTitle(R.string.app_name);
+        dialog.setTitle(R.string.app_name);//设置对话框的标题
-        dialog.setMessage(mSnippet);
+        dialog.setMessage(mSnippet);//设置对话框的信息
-        dialog.setPositiveButton(R.string.notealert_ok, this);
+        dialog.setPositiveButton(R.string.notealert_ok, this);//设置确认按钮，在确认按钮按下后显示对话框
         if (isScreenOn()) {
-            dialog.setNegativeButton(R.string.notealert_enter, this);
+            dialog.setNegativeButton(R.string.notealert_enter, this);//关闭对话框
         }
-        dialog.show().setOnDismissListener(this);
+        dialog.show().setOnDismissListener(this);//执行相关的动作
     }
 
     public void onClick(DialogInterface dialog, int which) {
         switch (which) {
             case DialogInterface.BUTTON_NEGATIVE:
-                Intent intent = new Intent(this, NoteEditActivity.class);
+                Intent intent = new Intent(this, NoteEditActivity.class);//新创建一个页面
-                intent.setAction(Intent.ACTION_VIEW);
+                intent.setAction(Intent.ACTION_VIEW);//显示页面
-                intent.putExtra(Intent.EXTRA_UID, mNoteId);
+                intent.putExtra(Intent.EXTRA_UID, mNoteId);//放入对应的数据库中
-                startActivity(intent);
+                startActivity(intent);//运行该页面
                 break;
             default:
                 break;
@@ -144,14 +148,14 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
     }
 
     public void onDismiss(DialogInterface dialog) {
-        stopAlarmSound();
+        stopAlarmSound();//关闭闹钟铃声
-        finish();
+        finish();//该页面结束
     }
 
     private void stopAlarmSound() {
-        if (mPlayer != null) {
+        if (mPlayer != null) {//如果该播放器存在
-            mPlayer.stop();
+            mPlayer.stop();//停下
-            mPlayer.release();
+            mPlayer.release();//释放资源
             mPlayer = null;
         }
     }

src/Xiaominotes/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java

@@ -86,7 +86,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
 
     private static final Map<Integer, Integer> sBgSelectorBtnsMap = new HashMap<Integer, Integer>();
     static {
-        sBgSelectorBtnsMap.put(R.id.iv_bg_yellow, ResourceParser.YELLOW);
+            sBgSelectorBtnsMap.put(R.id.iv_bg_yellow, ResourceParser.YELLOW);
         sBgSelectorBtnsMap.put(R.id.iv_bg_red, ResourceParser.RED);
         sBgSelectorBtnsMap.put(R.id.iv_bg_blue, ResourceParser.BLUE);
         sBgSelectorBtnsMap.put(R.id.iv_bg_green, ResourceParser.GREEN);
@@ -430,7 +430,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         if (id == R.id.btn_set_bg_color) {
             mNoteBgColorSelector.setVisibility(View.VISIBLE);
             findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility(
-                    -                    View.VISIBLE);
+                    View.VISIBLE);
         } else if (sBgSelectorBtnsMap.containsKey(id)) {
             findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility(
                     View.GONE);